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Akifumi WADA, Yasunori AKASHI, Daisuke SUMIYOSHI, Tetsuo HAYASHI
Article type: Article
Session ID: F-2
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
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When designing a usual air-conditioning system, the setting of room temperature, an exit temperature of the heat source, etc. are fixed. However, if these elements are changed to the best setting according to the situation that changes hour by hour, there is a possibility that further energy conservation can be achieved. In optimization, a set value may not be the best, because the thermal load prediction includes the error margin. Therefore, it proposes the more reliable optimization technique with considering the thermal load prediction error margin. Then this effect is examined by using simulation.
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Masashi TAKESAKO, Noriaki SATO, Shinichi YONEKI, Kenichi YASUDA, Akira ...
Article type: Article
Session ID: F-3
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
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We reported the result of energy conservation by Variable Water Volume Control Program for pump head optimization by monitoring each control valve. The results show that this Program is very effective for reduce Power consumed by pumps.
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Masaki YOSHIOKA, Kanta FUKUMORI, Kazuaki IIJIMA, Mitsuyuki GOUDA, Masa ...
Article type: Article
Session ID: F-4
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
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This present paper describes the development of the optimum control system of heat source apparatus. This system has developped the purpose of maintaining high-efficiency performance of heat source about annual running. The characteristifc of this developped is controling of some apparatuss in system, keeping their condition under control organicaly. This once, we applied the system to a heat source system consisting of absorption refrigerator. The validity found in practical making use of the system is shown.
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Makoto TANAKA, Ryusuke GOTOHDA, Minoru TAKAHASHI
Article type: Article
Session ID: F-5
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
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In semiconductor fabrication and other fine-processing fields, measurements and precision processes have become common. This has generated a need for precision temperature-control systems that minimize temperature fluctuations, which can have a negative effect on measurement accuracy. This report investigates characteristics of a special responsive-heater and heat accumulators by analysis and experiments, and optimization of a combination of a special responsive-heater and accumulators. The results of this study were applied to a high-precision temperature-control system achieving an air-temperature variation within ±0.001℃.
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Tadahiko MATSUBA
Article type: Article
Session ID: F-6
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
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This paper describes a relationship between environmental conditions and dynamic characteristics of supply air temperature control system of an experimental HVAC system, which can provide various environmental conditions to `Thermal Lab1, the main chamber of the system. Dynamic characteristics of the system, approximated as first-order lag plus dead time system derived from the measured data of open loop step responses, show variety of system parameters under different thermal conditions.
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Yuu SHIRAHASE, Toshikatsu UEDA, Nakaji HONDA
Article type: Article
Session ID: F-7
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
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We proposed a model which contains supply air temperatures and human body load. It is a control system of the load presumption type that uses the linear model. In this case, the dead time of human body load, one of the most troubled, difficult to handle. Tb solve such a problem, we proposed a feedforward control method to deal with the human body load changing. And we incorporate the method with the feedback control system, and the effectiveness is obvious to show.
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Toshikatsu UEDA, Nakaji HONDA, Yuu SHIRAHASE
Article type: Article
Session ID: F-8
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
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The placement of sensors for controlling an air-conditioning system in a large indoor space is usually restricted; there-fore, it is difficult to obtain reliable temperature and velocity distributions of the air in some areas. In this paper, a method of overcoming this restriction and interaction with flow field from the outlets is presented based on a expert system.
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Kenryo NAGATA, Takao FUKUDA, Masashi MORO, Kaoru TAKEUCHI
Article type: Article
Session ID: F-9
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
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This study is to develop the system that integrated building automation and office automation in the building by using Internet Protocol. This paper reports the concept of the integrative system and the outline of the communication protocol, the application that developed. Moreover, it reports on the pilot model of this system.
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Kohsei Ichikawa
Article type: Article
Session ID: F-10
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
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Tokyo Metropolitan Government planed to establish a world wide IT hub. Corresponding to its idea to follow the business style revolution and social climate changes, Akihabara Daibiru was constructed with a high-speed and high quality broadband information network at a low-cost, integrating BA (building Automation) and OA (Office Automation) network with IP protocol. This building was designed to achieve a new building specification with BOA network system that is suitable for IT age and to supply an attractive building service for tenant with it.
