System design and cooling experimental study on capillary side wall and dual cold source outdoor air dehumidifier

To study the cooling performance of capillary side wall and dual cold source outdoor air dehumidifier system, designs and builds a radiant air conditioning system test bench with capillary tubes arranged on the side wall in a company conference room in Shanghai. Tests and analyses the temperature distribution, the humidity distribution, the condensation on the surface of the capillary side wall and the dehumidification performance of the dual cold source dehumidifier. The experimental results show that when the capillary side wall and the dual cold source outdoor air dehumidifier operate together for cooling, the indoor vertical temperature gradient is only about 0.5 ℃/m, and the temperature distribution is uniform, but the overall temperature is 1 ℃ higher than the design temperature. The outdoor air moisture content at the air outlet of the dehumidifier is about 7 g/kg. The indoor relative humidity range is 50% to 55%. The research also finds that the wall surface temperature is always higher than the indoor dew point temperature during the operation, so condensation doesn’t occur on the side wall surface.