• thermal performance of envelope wall/roofs of intermittent air-conditioned rooms

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/01/01
    • تاریخ انتشار در تی پی بین: 1392/01/01
    • تعداد بازدید: 720
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     the thermal performance of six wall/roof configurations in an intermittent air-conditioned room, in a climate where the outdoor temperature or the sol–air temperature swing crosses the thermal comfort zone, was numerically evaluated. the intermittent air-conditioning system operates heating or cooling. when operating for cooling it is turned on when the indoor temperature is greater than the upper comfort temperature and when operating for heating it is turned on if the indoor temperature is smaller than the lower comfort temperature; otherwise it remains off. a one dimensional heat transfer model with periodic outdoor conditions was considered. the parameters used to evaluate the configurations are the energy for the on-periods and a thermal index during the off-periods. for comparison purposes, the wall/roof configurations were also evaluated in an air-conditioned room where the temperature was kept constant full time. the results show that the thermal evaluation of a wall/roof must be done taking into account the operation condition of the air-conditioning system.

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