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Yumi FUJIWARA, Ryoichi KAJIYA, Ryutaro KUBO, Takuto USUKURA
Article type: Article
Session ID: F-11
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
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Recently, it is interested in the rooftop planting in point of reduction of the heat island phenomenon in the urban. Then, in this study, the experiments were performed that used the moss planting that it is comparatively low-cost, lightness and construction are easy. This reports indicated that concerning thermal performance.
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Takuto USUKURA, Ryoichi KAJIYA, Ryutaro KUBO, Yumi FUJIWARA
Article type: Article
Session ID: F-12
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
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In this study, the quantity of heat was measured and the examination was performed in regard to the thermal insulation property of the moss planting. And experiments were done that it is the evaporation latent heat of moss planting, and the cooling effect of environment in surround.
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Takayoshi YOSHIOKA, Kazumasa OHASHI, Takashi MUKAI, Hiroyuki OHMORI, N ...
Article type: Article
Session ID: F-13
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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Our purpose is that we associate that effect of rooftop greening in the influence on outdoor environment, the heat insulation effect and air conditioner load. In the previous report, we reported that the outline of survey after doing rooftop greening, the heat insulation effect and the influence on outdoor environment before and after doing rooftop greening. In this report, we report that the influence by evapotranspiration of the summer and winter by SEDUM greening, and the influence on air conditioner load.
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Mikiko HAYASHI, Tatsuaki TANAKA
Article type: Article
Session ID: F-14
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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It aims to contribute to the clarification of the environment and the soil mechanism that causes microbiological soil on the architectural exterior side. The object microorganism in this study is mold and algae. It is clarified that whether it had adhered of mold and algae ahead was not predicable in this investigation of actual condition. Microorganisms such as mold and algae improve competent to the architectural exterior side by making the colony of the set and live together.
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Shuichi AOKI, Shiho MIZUNO
Article type: Article
Session ID: F-15
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
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Measurement experiments were done in order to examine the effect of rooftop greening in suppressing surface temperature increases in summer. The thermal environment data, such as temperature, heat flux, etc., were continuously measured by machine. It was found that the rooftop surface temperature of the control section rose to over 50℃ at noon on clear days, while that of the vegetation section did not rise beyond 30℃. In this research, an indoor CFD was also executed to clarify the effect of rooftop greening. As a result, the energy required for air conditioning could be decreased by about 8% in summer.
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Susanti LUSI, Yasumasa SUZUKI, Masayuki SHIMIZU, Terunori KADOYA, Hiro ...
Article type: Article
Session ID: F-16
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
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One technique to achieve indoor thermal comfort in summer is to prevent heat flow before it penetrates into a built space. It is more important to resist heat penetration into a building than to cool the penetrated heat inside of a building. In this paper, natural ventilation performance of cavity of an inclined double roof is highlighted. Both experimental observations and CFD analysis were carried out and their results were presented and discussed.
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Susanti Lusi, Yasumasa Suzuki, Masayuki Shimizu, Terunori Kadoya, Hiro ...
Article type: Article
Session ID: F-17
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
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Cooling load reduction of cavity roof of a factory was numerically discussed. Natural ventilation of the cavity was calculated as a simultaneous balance of mass and heat transfer. The variation of floor temperature irradiated from the ceiling was calculated as a three dimensional transient heat transfer in the ground. The floor temperature of a single layer roof factory arose several degrees C during a summer, but its degree was reduced with a ventilated cavity roof. The operative temperature in a large factory was able to be reduced by about 8℃ by effective cavity ventilation in a summer.
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Kunihiro MIURA, Yorimasa YASUDA
Article type: Article
Session ID: F-18
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
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Iwata Bldg is designed to use natural ventilation and underground water for air conditioning.This includes the placement of doorways and shafts, as well as the overall design itself. Once air from outside enters the building, it moves up naturally inside the building because of differences in temperatures. In that process, the flow of air takes heat from inside the building. This "free cooling" system makes energy savings possible.
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Shigeru Okamoto, Koji Yumizaki, Kazuteru Sato
Article type: Article
Session ID: F-19
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
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Double skin facade, natural ventilation and cool/heat tube are installed to reduce energy consumption. This paper reports field measurement of thermal environment and energy conservation in the S Community Center. In winter, energy conservation ratio using air in the double skin facade for heating was 44%, and 8.9% of outdoor air load for heating was reduced by using cool/heat tube.
