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Masamitsu SUGANAGA, Shuzo MURAKAMI, Hisaya ISHINO, Tatsuo NAGAI, Hiros ...
Article type: Article
Session ID: OS-18
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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In this paper, the calculations as the case studies were executed with BEST simulation code regarding an individual system of the package air-conditioner and also a central air-conditioning system consisting of air source heat pump chilling unit and air handling unit. As the result, BEST simulation code indicates enough performance for practical use.
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Naoko SHINOHARA, Shuzo MURAKAMI, Yuzo SAKAMOTO, Yasuo Utsumi, Masamits ...
Article type: Article
Session ID: OS-19
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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It is important to offer the GUI to BEST, since it calculates energy consumption of the whole building with a large amount of data and the interconnection among them. This paper introduces a GUI for the professional version where the target of the development is to support multi-users task dealing with various and large data set and to indicate the output efficiently, e.g. in graphical manner. Use case graph is applied in the first stage and four groups of users are assumed. Data consists of 1)building and weather data, 2)building equipment, HVAC, sanitary and electricity. The operating procedure, concrete figures, etc. are following.
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Katsumi NIWA, Chikara SUKEHIRA, Shuzo MURAKAMI, Hisaya ISHINO, Shoichi ...
Article type: Article
Session ID: OS-20
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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Equipment models for the BEST program have been developed. The main theme of this development was the combination of maintenance performance and individual characteristics of equipments. The maintenance performance is important for adding new equipments. For this purpose, we divided the model into performance model and specification table. The performance models are described as physical model or fitting curve model, depending on complexity of the equipments. In the specification table, nominal performance and auxiliary power consumption are defined. In this papa, typical equipment models, i.e. chillers, cooling towers, boilers, fans, pumps and air conditioners, and their modeling concepts are reported.
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Tomoya KAWAJI, Shuzo MURAKAMI, Takashi YANAGIHARA, Kazuyasu GODA, Hiro ...
Article type: Article
Session ID: OS-21
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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This paper describes the outline of program for air conditioning system with thermal storage which was introduced into the BEST. Thermal storage system with heat pump using is considered an effective measure for electrical load leveling and energy conservation. Therefore, the function of calculating thermal storage system was added. The program of thermal storage system was developed based on TESEP-W which was provided by Heat Pump & Thermal Storage Technology Center of Japan.
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Takashi AKIMOTO, Shuzo MURAKAMI, Kenichi SASAJIMA, Hisaya ISHINO, Fumi ...
Article type: Article
Session ID: OS-22
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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For the purpose of applying the BEST to buildings including cogeneration systems, a module of cogeneration system is being developed. Referring existing cogeneration simulation/assessment tools and mainly considering thermal energy balances, the development work is focusing on modeling the gas engine generator, waste heat use absorption chiller, heat exchanger and controllers. Based on the design concept of the BEST, as the first step, a sample system consisting of one-unit of each equipment has been developed adopting "forward method". Additional requirements to be solved have been recognized such as finding a proper calculation flow and/or iteration algorithm for robust simulation.
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So TAKIZAWA, Shuzo MURAKAMI, Takehiro HIEDA, Fumio SAKURAI
Article type: Article
Session ID: OS-23
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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This study aims to develop a calculation tool "BEST", which is able to simulate overall energy consumption of MEP systems. This paper presents the outline of the models of electrical installation in BEST. Lighting systems, electrical power supply systems and elevators are the subject of electrical installation.
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Masayuki OTSUKA, Shuzo MURAKAMI, Naoto OBARA, Akihiro DOI, Kengo KAMEO ...
Article type: Article
Session ID: OS-24
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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The purpose of this study is to develop a calculation tool, which is able to simulate overall energy consumption of air-conditioning systems, electric systems and plumbing systems for buildings. The first report (part4) outlined the framework and system that facilitate especially the development of a simulation tool, which enabled the design of plumbing systems as well as calculating energy and water consumption spent on system operation while contributing to the conservation of energy and water sources. This paper discusses water supply calculation modules, calculation method in these modules and several case study results.
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Masayuki MAE, Shuzo MURAKAMI, Masayuki OTSUKA, Iwao HASEGAWA, Naruji T ...
