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Yuji TSUBOTA, Masayuki KASAHARA, Kazumi NAKAYAMA, Yoshikazu HAZAMA
Article type: Article
Session ID: E-12
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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Thermal behavior of the dwelling is deferent according to the peripheral environment. In order to realize the thermal influence of the plants such as leaves of trees and loans, we have measured the surface temperature or surrounding air temperatures of trees since 2005. In this paper we describe the calculation methods of radiant heats of the each wall of the dwelling. We suppose two types of dwellings; one is located in suburban area, the other in downtown. Calculation parameters are as follows; wall insulation, type of glasses, tree location, garden materials and so on. We calculate the surface temperatures in summer daytime and the skin loads and cooling loads of the dwelling. When the dwelling located in suburban is surrounded trees of 6m tall, the daytime cooling load is reduced several percents than that of non-tree dwellings.
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Masakazu SAKURAI
Article type: Article
Session ID: E-13
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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〓alling of function causes room air temperature, we have analyzed the natural draft affected on room air temperature for underground space. The temperature fluctuates throughout nighttime, By applying methods of measure, we discovered a temperature fluctuates that the natural convection is a cause of fall temperature for underground space. These findings suggest that a preliminary check of the temperature fall effect in the design process of openings for underground space.
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Satoshi NAKAYAMA, Hisaya ISHINO, Noriyoshi ICHIKAWA
Article type: Article
Session ID: E-14
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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We investigated the regional characteristics of the precipitation by use of Expanded AMeDAS Weather Data and Observational Data. At first, we made the maps of precipitation distribution in summer and winter, and represented the regional characteristics. And we proposed the hazard map for the drought crisis by annual precipitation. Secondly, it was denoted a relationship that rainfall continuative tense, total and maximum precipitation in term by Observational Data at Tokyo Metropolitan University. It were described that almost of rainfall continuative tense time are less than 3 hours, cloudburst rainfall are not so long-continued state, all most of precipitation are less or equal then 20mm/h, and so on.
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Hisaya ISHINO, Satoshi NAKAYAMA, Shizuka NISHIDA
Article type: Article
Session ID: E-15
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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Recently, architectural materials that considered solar spectral irradiance are increasing. Therefore it is important to know Solar Spectral Irradiance to figure out the effect of energy conservation accurately, when we use them. But it is few the observation point concerning the solar spectral irradiance, so actual measured data is lacking. Then we organized the solar spectral irradiance measured in Tokyo Metropolitan University, and made estimate equation for solar spectral irradiance from global solar radiation.
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Siqiang LU, Kazuo EMURA, Norio IGAWA
Article type: Article
Session ID: E-16
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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This paper compares the developed weather data of Beijing by the different organizations. The main elements while the temperature, the solar radiation and the humidity are took out and compared in the statistics. And by studying the source data, interpolation, solar radiation model and the composition of typical meteorological year of the several data sets, to discuss the data sets from the quality.
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Lei YUMOTO, Tatsuaki TANAKA
Article type: Article
Session ID: E-17
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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The inside wall of the wooden dwellings by the two-by-four method were simulated by transient analysis to illustrate the effect of damp proof membrane and type of insulation materials. The seven cities were selected each area segmented under the Energy Saving Standard 1999. In Asahikawa, Hirosaki, Nagano and Tokyo, the wall without the membrane were humid in winter. However in Naha, very hot humid area in Japan, the membrane caused high humidity in summer. In Kumamoto and Miyazaki, the wall needs both it and wood fiber insulation board. The former prevents the humidity in winter, and the latter in summer.
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Hiroshi NOGUCHI, Shuichi HOKOI, Daisuke OGURA
Article type: Article
Session ID: E-18
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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The purpose of this study is to clarify the hysteresis effect of sorption isotherm and moisture conductivity on condensation and evaporation behavior of building porous material. We have already investigated behavior of moisture content measured by γ ray attenuation method in the experiment that periodically repeated condensation and evaporation. In this report, we propose a model of hysteresis of moisture conductivity and try to replicate the experimental results that periodically repeats condensation and evaporation using the coupled heat and moisture transfer equations considering the hysteresis of sorption isotherm and moisture conductivity.
