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Kazuya ICHIJOH, Hirofumi HAYAMA, Masamichi ENAI, Koki KIKUTA
Article type: Article
Session ID: C-31
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
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It is one of the important problems to aim at the energy saving to the newly-built building, and to attempt the reduction in the operation energy by construction and the equipment repair, etc. in an existing building now However, it is a current state that the evaluation is difficult for promoting the energy saving in an existing building. Then, this research has aimed to analyze the factor of the energy consumption for the elementary school in Sapporo City.
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Tomoki OTA, Yoshiharu ASANO
Article type: Article
Session ID: C-32
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
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In the hospital, a large amount of energy is used to secure the diagnosis and treatment environment. It is important to grasp energy consumption of building, the actual situation of the building and more for energy management and energy conservation. In this paper, we investigated into the energy consumption of the hospital of shinshu university for past five years (2000〜2004). Understanding the energy consumption in the entire building finally becomes an important indicator of the energy consumption in the energy control.
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Mikiko NAKAMURA, Hidetoshi NAKAGAMI, Chiharu MURAKOSHI, Akio TANAKA
Article type: Article
Session ID: C-33
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
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This study expands on the residential energy survey of three metropolitan areas by examining residential energy consumption. Average residential energy consumption is 69 GJ/household/year, a figure that is smaller than what appears in existing literature. This is due to the fact that this study focuses on metropolitan areas, where the percentage of apartments is higher than average. Energy consumption differs according to household and lifestyle.
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Akio TANAKA, Hidetoshi NAKAGAMI, Chiharu MURAKOSHI, Mikiko NAKAMURA
Article type: Article
Session ID: C-34
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
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This study presents the present status of residential end-use energy consumption, following the "Residential Energy Consumption Survey" carried out in the three metropolitan areas. The each end-use energy consumption is split into four energy types. The results show that the energy use for "Lighting & other" and "Space Cooling" are larger and "Water heating & cooking" and "Space Heating" are smaller than existing studies results. In addition, the relations between energy consumption and household attributes or lifestyle are shown.
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Kentaro SEKINE, Ryozo OOKA
Article type: Article
Session ID: C-35
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
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This paper presents a study on lowering in cost of execution method. The execution method we propose installs the pipe in the pile first. Next the Pipe and the pipe are connected while lift the pile down to the hole. The construction costs of this execution method are about \6,000. This execution method, when it compares with the method of using experimentally, became 40% cost decrease.
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Shinya TANAKA, Yasuhiro HAMADA, Hideki KUBOTA, Makoto NAKAMURA, Kouhei ...
Article type: Article
Session ID: C-36
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
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This study describes analyses on characteristics of underground and it's thermal energy potential by using digital national land information. We made maps that show the introduction potential of the under ground thermal energy system in environs and the south of Sapporo by using geographic information system(GIS).
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Tatsunori MOMIYAMA, Yukihiro KAWAZU, Noriyoshi YOKOO, Tatsuo OKA
Article type: Article
Session ID: C-37
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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This study buried 24 copper pipes of a diameter of 20mm as underground heat exchanger in holes and, in the hot air floor heating systems which used the soil fever, grasped performance of the driving results such as the collection heat capacity or heating ability, and underground heat exchanger compared performance with a case of a polyethylene pipe. In an experiment result, the collection heat capacity became about 176.7[kJ/h] and was 40[kJ/h] higher than polyethylene-pipes. And the ability for heating became about 1600[kJ/h] and was 100[W] higher than polyethylene-pipes
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Hitoshi TAKEDA
Article type: Article
Session ID: C-38
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
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Six boxes designed to measure the mass-transfer coefficient were made, and a variety of construction materials with and without photocatalyst coating on the surface was tested. The test results show that building materials with photocatalyst coating had evaporation effects, and that the surface temperature of the experimental boxes was lower by about ten degrees centigrade and the inside temperature by about seven degrees centigrade on the average when boxes were watered than when they were not watered. It was discovered that water spraying was also effective in reducing the temperature of boxes without photocatalyst coating. The pragmatic standard mass-transfer coefficient in absolute humidity was calculated by testing various construction materials for an extended period of time. Based on the coefficient and dynamic thermal load calculation program, LESCOM-vapor, a simulation on the test boxes and building for experimental use was conducted, and figures obtained from the simulation were found to be similar to actual figures. The LESCOM-vapor program makes it possible to estimate what impact water spraying will have on the thermal environment of buildings.
