Abstract
The combined radiant floor and fan coil cooling (RFCAFC) system is widely used due to its high comfort and large energy saving potential. In this study, as an example, the combined RFCAFC system was studied in a high humidity environment in Jinan, Shandong Province, China. Days with similar outdoor meteorological conditions were grouped, and the comfort level and other evaluation indicators. The RFCAFC had good energy efficiency and comfort when the room was in a high humidity environment. This study showed that the radiant floor surface temperature uniformity coefficient (S) fluctuated between 0.7 and 1.0. The proportion of the total cooling capacity contributed by fan coil cooling under low temperature and high humidity (LH) is 68.0%. The combined cooling system used the LH operating strategy, the PMV value fluctuated from 0.12 to 0.49. Based on this study, the following recommendations for the combined cooling system can be made: (1) When the outdoor humidity is high, the radiant floor system should be turned on early to provide cooling capacity. (2) The operation strategy of the combined cooling system must be able to respond in real time to changes in outdoor meteorological conditions to prevent discomfort in times of extreme heat or humidity.
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