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Nobuki Matsui, Yoshihiro Nakagawa, Shingo Itoh, Sumio Shiochi, Kousuke ...
Article type: Article
Session ID: D-40
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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Generally, the multi-split-type A/C systems are designed based on managing temperature and humidity including outdoor air, which result in low evaporation temperature to manage humidity. We can expect large improvement on efficiency using our new high efficient desiccant system combined with high temperature evaporation type multi-type A/C by managing temperature and humidity separately. In this research, we establish a simulation tool to evaluate the energy-saving performance of this system. In this paper, we report the verification result between experimental result and simulation result using experimental data.
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Masao KURODA, Megumu YUZAWA, Kazuya KIMURA, Tetsuo ARAI
Article type: Article
Session ID: D-41
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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Characteristics of simple desiccant elements which constitute air flow channels separated by a thin desiccant sheet have been studied theoretically. The flow channels for treating air lie at right angles to that of drying air. Adsorption and desorption of humidity are conducted on both sides of the desiccant sheets simultaneously. Effects of treating and drying air flow rates, diffusion resistance of humidity in the desiccant sheets and air flow channel length on dehumidifying and temperature and enthalpy exchange efficiencies have been analyzed.
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Takeshi TAKATSUKA, Ryoko KUKITA, Masazumi GODO, Shinji SHINDO
Article type: Article
Session ID: D-42
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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We developed the total heat exchange system of the thin rotor type with low pressure drop. The new system using the sorbent for the low temperature desorption was high performance. It was investigated the system performance in the summer conditions, such as outside of 35℃, 23g/kg(DA) and inside of 27℃, 11.7g/kg(DA). As the results, it was shown that the rotor parts of the system processed similarly the latent heat and sensible heat. It was indicated that the state of the each process was plotted on a straight line on the psychometric chart. We evaluated the heat distribution of the total heat exchange system in operation by the thermo camera. It was confirmed that the rotor end was the hottest by the adsorption-heat. The each efficiency was influenced by the rotational speed. It was indicated that the thin rotor system have the enthalpy efficiency of 79%, the temperature efficiency of 87%, the dehumidification efficiency of 76%.
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Emi NISHIKAWA, Katsunori NAGANO, Makoto NAKAMURA, Saya NAKABAYASHI, Jy ...
Article type: Article
Session ID: D-43
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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The objective of this study is to develop a desiccant system using natural mesoporous material, Wakkanai siliceous shale. A honeycombed desiccant rotor containing this shale's powder and chlorides was made and evaluated. The dehumidification ability was 7〜15% higher than that of the silica-gel rotor. Amount of dehumidification gave 3.0〜5.6 g/kg_<DA> at the range of 0.5〜10 rpm. The rate of energy reduction to remove the outdoor air-conditioning load was estimated to be 50% by combination this rotor and a sensible heat exchanger. In addition, the rotor could dehumidify stably in the continuous test for a week.
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Saya NAKABAYASHI, Katsunori NAGANO, Makoto NAKAMURA, Emi NISHIKAWA, Ju ...
Article type: Article
Session ID: D-44
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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The numerical model based on the performance tests on a desiccant wheel, which was developed by using Wakkanai siliceous shale, was presented, and the dehumidification performance was predicted from this model under the several conditions. They showed that the dehumidification amount increased with increasing the diameter, the cell number, and especially the length of the wheel. This wheel's dehumidification amount was estimated as 55% of the required dehumidification amount for the hottest day in Tokyo in 2008. The dehumidification amount of this wheel increased to 89% when a pre-cooling was employed to the system.
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Wataru INABA, Hideo INABA, Akihiko HORIBE, Naoto HARUKI, Kensaku MAEDA ...
Article type: Article
Session ID: D-45
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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This report describes the study of the sorption characteristics of the desiccant block used in the sorptiorrtype air-conditioning system, with the purpose to put this system into practical use. and, developed the simulation program that was able to obtain the same result as this experiments.
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Ryuji USUDA, Ryoichi KUDO, Takashi YACHI, Saburo TOYA, Kazuhiro MIYAMO ...
Article type: Article
Session ID: D-46
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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Based on data from previous report, this report outlines the design techniques of the sorption-type air-conditioning system using the desiccant block.
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Ryoichi KUDO, Ryuji USUDA, Takashi YACHI, Saburo TOYA, Kazuhiro MIYAMO ...