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Shizuka HORI, Shuzo MURAKAMI, Shinsuke KATO, Ryouzou OOKA, Doosam SONG
Article type: Article
Session ID: G-1
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
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This study aims to investigate thermal environment at porous-type residence in hot and humid Asia, Hanoi. In this study, the target is a residence in Hanoi. It is called "porous type", passive approach by porosity and active approach with using cooling system are experimented. By hearing and measurement , it finds out that this system is comfortable. However, in midsummer, it is more uncomfortable at the upper region than at the under region because of strong solar radiation. In investigation of active approach, radiation cooling panels are more effective than room air conditioner at a room in this residence.
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Norio KITO, Ryoichi KUWAHARA, Masaki SHIOYA
Article type: Article
Session ID: G-2
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
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We studied thermal environment of room with radiant heating and cooling system through examinating in model experiments with ceiling radiant panels of two types . Measuring temperature of room, air flow, and surface temperature, we evaluated the affection of factors such as water supply temperature, volume of ventilation, and location of load on thermal environment. To divide the amount of heat transfer in radiation and convection, the feature of radiant panel system is obvious.
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Masaki SHIOYA, Ryoichi KUWAHARA, Norio KITO
Article type: Article
Session ID: G-3
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
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In this paper, we examined the reproducibility of the thermal environment of the ceiling radiation panel by CFD analysis. As a result, the thermal environment in the examination room was able to be reproduced in the CFD analysis. Air flow that passed the panels increased and the thermal environment was improved, when aperture rate of panels were enlarged and air flow supplied into the ceiling without using duct.
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Kaoru TAKIGASAKI, Ryuichiro YOSHIE, Hiroyuki KAWAHARA, Kenji TAKAHASHI
Article type: Article
Session ID: G-4
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
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This study is aimed at making a comfortable and energy saving building by using ceiling radiant cooling and heating system. We made a model room and measured indoor thermal environment in summer and winter. As a result, we were able to confirm that temperature and wind velocity and PMV distribution was small than FCU system.
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Tadashi TSUNODA, Yuji MASUKO
Article type: Article
Session ID: G-5
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
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A lot of floor air conditionings are done so far. The floor air conditioning was constructed to the area of the compound facilities in the Tajima-cho in seven places by two or more methods this time. Among these, a large hall constructed the floor air conditioning by wet and a dry using together. Because the content and an environmental effect are measured and evaluated twice in winter and summer, reports.
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Yuko KAWAHARA, Ineko TANAKA, Tetsumi HORIKOSHI, Daisuke ARIKAWA
Article type: Article
Session ID: G-6
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
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To clarify the real conditions of utilizing the floor heating, the questionnaire survey was conducted for the residents in residential houses equipped with the floor heating system in Tokai area. As a result, most of floor heating system is installed on living/dining rooms. Family members are used to together in the living room with the floor heating, the convectional heating facilities were chiefly used as supplemental heating together with the floor heating. About 90% of the residents were satisfied with the thermal environment of the room heated by the hot water floor heating system. Dissatisfied rate to increase up to 20% when the rate of area covered with the floor heating installation to overall floor area fell below 60%.
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Ineko TANAKA, Yuko KAWAHARA, Tetsumi HORIKOSHI, Daisuke ARIKAWA
Article type: Article
Session ID: G-7
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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In order to clarify the themal environment and the ways of living in the houses equipped with floors heating system, the surveys were carried at in last winter for 46 houses in Tokai area. It wag found thet 85% of the residents used supplemental heating facilitiaa while using floor heatirg system, and 20% of the residets used humidifiers. Characteristics of using time and control of floor tamperature in each living room were ford ag follows: 39% of residents controlled floor heating system at multiple times a day, and 50% of floor heating systetms were set as 30 degree Celsius of the surface temprature. These data will contribute to effictive utilization of floor heating system in relatively warm of Japan.
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Masaru NAKAZAWA, Ryoichi KAJIYA, Takashi KURABUCHI, Ryutaro KUBO
Article type: Article
Session ID: G-8
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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This study was carried out in order to construct a method to predict thermal sensation and airflow distribution in the floor-heating room. This paper presents the measuring experiment and the CFD simulation using the Low-Reynolds-Number k-ε model with the heating floor. The CFD simulation results show moderate agreement with the experiment for airflow distribution and temperature distribution in the floor-heating room.