Article type: Article
Session ID: OS-25
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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This study aims to develop a calculation tool, which is able to simulate overall energy consumption of air-conditioning systems, electric systems and plumbing systems for buildings. This paper outlines the framework and system that facilitate especially the development of a simulation tool, which enables the design of plumbing systems as well as calculating energy and water consumption spent on hot water supply system operation while contributing to the conservation of energy and water sources.
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Hiroyuki KOSE, Shuzo MURAKAMI, Masayuki OTSUKA, Kengo KAMEOKA, Iwao HA ...
Article type: Article
Session ID: OS-26
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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This study aims to develop a calculation tool, which is able to simulate overall energy consumption of air-conditioning systems, electric systems and plumbing systems for buildings. In this paper, the linkage in modules and modular construction is explained on rainwater utilization system made on the basis of water supply system. And, each module and the calculation method are explained. In addition, the calculation result by the difference between water tank capacity and catchment area of each part is shown.
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Makoto KURANARI, Tomoyuki CHIKAMOTO
Article type: Article
Session ID: F-26
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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In this study, it aims to examine human comfort by thermal environment change, and to attempt the application to the air-conditioning control. 2 types of environment change were examined. 1) Shock; thermal shock was given from outdoor to indoor. 2) Adaptive; thermal environment was gradually changed. The physiology of human body and the influence on the comfort were examined in Summer and Winter. The results of 5 minutes Shock and 30 minutes Adaptive seem to be effective in Summer. In addition, the effectiveness was examined in comparing Shock or Adaptive in Summer.
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Kanae ISHIDA, Ayako ONGA, Tatsuo NOBE
Article type: Article
Session ID: F-27
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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This report describes study about motivation for task that affects on thermal sensation and comfort. A comfortable thermal environment was seemed to have been already provided. However, there are still requirements like "too hot" and "too cold" by office workers. Therefore authors hypothesize that motivation for task that affects on thermal sensation and comfort. In this paper, authors report results from subjective experiment
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Chitake KARAKI, Hideaki MATSUHASHI, Yutaka TOCHIHARA, Nobuko HASHIGUCH ...
Article type: Article
Session ID: F-28
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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We are studying the effects of different vertical indoor air temperatures on physiological and psychological responses and working performance. In our previous paper, thermal discomfort rarely occurred in the 'head cool and foot warm' condition. However, it was shown that performance might deteriorate in this condition. The current experiment also used an air-conditioning box in a climatic chamber. Eight male and eight female subjects were exposed to four conditions where the upper part of body was a constant temperature (25℃) and the lower parts were 16℃, 19℃, 22℃, 25℃, respectively. In the 'foot cool and head warm' condition, thermal discomfort occurred more in female subjects than males. The rate of correct answers to a memory search task by females was higher than males at 25℃, but lower at 22℃ or below.
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Tomonori SAKOI, Shinsuke KATO, Ryozo OOKA, Satoru KUNO, Kazuyo TSUZUKI
Article type: Article
Session ID: F-29
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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The two axes of the Two-Dimensional Thermal Sensation Model proposed by Kuno are "Ambient condition" and "Physiological condition". This paper describes the process to transfer these axes to "Mean body temperature, Tb" and "Heat storage term to the human body, St". In order to establish the Two-Dimensional Thermal Sensation Model with the new axes, it is essential to estimate Tb and St". An example of estimated transient Tb and St is indicated for daily situation.
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Hitomi TAKEUCHI, Yuta EZAKI, Hitomi TSUTSUMI, Junkichi HARIGAYA, Shin- ...
Article type: Article
Session ID: F-30
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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Subjective experiments were conducted in a climate chamber in order to evaluate human comfort under the transient condition due to cyclic air temperature swing at the constant absolute humidity. Eight subjects of both genders were exposed 2 cycles of 1-hour temperature swing. Two levels of absolute humidity were set at 28℃, 4.20g/kg(DA) and 11.82g/kg(DA). For each absolute humidity, 3 types of air temperature swing, ±3.5℃, ±1.7℃, ±0℃, were examined. Swing at low humidity caused lower thermal sensation and greater pleasantness than at high humidity during temperature decrement. Subjects reported greater dryness sensation at low absolute humidity under the condition with temperature swing condition. Subjective humidity discomfort was mild even at low absolute humidity during air temperature swing.