Article type: Article
Session ID: D-47
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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This report shows the results of the case study performed to validate the design technique as per previous report, comparison with existing systems and considerations for commercialization, and, examined the energy conservation studies, then we arranged effectiveness of development and the problem for the practical use of the block type.
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Yosuke TAKIGUCHI, Masaki HASEGAWA, Masanori SUZUKI, Akiyoshi SAITO, Ta ...
Article type: Article
Session ID: E-23
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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We designed and constructed the ventilation system of the dissecting table for decreasing formaldehyde concentration in the gross anatomy laboratory, by using the numerical simulation and visualization of the airflow around the dissecting table. This ventilation system prevents the diffusion of the formaldehyde gas from the dissecting table by covering that in the unidirectional airflow. The performance of this ventilation system was evaluated according to Industrial Safety and Health Act in Japan. As a result, we confirmed that formaldehyde concentration in the gross anatomy laboratory was much lower than the allowable value O.1ppm provided in Industrial Safety and Health Act in Japan.
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Kaori SAKO, Saori NAGATA, Hiroyuki TODA
Article type: Article
Session ID: E-24
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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Asbestos in several building material products was analyzed by scanning electron microscope with energy dispersive spectrometer (SEM-EDS). Usually, the asbestos concentration in building material products is height. Though, building material products of 0.1%more in the concentration of asbestos are restricted as asbestos content building material products now. The quantitative analysis of the standard method is difficult. This report that building material products of the asbestos 0.1% content were able to be analyzed by SEM-EDS. This method is simple because it does not have the preprocess.
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Naoki KAGI, U YANAGI, Koichi IKEDA, Naoya NISHIMURA, Hideki SAITO, Ryo ...
Article type: Article
Session ID: E-25
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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The large-scale buildings for indoor environments are managed under the "Low for Maintenance of Sanitation in Buildings (established in 1970)" in Japan. Although the buildings are managed on the indoor environmental standard, the present status of the management for the buildings of the outside for the law are not clear, for example, smaller than 3000m2 total floor area of office buildings. This study carried out measuring indoor particulate matter, volatile organic compounds (VOC) both in large-scale office buildings and small-scale ones, and investigated the differences of indoor air quality. As a result, the particle matter concentrations and VOC concentration for the small-scale office indoor air were relatively higher level than larger-scale ones. It became clear that the air exchange rates and filter efficiencies in the HVAC systems for small-scale buildings could be affect on indoor environment.
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Haruki OSAWA, Naoki KAGI, U YANAGI, Naoya NISHIMURA, Hideki SAITO, Ryo ...
Article type: Article
Session ID: E-26
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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Japanese large cities have underground areas for various purposes such as shopping malls, restaurants and transport facilities and so on. However, because of those complicated forms and requirements, actual conditions are not fully evaluated. In this study, the way of the maintenance of sanitary environments was examined. This study also reports the measurements of physical conditions, such as temperature, humidity, airflow rate, CO, CO_2, PM and formaldehyde concentrations of 6 underground facilities locate in major cities. As a result, except the relative humidity around 20-50 %RH in winter, the CO_2 concentrations and other measurement items were confirmed to environmental standards mostly.
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Koichi IKEDA, Haruki OSAWA, Naoki KAGI, U YANAGI, Kenichi AZUMA, Hidek ...
Article type: Article
Session ID: E-27
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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The indoor environments in large-scale commercial buildings are managed under the "Low for Maintenance of Sanitation in Buildings (established in 1970)" in Japan. This study aimed at examining the actual status of environmental sanitation and building maintenance of, referring to the nationwide on-site building inspection data base developed by the Japanese Government. The exceeding ratios of environmental standards of CO_2 concentration, temperature and relative humidity were slightly increasing year by year, especially in office and school buildings. The reasons for the tendencies could be caused by the revision of the Low in 2002, which lead to the excessive encouragement of energy saving measures in buildings.
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Masaki TAJIMA, Tadahiko IBAMOTO, Masashi MOMOTA, Haruki OSAWA, Naoki K ...
Article type: Article
Session ID: E-28
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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Multiple data on indoor environment were obtained in order to comprehend about the present state of the relationship between energy conservation methods/facilities and indoor environment in buildings. Trends on nonconforming of relative humidity, temperature, and concentration of carbon dioxide are shown form the results of national surveillance of sanitary inspection in buildings and Tokyo metropolitan government's surveillance of sanitary inspection in buildings are shown.