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Ryutaro KUBO, Ryoichi KAJIYA, Koji SAKAI, Toshikatsu UEDA, You MATSUO
Article type: Article
Session ID: G-9
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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This study was carried out in order to construct a method to predict thermal sensation and airflow distribution in the floor-heating room. This paper presents the measuring experiment and the CFD simulation using LES in the floor-heating room. The CFD simulation by the means of LES results showed moderate agreement with the experiment for airflow distribution and temperature distribution in the floor-heated room. Moreover, the LES analysis which applied Damping Function shows that an experiment result can be reproduced more faithfully as compared with the case where Damping Function is not applied.
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Yosiaki SAITOU, Shinsuke KATO, Hirokazu IKEZAWA, Ken SHOJI, Kiyoshi HI ...
Article type: Article
Session ID: G-10
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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We examined performance of thermal environment of large scale space which is covered with lots of glass and is formed by complicated shapes in summer and winter. We obtained following results. (1)Thermal environment is excellent result both summer and winter. (2)CFD analysis is useful for checking heat temperature distribution, the effect of solar radiation and so on.
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Hirokazu IKEZAWA, Shinsuke KATO, Yoshiaki SAITO, Masaaki HIGUCHI, Tomo ...
Article type: Article
Session ID: G-11
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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The temperature distribution tends to be caused in the large room with glass facade. In this paper, the CFD analysis and the measurement around the boarding gate of the airport terminalbuilding were reported. We found that the CFD analysis is useful for the forecast of the indoor thermal environment. We also confirmed by the measurement that the dwelling space of residence region was well air-conditioned and kept comfortable both in summer and winter.
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Takuro KIKUCHI, Shinsuke KATO, Hirokazu IKEZAWA, Yosiaki SAITO, Masaak ...
Article type: Article
Session ID: G-12
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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"Mechanical Lantern", which is air supply opening with lighting adopted at gate lounge of air terminal building, has a rotary impeller powered by pressure of supply air. It changes supply direction with rotation of the rotary impeller. In this paper, the experiment searching air volume-rotation frequency relation and actual measurement of wind velocity around Mechanical Lantern were reported. We confirmed proper rotation frequency by suitable air volume and found Mechanical Lantern equalizing the distribution of supply air.
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Akio ISHI, Sakuo SUGAWARA
Article type: Article
Session ID: G-13
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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Measurements on thermal environment were conducted in university lecture rooms underair-conditioning for various set temperatures in summer and winter. Simultaneous measurements in nine rooms showed the different results in agreement of measured temperature with set temperature from room to room and from case to case. Full measurements in the smallest room showed poor attainment of set temperature at the abdomen level of a sedentary person and much poorer at the foot. The vertical temperature difference more than four degrees between head and foot of a sedentary person in heating was reduced to less than three degrees using an air circulator under development, resulting in meeting to ASHRAE Standard 55-2004.
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Masakazu SAKURAI
Article type: Article
Session ID: G-14
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
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Falling 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 measur, we discovered a temperature fluctuates that the natural convection is a cause of fall temperature for under groud space.
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Kazunori SHIROISHI, Takashi INOUE, Masashi MOMOTA, Noriaki SATO, Shige ...
Article type: Article
Session ID: G-15
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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Airflow window and double-skin have been proposed and developed in order to realize solar shading. This study is intended to clarify the effect of these windows in an office building with full-height window by means of measurement. This report shows that these windows have beneficial effects on solar shading, and describes the result of measuring solar shading performance of airflow window in an actual condition.
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Kou OSAWA, Osamu MATSUSHIMA, Masaru OHARA, Keiichi YOSHIMUTA
Article type: Article
Session ID: G-16
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
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This building is a data center building, characterized by the quick conversion from office to server room with under floor air conditioning system and ceiling less system. The facade has the high performance heat insulation and solar shading by the pair glass and the vertical type louver turned on hinge. Furthermore perimeterless system is actualized by the built-in fans under the floor which control solar radiation load in summer and cold draft in winter. The result of winter measurement cleared effectiveness of these systems.