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Kimiharu SUZUKI, Kazumasa OHASHI, Masayoshi KOBIYAMA, Yuichi CHONAN, T ...
Article type: Article
Session ID: C-39
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
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This research is evaluated as the performance of the environmental and the verification of the environmentalburden decrease technique introduced into the public office building that builts in the snowfall region. In this report, the effect of the snow air-conditioning system and the effect of the roof watering system are evaluated by the measurement survey of 2004 and 2005.
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Yuuki ITOH, Yasuhiro HAMADA, Hideki KUBOTA, Makoto NAKAMURA, Kouhei KU ...
Article type: Article
Session ID: C-40
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
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The purpose of this study is to establish an ice making cycle by using natural cryogenic energy which is a part of the Large Scale Utilization Model of Common Snow Dump Site through Community Collaboration. First, this paper proposes the outline of this cycle. Second, a basic experiment in a freezing compartment is shown.
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Takafumi TERASHIMA, Katsunori NAGANO, Sayaka TAKEDA, Yasushi NAKAMURA
Article type: Article
Session ID: C-41
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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Snow melting performance is increased by throwing snow into a cylinder simulated Ground Snow Melting Tank (GSMT), with mixing water in the cylinder in laboratory experiments. Field experiments are then conducted with a steel pile of 1200 mmφ. The performance is analyzed quantitatively by experiments, in which snow is shoveled periodically by a snow blower for practical use and nearly filled in the GSMT. The total amount of snow melting is around 13 t in 41 days and can be reproduced by a theoretical analysis. The analysis also predicts that two GSMTs with 30 m long are needed for one corner of a two-lane road or six residential houses in case of a ground temperature of 10℃.
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Yukiko AIHARA, Yoshiharu ASANO
Article type: Article
Session ID: C-42
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
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More pieces had been rejected in producing the lumber. These pieces could be utilized as the biomass energy in order to achieve the resources recycling in the forest. The reduction of CO_2 emission by utilizing the wooden biomass energy was evaluated. Consequently, following results were obtained. 1) The rejected pieces were 45% (167×10^3m^3) against the volume of lumber. 2) The reduction of CO_2 emission was 0.59t-CO_2/year against the lumber of 1m^3.
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Kazuhiro NAKAZAWA, Kazunobu SAGARA, Yoshiyuki SHIMODA, Hideharu NIWA, ...
Article type: Article
Session ID: C-43
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
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The DHC system in the block 3 in Nakanoshima was planned to utilize "unutilized energy", such as thermal energy of river water. This DHC system was completed in December 2004, and one year passed after it began to operate the system. This report outlines the evaluation on the efficiency of energy consumption from January 2005 to March 2006.
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Mitsuki MIURA, Kazunobu SAGARA, Yoshiyuki SHIMODA, Hideharu NIWA, Shiz ...
Article type: Article
Session ID: C-44
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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The DHC system in the block 3 in Nakanoshima was planned to utilize "unutilized energy ", such as thermal energy of river water. By using the river water, the DHC system makes it possible to improve of the efficiency of the heat pump and to ease the heat island phenomenon. This report outlines the evaluation of exhaust heat load reduction causing heat island using thermal energy of river water.