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Yumi KUGOTA, Tadahiko IBAMOTO, Masashi MOMOTA, Haruki OSAWA, Naoki KAG ...
Article type: Article
Session ID: E-29
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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Data on indoor hygiene environment, employed energy conservation methods and condition of maintain in approximate 450 buildings were obtained with the collaboration with Japan Building Maintenance Association by inquiry survey. Overall trends of use of buildings, aspects of use of energy conservation facilities, trends of indoor air quality and relationship between energy conservation methods and trends of indoor air quality were shown by analysing the data.
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Akira NISHIMURA, Tadahiko IBAMOTO, Masashi MOMOTA, Haruki OSAWA, Naoki ...
Article type: Article
Session ID: E-30
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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By using annual BEMS data of an office building which employs AHUs, indoor temperature and relative humidity are analysed from the view point of transient condition and the Act on Maintenance of Sanitation in Buildings. From the data, trends on temperature and relative humidity, which did not adapt into the Act sometimes, are shown. Especially, relative humidity was often lower than the value indicated in the Act because indoor temperature was slightly high like as approximately 25℃ even in winter.
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U Yanagi, K Ikeda, S Yamazaki
Article type: Article
Session ID: E-31
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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Almost all office buildings are equipped with air-conditioning system now, and air-conditioning systems play an important role on airborne microbial contamination in an office building. In control of indoor airborne microbe concentration, it is indispensable to clarify the airborne bacterial and fungous concentration in supply air of an air-conditioning system. This study mainly reports the results obtained by detailed investigations about airborne bacterial and fungous concentration in supply air of air-conditioning system equipped in 22 office buildings located in Tokyo. Not only Cladosporium sp., Penicillium sp. and Aspergillius sp., but yeasts, Fusarium sp. which are hygrophilous fungi were isolated from supply air by high frequency. Moreover, at the buildings which are not so remarkable contaminated by microbes, it is not so difficult to satisfy the standard value of indoor airborne bacterium and fungus of the Architectural Institute of Japan (AIJES-A002-2005). In other words, when indoor airborne bacterial or airborne fungous concentrations exceed the standard value, it means that a certain pollution source exists in the inside of an air-conditioning system or indoor.
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Makoto Yamaguchi, Koichi Isawa, Satoshi Suzuki, Shoji Tanaka, Hirozi M ...
Article type: Article
Session ID: E-32
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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Biological terrorism and pandemic outbreak such as a new influenza virus or SARS have become a problem. In addition, facilities environment of a high standard included an anti-microbe measure is expected at pharmaceutical plants and food factories. This paper reports the examination of the anti-microbe measure with the chlorine-based chemical in the biological cleanroom and the results of confirmation that the above measure could be used for sterilization in the buildings, and the subjects for future study.
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Hiroshi OKANO, Wei-Li JIN, Hiroaki MOURI, Hideshi SAKAGUCHI, Haruki SU ...
Article type: Article
Session ID: E-33
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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Since there is concern of a hospital infection, using a total heat exchanger for the air-conditioner used in a hospital may be kept at arm's length. In order to clarify the migration risk of the bacteria and a mold bacillus by a rotated type total heat exchanger, we experimented using the floating bacillus in atmospheric air. Also since there was little floating number of microorganism, but the migration rate of bacteria and a mold bacillus was below the detection value.
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Fumihiko SHINODA, Hitomi TAKEUCHI, Hitomi TSUTSUMI, Nobuhiro HIRASUGA, ...
Article type: Article
Session ID: E-34
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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The objective of this paper is working out the calculation model of chlorine dioxide (ClO_2) gas reaction rate constant in visible light by bag method. Experiments were conducted in a thermostatic chamber using a 20L Tedlar (polyvinyl fluoride) bag, which has a negligible adsorptive property against ClO_2 gas. The concentration of ClO_2 gas in the Tedlar bag was measured every one hour for six hours. Air temperature, relative humidity, absolute humidity and light illumination were set as experimental variables. It was found that high air temperature and light irradiation accelerated the decrease of ClO_2 gas concentration; the latter had the greatest influence on the decrease of ClO_2 gas concentration among the conditions examined. A mathematical expression as a function of air temperature and light intensity by fluorescent lamp contribute to ClO_2 gas absorption was proposed to predict reaction rate constant of ClO_2 gas.
