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Takuma SHIOZAWA, Yasuhiro HAMADA, Takanori SUDA, Shuhei SUZUKI, Katsun ...
Article type: Article
Session ID: B-44
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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This study aims to establish hydrogen storage and supply system for residence. We devised new hydrogen system without heat exchange to supply and store hydrogen, which has better energy efficiency than conventional hydrogen storage system. Firstly, hydrogen absorbing alloys were selected as a hydrogen storage material which is easy to handle (no heat exchange) and safer to use (at normal pressure).Characteristics of hydrogen supply and storage were examined by an experiment. Secondly, basic hydrogen supply and storage performance tests of the system were conducted. Finally, the hydrogen powered fuel cell was operated by the system to determine duration time of constant hydrogen supply. The results suggested that the system can operate hydrogen powered fuel cell at normal temperature and pressure.
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Kimihiro HONDA, Takashi YANAI, Yoshimi TAKEUCHI, Ritsu HOMMA
Article type: Article
Session ID: B-45
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
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The development plans in the center of a city are composed of a large scale and the high rise building, and high performance is demanded by a most-advanced tenant etc. Therefore, the leveling ofthe load and the energy conservation and the saving resource are needed so that the load may in a high density strain to the city infrastructures of electricity, the gas, water service, and drain, etc. Especially, in the existence area, a phased practice of energy conservation used a current system is important.
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Yingjun RAUN, Toshiyuki WATANABE, Weijun GAO
Article type: Article
Session ID: B-46
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
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A district energy system at Kitakyushu Science and Research Park (KSRP) has been introduced. In this paper, the system's running situation was analyzed by using the recorded data in 2003. Generating electricity, heat recovery efficiency and recovery heat utilization efficiency for gas engine and fuel cell were calculated. On the basis of the above study, energy saving and CO_2 reduction were evaluated.
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Naoko KAWASHIMA, Shinta TANABE, Kimiya MURAKAMI, Hiroaki YAMADA, Kiyof ...
Article type: Article
Session ID: B-47
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
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In late years there was not the example that introduced the high efficiency gas cogeneration system which adopted a developed lean-burn miller cycle into a hotel till now. Therefore it is important to evaluate an introduction effect to a large-scale hotel of this system based on operation data when it thinks about the system introduction in a future large hotel.A purpose of this study is to clarify the actual situation of energy consumption and of heat load of the latest large-scale hotel and to inspect an introduction effect of high efficiency CGS.
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Naoko KAWASHIMA, Shinta TANABE, Kimiya MURAKAMI, Hiroaki YAMADA, Kiyof ...
Article type: Article
Session ID: B-48
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
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The latest large-scale hotel energy consumption and the realities of heat load have been clarified in part1. A purpose of this study is to evaluate efficiency and the energy conservation of the cogeneration and to verify the effect of the introduction of high efficiency CGS. The results show that this cogeneration system is operating in high efciency and contributes to energy conservation.
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Yoshihiko TANAKA, Yoh MATSUO, Yuzo SAKAMOTO, Yoshiyuki SHIMODA, Tomoak ...
Article type: Article
Session ID: C-22
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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Recently, BEMS has been spread as a part of the building facilities. By the analysis of BEMS data, we can clarify the actual operating situation of the building facilities, and find the new problems such as energy loss by technical mutual interferences of energy saving systems. To solve these problems and realize further energy saving, we propose "The integration-oriented design and operate" which is new general idea.
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Keisuke HIGASHI, Ryoichi KAJIYA, Koji SAKAI, Toshikatsu UEDA
Article type: Article
Session ID: C-23
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
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The purpose of this research is development of the approximation method about the high-speed air nozzle when CFD simulation is analyzed. The advantage is a reduction in the number of meshes and the computing time. The approximation method is in the adjustment of the length of the core zone. In this paper, the process of the making approximate equations is present.