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Hideki SHIBAIKE
Article type: Article
Session ID: E-19
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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The energy conservation and the improvement of the indoor hygrothermal situation established by the proposed recommendation on exterior insulation have been validated successfully by using "WUFI Plus 1.2". Quantitative comparisons have been made for three kinds of thermal insulation practices interpreting recommendation of the Proposed and the MLIT (Mar. 1999) located in six representative cities (Sapporo, Morioka, Sendai, Tokyo, Miyazaki, Naha) over the Japanese Archipelago. In order to improve benefits on adopting the proposed recommendation for a city in hot and humid climate region such as Naha, prevention strategies against the overheat by internal heat generation and solar heat gains as well should be focused precisely in the future with highly insulated exterior insulation envelopes.
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Hiroki TAKAHASHI, Shinsuke KATO, Hideaki NAGANO
Article type: Article
Session ID: F-1
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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We have started to study the indoor physical environment affecting the state of occupants' mind, especially reactive depression and performance of creativity. In this paper, we review psychiatric researches and psychological studies, which have linkage with reactive depression and/or performance of creativity. A trial experiment with three different thermal environments was performed employing both Sudoku (Number Place) as an evaluating tool of creativity and the arithmetical performance test as an evaluating tool of productivity. Some subjects had a different trend of performance between Sudoku and the arithmetical test.
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Ayako ONGA, Tatsuo NOBE
Article type: Article
Session ID: F-2
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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This paper reports the worker's requirements for the thermal environment. A comfortable thermal environment was seemed to have been provided. However, the requirements for "too hot" and "too cold" from the workers were still asked. Even if the thermal environment was maintained comfortable, the worker's requirements were declared.
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Tsuyoshi UENO, Yukio NAKANO
Article type: Article
Session ID: F-3
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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Reducing energy demand is one of the most important problems. However, to promote energy saving in office buildings while keeping office worker's benefit, it is important to know the adoption rate of the energy-saving activities and the worker's consciousness to the energy-saving activities. This paper describes the worker's consciousness to the energy-saving activities based on the web questionnaire survey.
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Futoshi MIHASHI, TAKAHARU Kawase, Tamio ITO, Aiko MORIKI, Masao MASUDA
Article type: Article
Session ID: F-4
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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Cool Biz is the light attire campaign waged mainly by the Ministry of Environment for the purpose of environmental protection. The room temperature is recommended 28℃ in Cool Biz office. But this temperature is not so comfortable in the room with little air current. Air current is necessary to gain a feeling of cool in temperature 27-28℃. This paper describes the comparison of the thermal comfort in the area with or without the diffuser's corn, and comparison of energy-consumption by actual measurement in an office with the multi zone air-conditioning system.
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Takuya TANAKA, Kosuke SATO, Yuzo SAKAMOTO, Hideharu NIWA
Article type: Article
Session ID: F-5
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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We surveyed on indoor thermal environment for the building with the packaged air-conditioning system. As a result of measuring a space in one office, we obtained data of the thermal environment in occupant zone and around air conditioner in winter. We found some problems from this data for the thermal and humidity environment. We considered that cause and came to propose the improvement plan. After this, it is necessary to construct a more efficient assessment models.
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Kyohei OTA, Yasushi KONDO, Yasuhiro NAGASAWA, GUOHAI Xu
Article type: Article
Session ID: F-6
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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Under floor air conditioning system (hereafter UFAC) has become popular in Japan, because it is effective to save energy for HVAC. However UFAC may cause uncomfortable drought due to unsuitable layout and/or inadequate supplied air velocity of air diffuser. In order to resolve such problems, airflow and temperature distributions should be predicted precisely. In this paper, CFD modeling of air diffuser for UFAC is studied based on measured data. The simulated indoor environment by CFD with air diffuser model is compared with the experimental results and good agreement is confirmed.
