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Takuya OGAWA, Saburo MURAKAWA, Daisaku NISHINA, Takahiro TANAKA, Kenta ...
Article type: Article
Session ID: F-2
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
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In this paper, we measured outdoor thermal environment and examined inhabitants' opinions for considering the relationship between the microclimate around the inhabitants' residences and their comfort. As a result, we confirmed that the higher the temperature was, the warmer the inhabitants fell. Then, we suggested the possibility that their frequencies of going out and land use around their residences were related to their comfort.
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H.B. RIJAL, Ryozo OOKA, Hong HUANG, Takeaki KATSUKI, Byoungchull OH
Article type: Article
Session ID: F-3
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
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In this research, the wind environment in the existing urban block is investigated in the isothermal and non-isothermal conditions in summer daytime (15:00) by using numerical simulation. The wind velocity of the non-isothermal condition is considerably higher than the isothermal condition. This might be a realistic prediction due to the actual thermal environment of the urban block. It can be said that the consideration of the non-isothermal is required for the wind environment evaluation of the urban block.
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Yingli XUAN, Qiong LI, Akashi MOCHIDA, Hiroshi YOSHINO
Article type: Article
Session ID: F-4
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
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Outdoor thermal environment have been seriously aggravated by urban heat island effects in recent years. Such environmental deterioration has become even more significant, especially in Asian developing countries with rapid urbanization. To provide effective solutions for unreasonable urban development, the study focuses on control indices necessary in urban planning process which can greatly affect outdoor thermal comfort. This paper clarifies effect of building height on outdoor thermal comfort, and then makes a prediction about optimized building height in built environment in high density Asian cities under humid subtropical climate.
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Tianyu XI, Yingli XUAN, Akashi MOCHIDA
Article type: Article
Session ID: F-5
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
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The outdoor thermal environment, especially the thermal environment at the pedestrian level, plays an important role on the thermal comfort and health of people. The purpose of this paper is to study the effects of semi-open space on the outdoor thermal environment of residential communities, which includes the environments of the whole community and semi-open space. This paper presents the simulation results of residential communities in the city of Guangzhou, China.
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Yuki YAMADA, Kosuke KAWADA, Nobuhiro HIRASUGA, Fumito YAMAGATA, Yuri N ...
Article type: Article
Session ID: F-6
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
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In previous report, it was showed that the temperature and the wind blew are important factors for thermal environment of station. In this study it aims to propose the method of evaluating the thermal environment of stations. In order to grasp the comfort thermal environment of stations, the characteristic of the station was grasped by comparing the results of previous conducted field surveys in various stations. In the future, this index will be available for accomplishing more comfortable stations.
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Toshikatsu UEDA, Nakaji HONDA
Article type: Article
Session ID: F-7
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
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The characteristics of HVAC systems for large spaces are that they are used for multiple purposes and that there are limitations to the sensor locations. As an HVAC control system that corresponds to these characteristics, this paper proposes a method of gam-scheduled P1D control based on a fuzzy model. This control method was applied to a VAV HVAC system for large spaces, and CFD simulation was performed for estimating its effectiveness. Results indicate that energy conservation and comfortable temperatures for occupied zones can be achieved.
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Takeshi TAMURA, Koji SAKAI
Article type: Article
Session ID: F-8
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
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The Membrane structure is expected as the insolate shading effect and a palliative effect of the heat island phenomenon for using outside shading. But, the membrane material is thin, light, and a high insolate efficiency is low. In this study, it experimented on insolation shading performance of the outside membrane and thermal insulation performance for the purpose of the development of membrane structure which contributes to the environment.
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Hiroshi SAKO, Mikio TAKAHASHI, Toshio OHKURA, Ryoichi KUWAHARA, Masaki ...
Article type: Article
Session ID: F-9
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
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This paper reports design method of office HVAC system utilizing radiant ceiling panel, natural ventilation, under floor air-conditioning. PMV control method is used for office HVAC system in order to consider radiative environment. Performance of radiant panel and acceptable dew point in office are studied. HVAC operation mode and assumed indoor thermal environment are defmed considering outside air condition and HVAC device that is energy conservation.
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Hiroyuki SOMEYA, Hiroshi SAKO, Mikio TAKAHASHI, Kouji TANAKA
Article type: Article
Session ID: F-10
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
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This paper reports plan and verification of office HVAC control system. Radiant ceiling panel needs dehumidify control that prevent from condensation surely. Performance of HVAC dehumidify is enough for operation of radiant ceiling panel in summer. Damper action is same as plan for reheat control. Control action of natural ventilation, outside air cooling, surface temperature set point's change of radiant ceiling panel is the same as plan for following load's change.