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Motoyuki GONDO, Noriyuki YAMADA, Koichi TODA
Article type: Article
Session ID: C-24
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
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The phenomenon of the Coanda Effect is easily occurred by the influence of the two-dimensional jet. But, it is difficult to use a slot outlet with full length between two side walls for an actual system. This paper presents a new Coanda Effect using nozzles instead of a slot. The combined three-dimensional jets from nozzles could produce a plane jet. We proved possibility of the method as an effective local space air conditioning system for large indoor spaces.
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Kazumasa SHIMADA, Kazuaki IIJIMA, Satoru NOGUCHI
Article type: Article
Session ID: C-25
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
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We developed variable air volume unit by small turbo fan using speed control. Air volume unit by small turbo fan improves energy conservation and flexibility. We introduce result of examination multiple units installed variable air volume system by small turbo fan.
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Mine SUDO, Takeo TAKAHASHI, Shinsuke KATO
Article type: Article
Session ID: C-26
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
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In this study, we examined the performance of thenmally powered VAV diffusers from the viewpoint thermal comfort and energy conservation. Effective draft temperature of thermally powered VAV diffusers in most measurement point is within comfortable range. And energy reduction is 43.6% compared with the conventional diffusers.
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Shoichi NAKAI, Yoriyuki TORIGOE, Takahiro KUMAO
Article type: Article
Session ID: C-27
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
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In the building facilities industry, labor saving and resource saving of construction materials are required. In late years, air conditioning duct and pipe without thermal insulation were put to practical use, and it came to be adopted with facilities for the construction period by shortening and reduction in cost being effective. In this paper, we intended for air conditioning pipe without thermal insulation, and performed experimental inspection about dew condensation of the air conditioning drain pipe.
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Toru IIDA, Kenichi MATSUMOTO, Toshihisa MATSUSHIMA, Kazunori MITO
Article type: Article
Session ID: C-28
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
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PE-X pipe is well-known among us to be pervious to oxygen. It is confirmed through our experiment that the degree of effect on SGP in case of partial use of PE-X pipes in the closed circuit system of Air-conditioning with SGP. The measurement of the oxygen permeability coefcient of PE-X pipe shows that the permeation of oxygen has a little effect on the life span of the air-conditioning system with PE-X pipes, moreover, oxygen permeability coefficient of PE-X pipe can stand at 6OmL/m^2・24hr・atm/mm constantly all through the experimental period .
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Yusuke HAGA, Hokuto NAKAMURA, Tatsuo NOBE
Article type: Article
Session ID: C-29
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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This paper reports the on-site performance evaluation of Variable Refrigerant Volume (VRV) system. The actual performance of VRV system is not cleared. Therefore, the authors examined the measurement method to evaluate the actual performance from outdoor units. Energy balance of VRV system was clarified and the measurement items of EHP and GHP were cleanness. Thus Probe Insertion Method was devised. In this paper, it examines concept of Probe Insertion Method and telemetry system.
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Hokuto NAKAMURA, Yusuke HAGA, Tatsuo NOBE
Article type: Article
Session ID: C-30
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
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This paper reports two on-site evaluations of VRV system by probe insertion method. In a case of EHP, we measured outdoor unit specified 6HP ability. In a case of GHP,we measured outdoor unit specified 30HP ability. Both of them,on-site evaluations show that VRV system performance fluctuated by many factors. Our purpose is making clear actual VRV system by probe insertion method.
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Yu NAKANISHI, Teruyuki SAITO, Gouhai XU
Article type: Article
Session ID: C-31
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
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In this paper, air handling unit and multi-split type air conditioning system are compared in the control performance of indoor thermal environment. We measured room and supply air temperature in the office space where both air conditioning systems were introduced. Both systems had almost the same average of indoor temperature but multi-split type air conditioning system had more considerable change of room temperature during 30 minutes. This was caused by the variation of supply air temperature changed between 8 and 18 deg during 30 minutes in part load operation at room cooling mode.
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Kosuke SATO, Satoshi HASHIMOTO
Article type: Article
Session ID: C-32
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
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One feature of multiple packaged unit system is a temperature setting change of each indoor unit. This paper discusses the change frequency and the difference degree of temperature set value of this system. It was clarified that the ratio of changing of temperature set value is high all the year round. And, the tendency of the change frequency and the difference degree of temperature set value in the same space was unrelated to the plane or air-conditioning zoning.
