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Ryuichi NISHIDA, Tsuneo UEKUSA, Shisei WARAGAI, Keisuke SEKIGUCHI
Article type: Article
Session ID: C-16
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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Indices for rating operating efficiency in equipment have existed for some time, but the need for an accurate index based on actual operating conditions has recently been felt. The annual performance factor (APF) has been stipulated as a new efficiency index for office-oriented air-cooled packaged air conditioners, but no index yet exists for air conditioners in data centers that provide cooling year-round. This paper presents a detailed analysis of actual operating conditions of data-center air conditioners and proposes an efficiency evaluation index for large-scale air conditioners in data centers.
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Makoto TAKAHASHI, Manabu KISHITA, Tuneo UEKUSA
Article type: Article
Session ID: C-17
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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This study reports on two aisle-capping methods as air-flow design technology for data centers and machine rooms with high density equipment. It experimentally examines the temperature-reduction effect and energy-reduction effect when deploying these two methods as well as the temperature-rise suppression effect at air conditioning shutdown. Calculations showed the temperature is reduced because capping makes the occurrence of the exhaust air recirculation difficult.
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Ari Yoshii, Yosuke Mino, Shisei Waragai, Tsuneo Uekusa
Article type: Article
Session ID: C-18
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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We investigated cooling efficacy of the Rack shape cooler in computer room by laboratory experimental trials. Experiments reveal that the cooler has a good effect to let down max temperature of intake air of racks which contains simulated computers. Using some evaluation index, we confirmed that the cooler can make good thermal environment for computers running. We also revealed that to use rack shape cooler have possibilities to cut down air conditioning system energy.
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Yosuke MINO, Ari YOSHII, Shisei WARAGAI, Tsuneo UEKUSA
Article type: Article
Session ID: C-19
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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Aisle-Capping is an efficient technique to control temperature of intake air of ICT equipments in data centers. With the outcome of our real-sized experiments, we've discussed the relativity between thermal condition of the equipments facing a capped cold aisle and volume of cooling air supplied into the aisle. And we've concluded the key to manage an Aisle-Capping is an adequate air volume supplied into the aisle.
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Yasuhiro KASHIRAJIMA, Takumi SUGIURA, Kenichi NAKASHIMA, Yasuhiko INAD ...
Article type: Article
Session ID: C-20
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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Basic performance and energy conservation of Natural Circulation Type Air Conditioning System for Data Center was investigated. As a result of feasibility study, energy consumption of AC system is reduced about 65% by applying high efficiency chilling unit and utilizing cold heat of outdoor air for cooling refrigerant by evaporative cooling unit. Also, as a result of experiment, it is important to manage pressure drop of refrigerant pipe for delivering refrigerant each evaporators.
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Takao Fukuda, Kousei Ichikawa, Yuichi Takemasa, Masahiro Katoh, Kenji ...
Article type: Article
Session ID: C-21
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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It is a current trend to separate cold aisles and hot aisles in planning air conditioning systems for data centers. However, there is problems various as for this method. "Cold aisle chamber air conditioning method" was designed to solve these problems, and CFD was analyzed this time.
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Takao Fukuda, Kousei Ichikawa, Kenji Takeuchi, Yukinori Sakashita
Article type: Article
Session ID: C-22
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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It can be said that restoration is early, and the air-conditioning method at the large-scale data center is dependable in air-cooled from water-cooled. In a past air conditioner however, it is not adopted for the large-scale data center. This time, to solve such a problem, a mass air conditioner was developed.
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Hirokazu NISHIDE, Kazuyoshi HARIMOTO, Miyoshi KATO, Kiyoshi Hiwatashi, ...
Article type: Article
Session ID: C-23
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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Different people have different HVAC preferences. On the other hand, people who just enter a building have different requirements from those who are already indoors on account of their different thermal conditions. We have developed a new HVAC system that can be adjusted according to individual requirements. Through FCD analysis and field measurement, we could realize a Task & Ambient area with a personal airflow outlet and achieve the cooling effect of air velocity.