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Suguru HIROTA, Takafumi MAEDA, Shintaro YOKOYAMA, Masashi KURAMAE
Article type: Article
Session ID: F-31
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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The purpose of this study is to investigate the influential factors on sweating response during heat exposure. We performed experiment to examine sweating response. Sweating rate, mean skin temperature, etc were measured in twelve males during immersing their legs into a hot water (42℃) for 30 min. Local sweat rate and onset threshold for sweating have a large variation. Secondly, we measured their acceleration plethysmogram, the maximal oxygen uptake (Vo_2max) and investigated their lifestyles. There was a relationship between onset threshold for sweating and Vo_2max. The results revealed that daily exercise has affected sweating response.
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Satoshi AMEMIYA, Kouhei KUWABARA, Hideki KUBOTA, Yasuhiro HAMADA, Mako ...
Article type: Article
Session ID: F-32
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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We propose a new model for predicting heart rate and core temperature in hot environment considering individual cardiorespiratory capacity by applying our human model for predicting mean skin temperature. Core temperature as well as heart rate is defined as the function of exercise intensity and thermal stress expressed by deviation of mean skin temperature from that of thermal neutrality. Core temperature and heart rate begin to increase at a critical mean skin temperature; we have identified these critical values by using data from our experiments and literatures.
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Kouki IKEDA, Kouhei KUWABARA, Hideki KUBOTA, Satoshi AMEMIYA, Yasuhiro ...
Article type: Article
Session ID: F-33
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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The aim of this research is to protect workers and exercising people from heat disorders by applying hour human model for predicting body temperatures (both core and mean skin temperature), sweating rate and heart rate. In this paper, we compared the reference values of the WBGT heat stress index in ISO-7243 with rectal temperature of 38 degrees C predicted from our human model on temperature-humidity chart, and evaluated the validity of the WBGT index.
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Shohei MORIMOTO, Akira KATO, Masashi KURAMAE, Takafumi MAEDA, Shintaro ...
Article type: Article
Session ID: F-34
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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A heat source for heating is short by car in the next generations such as battery cars. The development of the car heating system that is energy saving is expected. Therefore, we aimed at the establishment of the new car heating system. We used the seat with a built-in heater and the foot heater at -10 and 10 degrees Celsius. As a result, the skin temperature falls and the blood pressure rises by the cold exposure were restrained by using these heaters. In addition, thermal sensation and comfortable were improved.
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Tomofumi KAWASE, Takashi KURABUCHI, Yukari IINO, Ken FUKADA
Article type: Article
Session ID: F-35
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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On site survey of thermal and air quality environment of elementary school classrooms equipped with air-conditioning system for cooling was performed based on temperature and CO_2 concentration measurement and questionnaire research. It was found that choice of ventilation and air-conditioning system was highly dependent on classes at the beginning of summer, CO_2 concentration was kept acceptable level even when air-conditioning system was operated because corridor side door was usually opened, and pupils' preferred temperature was well explained by adaptive model for naturally ventilated buildings.
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Osamu NAGASE, Shinji YAMAMURA
Article type: Article
Session ID: F-36
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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A more excellent heat environment is requested at the residence region level in the object district in the development of the district plan, the redevelopment project, and the residential quarter. That is, needs for the cool spot formation are rising. To examine the design support that easily understood the space shape and the material that contributed to the cool spot formation, an existing large scale development project was investigated. Concretely, it took a picture of the thermography and the temperature analysis was done.
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Shinji Yoshida
Article type: Article
Session ID: F-37
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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This paper investigates a new method incorporating inhomogeneous environmental conditions into the method coupled with CFD analysis and multi-fractional human thermoregulation model for evaluating the outdoor thermal environment. The new method can evaluate distributions of absorbed solar and long-wave radiations from around the human body, and also evaluate effects of airflow on distributions of heat transfer coefficient and clothing insulation on human body. A future direction of this study will be to evaluate effects of the new method mentioned above by the practical analysis.