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Yuko TOYAMA, Teruyuki SAITO, Yu NAKANISHI, Guohai XU, Taizo KIRIYAMA
Article type: Article
Session ID: C-33
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
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In this paper we investigated indoor thermal environment of an office with multi-sprit type air conditioning system, and operating state of indoor units. The floor was divided to south and north area. The index "operating value" was defined by difference between inlet and outlet temperature of indoor unit, and measurement interval. Indoor temperature of each areawas almost the same. In cooling period, energy consumption of south area increased according to increase of operating value and outdoor temperature. However, energy consumption of north area was large without relating to operating value when outdoor temperature was 30〜35℃.
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Yoshiaki KAWAKAMI, Shuichi ISHII, Masayuki TAN NO, Jun SASAKI, Ken YUA ...
Article type: Article
Session ID: C-34
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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Multiple packaged air conditioning unit systems are widely recognized as one of popular air conditioning system for buildings.We developed a high performance multi-air-conditioning system (SUBCOOLING SYSTEM).This system is to cool the refrigerant by an additional heat exchanger.According to the field test for two years, the energy conservation of the SUBCOOLING SYSTEM was evaluated measuring the electric power. As a result, electric power consumption of this system is able to reduce 12-20% on the peak cooling load, and to reduce 13% in the cooling season as compared with the conventional multi-air-conditioning system.
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Kenji Takeuchi, Yukinori Sakashita
Article type: Article
Session ID: C-35
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
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It is a current trend to separate cold-aisle and hot-aisle in planning air conditioning system for data centers.However, due to the unexpected increase of heat generation by high-performance equipment, the server room atmosphere seems to be far from satisfactory level. The actual measurement result of the cold-aisle/hot-aisle air conditioning this time revealed the potential issues.
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Ari Yoshii, Makoto Takahashi, Hideki Kaneko, Tsuneo Uekusa
Article type: Article
Session ID: C-36
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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We investigated the effects of different layouts and shapes of ceiling apertures on the temperature environment of data center computer rooms with under-floor air supply and ceiling return systems. Experiments reveal that varying the shapes of the apertures (where the total aperture area was held constant) had little impact on the temperature environment of theroom, but varying the layout of the apertures did have a significant effect on the temperature environment.
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Takeshi YOKOYAMA, Masahiro OKA, Makoto AKAIKE, Makoto MISAWA, Takahiko ...
Article type: Article
Session ID: C-37
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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In recent years, due to the spread of IT equipments accompanying advances in computers and telecommunications, air conditioning loads for cooling IT equipments are increasing. In the buildings designed for installation of a lot of computers and equipments for telecommunications, the equipments installed in the interior consume electrical power in massive amounts, and measures to reduce power consumption are very important. To resolve these problems, TOKYO GAS CO., LTD developed a GHP which is designed exclusively for cooling of telecommunications equipment rooms jointly with YANMAR ENERGY SYSTEM CO., LTD.
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ShinnchI TAKAHASHI, Masayoshi TODA, Shigeki KAMETANI
Article type: Article
Session ID: C-38
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
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The performance of split air conditioning systems are evaluated by JIS and JRA rules. however the acutual performance of these systems are not estimated by these tests because of these tests are done under the constant conditions. We study the method of actual performance evaluation based on characteristic curve of the refrigerant compressor.
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Manabu KISHIA, Tsuneo UEKUSA
Article type: Article
Session ID: C-39
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
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This paper describes about the effect of layout plans for outdoor condensing units on the operating efficiency of air conditioners. In the case of limited space for outdoor condensing units, it was found that an optimal value exists for the placement ratio between roof and balcony. It has been shown that predicting the intake temperature of outdoor condensing units and then determining a layout plan for them is an effective means of achieving efficient and appropriate operation for air conditioners.