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Yujin NAM, Ryozo OOKA, SuckHo HWANG
Article type: Article
Session ID: C-45
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
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Groundwater heat pump (GWHP) system has been expected to achieve the higher coefficient of performance (COP) and more energy-saving than the conventional air-source heat pump (ASHP) system. Its performance significantly depends on the characteristics of groundwater and the underground thermal properties. Furthermore, there is a large difference of COP in utilizing groundwater between as a heat resource and as a thermal storage medium. For properties of groundwater there is suitable utilizing system. However, many of GWHP systems have not been considered sufficiently such properties. This research describes optimization of GWHP system according to the properties of groundwater based on 3D numerical heat and water transport simulation.
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Sayaka TAKEDA, Katsunori NAGANO, Takao KATSURA, Kazumi SHIMAKURA, Yasu ...
Article type: Article
Session ID: C-46
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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A steel tank which is 2.0 m by 4.5 m by 3.0 m is installed under the ground in order to examine increase of heat extraction or heat injection by ground water flow in ground thermal energy systems. One experiment with a ground water velocity of 1350 m per year shows 1.5 times higher heat extraction compared to another one without ground water flow. The ground water flow doesn't show increase of temperature on the surface of the ground heat exchanger in spite of heat charge. Reduction of thermal resistance of the ground heat exchanger will lead to higher performance in such conditions.
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Takao KATSURA, Katsunori NAGANO, Sayaka TAKEDA, Kazumi SHIMAKURA, Yasu ...
Article type: Article
Session ID: C-47
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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Field experiment on the thermal response test with ground water flow was conducted with a large-scale tank, which can imitate the ground water flow through the sand filled layer. The results demonstrated gradients of the ground temperature in the thermal response test with ground water flow are influenced by the range of the elapsed time. From the comparison between temperatures of measurement and calculations which apply the moving line source theory and the finite differential method respectively, it was indicated that the free convection is generated in the sand layer since the calculated temperature variations were larger than the measured ones. Thus the authors investigated the mixed convection.
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Kentaro MOROTA, Yoshio GOMACHI, Hiroshi OHGA, Masahiro OKURA, Takashi ...
Article type: Article
Session ID: C-48
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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In recent years, water mist cooling systems have been used in many places, and some studies on them have reported. In this report, we make clear the tendency of air temperature drop using pneumatic spray nozzles in the open air, through experiments, and compare the cost and the distribution of wet droplet of hydraulic spray system with those of pneumatic one.
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Takashi OKAMOTO, Masahiro OKURA, Kenichi METSUGI, Yoshio GOMACHI, Hiro ...
Article type: Article
Session ID: C-49
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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We have developed mist humidification system using compressed air atomizers with one control valve. The humidification system have been installed in 3 cleanrooms of semiconductor factory. We have evaluated performance of the humidification system and obtained satisfactory results. The amount of water after an atomizing period of 4 months have been about 333m^3, the amount of heavy oil reductions have been about 30.5kL, and the amount of CO_2 reductions have been 83ton-CO_2.
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Yasushi ISHIGAKI, Yohei YAMAGUCHI, Yoshiyuki SHIMODA, Minoru MIZUNO
Article type: Article
Session ID: C-50
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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The purpose of the paper is to evaluate the impact of light emitting diodes (LEDs) on energy use in an office building especially on that for air-conditioning. We carried out a case study simulation on a building model with the lighting system adopting a task & ambient lighting system using LED currently available. The results of the simulation showed that although the LED is on the preliminary stage of the technological advancement, 26% of the primary energy consumption would be reduced by the lighting system compared to the conventional lighting system. One forth of the saved energy was attributed to by the decrease in internal heat gains emitted from the lighting system.
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Shizuho OBATA, Nakaji HONDA
Article type: Article
Session ID: C-51
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
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This research aims to reduce mixing loss from the viewpoint of air-conditioning control. Feedforward control that doesn't do feedback control to perimeter zone but turns on perimeter air-conditioning energy equal to skin load is controlled. First of all, it is confirmed to be able to reproduce mixing loss in perimeter zone by CFD analysis with a feedback control, with the understand of air current, the energy of mixing loss is understood. Next, the effectiveness of this method is examined by applying feedforward control and we have compared both approaches.
