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On the understanding of the mean radiant temperature within both the indoor and outdoor environment, a critical review

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  • Guo, Hongshan
  • Aviv, Dorit
  • Loyola, Mauricio
  • Teitelbaum, Eric
  • Houchois, Nicholas
  • Meggers, Forrest

Abstract

Mean radiant temperature is central to our understanding of the radiant heat exchange between the human body and surrounding environment. This paper will present a review of the concept's evolution including its qualitative definition, methods of quantitative evaluation and corresponding challenges. In the process, this review suggests that more effort needs to be invested in addressing the geometric complexities of radiant heat transfer in research into MRT; the ASHRAE definition is broad and is liable to simplification, and research which uses the definition relies on a variety of simplifications, often without acknowledging the degree of geometric complexity which exists in reality. Existing means of obtaining an estimate of mean radiant temperature range from direct measurements using globe thermometers or net radiometers, to computational simulations, and are widely used for studies within indoor and outdoor environments. Previous literature studying the correlation between air temperature and MRT has found equivalence ratios, the relative importance of convection to radiation, ranging from 0.71 to 1.4, however, it is often assumed to be 1.0 in current research practices. We also identified a rapid increase in the usage of MRT in biometeorological studies during the last ten years on top of the increased usage in indoor environment sensing and modeling in light of recent developments in heating and cooling systems. Recent efforts to include the short-wave component in indoor MRT characterization have shown an increase in cooling capacity of radiant floors from 32 to 110 W/m2; significantly decreasing peak energy demand.

Suggested Citation

  • Guo, Hongshan & Aviv, Dorit & Loyola, Mauricio & Teitelbaum, Eric & Houchois, Nicholas & Meggers, Forrest, 2020. "On the understanding of the mean radiant temperature within both the indoor and outdoor environment, a critical review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 117(C).
  • Handle: RePEc:eee:rensus:v:117:y:2020:i:c:s1364032119304071
    DOI: 10.1016/j.rser.2019.06.014
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    References listed on IDEAS

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    1. Meggers, Forrest & Ritter, Volker & Goffin, Philippe & Baetschmann, Marc & Leibundgut, Hansjürg, 2012. "Low exergy building systems implementation," Energy, Elsevier, vol. 41(1), pages 48-55.
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    3. Ariane Middel & Jonas Lukasczyk & Ross Maciejewski, 2017. "Sky View Factors from Synthetic Fisheye Photos for Thermal Comfort Routing—A Case Study in Phoenix, Arizona," Urban Planning, Cogitatio Press, vol. 2(1), pages 19-30.
    4. Keutenedjian Mady, Carlos Eduardo & Silva Ferreira, Maurício & Itizo Yanagihara, Jurandir & Hilário Nascimento Saldiva, Paulo & de Oliveira Junior, Silvio, 2012. "Modeling the exergy behavior of human body," Energy, Elsevier, vol. 45(1), pages 546-553.
    5. Marcel Bruelisauer & Kian Wee Chen & Rupesh Iyengar & Hansjürg Leibundgut & Cheng Li & Mo Li & Matthias Mast & Forrest Meggers & Clayton Miller & Dino Rossi & Esmail M. Saber & Kwok Wai Tham & Arno Sc, 2013. "BubbleZERO—Design, Construction and Operation of a Transportable Research Laboratory for Low Exergy Building System Evaluation in the Tropics," Energies, MDPI, vol. 6(9), pages 1-21, September.
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    Cited by:

    1. Li, Tianying & Merabtine, Abdelatif & Lachi, Mohammed & Martaj, Nadia & Bennacer, Rachid, 2021. "Experimental study on the thermal comfort in the room equipped with a radiant floor heating system exposed to direct solar radiation," Energy, Elsevier, vol. 230(C).
    2. Wang, Nan & Ghaeili, Neda & Wang, Julian & Feng, Yanxiao & Zhang, Enhe & Chen, Chenshun, 2023. "Using architectural glazing systems to harness solar thermal potential for energy savings and indoor comfort," Renewable Energy, Elsevier, vol. 219(P1).
    3. Xuexiu Zhao & Yanwen Luo & Jiang He, 2020. "Analysis of the Thermal Environment in Pedestrian Space Using 3D Thermal Imaging," Energies, MDPI, vol. 13(14), pages 1-15, July.
    4. Ma, Nan & Aviv, Dorit & Guo, Hongshan & Braham, William W., 2021. "Measuring the right factors: A review of variables and models for thermal comfort and indoor air quality," Renewable and Sustainable Energy Reviews, Elsevier, vol. 135(C).
    5. Ernesto Antonini & Vincenzo Vodola & Jacopo Gaspari & Michaela De Giglio, 2020. "Outdoor Wellbeing and Quality of Life: A Scientific Literature Review on Thermal Comfort," Energies, MDPI, vol. 13(8), pages 1-22, April.

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