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Hirofumi HAYAMA, Masamichi ENAI, Koki KIKUTA, Hideki KANEKO
Article type: Article
Session ID: C-40
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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Information systems play an important role in today's advanced information society. The concentration and performance of the information processing devices that make up these systems are increasingly rapidly, and this has led to an increase in the heat concentration of Data Centers as well. For this reason, air conditioning systems for Data Centers must offer a high level of reliability to constantly maintain appropriate room temperatures. In this paper, we will use the previously proposed calculation method to conduct the following studies, targeting cases in which the systems have actually been implemented. 1) Simulation to grasp the reliability characteristic in the system. 2) The factor given to the reliability of an air-conditioning system is grasped using the Taguchi method.
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Masazumi GODO, Kunio MIURA, Yutaka WATANABE, Toshihiko ISHIZAWA, Takes ...
Article type: Article
Session ID: C-41
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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The purpose of this system is to improve the interior environment by developing a desiccant system and constructing operational and control technology for air conditioning systems under non-CFC conditions to actively monitor and regulate the temperature and humidity in the room. In this study, development of regeneration method for an adsorbent using the microwave irradiation method was performed. A database was established for the effects of microwave oscillation power, irradiation period, and timing, which confirmed the adsorbent regeneration energy efficiency of up to 12% and established the effectiveness of microwave heating.
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Takeshi TAKATSUKA, Toshihiko ISHIZAWA, Yutaka WATANABE, Masazumi GOHDO ...
Article type: Article
Session ID: C-42
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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We investigated the effects of the operational state for the energy consumption on the room air-conditioner. We experimented at the environmental test room which was possible to be controlled from the high-temperature/high-humidity (40℃, 24g/kg(DA)) to the low-temperature/low-humidity (10℃, 2.0g/kg(DA)). As the result, it was shown that power consumption of the active swing method operation and the constant temperature control operation became equal about the room air-conditioner with 2.8 kW class. In addition, we investigated an electric power characteristic in case of room air-conditioner start-up about the cooling mode and the heating mode.
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Yuta EZAKI, Hayato OHASHI, Yoshitaka HODA, Hitomi TSUTSUMI, Junkichi H ...
Article type: Article
Session ID: C-43
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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Subjective experiments were carried out in a climate chamber using 16 subjects of both genders in order to evaluate humancomfort at extremely low humidity. Two levels of absolute humidity were examined, 2 and 10 g/kg(DA). For each absolute humidity condition, 3 air temperatures were set, 20, 25, and 30℃. Significantly lower skin moisture was observed at low absolute humidity. Extremely low humidity caused subjective dryness sensation. Greater dryness sensation at lower temperature were observed among the conditions with constant absolute humidity.Female subjects reported greater discomfort and fatigue due to environmental humidity than males.
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Wanghee CHO, Shinsuke KATO, Junichi TEZUKA, Satoshi NIKAWA
Article type: Article
Session ID: C-44
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
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Conventional desiccant air-conditioning systems are adopted on mainly large scale buildings such as offices and hotels.They have rotors for desiccant and sensible heat exchange. They therefore require a bit large machine room for air-conditioning. However, for detached houses there are not enough space for AC, so that a new air-conditioning system for substituting for rotor types is required. In this paper, as prerequisites for development of residential desiccant air-conditioning system, the moisture adsorption/desorption characteristic in a detached model house was analyzed by TRNSYS simulation coupled with COMIS. We compared the absolute humidity, the quantity of moisture absorption, the annual latent heat load, the cumulative ratio of relative humidity over 70%, the occurrence of condensation in room with or without silica gel.
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Shuji IKEGAMI, Nobuki MATSUI
Article type: Article
Session ID: C-45
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
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The purpose of this study is to present a new air conditioning system which separates from latent heat and the sensible heat which use high efficiency compact desiccant. It did field test and the result of comparing with the conventional air conditioning system, the comfort it improved largely, furthermore per summer 21%, achieved 14% energy conservation per winter season.
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Koichi KAWAMOTO, Shinsuke KATO, Makoto KOGANEI, Ryozo OOKA, Norio SHOD ...