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Shin-ichi TANABE, Toshiki ISAHAYA, Takashi ITO, Hitomi TSUTSUMI, Nobuh ...
Article type: Article
Session ID: E-35
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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Airborne infectious diseases such as SARS and pandemic flu are worldwide problem. Spread of infection from infected patients to medical doctors or nurses could be a sever issue. Therefore, it has significant meaning to control the infection risk in medical examination room. The objective of this research is to evaluate the infection risk by the aerosol dispersed due to human cough in a medical examination room. This paper reports the introduction of this research. The human cough simulation machine was developed for this research. This machine was found to be able to simulate human cough well.
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Toshiki ISAHAYA, Takashi ITO, Hitomi TSUTSUMI, Nobuhiro HIRASUGA, Hito ...
Article type: Article
Session ID: E-36
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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In this report, the infection risk was evaluated under the condition with various infection control techniques in the laboratory with the human cough simulation machine. The concentration of CO_2 that imitates the patient's cough was measured near the nose of the thermal manikin assumed to be the doctor. The use of infection control techniques decreased the exposure concentration. Greater effect was achieved using with push-pull type ventilation together. The infection risk was evaluated by not only the concentration of CO_2 but also the trapping efficiency of CO_2.
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Takashi ITO, Toshiki ISAHAYA, Hitomi TSUTSUMI, Nobuhiro HIRASUGA, Hito ...
Article type: Article
Session ID: E-37
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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The objects of this study are to observe the detailed distribution of air velocity and CO_2 (carbon dioxide) concentration which is used as tracer gas of coughed air and to calculate advance conditions concerning droplet dispersion counting on relative humidity and pressure. The full scale chamber where the experiment was conducted was modeled and then the experimental conditions were input. The elaborative mock was achieved. The results of CFD illustrated the high CO_2 concentration area and many tiny droplets were observed near the medical doctor. Hence the infection risk was still high when the medical doctor moves.
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Hitomi TSUTSUMI, Toshiki ISAHAYA, Takashi ITO, Nobuhiro HIRASUGA, Hito ...
Article type: Article
Session ID: E-38
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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Motion of doctors, nurses and patients during the medical examination were observed using motion capture system. Three medical doctors and a nurse examinated subjects simulated patients with 3 levels of symptoms in a hospital. The characteristic of motion of doctors, nurse and patient were reported. Evaluation formula of infection risk was proposed based on the result of motion capture. Infection risk under the different 5 conditions were evaluated using the formula.
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Shoichi MORIMOTO, Norikazu KOBAYASHI, Toshikatsu UEDA, Huaipeng TANG, ...
Article type: Article
Session ID: E-39
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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Medical workers use standard precautions to prevent infection. But standard precautions can't prevent airborne infections. We developed an airborne infection control system of consultation room. We used horizontal push-pull airflow to exhaust patient's cough with droplet nuclei. The push-pull devices can use in a small room. We used 0.5μm dust as alternative droplet nuclei. The concentrations of 0.5μm dust were reduced less than 1/20 when the distance of push-pull devices was 1.5m. Our infection control system can reduce the risk of airborne infection in the existing consultation room.
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Norikazu KOBAYASHI, Shoichi MORIMOTO, Toshikatsu UEDA, Huaipeng TANG, ...
Article type: Article
Session ID: E-40
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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Medical workers use standard precautions to prevent infection. But standard precautions can't prevent airborne infections. We developed an airborne infection control system for a new consultation room. Clean air which was supplied from the ceiling over the medical worker formed unidirectional airflow. Patient's droplet nuclei were exhausted by the airflow. Patient's droplet was shut by a screen. We used 0.5μm dust as alternative droplet nuclei. The concentrations of 0.5μm dust were reduced less than 1/20 by the airflow and the screen. Our infection control system for new consultation room can reduce the risk of airborne infection.
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Yoonkyung KANG, Shinsuke KATO, Minki SUNG, Jounghun KIM, U YANAGI, Kei ...