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Yuji KOHATA, Hirohumi HAYAMA, Masamichi ENAI, Tarou MORI
Article type: Article
Session ID: G-17
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
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Zoning of air-conditioning is a technique well used when equipment design. But, the clear judgment standard of zoning does not exist. A possibility of occurrence of mixing energy loss is born by preparing zoning. Zoning of air-conditioning is originally needed when room temperature is sovaried that different air-conditioning control is required.Then, in this research, I investigated the influence of many elements upon an indoor temperature distribution, and aim at the proposal of an indicator which judges the existence of zoning.
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Hiroyuki SASAO
Article type: Article
Session ID: G-18
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
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In this paper, empirical equations for airflow-generated noise and pressure drop of rectangular dissipative silencers are given. The empirical equations of airflow-generated noise consist of two expressions for the high frequency and for the low frequency. The high frequency noise is thought to be the boundary layer noise of the silencer wall, and frequency characteristics is characterized in the ratio of the frequency and flow velocity. The empirical equation of the pressure drop is made based on the friction loss of a circular duct and the local pressure loss such as a diffuser.
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Takayoshi SUZUKI, Toshikatsu KIMURA, Shoji KIDO, Masahiro KOJIMA, Toru ...
Article type: Article
Session ID: G-19
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
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In the previous report, we focused on the elbow-shaped silencer in a part of a wind tunnel for reducing of noise and pressure loss in a wind tunnel in a substation. In particular, we conducted some basic experiments on evaluations the effectiveness of sound absorption in low frequency range and obtained some insights. The experimental model in the previous report used 3 kinds of test ducts in sizes such as 600mm(W) x 600mm(H). However, in this report, we used a test duct of size 1200mm(W) x 1200mm(W) which is closer to the real scale of the wind tunnel in a substation.
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Shuji SHIRAKI, Keiichi TANABE, Yasuhiro BONKOBARA, Takahiro KONDOU
Article type: Article
Session ID: G-20
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
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We have considered for vibration characteristics of a piping system inserted flexible joints. So we have estimated to vibration reduction of pipe wall applying insertion with double flexible joints under several conditions.
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Naoko KATO, Morimasa ITAMOTO, Kaori MIYAUCHI
Article type: Article
Session ID: G-21
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
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In this report, sound characteristics of newly established quiet source of air, reverberation room and anechoic room are evaluated by 1/1 octave band center frequencies. Moreover, airflow characteristics of newly established reverberaion room are clarified. As a result, newly established quiet source of air, reverberation room and anechoic room have enough performance for measurement of airflow and sound.
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Toshio KAWATO
Article type: Article
Session ID: G-22
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
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This Research investigated Security in the Modern Housing. This Research was an Investigation of the Noise Characteristic of the Crime Prevention Gravel. The Researched Crime Prevention Gravel was made of the Recycling Grass. It proposed the New Crime Prevention Gravel that mixed the Construction Waste with General Gravel. The Splinter of the Construction waste is used Brick, Roofing Tile and the Block. The Crime Prevention Gravel made of the Recycling Glass did not have a Remarkable Difference by Weight.
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Naoaki ISAYAMA, Yoshiyuki SHIMODA, Minoru MIZUNO, Tomoji NAGOTA, Yohei ...
Article type: Article
Session ID: H-1
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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This study aims to verify the advantages of district heating and cooling system in energy efficiency. From the measurement data, the parameters which characterize the energy efficiency of heating/cooling plant are identified for DHC and individual building respectively. Simulation model which is able to consider the difference in these parameters is developed and the advantages and disadvantages of district heating and cooling system and the effect of each parameter are examined by the simulation model. The results show that the energy efficiency for cooling in DHC is superior to individual cooling system by 'concentration effect' and 'grade of operation'.
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Yohei YAMAGUCHI, Yoshiyuki SHIMODA, Minoru MIZUNO, Tomoji NAGOTA, Naoa ...
Article type: Article
Session ID: H-2
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
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This paper evaluates measures to improve the energy generation and distribution performance of District Heating and Cooling (DHC) systems. First, we focus on performance improvement of existing DHC systems through commissioning. We analyze measured data of existing DHC systems in order to identify factors that cause the deterioration of system performance. Then, we clarify energy saving effects of measures in commissioning based on a simulation model considering practical operational conditions. Second, we evaluate introduction of advanced technologies and design of heat demand of buildings appropriate for DHC. Finally, we make recommendations to develop future DHC systems.
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hideaki NAKAJIMA, masayuki NAKAMURA, yasusi HATTORI, iwao HASEGAWA, mi ...