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Masahiko KANEDA, Daisuke NARUMI, Yoshiyuki SHIMODA
Article type: Article
Session ID: F-38
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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Recently, the heat environment of summer in urban area has deteriorated remarkably by the heat island phenomenon and global warming. This study aims to create the useful database in the block planning which is conserved for these two thermal environmental problems. Therefore, we evaluated the impact of building shapes and arrangements of surrounding buildings on outdoor heat environment and air-conditioning energy consumption by CFD simulation and thermal load calculation.
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Keisuke TAKEBE, Tomoyuki CHIKAMOTO, Taichi NISHITANI, Hiromasa YAMASHI ...
Article type: Article
Session ID: F-39
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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The goal of this study is to establish the analysis system of the actual urban area. This study aims to devise an urban design that is improvement of the thermal environment for pedestrian by heat island mitigation. This paper shows the result of a verification of the CFD condition by a wind tunnel experiment on the Midosuji Street in Osaka.
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Masaki NAKAO, Tomoko HASEGAWA, Minako NABESHIMA, Masatoshi NISHIOKA
Article type: Article
Session ID: F-40
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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Although by moving measurement method for urban thermal environment we can obtain the data of much more spatial points than fixed point measurement method, time lag of each sensor causes the measurement error in the space distribution. In order to decrease the measurement error, we formulate a moving measurement model with two parameters which are the time constant of each sensor and the speed of the vehicle and introduce the error compensation system from the model. Field
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Haruhiko SATO, Shuzo MURAKAMI, Ryozo OOKA, Yoichi KAWAMOTO, Taiki Sato
Article type: Article
Session ID: F-41
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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The authors have made a thorough study of what sort of countermeasures can be taken to mitigate the heat island effect by using the evaluation method of the sea breeze effects on urban thermal environment. As the result, the implementation of the countermeasure in the central area of Tokyo has a great effect on reducing exhaust warm air at there and increasing the influence of sea breeze at the inland. These results show the effectiveness of the countermeasures for improving the urban thermal environment of inland in daytime of summer.
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Natsu TERUI, Daisuke NARUMI, Akira KONDO, Yoshiyuki SHIMODA
Article type: Article
Session ID: F-42
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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In order to develop measures that effectively mitigate urban heat island phenomenon, a simulation model capable of predicting urban thermal climate precisely must be developed. This paper analyzes sensitivity of estimated air temperature in a meso-scale climate model to how anthropogenic heat is released. The result showed that the total amount of heat release from the residential, transportation and industrial sectors, the pattern of heat release from the residential and industrial sectors, the height of the industrial sector have a significant influence on air temperature during night and early morning while atmosphere is stable.
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Mie OHYAMA, Hisaya ISHINO, Satoshi NAKAYAMA
Article type: Article
Session ID: F-43
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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The heat island phenomenon in the metropolitan area keeps increasing, and the necessity of the city planning that considers decreasing the environmental load has risen while the thermal environment deterioration of the city progresses. The local climate analysis that uses the numerical model can be mentioned as one of these examination techniques. It aims to do the simulation analysis that uses detailed landuse data as a local climate analysis intended for summer in the metropolitan area in this research, and to forecast the effect of concrete heat island measures technique in the city planning in the future.
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Daisuke NARUMI, Hiroshi NAKASHIMA, Yoshiyuki SHIMODA
Article type: Article
Session ID: F-44
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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The purpose of this study is to propose the new scenario of urban planning considering both of heat island mitigation and energy conservation at the target for the real blocks. In this report, we explain the evaluation method for the heat island thermal load and energy consumption by using numerical model. And in the next report, we estimated the potential effect of the heat island mitigation and the amount of CO2 reduction in each scenario.
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Hiroshi NAKASHIMA, Daisuke NARUMI, Yoshiyuki SHIMODA
Article type: Article
Session ID: F-45
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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In this study, we propose a new urban planning considering both of heat island mitigation and CO2 reduction. We estimated the potential effect of the heat island mitigation strategies at block level by using numerical model. We also evaluated the amount of CO2 reduction in each scenario. And we also organized a workshop in which we discussed about scenarios with inhabitants, and after that we made a new scenario in mind inhabitants' opinions.