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Koji TANAKA, Hiroshi SAKO, Mikio TAKAHASHI, Hiroyuki SOMEYA
Article type: Article
Session ID: F-11
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
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This paper reports comparative verification of actual energy consumption with assumed energy consumption during design phase in an office with radiant panel combined with under floor air-conditioning system utilizing PMV control. As a result of comparison between PMV control and room temperature control, efficiency of energy saving became 9% higher by adopting PMV control.
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Masaki SHIOYA, Ryoichi KUWAHARA, Toshio OHKURA, Hiroshi SAKO, Koji TAN ...
Article type: Article
Session ID: F-12
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
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We measured the indoor thermal environment that adopted under floor air-conditioning combining ceiling radiation panel. The indoor condition became an assumed environment by controlling PMV. The temperature distribution of this environment almost becomes uniform.
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Tomoko TOKUMURA, Hiroshi SAKO, Mikio TAKAHASHI, Takuro KIKUCHI, Koji T ...
Article type: Article
Session ID: F-13
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
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This study is intended to clarify the thermal characteristics of the perimeter zone with external louvers. This report describes the results obtained from the measurement in summer and winter. In this paper the effect of external louvers in summer is shown. In addition, the availability of this system during winter is mentioned, owing to the reduction of nocturnal radiation. This paper also describes the louver angle control and visual comfort.
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Toshihiro SUZUKI, Akira KOMATSU, Sumio SHIOCHI, Tomoyuki CHIKAMOTO
Article type: Article
Session ID: F-14
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
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In this paper, the indoor thermal environment simulation had been applied by the air conditioning system design were considered. Especially the validation for the indoor thermal environment simulation had been done in a test room. In these application of Computational Fluid Dynamics, various knowhows are necessary to guarantee the calculation accuracy. The Computational Fluid Dynamics is expected to be applied to commissioning now. It is very important to establish the simulation technology with warrantable calculation accuracy, and to clarify coverage and the application level for that.
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Akira KOMATSU, Toshihiro SUZUKI, Sumio SHIOCHI, [in Japanese]
Article type: Article
Session ID: F-15
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
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Recently, the indoor thermal environment evaluation by CFD is actively done. However, because the exclusive knowledge and know-how of the load calculation are needed to obtain an appropriate evaluation result, the analysis is done by those who work full-time. Then, the indoor thermal environment evaluation tool was developed aiming to be able to do the thermal environment evaluation even if it was not those who worked full-time and to use it for the air-conditioning equipment design.
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Yumi MURAKAMI, Hirotaka UMADA, Toshikatsu UEDA
Article type: Article
Session ID: F-16
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
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When conducting CFD, calculations with the orthogonal grids system are faster as compared to the unstructured elements system, and the orthogonal grids system is suited to cases where airflow is affected by thermal convection rather than the wall shape, as with air-conditioned and heated rooms. However, it is difficult to reproduce ceiling air diffusers, which have a complex geometry. This report proposes the method of simple modeling, which reproduces the airflow distribution around ceiling air diffusers in the orthogonal grids system at practical levels. Results show comparatively close values to catalog specifications based on the mesh division method that is recommended by the proposed simple modeling.
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Shingo TANABE, Tomoaki USHIO, Noriaki MISHIMA, Toshio YAMANAKA, Hisash ...
Article type: Article
Session ID: F-17
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
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The purpose of this research is to examine the relationship between thermal comfort for office workers and indoor thermal environment in an office served by natural ventilation system. The questionnaire on indoor thermal environment was done for a one-year period. The results showed that thermal comfort range in natural ventilation corresponds with ASHRAE adaptive model and the air condition range is higher than the model. It was concluded that automatic operation in natural ventilation can bring as good thermal comfort as the manual operation system.
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Mari YAMAMOTO, Naoe NISHIHARA, Masaoki HANEDA, Gen KAWAGUCHI, Satoshi ...
