Cooling load calculations of radiant and all-air systems for commercial buildings

Eleftherios Bourdakis, Fred Bauman, Stefano Schiavon, Paul Raftery, Bjarne W. Olesen

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    Abstract

    The authors simulated in TRNSYS three radiant systems coupled with a 50% sized variable air volume (VAV) system and a 50% sized all-air VAV system with night ventilation. The objective of this study was to identify the differences in the cooling load profiles of the examined systems when they are sized based on different levels of the maximum cooling demand. The authors concluded that for high thermal mass radiant system nocturnal operation was adequate for providing an acceptable thermal environment even when the radiant system was sized based on the 50% of the maximum cooling demand. The 50% all-air system alone was able to provide comfort if night cooling was implemented. On the other hand, radiant cooling panels (low thermal mass) should be operating during the occupancy period. When sizing a high thermal mass radiant cooling system, the effect of thermal inertia and the response time should always be taken into account.
    Original languageEnglish
    Publication date2017
    Number of pages10
    Publication statusPublished - 2017
    EventBuilding Simulation 2017: The 15th International Conference of IBPSA - San Francisco, United States
    Duration: 7 Aug 20179 Aug 2017
    Conference number: 15

    Conference

    ConferenceBuilding Simulation 2017
    Number15
    Country/TerritoryUnited States
    CitySan Francisco
    Period07/08/201709/08/2017

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