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2000 Fiscal Year Final Research Report Summary

A Simulation Study on Radiant Cooling and Heating Systems Utilizing Thermal Storage in Building Structure

Research Project

Project/Area Number 11650611
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Architectural environment/equipment
Research InstitutionTOKYO METROPOLITAN UNIVERSITY

Principal Investigator

ISHINO Hisaya  Tokyo Met.Univ., Grad School of Eng., Prof., 大学院・工学研究科, 教授 (80150267)

Co-Investigator(Kenkyū-buntansha) KOHRI Kimiko  Utsunomiya Univ., Grad School of Eng., Assoc. Prof., 大学院・工学研究科, 助教授 (20153504)
NAKAYAMA Satoshi  Tokyo Metropolitan Univ., Grad School of Eng., Research Assoc., 大学院・工学研究科, 助手 (90264598)
NAGATA Akihiro  Tokyo Met.Univ., Grad School of Eng., Assoc.Prot., 大学院・工学研究科, 助教授 (60228020)
Project Period (FY) 1999 – 2000
Keywordsthermal storage in building structure / radiant cooling system / finite element method / unsteady state heat flow / thermal comfort / midnight service of electricity / simple calculation method / prevention of condensation
Research Abstract

Thermal storage in building structure is one of the most useful means to average energy demand and realize high efficiency of energy use. The effects of thermal storage in building structure can be expected in decrease of initial costs leaded by less capacity of air-conditioning and electrical equipment and also in decrease of running costs leaded by use of midnight service of electricity and less energy use of distribution systems. In addition to these effects, thermal comfort given by radiant cooling and the effect of radiation delay during unconditioning hours can be obtained.
At first in this study, field studies were undertaken on the library of O University in Okinawa to clear the characteristics of thermal storage in the floor for cooling, space thermal environment and thermal sensation of occupants. Surface temperature distributions of the floor cooled by chilled water were analyzed and the thermal performance of storage and radiation of the floor panel was shown. And heat extraction rates of the air-conditioning unit and the radiant floor cooling panel were quantified and the economical effects obtained by midnight service of electricity were discussed.
Precise simulation was done for furthermore analysis of storage characteristics of the radiant floor panel. The detail of 2-dimensional temperature distributions in the concrete floor slab with buried chilled water pipes were simulated by FEM model. For practical use in floor cooling and heating system analysis and design, a simplified simulation method of the step response of heat flux from the floor were developed. In this method, the response of the floor heating were obtained through the calculation of 1-dimensional thermal conduction in the floor.

  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] 後藤大輔,石野久彌 他: "蒸暑地域の図書館における深夜電力を利用した床放射冷房に関する実測研究-その1.室内環境特性-"日本建築学会大会学術講演梗概集. 1007-1008 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 平林,石野,郡 他: "蒸暑地域の図書館における深夜電力を利用した床放射冷房に関する実測研究-その2.吸放熱特性と負荷分担特性に関する考察-"日本建築学会大会学術講演梗概集. 1009-1010 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 石野久彌,郡公子 他: "躯体蓄熱床冷房システムをもつ図書館の温熱環境測定およびアンケート調査による環境評価"空気調和衛生工学会学術講演論文集. 193-196 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 石野久彌: "放射冷暖房方式の設計用熱負荷計算法の提案第3報定常計算法の拡張"日本建築学会大会学術講演梗概集. 67-68 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Hisaya ISHINO: "Research on Calculation Method of Thermal Design Load in Radiant Heating and Cooling Systems"Sixth International IBPSA Conference(BS'99). 885-892 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Daisuke GOTOH and Hisaya ISHINO et al.: "A Observational Study on Floor Cooling System Using Nighttime Low Electric Power for a Library in a Sultry Climate, Part1. Characteristics of Indoor Climate (in Japanese)"Summaries of Technical Papers of Annual Meeting, AIJ. D-2. 1007-1008 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.HIRABAYASHI, H.ISHINO and K.KOHRI et al.: "A Observational Study on Floor Cooling System Using Nighttime Low Electric Power for a Library in a Sultry Climate, Part2. Analysis of Heat Flux at Floor Surfaces and of Heat Extraction Rate by Floor Cooling System and Air-Conditioning System (in Japanese)"Summaries of Technical Papers of Annual Meeting, AIJ. D-2. 1009-1010 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hisaya ISHINO and Kimiko KOHRI et al.: "Observation of Thermal Environment and Evaluation of Environment by Questionnaire in a Library Applied Floor Cooling System (in Japanese)"Technical Papers of Annual Meeting. The Society of Heating, SHASEJ, I. 193-196 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hisaya ISHINO: "Research on Calculation Method of Thermal Design Load in Radiant Heating and Cooling Systems, Part3 (in Japanese)"Expansion of Steady State Calculation Method, Summaries of Technical Papers of Annual Meeting, AIJ. D-2. 67-68 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hisaya ISHINO: "Research on Calculation Method of Thermal Design Load in Radiant Heating and Cooling Systems"Sixth International IBPSA Conference (BS' 99). 885-892 (1999)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2002-03-26  

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