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Yasunori MIKI, Daisuke NARUMI, Yoshiyuki SHIMODA
Article type: Article
Session ID: F-46
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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One of the cause of rising temperature in urban cities is the weak connection of water and heat. To evaluate the present condition, we drew flow charts about energy-water combined metabolism. From the flow charts, we detected the problems and room of improvement especially in commercial sector. Next, we classified grid cells in Osaka into 9 classes by cluster analysis whose indicator was about radiated heat. From the result of classification, we showed the capability of evaluating where to introduce countermeasures and what to introduce countermeasures.
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Kentarou SHIGEMATSU, Yasunori MIKI, Daisuke NARUMI, Yoshiyuki SHIMODA
Article type: Article
Session ID: F-47
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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Now, technique for evaporation cooling is receiving increasing attention as heat island mitigation strategies. In this paper, we conducted several technique spraying mist on public housing. Then we simulated that the techniques were conducted on all over the public housing. When we evaluated the effects of reducing cooling energy and the atmosphere sensible heat load by the technique through the result of experiment and simulation, we understood that the technique for evaporation cooling are effective in reducing cooling energy and the atmosphere sensible heat load.
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Hiroshi SAITO, Takashi INOUE, Yoshihito SAKAMOTO, Hisaya ISHINO, Masay ...
Article type: Article
Session ID: F-48
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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The heat island phenomenon and urban thermal environmental degradation have become serious problems. It is noted that high reflectance paint with high reflectance ratio of near-infrared range is applied to buildings. In this paper, the conventional type high-reflective panel and newly developed baking finishing high-reflective panel were selected for test samples. In this study, the outdoor exposure experiment and accelerated weathering tests about durability were performed in order to verify the long-term performance. The result showed that the baking finishing high-reflective panels were better than conventional panels.
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Atsushi MIYAMOTO, Takashi INOUE, Yoshihito SAKAMOTO, Hisaya ISHINO, Ma ...
Article type: Article
Session ID: F-49
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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This paper reports the long term spectrum characteristic of each test sample measured by spectral radiometer. It was indicated that baking finishing and photocatalyst coating panels could maintain initial performance over a long period compared with conventional panels.
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Masakatsu Fukuda, Akikazu Kaga, Akira Kondohu, Yoshio Inoue, Kaoru Ike ...
Article type: Article
Session ID: F-50
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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View factor is needed to solve heat transfer problem accompanied with heat radiation. Pyramid projection method (PPM) 〓 calculation view factor by using computer graphic technology was already developed. The calculation speed of view factor by PPM was 10000 times faster than the calculation speed by Monte Carlo Method. PPM calculated view factor and it was applied to calculate heat radiation and set* in road side tree. It was confirmed that PPM accurately calculated view factor of complicated tree structure.
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Masashi FUJITA, Koji YAMANAKA, Haruyo SUZUKI
Article type: Article
Session ID: G-1
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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We have developed a ventilating outdoor air purification system for household use featuring water as a cleaning medium. The system has demonstrated excellent performances in reducing particulate matters including pollens and airborne molecular contaminants, such as NOx and NH_3 which are hard to be removed by a conventional filter type air cleaner. Besides those air purification abilities, the system is equipped with humidity control and sterilizing functions, which are essential especially for house use. It is also confirmed that those functions work properly to keep the purified air comfortable and free from microbial contamination.
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Mine SUDO, Minki Sung, Shinsuke KATO, Shuu YOSHIDA, Fumie KAWANAMI
Article type: Article
Session ID: G-2
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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The purpose of this study is to development the high-efficient air purification system with photocatalyst. This paper presents the relations between the chemical removal-efficiency and PCO unit structure or air velocity. It was found using CFD simulation that the most efficient unit among the cases considered had a structure like a chamber. And PCO unit works efficiently with comparatively low air velocity of 0.1m/s. There is room for consideration, as air-conditioning systems need higher air velocity.
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Atsuo NOZAKI, Haruki SAKURABA, Masaya SHINOTSUKA, Yusuke ICHIJO
Article type: Article
Session ID: G-3
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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It is of concern that chemical substances emitted from materials used to construct air cleaners, such as plastics and glue, may cause indoor air pollution. The present report aims to investigate the following two points: 1) To develop a room air cleaner which attempts to decrease chemical substance emission with high removal performance. 2) To quantify the formaldehyde, VOC and odor removal performance of this air cleaner.