Article type: Article
Session ID: H-3
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
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A DHC (District Heating and Cooling system) provides chilled water and steam to a large complex building. The building owner is concerned about saving energy cost for the HVAC system. This paper presents the chilled water supply control method at a peak load in summer and the result of this control.
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Mayuko UENO, Yasuhiro HAMADA, Hideki KUBOTA, Makoto NAKAMURA, Kouhei K ...
Article type: Article
Session ID: H-4
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
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This study describes analyses on characteristics of Underground Thermal Energy by using digital national land information .We made maps that show the distribution of underground characteristics in Sapporo by using a Geographic Information System (GIS) and hydrogeological information, and evaluations were carried out on the feasibility of Underground Thermal Energy.
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Shuso NAGATA, Masayuki SATO, Kazumasa YOSHIHARA
Article type: Article
Session ID: H-5
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
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In 2004, a high school was opened at Yokote city in Akita prefecture. Snow Storage Cooling System was designed for the school building. In this paper, outline of the energy saving system and analyzed actual performance in the first year are reported.
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Yukiko AIHARA, Yoshiharu ASANO
Article type: Article
Session ID: H-6
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
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In order to promote the effective use of new energy the questionnaire was executed to local governments in Nagano prefecture as the preliminary survey. The current state of the new energy use and the future plan were cleared. And the local governments had tendency to use various type of the new energy. The use possibility of new energy, which could be relied on the regional characteristics, was investigated. Then the suitable type of new energy, that was suitable for each local government in Nagano prefecture was cleared.
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Toshihiro YASUOKA, Tadakatsu TAKEGAWA, Yoshiyuki NAGURA, Youichi KOBAY ...
Article type: Article
Session ID: H-7
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
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The Yonden new building adopts the energy reduction measure using natural energy such as "Soil thermal storage" and "Free cooling" where the electric power load leveling, energy conservation, and the environmental burden reduction that is the management problem are practiced in Shikoku Electric Power Co., Inc. in addition to the water thermal storage system that has worked so far. In this report, these outline of the passive low energy plan, slub heat storage measurement results and soil heat storage measurement results in winter.
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Yukio ISHIKAWA, Hiroaki KITANO
Article type: Article
Session ID: H-8
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
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In the previous studies, evaporative cooling effect of perspiration roof with the use of thermo-sensitive hydrogel was examined experimentally. The perspiration roof is a roof in which water can be absorbed or desorbed, depending on its temperature, that is, water absorption in case its temperature below a certain sense temperature (set temperature), and water desorption above the sense temperature. This paper describes the examination results of optimum sense temperature of the perspiration roof; using detached house as a simulation model, and of its evaporative cooling effect in terms of heat gain decrease, as compared to the non perspiration roof.
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Katsunori NAGANO, Takao KATSURA, Sayaka TAKEDA, Kazumi SHIMAKURA, Taka ...
Article type: Article
Session ID: H-9
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
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In this paper, a calculation method of the heat transfer in the indirect heat exchange type steel pile for the GSHP system was developed and its reproducibility was confirmed by comparing calculated values with actual measurements. First, the effective heat conductivity of the surrounding soil was evaluated by applying the calculation method of the design and performance prediction tool for the GSHP system. The result was 1.5 W/m/K in comparison calculated temperature variations returned from the ground heat exchanger with a measured one. Next, a calculation method of the heat transfer in the indirect heat exchange type steel pile was shown and values calculated with the method was compared to the actual measurement. As a result, it was demonstrated that calculated temperature variations returned from the ground heat exchanger reproduced those of measured in the case where steel piles with both diameter 400mm and 165mm were used.
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Katsunori NAGANO, Takao KATSURA, Sayaka TAKEDA, Kazumi SHIMAKURA, Taka ...
Article type: Article
Session ID: H-10
Published: July 25, 2005
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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Two kind of large scale buildings planed installations of the GSHP system with steel foundation piles as the ground heat exchangers in cold region are predicted performance and installing effect by a design and performance prediction tool for the GSHP system. In the fast one, it was shown that the GSHP system with 70 steel foundation piles of 37m long can operate for heating and cooling demand of the building of floor area 2000m^2. Another performance prediction of the GSHP system with 51 steel foundation piles of approximately 4.7m long demonstrated the heating output of the GSHP system enough to cover the base heating demand of 50kW generated by ventilation of the building.
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