Article type: Article
Session ID: C-46
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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The purpose of this study is to realize a non-condensing environment by developing a new type of desiccant air-conditioning system with higher energy efficiency. In this paper, the overall energy efficiency and IAQ of new type of desiccant outdoor air-conditioning systems which are combined with CO_2 heat pump are compared with those of the conventional outdoor air-conditioning systems, by simulated calculation at typical hotel rooms over summer period.The results show that the system COP of the proposed systems is considerably higher than those of the conventional outdoor air-conditioning systems, although non-condensing environment and higher level of IAQ is achieved.
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Makoto KOGANEI, Shinsuke KATO, Ryozo OOKA, Wanghee CHO, Yaw-Shyan TSAY ...
Article type: Article
Session ID: C-47
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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The purpose of this study is to realize a non-condensing environment by developing a new type of desiccant air-conditioning system with lower energy consumption. In this paper, a displacement air-conditioning system with a desiccant outdoor air-conditioning unit is proposed and the overall energy efficiency of this system is compared with that of the conventional outdoor air-conditioning system. The results show that the system COP of the proposed system is considerably higher than that of the conventional outdoor air-conditioning system.
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Shigeyuki NAGASAKA, Takashi MATSUMOTO, Hisashi SASAKI, Satoshi UEMURA, ...
Article type: Article
Session ID: C-48
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
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This Study features research and development into a novel air conditioning system to halve the energy used for air conditioning, which represents 40% of the total energy consumption in clean rooms. The main target involves developing new outdoor air treatment equipment requiring no refrigerators. The operational conditions of the liquid desiccant system were determined by experiments. The method of membrane distillation under vacuum was selected from the several means of regeneration available, excluding evaporation by heating. Energy saving features for vacuum systems can be planned if our semiconductor manufacturing technology and newly developed pumps are installed.
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Yoshihisa MOMOI, Ryuichiro YOSHIE, Akira SATAKE, Hiroshi YOSHINO, Akas ...
Article type: Article
Session ID: C-49
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
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We developed a numerical method which simulates combined heat and water vapor transfer processes in solid desiccant materials. It can evaluate moisture adsorption and desorption to the materials and their heat generations. Firstly, we measured the adsorption isotherm and moisture transfer coefficient of the desiccant rotor which have a great effect on the performance of dehumidification. Secondary, in order to validate the numerical calculation method considering the wheel's rotation, we compared the calculation results with the experimental results for an actual desiccant machine.
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Sota OKABE, Katsunori NAGANO, Sayaka TAKEDA
Article type: Article
Session ID: C-50
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
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The aim of this study is to develop an air conditioning system in which dehumidification is separated from the cooling process. Wet air is dehumidified by honeycomb desiccant materials. The adsorbed vapor is then desorbed by using low temperature exhaust heat obtained from thermal energy storage. The mass transfer coefficient of a honeycomb desiccant material is estimated at 1.0x10^<-5> m/s by an experiment. It is found that a two-step desiccant process enables to decrease the temperature of regeneration to 53 ℃, whereas a single desiccant process needs the temperature of 90 ℃. The use of the exhaust heat can lead to reduction of energy consumption for regeneration about 26 % in such a dehumidification system.
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Hiroshi IIZUKA, Akira OKAGAKI, Keiji NONOSE, Takayuki MATSUSHIMA, Tats ...
Article type: Article
Session ID: D-16
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
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This paper reports the outline of the project, with the idea of main environmental technology, and energy conservation system, and an evaluation of the effect. Sustainable technology is utilized in Advanced Laboratory and achieved 64% reduction of CO2 emission in comparison to a benchmark ('90 scales / building for same use).
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Akira OKAGAKI, Hiroshi IIZUKA, Keiji NONOSE, Yuriko ANZAWA, Minoru TOY ...
Article type: Article
Session ID: D-17
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
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To achieve the high level target to reduce environmental load, the procedure of actions in each stage of design, construction and operation was set. At the design stage, the evaluation of energy consumption by simulation was done. At the construction stage, the eco-committee was held to evaluate the waste, CO2, eco-material and LCA. At the operation stage, the follow-up committee was held to analyze the energy data. As a result of these actions, environmental load reduction target was achieved.