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Yasushi KONDO, Kyohei OTA, Yukiko ABE, Yasuhiro NAGASAWA
Article type: Article
Session ID: F-7
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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Several types of ceiling air diffuser form the attached air jet along the ceiling which diffuses throughout a room. However, if the layout of supply openings and exhaust ones is not appropriate, the short circuit between them appears and ventilation/air-conditioning efficiency becomes very low. In this paper, CFD simulation method of Short Circuit is examined and effect of short circuit on indoor thermal environment and IAQ is studied.
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Atsushi NAKAMURA, Shinichi YONEKI, Kuniharu SASAKI, Kazuaki IIJIMA, Sa ...
Article type: Article
Session ID: F-8
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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This paper reports the measurement results of thermal environment in summer with the inclined ceiling at office perimeter area. And examine about the behavior of interior air conditioning system in according to supply air temperature of air barrier system.
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Naoya MATSUKI, Ryoichi KAJIYA, Koji SAKAI, Ryutaro KUBO, Toshihiko SUD ...
Article type: Article
Session ID: F-9
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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The floor supply displacement air conditioning system makes the uniformly temperature and air flow distribution in the occupied zone. And the perimeter-less system can reduce heat load of perimeter zone. In this report, about the effect that a perimeter-less air conditioning system reduced the perimeter heat load in the winter season, discussed by the CFD analysis.
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Banri TAKADA, Toshikatsu UEDA, Nakaji HONDA
Article type: Article
Session ID: F-10
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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The comfort cannot be maintained even if it controls at the air-conditioning recommendation temperature in the office where the influence of solar radiation is greatly received int the day time. We would take the air-conditioning control that the man's request and comfort coexist. In this paper, the PMV value is calculated and the program that controls PMV is made. The effectiveness of the PMV control to the comfort in the office is verified by comparing it with the temperature control. CFD was used for the verification
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Keisuke EMOTO, Kazunori MATSUMAE, Shin-ichi KAGIYA, Takashi AKIMOTO, Y ...
Article type: Article
Session ID: F-11
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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There are so many ways of use for heating equipment at home. The suitable way of use is depending on the posture, place of occupants, the surface of floor, and also air tightness and insulation performance of rooms. The occupant survey was performed in the living room of the case study house. Under the same thermal comfort condition, the operative temperature of the floor heating system was lower than that in the case of the electrical heat pump. The difference of thermal comfort voted by subjects was not seen either with or without rug set on the floor.
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Shin-ichi KAGIYA, Yuzo SAKAMOTO, Yasuo KUWASAWA, Hisashi MIURA
Article type: Article
Session ID: F-12
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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Experiments has been executed at existing reinforced concrete multiple dwelling houses to clarify the effects of thermal insulation and airtight retrofit. The effects of improvements on indoor thermal environment with different heating apparatus (EHP and floor heating system) have been obtained. And the energy saving performance with the different heating apparatus has been obtained too. It has been found that thermal insulation retrofit of floor has almost the same effect as thermal insulation retrofit of wall and window.
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Shin-ichi TANABE, Shin-ichi KAGIYA, Kazunori MATSUMAE
Article type: Article
Session ID: F-13
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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In this experiment, the thermal comfort and heat input for heating systems (floor heating and air conditioner) based on thermal manikin measurement were compared. The experiment for the thermal manikin was performed in the artificial climate chamber. In that chamber, for floor heating and air conditioner the experimental condition was chosen as 18/20/22/24℃ for preset temperature, 5℃ for outside air temperature. In the result, the air temperature by floor heating was lower than that by air conditioner under the thermal neutrality. About heat input under the thermal neutrality, floor heating was 880W and air conditioner was 1354W.
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Hiroyuki SHIMIZU, Takashi KURABUCHI, Shizuo IWAMOTO, Ryoichi KAJIYA, K ...