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Takuji NAKAMURA, Minoru KAWASHIMA, Masaya TACHIBANA
Article type: Article
Session ID: D-24
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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A new measurement technique, which is COP ( coefficient of performance ) measurement system for packaged air conditioner in actual use is developed. We examine practical method and measure at actual building. The results show the COP is low as compared with estimated value at low load factor. And the percentage of lower load factor period is quite big. Then for the energy conversation improvement of operation and design at low load factor is significant.
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Ichiro YAMAMOTO, Mingjie ZHENG, Kanako ITO, Fulin WANG, Hiromasa YAMAG ...
Article type: Article
Session ID: D-25
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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This paper reports the results of the questionnaire survey on TAS (Testing, Adjusting and Start-up) and FPT (Functional Performance Test) for Multi-Split Type Air-Conditioner System sponsored by the Commissioning Tools Sub-Committee and the TAS/FPT Sub-Committee of SHASE. The questionnaire survey was carried out during the members of SHASE except air-conditioner manufacturers. Especially the questionnaires were delivered to the members who are engaged in designing, installing and running Multi-Split Type Air-Conditioner Systems. As a result, the questionnaire survey reveals the problems of multi-split type air-conditioner systems and points out a direction for developing tools of commissioning, which is increasingly required to conduct to ensure the performance of multi-split type air-conditioner systems.
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Shigeto ITO, Tomoaki TAKASE, Junichi KAMEYAMA
Article type: Article
Session ID: D-26
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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The characteristic of energy saving ratio of high sensible heat ratio control in simultaneous cooling and heating about multi type packaged air conditioner was measured in an office building. As the result, the energy saving ratio was 18% in a specific condition and the humidity in an office room was able to be kept necessary enough level by using high sensible heat ratio control in cooling.
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Michio NEGISHI, Hiromasa YAMAGUCHI, Kazuyasu GOUDA, Mitsuki MIURA
Article type: Article
Session ID: D-27
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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The continuous suite maintenance for the building equipment is very important for us in order to reduce the environmental load of the building. So we have to improve and optimize HVAC system, especially on the operation phase. But we have some problems for the HVAC system performance verification, the multi-split type air conditioning systems for instance. We intend to challenge standardization the quantity-of-heat measurement method and the performance verification as in house engineering issue. We have studied and confirmed the practical method of the quantity-of-heat measurement on multi-split type air conditioning system at first stage.
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Yoshihide SUWA, Yoshibumi SEKINE, Hiroshi OHGA, Satoru DOI, Yoriyuki T ...
Article type: Article
Session ID: D-28
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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An air distribution system using a hole-punching aluminum ceiling was studied to apply to the office buildings. The method to distribute air from the air-conditioning system into the plenum chamber using a cylindrical porous duct was proposed, and the details for valid design were studied using the CFD technique and the simple experiments. As the result, the difference of surface temperature in the ceiling was less than 3 degrees in centigrade. We found it possible to obtain a uniform thermal condition in the room using the proposed system.
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Hiroshi OHGA, Yoshibumi SEKINE, Yoshihide SUWA, Yoriyuki TORIGOE
Article type: Article
Session ID: D-29
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
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In this paper, a full-sized mockup of office building to experiment the performance of hole-punching aluminum ceiling air distribution system and the results of experiments are described. Using the circular duct air distributor installed in the ceiling plenum chamber, occupied zone air temperature equalization was maintained horizontally and vertically.
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Yoshiaki YAMADA, Masayuki SAKURAGI, Toshio OHKURA, Ken HONGO
Article type: Article
Session ID: D-30
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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Radiant air-conditioning system is regarded as the effective equipment from the viewpoints of thermal comfort, indoor air quality and energy conservation. Especially, we expect that the application of the system for medical facility is more useful and efficient than for other facilities. Our target of this study is to clarify the superiority of the system in comparison with the conventional systems. In this paper, we described the results of the fundamental design and annual operating simulation of the system by using existed model building. Additionally, we made a consideration on the energy conservation performance of the system.