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Kazuyoshi HARIMOTO, Miyoshi KATO, Masahumi SAITO, Hirokazu NISHIDE
Article type: Article
Session ID: C-24
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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We introduce energy-conservation mechanism of personal air conditioning system with personal air outlet and manipulation and control system by personal computer utilizing IP integrated network in this paper. Field survey of control system and energy evaluation was carried out. Occupants operate personal outlet units' on/off, air direction and air volume depending on personal preferences. We confirmed that conveyance power of terminal AHU can be reduced to 43% of constant air volume by interlocking control with desktop personal computer.
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Shintaro FUKUDA, Tomoyuki CHIKAMOTO, Teppei NISHIMURA, Satoshi HASHIMO ...
Article type: Article
Session ID: C-25
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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Ceiling cassette type multiple packaged unit system can control airflow direction, airflow angle and supply temperature freely. In this study, airflow control for personal region and unoccupied zone utilizing this air-conditioning system are examined. This paper shows useful data when airflow control for personal region utilizing this air-conditioning system is designed based on CFD results. It also shows that energy saving effect of airflow control for unoccupied zone utilizing this air-conditioning system by CFD.
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Tomoyuki CHIKAMOTO, Teppei NISHIMURA
Article type: Article
Session ID: C-26
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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Conventional air-conditioning systems are controlled assuming perfect mixing with the temperature of the sensor which is installed on the ceiling, wall or exhaust inlet. However, the sensor temperature will be different from the task zone temperature because of the temperature distribution in room. The difference might cause the discomfort and the waste of energy. This paper shows the thermal environment of 3 typical air-conditioning systems and energy saving effects which were conducted by CFD.
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Yohei KIHARA, Noriyasu SAGARA, Katsuki MAEHARA, Yuji RYU
Article type: Article
Session ID: C-27
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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Under Floor HVAC System with Building Structure Thermal Storage is expected to have the characteristics of both under floor systems to improve the indoor environment and the flexibility for inner partition wall settings and thermal storage systems to shift the electricity demand for HVAC systems from daytime to nighttime. Some cases of experiment were conducted to analyze the thermal performance of the HVAC system using a real scale testing apparatus. As a result, the thermal storage amounts of concrete slab are a maximum of 763 and 1061 kJ/m^2 (floor area) for 5 hours and 7.5 hours for storage respectively.
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Teruo MIKAMI, Noboru OOSHIMA, Satoru SUGITANI
Article type: Article
Session ID: C-28
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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We applied floor thermal storage system using packaged air-conditioner to the office building and evaluated the basic performance and energy consumption. As a result, we confirmed that air-conditioner keeps on operating stably during thermal storage time in case of using simply improved packaged air-conditioner. When the air-conditioner is operating, return air was cooled during coming through ceiling chamber by using thermal storage in slab and the load of air-conditioner was reduced. And, energy consumption of thermal storage system was also reduced compared with standard system.
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Yuichiro AMANO, Masanobu AONO, Yoshiyuki NAGURA, Takeshi NISHIKAWA
Article type: Article
Session ID: C-29
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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It is important for the method of leveling the electric power load to use the midnight electric power like the thermal storage system. This building in Tokushima Pref. adopts method of the electric power load leveling such as the building thermal storage system with general purpose air-conditioning equipment, in addition to the ice thermal storage system. In this study, we report the outline of the building and measurement result in summer 2007.
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Yoko KUMATA, Masashi YAMAGIWA, Kazunobu SAGARA, Toshio YAMANAKA, Hisas ...
Article type: Article
Session ID: C-30
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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Recently, the number of thermal energy storage system has increased for its economic advantage. It is difficult to estimate the actual condition of a thermal energy storage system which uses the building structure and furnitures as the heat storage material. This paper presents a calculation model for furnitures which have large heat capacities and the heat transfer model of building thermal energy storage system using the model for furnitures in a building with hybrid task and ambient air conditioning system.