Article type: Article
Session ID: F-14
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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Heat demands are measured to maintain thermal sensation of various points in a room whose heat loss coefficient is 3.2W/m^2K at a comfort level based on PMV value for each heating equipment of floor heating and air-conditioning system. It was confirmed that heat demand of floor heating system is 16% smaller at a height of 600mm or more than air-conditioning system, and uniformly distributed in the occupied space. Average air velocity and its fluctuation are generally higher in air-conditioning system than floor heating and draft risk is found higher in air-conditioning system.
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Kodai HIRUTA, Ryoichi KAJIYA, Koji SAKAI, Takashi KURABUCHI, Shizuo IW ...
Article type: Article
Session ID: F-15
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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This study shows the result of on measurement experiment and CFD analysis in a room of real large residence which meets a new energy saving standard in the fourth area to clarify indoor thermal comfort. A last report was grasp of thermal environment and current of air environment in a room by experiment. This sentence, which is aimed for establishment of the examined for the comfort prediction technique of a room by the CFD, examined for the plasticity by the comparison with an experiment and CFD and deliberated about thermal comfort in a room by CFD mainly.
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Takeshi OGASAWARA, Takashi KURABUCHI, Shizuo IWAMOTO, Ryoichi KAJIYA, ...
Article type: Article
Session ID: F-16
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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A technique was developed to configure mesh system using trimmed mesh in computational thermal manikin and applied for evaluation of nonuniform thermal environment. Reliability of the method was checked through comparison with available data and sufficient mesh resolution to reproduce actual thermal environment was studied by grid dependency test. Thermal manikin was then applied to estimate sensible heat loss ratio by changing environmental air speed. As a result, it was confirmed that convective heat loss ratio to the total heat loss was 2/5 for calm environment, 1/2 for 0.2-0.3m/s environment and reached 2/3 for 1.0m/s environment.
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Hiroki ONO, Koji SAKAI, Ryutaro KUBO, Ryoichi KAJIYA, Sizuo IWAMOTO, T ...
Article type: Article
Session ID: F-17
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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In this study, detailed evaluation technique of thermal environment which made unsteady CFD to be main shaft for the purpose of environmental loading reduction in the housing and security of the amenity has been constructed. On this report, as first step of the study, the result of examining the analysis of forced convective heating room by means of LES is shown. The analysis was carried out using the standard Smagorinsky model, and the result of which the accuracy was good in the nonisothermal forced convection field was obtained.
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Koji SAKAI, Hiroki ONO, Ryutaro KUBO, Ryoichi KAJIYA, Sizuo IWAMOTO, T ...
Article type: Article
Session ID: F-18
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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In the previous report, LES analysis for the forced convection heating indoor was carried out. The result showed that the analytical result corresponded to the experiment approximately. The result that in this continuation paper, it carried out the LES analysis for floor heating experimental result in the identical indoor, and that it examined analysis accuracy in the natural convection field is reported. As a result of comparing the experiment with the analytical result, it was proven that the air warm corresponded to the experiment approximately.
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Huibo ZHANG, Hiroshi YOSHINO, Rie TAKAKI, Teruaki MITAMURA, Tomonari C ...
Article type: Article
Session ID: F-19
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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As the rise in indoor temperature is due to well insulation of building construction and the increase of the amount of ventilation by mechanical ventilation equipments in recent years, many Japanese occupants complain about dryness in winter. Several strategies for preventing low humidity have been investigated in two test houses, and the temperature and indoor humidity were calculated by using BSim2002 in this study. The calculated results were in good agreement with measurement data. Furthermore, four energy-efficient strategies were assumed to use under normal residential conditions in the Standard House, and indoor humidity variations with these strategies were evaluated by BSim2002.