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Kyoko SHUKU, Motoyi YAMAHA
Article type: Article
Session ID: D-31
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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Recently the floor heating system is widespread for house use. The warm water heating system of electric heat pump type is being acknowledged in that. Then, if the air-conditioning system with cool floor radiation that using the same equipment can be developed, the expansion of the system spread can be expected further more. This research examined such a possibility by experiments, simulation, and acceptability investigation.
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Kazukiyo NUMATA, Hiroshi OHGA, Gaku ISHIKAWA, Fujio TAMURA, Michihiko ...
Article type: Article
Session ID: D-32
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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In this paper, the performance of exhaust air ventilation window is described. Using air exhausted from an air exchanger, holistic energy saving ventilation window was developed. U-values and shading coefficients of the exhaust air ventilation window are presented.
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Hidetsugu SASAKI, Yasushi KONDO, Hajime YOSHINO, Jinya TAKEUCHI
Article type: Article
Session ID: D-33
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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Displacement ventilation can create better indoor air quality than conventional mixing ventilation and can also save energy. In cold climates, the heat loss at the perimeter zone may cause a cold draught along the window. This may disturb the displacement ventilation air flow and may cause uncomfortable draught feeling for the people in the room. In this paper, three types of the perimeter system are compared by experiments and CFD simulations. In Case 1, convectors were not installed in the perimeter. In Case 2, convectors were installed beside the single glass window. In addition, the applicabily of the air exhaust system through double-glass window was examined under cooling condition in Case 3. The CFD simulations were carried out with the same conditions as the experiments.
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Masayuki ICHINOSE, Takashi INOUE, Naoyoshi ICHIKAWA, Masafumi SAITO
Article type: Article
Session ID: D-34
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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This paper presents solar shading and daylighting effect of new window system combining thermotropic glass and electrochromic glass. Autonomous solar shading method using thermotropic glass was suggested and developped in the previous studies, but the problem was exposed that cloud control performance came down in the cold winter. This paper suggests cobination of electrochromic glass on thermotropic glass for supporting cloud control. For evaluating this suggestion, annual simulation was performed that involve spectral characteristics, non-steady heat condution and daylighting calculation.
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Hideki FUCHIKAMI, Hiroshi SATO, Masataka OGURA, Fujio TAMURA, Michihik ...
Article type: Article
Session ID: D-35
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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It is an important problem to prevent heat loss by stack effect. Nowadays, there is a tendency to avoid adopting revolving door because of its safety to traffic people. In this paper, the side-blow air curtain is suggested and simulated thermal environment by CFD. Compared with the result of the down-blow air curtain about air characteristic, it is found the side-blow air curtain is fairly effective to shut off invasion of outdoor air even though the blown air velocity is slower.
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Ling YANG, Shinsuke KATO, Shengwei ZHU
Article type: Article
Session ID: D-36
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
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In this paper, the coupled simulation method of convection, radiation, moisture, and Fanger's thermal neutral model is used to simulate the heat loss from a human body exposed in spot airflow supplied by a personal air-conditioner. Three cases are simulated by changing the angle of the spot airflow to the body. Based on the simulation results, the thermal adaptative effect of changing the angle of the spot airflow to the body is examined.
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Shengwei ZHU, Shinsuke KATO, Ling YANG
Article type: Article
Session ID: D-37
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
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In this study, the coupled simulation method of convection, radiation, moisture and Fanger's human thermal model is used to simulate the heat discharge of a complicated human body sat at 5 positions, which are covered in the influence of spot airflow. Based on the comparison of the analytical results in each position, the effect of the positional changing, which is considered to be one of the common thermal adaptative behaviors, is examined.
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Kouei OBATA, Shinsuke KATO
Article type: Article
Session ID: D-38
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
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We develop a personal air conditioning unit that can be installed on a desk. With consideration for variable thermal comfort levels to suit individual preference, A prototype PAC was made and subject testing was conducted to confirm the prototype to satisfy the required performance. The results of the subject testing was good and promoting the PAC future.