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Katsunori NAGANO, Sota OKABE, Takafumi TERASHIMA, Takuji NAKAMURA, Kei ...
Article type: Article
Session ID: C-31
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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Conventionally, we have researched granulated PCM in our laboratory. In this paper, we recommend that it's useful to use lamellar PCM in terms of reducing initial cost. The purpose of this study is to characterize thermal property and heat transfer coefficient concerning lamellar PCM from fusing experiment and draft experiment. Through these experiments, we can get the value of latent heat, specific heat, convective heat transfer coefficient and overall heat transfer coefficient. When we calculate by using these values, we can confirm the compliance of the simulation.
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Katsunori NAGANO, Takafumi TERASHIMA, Sota OKABE, Takuji NAKAMURA, Kei ...
Article type: Article
Session ID: C-32
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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High rate of load shifting and comfort thermal environment are demonstrated in a floor supply cooling system utilized thermal energy storage for laminable Phase Change Material (PCM) as well as for building structure with midnight power rate. In Part1, we have investigated heat transfer coefficient experimentally in a box test. In this paper, we have conducted full scale experiment on the heat storage and heat release in actual test room. We have also shown by numerical simulation results that we can cover loads of daytime by heat storage during midnight applied 48 sheets/m^2 laminar PCM under the condition of 13℃ of supply air temperature.
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Takashi Gondo, Yuichi Takemasa, Masahiro Katoh, Hiroyuki Takasuna, Nor ...
Article type: Article
Session ID: C-33
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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This paper deals with measured results of indoor environment in a closed factory that produces high-functional materials utilizing genetically modified plants. It was found from the results that air temperature fluctuation was within 3℃ and the air velocity was 2m/s or less. What is important for environment is processing of internal heat from the artificial lighting, the design of supply outlets for an air-conditioning system and the design of the cultivation shelf.
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Yuichi TAKEMASA, Masahiro KATOH, Takashi GONDO, Hiroyuki TAKASUNA, Nor ...
Article type: Article
Session ID: C-34
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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This paper deals with a simulation model that predicts detailed indoor environment such as air temperature and airflow distributions in a closed plant factory that produces high-functional materials utilizing genetically modified plants. As the first step, air temperature and airflow distributions in condition without plants were calculated by CFD and calculated results were compared with measured results. The results of the comparisons demonstrate that the calculated air temperature and airflow distributions agree well with the measured results.
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Kazumi SAWADA, Hirotaka UMADA, Toshikatsu UEDA, Hiroshi KOJIMA, Syohei ...
Article type: Article
Session ID: C-35
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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In late years a study about the useful material production by the genetic recombination plant is prosperous in various quarters, and some development about the cultivation facility are performed, too. There is a soy bean in the one of the plant species to cultivate in such an facility. There is extremely much protein content in the crops, and the soy bean is regarded as rose color as a host plant of the useful material production. In this study, I give environment condition suitable for the growth of the recombination soy bean and plan the construction of the closedown type plant production institution to cultivate uniformly and report it about the result that examined the environment condition in CFD before construction.
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Tadayoshi SAITO, Eichi KUROMOTO, Kunihiko IWABUCHI, Yasuhide OKAMOTO, ...
Article type: Article
Session ID: C-36
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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It is well known, that one of the means of saving energy in HVAC systems is to be reduced the energy consumption for chilled water distribution, and to be hold the differential temperature of chilled water. This report mentions the experiment facility, the results of experiment and the comparison of the experimented and calculated values.
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Masaharu NAKAMURA, Masahide IMURA, Makoto HASHIMOTO, Daisuke KIGURE
Article type: Article
Session ID: C-37
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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Perimeter zones in many buildings are often running with problems in the thermal comfort and energy efficiencies. This paper will represent a new control method that may avoid such intractabilities. The method includes vendor-independent implementation of the control applications in BACnet BACS networks, solar position calculation using JPL DE405 ephemerides, window sunlit ratio with shadows of the surrounding buildings, solar transmittance of glazing and window systems, and the thermal dynamic response model of the perimeter spaces.