Article type: Article
Session ID: F-18
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
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The mitigation of indoor temperature in offices has recently been introduced in the various countries; and the difference of the thermal environment of offices in Japan and abroad was pointed out. This study aims to organize the transition of the thermal environment of office in Japan and abroad and to compare it at the design stage with the operation stage. By the literature review, the design condition of temperature of Japanese office was kept almost constant since 1950s when air conditioning system and the condition were introduced in Japan from the US, while it was slightly raised in winter and lowered in summer afterwards in the US. According to the database of field measurements, the indoor temperature has become slightly higher in 2000s than 1980s and has been affected by social background.
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Shutarou SAKAI, Naoki AIZAWA, Kentaro KIMURA, Katsuhiko SHIBATA, Shige ...
Article type: Article
Session ID: F-19
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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Investigation of some actual conditions by the measurement become important for the correspondence to the problems such as the heat problem and the problem of increasing energy consumption that data centers have. We examine useful measurement and evaluation methods that can be applied to the practical operation through the survey in a data center during operation. In this report, we propose useful measurement methods consist of bird-eye and typical, and the result of proving the proposal method by using the result of measuring the rack surroundings in detail and the characteristic of evaluation method are described.
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Naoki AIZAWA, Shutarou SAKAI, Kentaro KIMURA, Katsuhiko SHIBATA, Masah ...
Article type: Article
Session ID: F-20
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
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We reported about the verification of the application of the proposal methods by the previous study through the parameter optimization of computer room air-conditioning system for energy conservation in the Odakyu ICT center. The bird's-eye method was able to be specified the point with hot air recirculation within the data center. The typical point method was able to be specified the hot air recirculation and evaluating thermal environment and performance by the adjustment of condition of air-conditioning system. It was confirmed that the proposal method is useful application to continuous commissioning andor timely evaluation of data center.
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Takao FUKUDA, Kousei ICHIKAWA, Kenji TAKEUCHI, Norio KUZUOKA, Masashi ...
Article type: Article
Session ID: F-21
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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In the main enumeration, the temperature and the current of air of the old model and the cold aisle type were measured, and whether the cold aisle type had become a solution of the problem of the old model was analyzed. Moreover, it was proven that the cold aisle type was energy conservation compared with the old model by the result of the temperature distribution measurement and the power consumption measurement of the air-conditioning machine.
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Yasuhira SHIMADA, Takashi YANAI, Hirohisa MIURA, Tamaki SHIMIZU, Masah ...
Article type: Article
Session ID: G-1
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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This report shows the results of energy analyses from the EMS in the office building located in the oceanfront city center. There're 3 points of analyses. 1) Energy consumption rate by use for two years. 2) Energy consumption rate of office time to various kinds. 3) Especially for air-conditioning energy, the correlation with the office time is investigated. The next reports show the operation results of control systems for air-conditioning.
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Masahiro IKEDA, Takashi YANAI, Yasuhira SHIMADA, Hirohisa MIURA, Tamak ...
Article type: Article
Session ID: G-2
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
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In the TA building with a standard air-conditioning system, operation has been optimized by continuous CX. In this paper, we report on results about the following three items that can be applied in general. 1) The optimization of the terminal pressure control of the secondary cold water pump. 2) The control action of exhaust fans and CAV to keep the air balance of a room. 3) There are an insufficient mixture of return and outdoor air as a factor that the temperature difference of return and supply cold water at air handling unit decreases.
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Tatsuhiko Yabara, Toshiya Hirakawa, Tatsuo Nobe
Article type: Article
Session ID: G-3
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
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This study was investigation for the operation status of building equipment in IBM Japan headquarters building for 38 years. Authors investigated the energy consumption from construction. Result of investigation, secular change and breakout of energy consumption for 38 years are brought out.
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Toshiya HIRAKAWA, Tatsuhiko Yabara, Tatsuo NOBE
Article type: Article
Session ID: G-4
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
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This report describes study on operation status of heat source equipment in IBM Japan head quarters building for 38 years from completion of construction. The authors researched large quantities of archive data about operation status of the building equipments and also researched archival record about repair and maintenance.
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Daisuke SAITO, Takashi INOUE, Masashi MOMOTA, Takefumi YOKOTA
Article type: Article
Session ID: G-5
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
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Through the results of long-term measurements and an analysis, air-source heat pumps, which installed in an energy efficient building, were tuned up. As a result, almost 0.1 of the primary energy COP was enhanced in annual, and importance of commissioning was reconfirmed with this report.