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Toshiaki OMORI, Shin-ichi TANABE
Article type: Article
Session ID: F-20
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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Thermal sensation in a heated room can be much influenced by the building thermal insulation and the heating system equipped. Coupled simulation of convection and radiation is conducted to estimate the heat output by floor-heating system or wall-mounted air-conditioning unit for bringing the equivalent whole body thermal sensation in a room with the building insulation meeting either 1980, 1992 or 1999 Japanese energy-saving standard.
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Kunita SHINDO, Shuzo MURAKAMI, Kiyotaka DEGUCHI, Toshiaki OMORI, Toshi ...
Article type: Article
Session ID: F-21
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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Vernacular dwellings incorporate various effective techniques to improve the quality of the indoor environment by making full use of natural power. It is therefore expected to utilize their design concepts in making modern environmentally symbiotic housings. Water Housings in hot and humid areas, particularly in South East Asia are utilizing evaporative cooling effectively. In this paper, the Water Housing is measured on the spot and analyzed by CFD. Based on these data, effectiveness of the Water Housings are confirmed.
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Ryosuke MATSUMURA, Hirofumi HAYAMA, Masamichi ENAI, Koki KIKUTA, Taro ...
Article type: Article
Session ID: F-22
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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One of the most important role of home is that we can live healthy and safely. It is useful to recognize occurrence of disease and injure at home. Based on Population Survey Report, we analyzed the number of deaths in dwelling and researched following matters. 1) Seasonal variations in death toll. 2) Relationship between death toll and outdoor air temperature.
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Kahori GENJO, Masanori SUGAWARA, Shin-ichi MATSUMOTO, Ken-ichi HASEGAW ...
Article type: Article
Session ID: F-23
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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A questionnaire survey on the residential energy consumption and energy conservation behavior of student single household was conducted in winter of 2007. In this survey, both 120 single households and 65 family households of all 185 respondents were investigated. The following conclusions were drawn: 1) The possession and frequency of using appliances, single households tended to spend less time for cooking and housework activities than family households. 2) The tendency of single households to show preference on energy conservation behavior varied from that of family households. 3) The annual energy consumption of single households ranged from 5 to 20 GJ/year.
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Daisuke MATSUOKA, Taisuke MATSUMOTO, Kazunori MATSUMAE, Toru MOTEGI
Article type: Article
Session ID: F-24
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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Recently, importance has been placed on connecting living rooms, which are spaces for leisure, with other shared spaces through open stairs in the living room or open ceilings that link to 2nd floor halls, for example. These forms result in large air-conditioning loads that exceed designed capacities. We conducted investigations of actual residences. The rooms with void space make the realization of comfortable thermal environments in winter extremely difficult.
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Taisuke MATSUMOTO, Kazunori MATSUMAE, Toru MOTEGI
Article type: Article
Session ID: F-25
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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Along with the diversification of lifestyles, designs with void spaces that create a sense of openness have become popular. We are currently advancing the development of an air supply preheating 24-hour ventilation system. Operation of this system conducts base heating to a room temperature of 15℃. By reducing the load during the heating startup period, a comfortable thermal environment will be able to be realized by operating just floor heating.
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Junichi WAKAMATSU, Yasushi ABE, Takashi YANAI
Article type: Article
Session ID: H-1
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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Toward the prevention of global warming, it is more important to reduce the emissions of CO_2 from buildings On the other hand, enabling the sustainable buildings it is also important to response changing needs of a client flexibly and to maintain and enhance the value of office building continuously. In this background, the aim of this study is to investigate and analyze eight year's observed data of the high-rise office building in the urban area built in 1998 and to find information about the reduction of the environmental loads and environmental quality improvement to the future. In this paper, indoor environment that is a part of environmental performance is mainly reported
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Kenichi SASAJIMA, Takashi YANAI, Junichi WAKAMATSU, Yasushi ABE
Article type: Article
Session ID: H-2
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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In the paper, we report the trends about both energy and resource consumptions for eight years (from 1999 to 2006) after construction are completed. We take up three items for energy consumptions (the electric power, cooling and heating energy form DHC), and similarly take up three items for resource consumptions (water, intermediate water supply and waste). We think that the operation and climate conditions will be influence at the energy and resource consumptions. So, we try to analyze the change in outside temperature, humidity and driving time of air-conditioning units (for the operation situations) at first. Next, we analyze both annual and monthly trend of energy and the resource consumption for eight years.