Article type: Article
Session ID: E-41
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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In this study, we measured sterilization effect on the fungal spores Cladosporium herbarum and Fusarium solani as well as bacteria Bacillus subtilis using microwave oven. Three microwave powers (100W, 500W and 1000W) and five exposure time-steps (5sec, 1Osec, 20sec, 40sec and 60sec) were tested to find the most effective parameters of radiation which could be applied to humidifier filter in air conditioning system. The results showed that the degradation of studied microorganisms differed depending on their strains, power of microwave radiation and time of exposure. The responses of three strains from microwave radiation could be ranked in the following order of sensitivity: B. subtilis >C. herbarum >F. solani. The effect of microwave radiation for three strains were degraded more than 99% at 1000W of microwave power with more than 20sec. These results indicate that sterilization of microwave radiation for this study is potential tool for the control of contamination of harmful microorganisms to humidifier filter in air conditioning system.
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Marina ASAI, Minki SUNG, Shinsuke KATO, U YANAGI, Hiroshi IDA, Masayuk ...
Article type: Article
Session ID: E-42
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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New influenza pandemic had been broken around the world last year. Medical facilities, like hospitals, need to take action on building health. HVAC systems in hospital include all outdoor air system and recirculation air system. Because the latter doesn't need to place air-conditioning machines in ward, it has several advantages, for example, easy maintenance, without harmful effect to patients while filter replacement and so on. On the other hand, it can't be denied that there is fear of infection throughout returned air. Installing ID (In Duct)-UVGI (Ultra Violet Germicidal Irradiation) can become a preventive measure for the fear. In this study, measurements of microbes were conducted in a hospital whose HVAC system had ID-UVGI system. The surface disinfection effect in operating ID-UVGI system was confirmed.
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Mitsuo HARADA, Minki SUNG, Shinsuke KATO, U YANAGI, Jung Hun Kim, Mins ...
Article type: Article
Session ID: E-43
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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The ultraviolet ray's strength distribution by ID-UVGI system in air handling unit was examined by the Ray tracing technique in research 1 in the past, and the bactericidal effect of the UVGI system for the air handling unit was confirmed by forecast ultraviolet ray's strength. The UVGI system was set up on the windward and leeward both sides of the evaporative humidifier that adhered the microorganism in the air handling unit that had been continuously driven for 24 hours in this report, and the UVGI bactericidal effect to the evaporative humidifier was confirmed for about two months.
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Hideki TANAKA, Hideharu NIWA, Hisashi BABA
Article type: Article
Session ID: E-44
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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This paper discussed about results of evaluation experiment for humidification performance and improvement of humidified air cleanliness depends on the evaporative humidifier operation. Four types of operating conditions which were reference case(24hours humidification), compulsory water flow washing(half an hour/day), UV light irradiation and compulsory drying(2hour/day) were assumed. As a result, difference of humidified air cleanliness was not observed on the micro-organism count. However, the number of viable cell count was reduced on the inside wall surface of AHU with the UV condition, and in the humidifier-element with the drying condition.
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Suguru DOSHIDA, Masaki YOSHIOKA, Kyosuke KASHIMOTO, Shintaro YOKOYAMA, ...
Article type: Article
Session ID: E-45
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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We have been developing a new system of both humidifying and sterilization with slightly acidic electrolyzed water for microbial contamination. The present study describes the experimental results in the case of a dropping method of slightly acidic electrolyzed water. We examined the effect of decreasing the airborne microbe in room and ducts when the slightly acidic electrolyzed water was introduced into the humidifying water of the humidifier of the air-conditioning system. Consequently, it was confirmed the effectiveness in the case of a dropping method of slightly acidic electrolyzed water
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Kyosuke KASHIMOTO, Masaki YOSHIOKA, Suguru DOSHIDA, Shintaro YOKOYAMA, ...
Article type: Article
Session ID: E-46
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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We have been developing a new system of both humidifying and sterilization with slightly acidic electrolyzed water for microbial contamination. The present study describes the experimental results in the case of a supersonic wave type humidifying method of slightly acidic electrolyzed water. We examined the effect of decreasing the airborne microbe in room and ducts when the slightly acidic electrolyzed water was introduced into the humidifying water of the humidifier of the air-conditioning system. Consequently, it was confirmed the effectiveness in the case of a supersonic wave type humidifying method of slightly acidic electrolyzed water.
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Masazumi GODO, Takeshi TAKATSUKA
Article type: Article
Session ID: E-47
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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Water droplet containing silver ion was supplied to a vaporizing module of vapor type humidifiers. Silver ion was generated by ion-exchange reaction using silver ion supported by Zeolite. After a long running, the microbes on the surface of vaporizing module and in the drain from the vaporizing module decreased, remarkably. It was considered that the hygienic measure using silver ion was effective for vapor type humidifiers.