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Masaharu NAKAMURA, Masahide IMURA, Makoto HASHIMOTO, Daisuke KIGURE
Article type: Article
Session ID: C-38
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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Shadow on the window is the significant factor in estimating the window heat gain. This paper describes a part of the proposed perimeter control method; calculation of the window sunlit ratio with considering shadows of the surrounding buildings. The method includes solar position calculation in conforming to IERS conventions 2003 with JPL DE405 ephemerides, 3D geometric modeling of the surrounding buildings.
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Masaharu NAKAMURA, Masahide IMURA, Makoto HASHIMOTO, Daisuke KIGURE
Article type: Article
Session ID: C-39
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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The proposed control method is to provide energy into or to extract from a perimeter zone as a counterbalancing heat against the window heat gain estimated with thermal load calculations. This paper describes a part of the proposed perimeter control method; real time spliting the solar radiation into beam and diffuse, solar transmittance of glazing and window systems, thermal dynamic response model of the perimeter spaces. An applied example to the all-air systems, constant-air-volume perimeter AHU system, is also presented.
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Akihiro KATO, Toshiharu IKAGA, Shuzo MURAKAMI, Hiroaki TSUTSUI, Haruka ...
Article type: Article
Session ID: C-40
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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Indoor environment is under the influence of building operating circumstances and outdoor environment which are continuously changing in operational phase and difficult to predict. It is therefore hard to achieve optimal control of indoor environment. To cope with this problem, we developed optimal control method based on learning ability. Learning ability is a notable feature of life and it may achieve optimal determination autonomously. This paper reports the concept of the optimal control method and a feasibility study on HVAC system in intermediate season. Results of experiment indicate that developed control system reduces considerable amount of air conditioning energy consumption without worsening indoor thermal environment.
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Ryota DAZAI, Haruka UEDA, Chosei KASEDA, Hiroaki TSUTSUI, Shuzo MURAKA ...
Article type: Article
Session ID: C-41
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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A series of research including this report aims to develop the multi-objective optimal control of HVAC system based on learning ability corresponding to the environmental change. This report introduces response surface methodology (RSM) utilized to the developed system, and reports a feasibility study on start operation of HVAC in winter season. It is effective to minimize HVAC start time and to control overheating in winter season for reducing HVAC energy consumption. For the study the developed system was applied to the optimum start control of HVAC. The system achieved energy conservation by optimizing supply air temperature and the start time.
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Yukiko ABE, Yasushi KONDO, Akira MIYAFUJI, Katsuyoshi AKAGI
Article type: Article
Session ID: D-23
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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In this research, CFD can be applied to study velocity and temperature distributions, and ventilation efficiency, when the agreement of the CFD results and the experimental ones is confirmed. In order to obtain good CFD results, thermal plume over a cooking pot and capture efficiency of an exhaust hood should be reproduced by the simulation. In this paper, CFD modeling of thermal plume is discussed firstly. It is shown that simulated result is agreed well when the measured velocity of thermal plume is given in CFD simulation.
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Katsuyoshi AKAGI, Yasushi KONDO, Yukiko ABE
Article type: Article
Session ID: D-24
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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Flat type hood was studied by several researchers and its capture efficiency was evaluated as high. The researches were based on experiments and simulations under calm condition, however there exist various turbulences for thermal plume over a cooking range such as air supply of ventilation system and airflow caused by room air conditioner. The capture efficiency of hoods and indoor environment should be examined under real situation. In this paper, CFD simulation was conducted to study the capture efficiency and temperature and airflow distributions in a house kitchen with various conditions. Thermal plume model over a range proposed by the previous paper was included in this CFD. The air turbulences mentioned above were also included. The results show that the flat type hood has high efficiency and environment in island type kitchen is much more influenced by air turbulences than peninsula one.