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Keiji NONOSE, Hiroshi IIZUKA, Tatsuo NOBE, Akira OKAGAKI, Yuriko ANZAW ...
Article type: Article
Session ID: D-18
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
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Advanced Laboratory with various sustainable technologies was designed last year and building equipment had been adjusted through conferences since its completion. In the former report, the outline of sustainable technologies was introduced and has estimated the reduction effect of C02 emission into the entire building equipment. This paper clarifies the energy performance of the heat source system for building the air-conditioning by using the measured operating data.As a result, for each of the sustainable technology installed, the heat source system was confirmed to be well-functioning.
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Kae YOSHIKAWA, Tatsuo NOBE, Keiji NONOSE, Hiroshi IIZUKA, Takayuki MAT ...
Article type: Article
Session ID: D-19
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
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This laboratory adopts the technique of 100 or more for energy conservation and the environmental burden decrease.This paper reports performance evaluation of natural ventilation system and night purge system by field measurement in this laboratory A building.Moreover, airflow characteristics of this laboratory were verified with airflow simulation on the basis of the measurement result. Furthermore, this report estimated the amount of annual energy conservation by the natural ventilation from measurement result.
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Atsushi YOKOYAMA, Tatsuo NOBE, Keiji NONOSE, Hiroshi IIZUKA, Takayuki ...
Article type: Article
Session ID: D-20
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
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This paper reports on the thermal environment evaluation of atrium in the laboratory.This laboratory has two buildings these names are A and C. They have a large size atrium each building. The purpose of this investigation was understood thermal environment and comfort of the whole and working area in the atrium by measuring the temperature and humidity throughout the year.
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Junko HAYASHI, Tatsuo NOBE, Shin-ich TANABE, Hiroshi IIZUKA, Keiji NON ...
Article type: Article
Session ID: D-21
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
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The 2-way sock filter system was developed. The membrane inside the cylindrical filter could change air direction for cooling and heating by covering the upper or lower half side of the cylinder. The experiments were carried out to clarify its performance on thermal comfort. The number and position of slot and air volume of permeation side were changed.The developed system was installed in an advanced laboratory and the field survey was carried out in summer and winter period. It was considered the system could keep indoor air condition still and vertical air temperature difference was small.
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Yoshio MASUKAWA, Satoshi TOGARI, Katsuhiro MIURA, Shigeyuki MATSUOKA
Article type: Article
Session ID: D-22
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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Building services are often operated with potential energy waste that can be cut down. We recognized such potential energy waste in building services by analyzing the operation data of buildings and defined them as "Energy Fault (EF)".The objective of this R&D is a development of techniques to detect such energy faults by utilizing building operation data.By these new techniques, energy faults in building services will decrease and the energy consumption of buildings can be reduced.
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Shigeyuki MATSUOKA, Yoshio MASUKAWA, Yoshinori KIMURA
Article type: Article
Session ID: D-23
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
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We executed a measurement survey of energy consumption in two office buildings, aiming at investigating potential energy faults in office buildings. The main target of the measurement survey is the single-phase power of individual circuits in the distribution boards for electric lights that were not measured heretofore. As a result of the measurement survey, the reality of energy consumption in terminal appliances was made clear, and we were able to grasp possible energy conservation in office buildings.
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Kuniaki MIHARA, Katsuhiro MIURA, Yoshinobu ARAI, Satoshi TOGARI, Yoshi ...
Article type: Article
Session ID: D-24
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
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Indoor air mixing loss occurs in an office when the perimeter is heated by one HVAC system and the interior is cooled by the other system. The aim of this study is the quantitative analysis of the mixing energy loss in office buildings. Experiments were conducted with full-size experiment room. The result showed that it was difficult to halt the mixing loss in stable condition. Several cases of simulation were conducted to quantify the annual energy loss in a model building. The comparison of results showed that preventing the mixing loss might reduce 9 % of the thermal load of the whole building.