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Azusa Iwashima, Tatsuo Inooka
Article type: Article
Session ID: G-6
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
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This paper is a study on the internal heat of the building, e.g., occupants, lighting and OA apparatus. Lighting and OA hold about one-third of the energy consumption of the whole building, so the internal heat is an important factor for saving energy. Though the internal heat increased with recent office automation, there are only a few documents about this. Therefore, using the small button type temperature sensors, detailed actual survey about the internal heat was performed in the real office spaces.
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Iwao TAKI, Masaru NAGIHARA, Takaharu KAWASE, Masayoshi YAMAMOTO
Article type: Article
Session ID: G-7
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
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For the energy saving of buildings, it is necessary to understand the usage condition of energy and do the efficient operation of air-conditioning equipments and lightings etc. However, small buildings less than 2000m2 in total floor area seem to be still backward in saving energy, and very little data of these buildings was made public. This paper describes the subject of the energy consumption and the thermal environment of small buildings through field studies.
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Masaru NAGIHARA, Iwao TAKI, Takaharu KAWASE, Masayoshi YAMAMOTO
Article type: Article
Session ID: G-8
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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Very little data of the energy usage condition of small buildings was made public. Therefore, it is difficult to evaluate energy-saving standards and the validity of the energy usage condition. Then, we surveyed the energy usage condition of buildings less than 2000m2 in total floor area. Next, we evaluated and compared the performance of HVAC system and building skin in these buildings, and considered the priority of improvement for energy-saving performance.
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Toshimasa KAKEGAWA, Hiroki WATANABE, Eichi KUROMOTO, Hideki YUZAWA, Ta ...
Article type: Article
Session ID: G-9
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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Revising the law concerning energy for the building of a small and medium-sized scale strengthens the restriction. In this study, amount of energy conservation in plural buildings was simply totaled, managed, analyzed, and the method to promote energy-saving measures efficiently was developed. In this report, we report that simple method that forecasts and totals the conservation of energy potential are construct.
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Hiroki WATANABE, Toshimasa KAKEGAWA, Eichi KUROMOTO, Hideki YUZAWA, Ta ...
Article type: Article
Session ID: G-10
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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Revising the law concerning energy for the building of a small and medium-sized scale strengthens the restriction. In this study, amount of energy conservation in plural buildings was simply totaled, managed, analyzed, and the method to promote energy-saving measures efficiently was developed. In this report, we report on the calculation of the amount of energy conservation that uses the developed system and the methods of the total and analysis of the calculation result.
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Yoshio MASUKAWA, Katsuhiro MIURA, Kuniaki MIHARA, Shoichiro SATO, Yosh ...
Article type: Article
Session ID: G-11
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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In hydronic distribution systems, there is a lot of potential energy waste that can be cut down. For detecting these energy faults, we proposed and used performance evaluation indices on hydronic distribution system. Using these performance evaluation indices, we can evaluate the operation results of hydronic distribution systems and detect energy faults included there. This report describes the performance evaluation indices and the detection cases of energy faults on hydronic distribution systems.
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Shoichiro SATO, Katsuhiro MIURA, Kuniaki MIHARA, Yoshio MASUKAWA, Tats ...
Article type: Article
Session ID: G-12
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
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EPQ for hydronic distribution system, which was proposed in the previous paper, was studied by simulation of an actual building. The effects of settings in parameters like head and minimum frequency for pumps and pressure difference for control were evaluated and tables of EPQ_0, standard value of EPQ, were proposed.
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Shigeyuki MATSUOKA, Yoshio MASUKAWA, Yoshinori KIMURA
Article type: Article
Session ID: G-13
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
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From conventional investigation, in many cases the energy saving function of electric toilet seats is ineffective. This is regarded as energy fault about electric toilet seats. We examined some rules for detecting this energy fault, and applied measurement data of the electric toilet seats. This report describes the rules to detect the energy fault on electric toilet seats utilizing the measurement data and the detected cases by these rules in some office buildings.
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Yoshinori KIMURA, Yoshio MASUKAWA, Shigeyuki MATSUOKA
Article type: Article
Session ID: G-14
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
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In order to detect the energy fault on automatic control systems like variable volume air handling units, it is effective to grasp the set value about the automatic control system. This report describes the examination example of the method for presuming the lower limit set value about the inverter of variable volume air handling units from the observational data. By using this method, we can detect the energy fault on variable volume air handling units effectively from observational data.