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Jun SAKAGUCHI, Shin-ichi AKABAYASHI
Article type: Article
Session ID: D-25
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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This study shows the thermal and airflow distribution with IH-range and Gas-range on a house kitchen range by CFD analysis. The results is as follows: (1) The airflow temperature above a gas-range is higher than with an IH range by the CFD analysis. Because of this, The exhaust air volume of a Gas-range is higher than an IH range. (2) On the analysis for Living room, with a Gas-range are relatively many pollutant leaking out to the hood outside. In increased exhaust air volume of the range hood decreases the diffusion of the pollutant.
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Kazuya ITO, Hiromi KOMINE
Article type: Article
Session ID: D-26
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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The oil-mist collection efficiency of ventilation hood is one of the most important performances. The test and evaluation method is not standardized because the oil-mist characteristics emitted from various cooking was not clarified and the stable oil-mist diffuser was not devised. The emission volume and the particle size distribution of the oil-mist emitted from deep fly cooking and the emission characteristics of the invented oil-mist diffuser were reported in this paper. The diffuser emits the oil-mist of almost the same particle size distribution of deep fly cooking stably and it is suitable to a tester.
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Takahiro KUMAO, Saburo MURAKAWA, Daisaku NISHINA, Jun YOSHIDA
Article type: Article
Session ID: D-27
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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In this study, we examined the effect of heat removal when the sidewall shape of the backwall exhaust system was changed. The changeable items were length and height of the sidewall. The experiment was conducted by two kinds of load, namely, the water temperature was kept at 95℃, and another was continued with boiling. The removal efficiency of heat load was calculated, and suitable sidewall shape was analyzed. The relationship between thermal environment and sidewall shape at work position was shown. To improve the effect of heat removal, the backwall exhaust system should be designed by the sidewall of appropriate shape.
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Asako TAMURA, Kazunobu SAGARA, Toshio YAMANAKA, Hisashi KOTANI
Article type: Article
Session ID: D-28
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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Recently "island kitchen" is often installed in many show houses. In island kitchen where cooking range is placed on island unit, the range hood is sometimes mounted on a ceiling independently. However the ventilation performance of this kind of hood has not been investigated. The purpose of this paper is to discuss a plume model above residential cooking range to simulate environment of island kitchen by CFD analysis. In this paper, Capture efficiency based on CFD are compared to Capture efficiency by experiments
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Ryohei YOSHIDA, Yasushi KONDO, Hajime YOSHINO, Shunsuke OGITA, Miwako ...
Article type: Article
Session ID: D-29
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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Recently, the poor working environment of the commercial kitchen have been improved in Japan. The electrical kitchen can make such indoor environments better. However, the ventilation system of electrical kitchen is designed same as gas one. In this study, indoor conditions were measured in a casual restaurant, i.e. temperature distribution, and ventilation flow rate etc. In addition, the suitable ventilation system was examined by CFD simulations on the basis of measured data.
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Yasuto Yagi, Nobuyoshi Kiyota
Article type: Article
Session ID: D-30
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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The purpose of this study is to suggest the commercial kitchen which has comfortable working environment. This kitchen is required saving energy and money. In this paper, in order to distill the problem of kitchen, we measured temperature and humidity. And we target the commercial kitchen which is combined gas and electric cooking equipment. We report the outline of measurement and improvement of ventilation system.
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Nobuyoshi Kiyota, Yasuto Yagi
Article type: Article
Session ID: D-31
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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The purpose of this study is to suggest the commercial kitchen which has comfortable working environment. This kitchen is required saving energy and money. In this paper, in order to distill the problem of kitchen, we measured temperature and humidity. And we target the commercial kitchen which is combined gas and electric cooking equipment. We propose the reduction of ventilation and comfortable working environment.