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Tatsuya HAYASHI, Shinsuke KATO, Tomoyuki CHIKAMOTO, Toshiharu IKAGA, S ...
Article type: Article
Session ID: D-39
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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This paper reports two new indices in order to evaluate optimization of task ambient air-conditioning system from the viewpoint of energy conservation. The combination of a personal air-conditioning unit and a typical air-conditioning system was evaluated by using these indices. It was shown that the under floor air-conditioning system was more suitable for the task ambient air-conditioning than the mixing type air-conditioning system as a result of the evaluation. The mixing type air-conditioning system became effective by devising the exhaust method.
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Tomoyuki CHIKAMOTO, Shinsuke KATO, Tatsuya HAYASHI, Osamu NAGASE
Article type: Article
Session ID: D-40
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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The energy saving effect of the ambient air-conditioning system by introducing the personal air-conditioning system is shown using CFD method. It also shows that it is possible to spend comfortably by introducing the personal air-conditioning system when working overtime and the ambient air-conditioning system stops. It will lead to the reduction in air-conditioning driving time.
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Hideki ASAMA, Shin-ichi AKABAYASHI, Jun SAKAGUCHI
Article type: Article
Session ID: D-41
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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This study described the energy consumption of Air-conditioners on the houses in niigata Prefecture. The results of the measurement is as follows: (1)The actual COP and COP of a catalog has a difference. COP of a catalog is higher than COP in actual use at cooling time. At heating time, COP of a catalog is lower than COP in actual use. (2)The rate of time while the rated electrical power condition is 80% or more. In a heating, the condition of COP is different by the houses.
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Akinori HOSOI, Takao SAWACHI, Hisashi MIURA, Yuzo SAKAMOTO, Yuji HORI
Article type: Article
Session ID: D-42
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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It is known that the energy efficiency ratio of a residential air conditioner changes according to the load ratio and outside temperature. The influence of these two factors on the energy efficiency ratio should be clarified because air conditioners are operated in a wide load ratio and outside temperature. In this paper, the fluctuation characteristic of COP was examined based on the experiment in BRI. The energy consumption and energy conservation effect were calculated by using both of the COP curve and standard heat load, the influence of the partial load on seasonal COP was analyzed. We also showed the method to lead the COP curve corresponding to the outdoor temperature and load ratio from the power consumption and output which were obtained by the experiment.
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Masahito MIKE, Masaki NAKAO, Masatoshi NISHIOKA, Minako NABESHIMA
Article type: Article
Session ID: D-43
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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The energy system simulation is often used for the conservation of energy calculation. There is the one ..characteristic type of pump.. to express the polynomial to calculate the transportation power in such a system, too. This is good for can the selection of the equipment, and to make the characteristic type again when the capacity of the equipment is changed, it becomes annoying work. Then, it is possible to calculate selecting neither the manufacturer nor the equipment to calculate the transportation power easily, and the standard characteristic type of the small, general-purpose eddy pump is made.
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Hiroyasu OKUYAMA, Yoshinori OHNISHI
Article type: Article
Session ID: D-44
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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The fan P-Q third order polynomial characteristic curve is used in an air flow network model, but the practical difficulty is to prepare the coefficients because of the almost infinite variations for fan capacity and because of the difficult extrapolation required for the curve to implement the least squares method owing to the relatively small curve range that can be referenced in manufacturer supply materials. The present paper proposes a theory and an algorithm to automatically generate the coefficients of the P-Q characteristic curve when only the design flow rate and total pressure are given. The theory is based on a similar transformation of the curve concerning the origin of the P-Q coordinates and expansion or contraction along the Q coordinate.
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Hidenobu MATSUO, Akira YAMAZAKI, Yasushi NAMATAME, Ikuo OOTAKE, Taku F ...
Article type: Article
Session ID: D-45
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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HVAC Duct consists of aluminum laminated corrugated fiberboard, which made of waste paper, was developed. This duct has several advantages such as thermal insulation, light weight and recyclable product. This report shows results of pressure distention tests, air leakage tests, condensation tests, estimation of carbon dioxide emission, and trial application.