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Atsuo NOZAKI, Yusuke ICHIJO, Yasunori NARITA
Article type: Article
Session ID: G-4
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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The "Enforced Building Standards Act" was revised in July 2003, which required the installing of continuous ventilation systems in residential housing. However, the chemical substance removal performance of the gas removal devices installed with continuous ventilation systems is generally poor. Therefore, in the present study, physisorption materials and chemical absorbents were used with the objective of developing a high-performance gas removal device with additional chemical substance removal performance. As a result, the formaldehyde removal performance (CADR [m^3/h]) of the gas removal device was 52.1[m^3/h] and its VOC CADR was 38.0[m^3/h]. These results show that the modified device is more effective as an indoor countermeasure product.
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Atsuo NOZAKI, Masaya SHINOTSUKA, Haruki SAKURABA, Yusuke ICHIJO
Article type: Article
Session ID: G-5
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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Health damage by formaldehyde and volatile organic compounds (VOC) emitted from construction materials and daily necessaries are an important social issue. Room air cleaners are expected to be an effective technological countermeasure, and technologies, previous studies have shown that air cleaners are indeed effective against indoor air chemical pollution. However, the durability of their chemical removal performance is unclear. This report aims to clarify the durability of chemical removal performance of room air cleaners and to propose the optimum time between instances of filter cleaning.
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Atsuo NOZAKI, Yasuhiro HASHIMOTO, Yusuke ICHIJO
Article type: Article
Session ID: G-6
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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The chemical adsorption performance on these activated carbons under the same test is still unknown. In this study, we aimed at determining the removal performance of chemical substances on the activated carbon filter. The performance was expressed by the index of clean air delivery rate or CADR[m^3/h]. Results showed that the VOCs CADR derived by our experimental method was ranged from 17.9 to 45.4[m^3/h] during its initial operations
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Saya NAKABAYASHI, Katsunori NAGANO, Makoto NAKAMURA, Junya TOGAWA, Tom ...
Article type: Article
Session ID: G-7
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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This study aims at development of an inorganic filter for air-conditioning by using Wakkanai siliceous shale. To improve water adsorption ability, deliquescent solutions were supported on siliceous shale. Authors have evaluated the maximum supporting amount according to surface's wetted conditions. It was evaluated that these supported materials, particularly supported by lithium chloride, had a good ability for water adsorption under low or middle humidity condition from vapor adsorption isotherm and long-term cyclic test of adsorption and desorption. Furthermore, air circulation using a packed-bed verified that LiCl-supported siliceous shale can absorb moisture and be regenerated by circulation of relative low temperature air.
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Akihisa TAKEMURA, Kazunobu SAGARA, Toshio YAMANAKA, Hisashi KOTANI, To ...
Article type: Article
Session ID: G-8
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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It is necessary to use a lot of subjects on the odor sensory evaluation test because the evaluation results vary widely among individual. However the preparation of many subjects might be difficult. In this paper, n-butanol was adopted as the test odor and the odor flask method was used as test method, and odor intensity, hedonics, preference and acceptability were evaluated by sixty subjects. Consequently, it was investigated that sixty subjects' evaluations of one time were compared with those of ten times by the six subjects in order to try substituting sixty subjects' evaluations for those by six subjects.
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Toru FUJIMOTO, Kazunobu SAGARA, Toshio YAMANAKA, Hisashi KOTANI, Akihi ...
Article type: Article
Session ID: G-9
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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In order to measure odor, olfactory measurement by subjects is generally used, because olfaction is influenced by the various factor as temperature, humidity and psychological aspect. The odor quality is evaluated by rating scale of olfaction. Some evaluation scales have used in the odor evaluation experiment. In this study, therefore, we focused on 7 scales of intensity and 3 scales of hedonics, for example the rating scale which Ministry of the Environment in Japan uses for odor regulation. We intend to recognize the psychological distance between each word. The relation in rating scale of olfaction is revealed.