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Shota TAKANO, Kazunobu SAGARA, Toshio YAMANAKA, Hisashi KOTANI
Article type: Article
Session ID: D-32
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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In a commercial kitchen, a large ventilation rate is needed and energy consumption can be large because a large amount of effluence of heat and moisture need to be removed. To improve kitchen condition, and save the energy, low radiation cooking equipment with concentrated exhaust was developed. In this paper, CFD simulation are carried out in order to analyze the flow and temperature fields in commercial kitchen using low radiation cooking equipment with concentrated exhaust.
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Hisashi KOTANI, Kazunobu SAGARA, Toshio YAMANAKA
Article type: Article
Session ID: D-33
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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In commercial kitchen, huge ventilation rate is needed to exhaust combustion gas and contaminant generated by cooking. To use the efficient kitchen hood is essential because of energy-saving and comfortable working environment. The purpose of this study is to develop the exhaust hood with high capture efficiency. In this paper, the influence of the baffle plate inside the exhaust hood on the capture efficiency was investigated by experiment and was also compared with the results of CFD analysis in the previous paper.
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Yuko SHIMAMOTO, Saburo MURAKAWA, Daisaku NISHINA, Masanobu AONO, Tadak ...
Article type: Article
Session ID: D-34
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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In centers of providing school lunch, adoption of electric cooking equipments is increasing. However, in these centers, the amount of ventilation is often planned larger than the required, because the standard has not been enacted. The purpose of this study is to clarify the energy saving effect of the adjustment of the amount of ventilation, based on the comparison between the conditions before and after the adjustment in the actual all electrified center constructed in 2007. As the first report, we describe the energy consumption of the main equipments for cooking, washing, ventilating, air conditioning and so on, to obtain the characteristics of energy consumption before the adjustment.
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Sakurako SOGO, Jiro TAKAHASHI, Takahiro NAGATA, Natsuko ENOMOTO
Article type: Article
Session ID: D-35
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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The report shows experiment results of energy consumption comparison between Gas Cooktops and Electric Induction Cooktops. A series of experiments have been carefully designed, conducted with equal testing conditions and thus compared. The result shows that Gas Cooktops consumed roughly 40% less energy than Electric Induction Heating Cooktops, with a reasonable consistency performed by 10 testees. The author also reported an alternative testing result using one well-experienced cook with repeating tests, showing a promising result, which may allow replacing a series of testings with 10 testees by one experienced cook test results in some particular dishes.
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Hisaya ISHINO, Shuzo MURAKAMI, Hiroshi AKASAKA, Masayuki OTSUKA, Kimik ...
Article type: Article
Session ID: OS-7
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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This paper presents the features of the latest version of the BEST. Building energy consumption can be evaluated by using the BEST which involves the simulation models for buildings and not only HVAC systems but plumbing and electric systems. The BEST is available for simulations using both of integrated models and individual model. The features of the models are summarized and the simulation results in a detached residential house are presented.
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Fumio NOHARA, Shuzo MURAKAMI, Hisaya ISHINO, Masayuki OTSUKA, Yasuo Ut ...
Article type: Article
Session ID: OS-8
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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In the "Cool Earth 50", which was proposed by Japanese prime minister Sinzo Abe at G8 Summit in Hailigendamm 2007, it is said that technological innovation is the key for the coming new era of low carbon society. The BEST can be such an innovative technology, because it has the potential to decide a goal for the sustainable future by backcasting method. In this report, an outline of a basic and/or simplified version of the BEST, which will be newly developed based on the BEST professional version, is shown. In addition, new organization of the committee on the BEST development and a result of an annual energy consumption simulated by the BEST are introduced.
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Hideyo Nimiya, Shuzo MURAKAMI, Hiroshi AKASAKA, Norio IGAWA, Kazuo EMU ...