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Takashi YANAI, Kenichi SASAJIMA, Koi Tsukamoto, Junichi WAKAMATSU, Yas ...
Article type: Article
Session ID: H-3
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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In the paper, we report the result of statistical analysis using climate data, operation data and energy consumption data and try to clarify the effect of the energy saving operation. It is said that the energy simulation method is available to measures the effect of energy saving in the building at the operation phase. However, the effect of the reduction of each saving method is not so much; therefore we combine a lot of methods and decrease energy consumption. And, it is too serious to do these calculations using energy simulation method. On the other hand, it is thought the statistical analysis method can be shows the trend of energy consumption as the entire building comparatively simply, though we try to evaluate the effect of energy saving operation using the regression analysis as a statistical method.
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Yusuke SEKI, Takashi INOUE, Masayuki ICHINOSE, Takefumi YOKOTA
Article type: Article
Session ID: H-4
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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In this study, effects of introduced equipment were verified in the latest office building including various energy saving technologies. Indoor environment and control of air-conditioning were improved by suitable adjustment for the actual conditions. Additionally, some modifications in air conditioning system were suggested, and their effects were verified by dynamic simulation program. It was shown to be able to improve operation of air conditioning system by adjustment suitable for the actual condition in an office building.
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Daisuke SAITO, Takashi INOUE, Masashi MOMOTA, Takefumi YOKOTA, Masayuk ...
Article type: Article
Session ID: H-5
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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In this report, the analysis of energy consumption and performance of heat source system for five years was performed based on the BEMS data of the energy efficient building. The performance of an air cooling heat pump chiller installed in the building was improved, and about 7% of energy reduction in an annual was shown by heat source system simulation.
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Yujiro HIRANO, Tetsuo KAWATA, Yukiko YOSHIDA, Yasumi FUJINUMA
Article type: Article
Session ID: H-6
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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This paper presents an exergy evaluation of an air conditioning system based on measurement data of a real office building. The result of this study showed that the exergy efficiencies of the air-conditioning system for space cooling and space heating were only 1.3-2.9% and 1.2-6.8%, respectively. Especially, the exergy loss of the steam boiler was more than 90%. This result implies that future technical development of the air-conditioning system has a high degree of potential for energy saving.
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Azusa IWASHIMA, Tatsuo INOOKA
Article type: Article
Session ID: H-7
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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Corresponding to the office automation of late years, big inside fever is taken into account in design. But, the surplus margin is to be against saving energy. Therefore inside fever was measured in detail in buildings of Nagoya. Based on actual survey, the basic design unit values are analyzed, and the possibilities of saving energy in illumination and OA by use are reported.
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Isanobu KIHARA, Masato FUJITANI, Masaya HIRAOKA
Article type: Article
Session ID: H-8
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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In recent years, multi-split type air-conditioning system has been often adopted especially for small and medium-sized building. However, the actual situation in operation has not been cleared. In this paper, performance evaluation of heat source is reported mainly on energy consumption of multi-split type air-conditioning system, which enable cooling and heating simultaneously.
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Ting SHI, Hiroshi YOSHINO, Yu-ki USAMI
Article type: Article
Session ID: H-9
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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In this study, field measurements have been carried out in an office building to understand the influence of sustainable design on energy consumption and thermal environment. The main sustainable design strategies include: firstly, this building is constructed in wood with the purpose to reduce CO_2 generation. Secondly, the exterior walls and roofs are well insulated in order to reduce energy consumption by the heating process while simultaneously provide comfortable thermal indoor environment in winter. Thirdly, sun-shading construction plays an important role to reduce the energy consumption for the cooling process in summer. The results show that temperature in the office building stayed constant around 20〜25℃ throughout a whole year, while energy consumption was significantly less than conventional office buildings.