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Keisuke KEMMOCHI, HIrofumi HAYAMA, Koki KIKKUTA, Akira FUKUSHIMA, Yuic ...
Article type: Article
Session ID: E-48
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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In recent years, displacement ventilation systems are highly attracted attention because they can realize high ventilation efficiency by utilizing indoor natural convection. The purpose of this study is to verify the effectiveness of displacement ventilation systems equipped in factories. And, in this report, we verify it in terms of indoor environment and energy consumption by an experiment at an existing factory and a model simulation.
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Tatsuya INAGAKI, Toshio YAMANAKA, Kazunobu SAGARA, Hisashi KOTANI, Yos ...
Article type: Article
Session ID: E-49
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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In this study, we propose to use the displacement ventilation as a means of obtaining high indoor air quality. The purpose of the study is to examine the validity of this system. In the previous study, the temperature distribution and contaminant concentration profile in the displacement-ventilated room were figured out. However, the actual sickroom has a partition curtain and it is predicted that the curtain has much influence on the temperature distribution and contaminant concentration profile. This paper shows the experiment results and CFD analysis results to examine the effect of the partition curtain in the displacement-ventilated room.
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Hisao SEIKE, Akira YOSHIDA, Toshihiro NAGAMORI, Yoshihisa KIKUCHI, Tak ...
Article type: Article
Session ID: E-50
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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There are no adequate floor air diffuser which can meet the critical thermal requirement to be installed underneath seats of amphitheater with steps. The purpose of this study is to find such geometry. The authors have investigated the air velocity Contribution around a seat with several newly developed floor diffuser samples with different geometries and confirm the suitable one which can be used in amphitheater.
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Shigeki NISHIZAWA, Daisuke SUMIYOSHI, Masato MIYATA, Takao SAWACHI
Article type: Article
Session ID: F-22
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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Knowledge of the characteristics of air-conditioning system under operation is insufficient, especially in small buildings. In this paper, the characteristics are evaluated in detail from adding measurement equipments around the air-conditioning system in a small building, and the energy efficiency is evaluated from both of the simple monitoring data and the detailed data.
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Naoki AIZAWA, Katsuhiko SHIBATA, Syuji HISAMOTO, Yuji TAYA, Masahiro I ...
Article type: Article
Session ID: F-23
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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We reported about the results of measurement the performance of the combined HVAC system with the central air-conditioning system covered 55% of cooling load and multi-sprit type air-conditioner covered 45% of cooling load in the actual office building. As a result, the following were confirmed. 1) The central air-handling unit mainly cooled the cooling load in October. 2) The possibility of changing the cooling load on the central system and multi-sprit type air-conditioner by changing the each set point temperature was obtained in summer measurement.
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Yuki KIMURA, Koki KIKUTA, Hirofumi HAYAMA
Article type: Article
Session ID: F-24
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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The aims of this study are to verify the performance between before and after installing gas engine driven heat pump air conditioning system on a standard middle scale office building in Sapporo, and to show the present conditions of tenant-based energy consumption and indoor thermal environment. In this paper, we report the evaluation of energy consumption.
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Ippei SUZUKI, Tadayoshi SAITOH, Dan MORITA, Keita SATOH, Hidetaka SEKI ...
Article type: Article
Session ID: F-25
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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The original purpose of control valve in HVAC system is to control amount of heat and its controllability is represented by thermal characteristic. Control valve only controls flow rate which is one of the factors affect thermal characteristic, but other factors also affect thermal characteristic like control method of secondary pump, valve authority, and differential pressure across a control valve. We investigated thermal characteristic in order to clarify the good controllability condition while changing these factors. As a result it shows good controllability conditions that differential pressure across the control valve is lower and secondary pump system is controlled by differential pressure constant control at the end of piping system.
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Yusuke SEKI, Takeshi WATANABE, Shisei WARAGAI, Yousuke MINO
Article type: Article
Session ID: F-26
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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In this report, the performance of the double-skin facades is studied. The comfort and energy efficiency in the building where double-skin facades is introduced are investigated. Then, the influence in double-skin facades on energy efficiency by the window shade installation position is examined.