Article type: Article
Session ID: OS-9
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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To improve the accuracy of the simulation, the calculation logic corresponding to the short time interval weather data was introduced in BEST. In this report, the property of the 1-minute interval weather data measured by Japan Meteorological Agency is described. And the adaptive smoothing of solar irradiation data and the imputation of missing values for development of 1-minute interval data are described.
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Kimiko KOHRI, Shuzo MURAKAMI, Hisaya ISHINO, Tatsuo NAGAI
Article type: Article
Session ID: OS-10
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
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This paper describes the features of the building calculation method and the outline of building simulation programs. An activity diagram of simulation procedures and class diagrams are presented to clarify the relation between simulation parts or classes.
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Hirotsugu UEDA, Shuzo MURAKAMI, Hisaya ISHINO, Kimiko KOHRI, Taito KIN ...
Article type: Article
Session ID: OS-11
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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In the BEST development, we adopt XML form as input data. Therefore, in input data acquisition, it is necessary for associating object data and XML data. This is called the mapping, and the mapping is very complex work. For improvement of this problem, we adopt JPA. In this paper, we describe the merit that the application of WA can reduce the work at the mapping.
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Taito KINOSHITA, Shuzo MURAKAMI, Hisaya ISHINO, Hirohumi HAYAMA, Kimik ...
Article type: Article
Session ID: OS-12
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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In this report, it is described that various thermal properties of many kinds of wall materials and windows were registered in a database of the BEST program and the database can be easily accessed from the program and expanded in the future due to the database constructed with XML format. Also the input screens (GUI) of the calculation conditions concerning the wall and window are shown.
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Masayuki ICHINOSE, Shuzo MURAKAMI, Takashi INOUE, Hisaya ISHINO, Kimik ...
Article type: Article
Session ID: OS-13
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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This paper presents simulation method of daylighting and solar shading for estimating energy-saving effect by day-light utilization. It is enabled to estimate energy-saving effect of daylight utilization by coupling calculation of daylight illuminance and artificial lighting output. As energy-saving performance evaluation example by a daylight utilization, test calculation results by the released BEST program are presented.
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Keisuke HIRABAYASHI, Shuzo MURAKAMI, Hisaya ISHINO, Kimiko KOHRI, Yasu ...
Article type: Article
Session ID: OS-14
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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It aims to be validation of simulation results by energy simulation tool -BEST-, this paper describes the validation method by BESTEST and various results of the case studies. In order to be recognized as an international program in the future, we must take steps to validate results of the BEST.
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Takayoshi SHIBAHARA, Shuzo MURAKAMI, Hisaya ISHINO, Kimiko KOHRI, Hiro ...
Article type: Article
Session ID: OS-15
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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The BEST takes various factors into consideration in order to calculate thermal load and to evaluate space environment more minutely and precisely than former simulation programs. This report shows how to input space information data, and explains each component put into the program such as shape of space, wall materials, thermal load factors, etc. and data input process in detail, so that the method and structure of data-input part for thermal load calculation in this program can be clearly understood.
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Tatsuo NAGAI, Shuzo MURAKAMI, Hisaya ISHINO, Hiroshi NINOMIYA, Masamit ...
Article type: Article
Session ID: OS-16
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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This paper describes simulation methodologies of HVAC systems, which are to be implemented in the "BEST" program. To achieve extensibility and ease of maintenance, modular structure is introduced. Any appliance is modeled as a module class that has formatted common functions. One of the new features of the "BEST" program is "template" structure by which effort for making input data is considerably reduced. Applicable HVAC systems and feed-back control concept for energy simulation are also discussed.
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Hiroshi NINOMIYA, Shuzo MURAKAMI, Hisaya ISHINO, Tatsuo NAGAI, Masamit ...
Article type: Article
Session ID: OS-17
Published: August 08, 2008
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
This paper presents the summary and the features of the calculation modules of HVAC system components (e.g. heat source system, heat delivery system, automatic control system, piping system, ducting system and graph utilities). The usage of modules layered structure of control modules, and calculation order of modules are also described.
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