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Kimihiro HONDA, Takashi YANAI
Article type: Article
Session ID: H-10
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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The main use of hot water supply in the office building is for drinking and hands washing. These uses are arranged in hot water service room and the lavatory in the office common part. The investigation of the actual energy consumption is necessary for the reduction in the energy related to hot water supply system. In this report, the high-rise office building (total floor space about 75,000m2) that built in the central area of Tokyo was targeted; we investigate the actual energy consumption of hot water supply system in the building under actual operation. Moreover, we study the possibility about energy conservation of hot water supply system using these obtained data.
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Yasuhira SHIMADA, Takashi YANAI, Hirohisa MIURA, Tamaki SHIMIZU, Masah ...
Article type: Article
Session ID: H-11
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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This report shows the results of energy analyses from the EMS in the office building located in the oceanfront city center. There're 3 points of analyses. 1) Energy consumption rate by use. 2) Water volume rate by use and the specific water consumption. 3) Energy saving effect of air conditioning system shutdown after office hour. The next reports show the measurement result of carrier system.
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Masahiro IKEDA, Takashi YANAI, Yasuhira SHIMADA, Hirohisa MIURA, Tamak ...
Article type: Article
Session ID: H-12
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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In the TA building with a standard air-conditioning system, operation has been optimized by continuous CX. In this paper, we report on results about the following four items that can be applied in general. 1) The optimization of the terminal pressure control of the secondary cold water pump. 2) The control action of exhaust fans and CAV to keep the air balance of a room. 3) There are an insufficient mixture of return and outdoor air as a factor that the temperature difference of return and supply cold water at air handling unit decreases. 4) A temporary rise of the supply air temperature is effective as antisweating of windows.
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Manami KOSHIO, Yasunori AKASHI, Yuki TAKEDA, Daisuke SUMIYOSHI, Masahi ...
Article type: Article
Session ID: H-13
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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This research aims at contribution to spread of the appropriate operation and maintenance of the building by clarifying the energy and cost saving effect when continuous energy management is carried out. In previous paper, we clarified the transition of operation method, the occurring problem and the energy consumption using measured date and calculated the effect of energy savings using HVAC&R system simulation. In this paper, we newly analyzed the measured date for ten years and examined the sing before the trouble happens.
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Tatsuya YOSHIOKA, Mamoru SHIGA
Article type: Article
Session ID: H-14
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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The survey data of energy-saving effect by operation of equipments are few though many estimated data are reported. Then, power consumption saved energy was taken to evaluate the energy-saving effect quantitatively by operation of equipments in the office building.
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Satoki HOSHINO, Etsuo HIGASHIZAWA, Masato SASAKI, Hisashi NISHIHATA, T ...
Article type: Article
Session ID: H-15
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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Overall building energy consumption, heat source operation profile and environmental load reduction measures were studied evaluated. For problem revealed by data analysis, improvements were made and several remarks and improvements on operation were proposed. It was found that energy consumption characteristic of environmental public office building, and it tends to be small, leaving possibility for further energy savings.
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Hisashi NISHIHATA, Satoki HOSHINO, Etsuo HIGASHIZAWA, Masato SASAKI, R ...
Article type: Article
Session ID: H-16
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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In this paper, the air temperature measurement and the resident questionnaire survey of the indoor thermal environment were conducted, the indoor thermal environment properties were found, and the thermal comfort was examined. Moreover, the influence to thermal comfort by rising the setting indoor air temperature was evaluated.
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Tomohisa TAKEBE, Tatsuo OKA, Satoki HOSHINO, Noriyoshi YOKOO
Article type: Article
Session ID: H-17
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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These facilities were constructed as Tochigi Prefectural Office Building. They introduce various environmental technologies. This paper reports the evaluation result of the performance of the district heating/cooling system that utilize the thermal storage system in the user's premises.
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