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Yu KOGAWA, Ayako ONGA, Tatsuo NOBE
Article type: Article
Session ID: D-46
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
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This paper reports the function and performance of a chair-mounted isothermal airflow generator 2005 model called the "Cool Chair". The air is drawn in to the backrest and seat, then blown out from the armrests. Adjusting the amount of airflow and its direction is easy. The experiment was conducted with 37 adult participants and the TSV and CSV were investigate under summer office conditions in Japan (28℃ 50 % RH). The subject's psychological adjustment was verified by the repetition subjective experiment.
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Ayako ONGA, Yu KOGAWA, Tatsuo NOBE
Article type: Article
Session ID: D-47
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
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This Paper reports the result of subjective experiment. "Cool Chair" is a chair-mounted isothermal airflow generator 2005 model. It adjusts the amount of airflow and its direction easily. The Experiment was counted with 43 adult participants. When the right to adjust or control physical environment is given, it is said that the acceptability improves psychologically. Presume the condition that what is the behavior to adjust the thermal environment.
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Hisaya ISHINO, Tatuo INOOKA, Satoshi NAKAYAMA, Yasuhiro TABATA
Article type: Article
Session ID: D-48
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
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At first stage of building planning, we must consider that calculation of heating and cooling load. But, few methods for estimating the costs easily are exist. In this paper, we identified the effective factors for the costs of air conditioning units for office building by using numerical experiments based on design of experiments method. Then, we made the tables for estimation the initial costs and running costs.
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Takanori IZUMI, Hirofumi HAYAMA, Masamiti ENAI, Koki KIKUTA, Manabu KI ...
Article type: Article
Session ID: D-49
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
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Energy consumption in data centers is caused by the heat generation of equipment densely placed on racks. This study proved the effects of energy savings by examining the shapes of racks in data centers. Under the setting of under floor air conditioning, the effects of four things were examined: two different shapes of doors of the racks with or without panels. By changing the room temperature and amount of air ventilation, the different conditions in which each shape of rack worked most effectively were provided. The study also showed that the use of panels, which prevents air's backflow, was effective in any conditions.
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Eiji FUKUDA, Daisuke MATSUOKA, Takao TSUCHIYA
Article type: Article
Session ID: E-25
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
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An advantage of application of permeable roofing sheet to the outside of plywood was already confirmed when rain penetration occurs at the outside surface of the plywood. However, the advantage of the permeable roofing has not been clear yet, when moisture penetrates from the humid room such as phenomena of concealed condensation. In this paper, four types of roof assemblies were compared by hygrothermal analysis, and applicable area of the permeable roofing sheet based on climate data was studied. As a result the advantage of the permeable roofing sheet was verified when the moisture penetration from the room occurs.
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Shigeyuki YOSHIZAWA, Kae YOSHIKAWA, Tatsuo NOBE
Article type: Article
Session ID: E-26
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
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The purpose of this paper is to evaluate performance of the active insulation window. The device utilizes multi-air spaces composed of shoji paper. In this paper, it reports on the transmission of light, and on the temperature difference in device when the evaluation of ventilation performance. In the amount of the ventilation, it was strongly influenced by external wind. It was observed that the temperatures difference ventilation was done by device inside and outside temperatures difference as for time without shooting on the day. It was shown that there was high insulation efficiency by ventilation depending on the exhaust heat.
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Kae YOSHIKAWA, Shigeyuki YOSHIZAWA, Tatsuo NOBE
Article type: Article
Session ID: E-27
Published: September 05, 2006
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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The purpose of this study is to develop a new device that has indoor ventilation performance through solar heating and indoor insulation performance. In summer, it is used for ventilation. In winter, it heats a cold room by directing the solar heat into it. Experiments were conducted with the device, and ventilation performance and thermal insulation were confirmed. This paper is performance estimation of mock-up fittings by simulation.
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