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Masaki Shioya, Takehisa Yairi, Yoshio MASUKAWA, Keigo Yoshida
Article type: Article
Session ID: G-15
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
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It is important for energy saving to detect energy faults defined as a potential energy waste in building operation. However, it is very difficult even for HVAC specialists to grasp a whole structure of energy consumption because BEMS data are multi-dimensional. In this paper, we applied machine learning approaches to analyze non-specific energy faults using operation data in a real office building. As a result, this approach has a potential effectiveness in energy faults analysis.
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Keigo Yoshida, Takehisa Yairi, Masaki Shioya, Yoshio Masukawa
Article type: Article
Session ID: G-16
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
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We propose a diagnosis method for air-conditioning systems that reveals causal variables of inefficient energy consumption in a building by using sensor data taken from BEMS. In order to deal with vast amount of data, we introduce data mining and machine learning approach. Semi-supervised learning is used so as to reflect experts' knowledge to such data-driven methodologies. An experiment with a building air-conditioning system shows that our approach can offer useful information about energy faults to operators and help experts improve detection rules.
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Satoshi HIRAKAWA, Yui ITO, Yasuyuki SHIRAISHI, Noriyasu SAGARA
Article type: Article
Session ID: G-17
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
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CFD analyses were carried out for three typical cases of an office space where air-conditioning control is performed in PZ and IZ simultaneously, and thermal loss and gain caused by air mixture between two zones and heat balance at each element and zone were evaluated in details. According to the comparison result of CFD analysis and experiment, air temperature field, such as vertical distributions of air temperature, was mostly in agreement, and the tendency of thermal loss and gain in each case by CFD analysis corresponded with the experimental result.
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Yui ITO, Reika IIDA, Yasuyuki SHIRAISHI, Noriyasu SAGARA
Article type: Article
Session ID: G-18
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
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In this paper, various TYPEs of AHU models in an office space, which were the components of HVACSIM+(J) program were coupled with CFD commercial code, and case studies for supply air condition and set value of room temperature were carried based on verification of the prediction accuracy of this program. In the case of unsteady simulation, this program still had problems in respect of prediction accuracy, but it had sufficient prediction accuracy for steady simulations. For example, in a case which the distributions are produced in the indoor thermal and air environment, there is meaning using this program.
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Katsuki MAEHARA, Noriyasu SAGARA
Article type: Article
Session ID: G-19
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
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In office buildings there are generally two HVAC systems installed, one in the perimeter zone (PZ) and another in the interior zone (IZ), and the temperatures of each zone are independently controlled. To solve the problem of not being able to satisfy the requirements of room temperature control in summer and middle seasons, optimal PI parameter are selected through the simulation of its two feedback control systems with mutual interference using the models identified with the experimental data. The result shows that the system can avoid the oscillating operations using an identical PI parameter during the peak cooling periods in summer and some strategy for resetting the chilled water flow rate and chilled water temperature during low cooling load periods in intermediate seasons.
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Minoru MIZUNO, Daisuke NARUMI
Article type: Article
Session ID: H-1
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
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At present, many cities in Japan have begun to mitigate urban heat island phenomenon. Some targets are set and countermeasures against urban heat island have been planned to achieve them. But there exist many problems in it, so the realization of the targets is very doubtful. In this paper, the situation is discussed and a proposal for overcoming the problems is shown. It is a development of evaluation system of atmospheric thermal load.
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Daisuke NARUMI, Minoru MIZUNO
Article type: Article
Session ID: H-2
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
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The objectives of this study are to develop the evaluation system of thermal load on urban atmosphere for mitigating urban heat island. In this paper, we descrived the outline of the evaluation system. Through this evaluation system that proposed in this study, for example, local governments can set the concrete numerical target goal for reducing thermal load on urban atmosphere, it can be evaluated the performance and potential of various strategies for mitigating urban heat island appropriately through the index "the Weighted Thermal Load Evaluation Method" which considers the air temperature influence of the changing heat flux, it became possible to evaluate the feasibility of the countermeasure in each local governments.
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Taro MASUMOTO, Soki NAKASHIMA, Daisuke NARUMI, Minoru MIZUNO
Article type: Article
Session ID: H-3
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
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The objectives of this study are to develop the evaluation system of thermal load on urban atmosphere for mitigating urban heat island. In this paper, we developed the simplified evaluation tool for the thermal load on urban atmosphere. Through this evaluation tool that proposed in this study, it can be calculated sensible thermal load quantitatively and simply from building or ground surface. This evaluation tool was constructed by the database of sensible thermal load from building or ground surface and database of anthropogenic waste heat release. Building designers and developers who don't have any special technical knowledge can evaluate their building plan from a perspective of mitigating urban heat island.