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Takumi NAKAJIMA, Soichiro OCHIAI, Yuusuke HAGA, Hideki YUZAWA, Takeshi ...
Article type: Article
Session ID: F-27
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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This survey was conducted to investigate the effect of the system for the energy saving on the existing commercial buildings. The investigation objects are 480 existing buildings that analyzing the data of the execution condition report collected from manager of buildings, and arranging the result of energy-saving effects.
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Satoki HOSHINO, Tomohisa TAKEBE, Hiroyuki Someya
Article type: Article
Session ID: F-28
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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These Facilities were constructed as Tochigi Prefectual Public Office Building.They introduce various environmental technologies.This Paper Reports the Operation Results and Evaluation of the Indoor Environment and Methods reduce environmental impact.
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Tsuneyoshi MATSUGU, Yoshiaki YOKOGAWA, Masaki NAKAYAMA
Article type: Article
Session ID: F-29
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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To keep air-quality clean, ventilation is most important thing. The ventilation system has 2 type systems, one is central-system and another is package-system. The central-system can control ventilation rate using CO_2 monitor but the package-system doesn't, because of its high-cost. We have experimented application of low-cost semiconductor sensor to package-system to control ventilation rate. We report the correlation between semiconductor sensor output and CO_2 concentrate, and the result of energy saving by reducing ventilation rate.
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Takuya KISHIMOTO, Hisataka KITORA, Hideharu NIWA
Article type: Article
Session ID: F-30
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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This building in Kobe city was built in 2000 with a concept of "The eco-friendly building with less energy consumption". To achieve this concept, it adopted several energy-saving methods. Initial commissioning after construction showed the high performance of those methods. But Seven years have passed after construction, it is necessary to evaluate the building performance again to find problems and to improve them. In this paper, results of verification of effect on energy leveling by the method of continuous operation of AHU and analysis of the annual energy consumption for 10 years, are reported.
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Tatsuhiko YABARA, Tatsuo NOBE
Article type: Article
Session ID: F-31
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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In this study, we created a database with operation status of building equipment for archived data in IBM JAPAN headquarters building. In this process, review of archive data and investigated was setting time the benchmark. As a result, the author was confirmed the available of archived data and confirmed loss of archive data. The database will be open to the public in the future.
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Minoru Kawashima, Michiya Suzuki, Takuji Nakamura
Article type: Article
Session ID: F-32
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
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An environmental conscious office building was built in Oct. 2003 in Tokyo. The operational data for six years are measured and analyzed. This paper shows the numerical numbers of annual electric consumption, thermal load, primary energy consumption per square meters, gas consumption, water consumption, and LCCO2 per square meters. These data shows us that the the energy conservation in operation has been kept in a good condition.
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Yoshiyuki SHIMODA, Yohei YAMAGUCHI, Mitsuru NISHIYAMA, Atsushi MISE, K ...
Article type: Article
Session ID: F-33
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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The electricity consumption of two office rooms in university campus is measured in detail. The purpose of this measurement is to disaggregate electricity consumption into each appliance and to classify them into 6 services-lighting, office appliances, cooling and heating (Gas engine heat pump), ventilation, hot-water supply and cooking, and sanitary. For this purpose, the relationship between electricity consumption and the specification and operation of the appliances as well as climate condition was analyzed.
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Yohei YAMAGUCHI, Kazuya IMAI, Yoshiyuki SHIMODA, Mitsuru NISHIYAMA, At ...
Article type: Article
Session ID: F-34
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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The authors carried out a field measurement and simulation on the cooling and heating load of two office rooms of in Osaka University. Based on the result of field measurement, it was revealed that a considerable vertical temperature distribution is formed in the conditioned room during winter season. This results in smaller supply of heat than required and discomfort in the room. The simulation model was used to disaggregate the cooling and heating load into its sources. Those of outside walls and windows are dominant in the subject room. These result generally showed the importance of improvement in insulation of outside walls and windows.
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Masaru NAGIHARA, Takaharu KAWASE, Masayoshi YAMAMOTO
Article type: Article
Session ID: F-35
Published: August 12, 2010
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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There is little energy consumption data of small buildings less than 2000m2 in total floor area. Then, this paper shows the energy consumption and the thermal environment of these buildings through field studies for three years. When the data of small buildings investigated this time is compared with the data of large buildings that has already been made public, there are different features in small buildings and large buildings.
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