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Haruyuki FUJII, Junko OZAKI, Fatma MOHAMED
Article type: Article
Session ID: D-25
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
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The objective of this study is to propose a method of detecting and diagnosing faults in an architectural environmental system such as the combination of a building,the HVAC system,and the lighting system. Our final goal is to establish a method of constructing new rules for detection and diagnosis, which is not defined in advance, on-the-fly from empirical data and knowledge. This paper describes the results of preparatory studies towards a robust and reliable method. Cluster analysis is employed for fault detection and the aspect inference method is employed for fault diagnosis. We confirm that the combination the proposed method works well with artificial test data for fault detection and diagnosis.
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Haruyuki FUJII
Article type: Article
Session ID: D-26
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
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This paper proposes a method of knowledge acquisition about building environmental system from a list of measurement points in a Building Energy Management System (BEMS). The final goals is to construct a robust and flexible method of detecting and diagnosing faults in architectural environmental from BEMS data. A logical grammar is employed to parse the name of measurement point and translate it into the logical expression. A set of logical expression represents a part of architectural environmental system.Together with the ontology of physical and empirical laws about HVAC, the set is used for detection and diagnosis of faults.
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Keizou YOKOYAMA, Shin-ichi TANABE, Shin-ichi TAKAHASHI, Eisuke TOGASHI ...
Article type: Article
Session ID: D-27
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
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In this paper, to understand the behavior that the HVAC equipment showed in faulty operation, various artificial faults were generated. This data in faulty operation was collected with a remote data collection device introduced already reported.And fault diagnosis method for HVAC equipment is developed with Support Vector Machine (SVM) and BMS. By this, the early stage detection and correspondence of faulty operation become possible. It aims at the reduction in cost and time to spend on fault diagnosis.
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Haruna KOBAYASHI, Kazuo EMURA, Hideki SAKAI, Norio IGAWA
Article type: Article
Session ID: D-28
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
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We practiced .thermal measurement outdoors using solar reflective materials that have the potential to suppress heat-island effect. Solar reflectance is calculated by heat balance in one case that samples are horizontal and the other case that samples are inclined so that the angle of incidence is almost normal incidence (about 7degree).We estimate that retroreflective components are 4 to 14 percent for bead-embedded type, 17 to 19 percent for capsule-lens type, and 23 to 30 percent for prism-array type.
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Hiroshi YAMASAKI, Mamoru MIYASHITA, Yasuki MATSUKAWA
Article type: Article
Session ID: D-29
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
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We conducted experimental analyses and verification of the effects of a Drag-reducing (DR) substance that reduces the heat transportation power of air-conditioning. We confirmed the influence of the DR substance on straight and partial piping and the heat exchange performance. Moreover,we examined the amount of energy reduction and the decrease of environmental load when the DR substance is introduced into existing equipment and confirmed its effectiveness.
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Mitsutoshi FUJIKAWA, Hiroshi YOSHINO, Rie TAKAKI, Hiroyasu OKUYAMA, Mo ...
Article type: Article
Session ID: D-30
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
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An experiment for ventilation was carried out in a full-scale test house. The aim of this study was to examine the ventilation measurement method via human expiration. The adopted method is able to measure multi-zone airflow rates. Airflow rate between rooms was controlled and outdoor airflow rate was measured with the test house. The rate of outdoor airflow entering the house and the airflow rate between the rooms were estimated by the ventilation measurement method via human expiration based on system identification theory. The estimated results were compared with the measurement results in order to validate its accuracy.
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Akira YAMAUCHI, Masahiko OOSHIMA, Nakahiro NAGAKI, Kenichiro WATANABE, ...
Article type: Article
Session ID: D-31
Published: August 24, 2007
Released on J-STAGE: August 31, 2017
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As our country's energy consumption of civilian sector of institutional ure construct is increasing therefore reduce of energy consumption of heat source system is required. However, actual condition of energy utilization efficiency of heat source system of current institutional use construct are unrevealed. In this report, high accuracy heat source equipment with built in simplified thermal measurement unit will be development by measuring the differential pressure and temperature difference of the chilled/hot inletioutlet water of the absorption chiller and the result of measurement accuracy validation at the factory will be reported
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