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Soki NAKASHIMA, Daisuke NARUMI, Yohei YAMAGUCHI, Yoshiyuki SHIMODA, Mi ...
Article type: Article
Session ID: H-4
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
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The objectives of this study are to develop the evaluation system of thermal load on urban atmosphere for mitigating urban heat island. In this paper, we applied the evaluation system of thermal load on urban atmosphere and the simplified evaluation tool for the thermal load on urban atmosphere to the city where redevelopment is planned. This study show that we can estimate amount of emergence and required emission reduction of thermal load on urban atmosphere at planning phase by applying the system that proposed in this study. And the plan of countermeasures for urban heat island is more appeared in concrete from this study.
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Tomoaki TAKASE, Ikusei MISAKA, Yoichi YAMAGATA
Article type: Article
Session ID: H-5
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
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To evaluate the effects of mitigating heat island and improving thermal environment, the experiments using examination pavement with water supply system were carried out. From the results of measurements, surface temperature of water retentive pavement has lowered compared with asphalt paving. Moreover, it seems that the effect of the surface temperature decrease was different according to the kind and albedo of the water retentive block.
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Ikusei MISAKA, Tomoaki TAKASE, Yoichi YAMAGATA
Article type: Article
Session ID: H-6
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
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The results of heat balance analysis from the experiments using examination pavement with water supply system, show the latent heat consumption of evaporation at the water retentive pavements to prevent increase sensible heat. And it seems that the evaporation efficiency contribute to decrease surface temperature more important than solar reflective ability. Using evaporation efficiency and albedo as the index, it is able to evaluate the effects of mitigating heat island and improving thermal environment by water retentive pavement.
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Yoshihiro NAKAGAWA, Sumio SHIOCHI, Hiroshi TORII, Hongwei TAN
Article type: Article
Session ID: H-7
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
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Solar reflective paints are effective as the means to reduce the thermal load to the building by sunlight, and recognized as one of the means to solve heat island phenomenon. In the present study, the experiment building to compare the paint performances was constructed, and the effect of energy conservation quantified with solar reflective paints. Moreover, we made the building model including the solar reflectance, forecast the effect of energy conservation and the indoor heat environment by the simulation, and evaluated them.
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Atsushi MIYAMOTO, Takashi INOUE, Yoshihito SAKAMOTO, Masayuki ICHINOSE ...
Article type: Article
Session ID: H-8
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
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This paper presents actual performance of high-reflectivity panels by enviromental exposure test and cover performance of cloth. It was indicated that baking finishing and photocatalyst coating panels could maintain initial performance over a long period compared with conventional panels. On the other hand, spectral reflectivity and transmissivity of the clothes commercially available that influence on human thermal sensation of the exterior space. The spectral characteristic of solar shielding near infrared region is significant.
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Yuma TSUBOI, Takashi INOUE, Masayuki ICHINOSE, Hiroshi SAITO, Keiichir ...
Article type: Article
Session ID: H-9
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
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This paper presents the reduction effect of the sensible heat flux by the high reflectivity exterior panel applied to building envelope. As a result, it is shown that irradiated area of direct solar radiation to the building exterior wall is as much as to the roof. Moreover, it is shown to be able to reduce sensible heat flux effectively by applying high reflectivity panel to not only the roof but also to the exterior wall.
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Hisaya ISHINO, Kimiko KOHRI, Satoshi NAKAYAMA, Yutaka SATO, Kosei IIDA
Article type: Article
Session ID: H-10
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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The characteristics of green coverage in all prefectures in Japan were investigated by using the image data obtained from Google Earth. The relations between the green coverage ratios and population density as well as air temperature were also analyzed. The average green coverage ratio in Japan is 67%. The green coverage ratio is low in the central area of Tokyo, and Kanto region has the lowest value of 46% in all Japanese regions.
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Rongrong MA, Ryoichi KAJIYA, Koji SAKAI, Ryutaro KUBO
Article type: Article
Session ID: H-11
Published: August 18, 2009
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
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In this paper, heat balance expenditure specification is analyzed based on the experimental measurement for moss planting and grass planting. As a result for moss planting, 1) the effect of prevention from scorch crowding and heat insulation is verified, 2) because of the larger sensible heat amount, it showed great anticipated effectiveness for easing of heat-island effect and decreasing of the cooling and heating load of heat resource equipment.
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