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Hiroyuki MIYAUCHI, Takaaki MURATA, Masahiro NAKAZA, Shun-ichiro IMAMIY ...
Article type: Article
Session ID: G-10
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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When a bad smell level of a workshop rises, stress with a comfortable degree lowers, beginning work, a cause of fatigue, work efficiency is fallen. The measurement in real time of the bad smell on personal exposition level expresses a change of the bad smell level that a real worker feels. This method is useful for a search of bad smell outbreak source, evaluation of a bad smell exposition risk, in addition, this method helps effective work environment improvement.
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Gentaro TAMAKI, Go IWASHITA, Junko NAKAGAWA
Article type: Article
Session ID: G-11
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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The impact of the air pollution caused by human bioeffluents on the occupants' perceived air quality was studied in two different thermal conditions, i.e., warm condition (28℃), and neutral condition (25℃). Fatty acid VOCs, which could be one ingredient of bioeffluents, were identified and quantified in the room air. The concentrations of the fatty acid VOCs in the warm condition were higher than those in the neutral condition. The CO_2 production from the occupants was calculated by using the CO_2 concentration and the ventilation rate for each thermal condition. No significant difference in CO_2 production per one occupant among different experimental conditions of temperatures was found.
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Yuki TAKAHASHI, Yasushi KONDO, Go IWASHITA, Hajime YOSHINO, Shunsuke O ...
Article type: Article
Session ID: G-12
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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In commercial kitchens, problems due to indoor air quality often appear and may reduce work productivity. Especially odor may cause serious IAQ problems and also makes some trouble with neighbors. However, odor problems have been studied only by experimental method and detail of distribution of odor index has not been examined. In this study, generation rate of odor material was measured in an experimental room. Then CFD simulation was conducted with the measured generation rate, and the concentration of odor material was simulated to obtain the odor index distribution.
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Takashi NAKAMURA, Hiromi KOMINE, Hiroshi KIMURA, Jun-ichi KITA
Article type: Article
Session ID: G-13
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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The evaluation for deodorizing effects of deodorant building materials was conducted. Stable exposed smell condition was confirmed with the artificial smell generator invented in this study. The Electronic Nose was recognized as quantitative analyzer for deodorizing effect. Some consideration was revealed that fully curing was necessary for plastering materials, odor index measured by Electronic Nose was remarkably influenced with alcohol or organic solvents.
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Atsuo NOZAKI, Kiyoaki HONDA, Hisato NISHINA
Article type: Article
Session ID: G-14
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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As a measure for the odor pollution that occurs in the restroom space, toilet units with an air cleaning device are marketed. To clarify the capability of odor material removing performance on this product, an object which makes odor is necessary to be used. In the present study, we clarify the actual condition of odor and VOC emission rate by the experiment with a environmental test-chamber. Also, present study is aimed at the experiment to inspect the reenactment method of the odor material emission by developing a gelatinous para-filth that emits constantly.
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Atsuo NOZAKI, Hisato NISHINA, Kiyoaki HONDA
Article type: Article
Session ID: G-15
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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The odorants in the average living room are mainly emitted from garbage, human excretion and cigarette. The present study aimed at examining and evaluating a method for measuring odors released from toilets by using an environmental chamber, and determining performance of different methods of deodorization on this toilet by this proposed method. Methyl mercaptane concentration ranged from 6.90 to 22[μg/m^3] during fecal release. Ammonia concentration ranged from 4.48 to 40.4 [mg/m^3] during model of human wastes. The odorant reduction rate of the deodorization devices ranged from 28 to 60[%] for methyl mercaptane and from 47 to 63[%] for ammonia.
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Atsuo NOZAKI, Aya KIKKAWA, Hisato NISHINA
Article type: Article
Session ID: G-16
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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Indoor air pollution by odorants is an important problem relating to the comfort for occupants. This problem is particularly important regarding nursing homes for the aged. At the present time, air fresheners are commonly used as a countermeasure to reduce the concentration of airborne ammonia and hydrogen sulfide, but there has been no quantitative scientific research related to their odorant removal performance. The present study proposes testing evaluation methods of odorant removal performance for spray-type air fresheners. Ammonia removal performance of spray-type air fresheners was also determined using same method.
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