Underground emergency refuge chambers need provide a safe living environment for refugees, however, the temperature and humidity control of the living environment has become a difficult problem due to the event of a power outage after a disaster. This article developed an ice storage air conditioner with a volume of 1 m3 to cool compressed air, providing a new option for temperature and humidity control in refuge chambers. By building an ice storage air conditioner performance test platform, the ice storage, cooling and dehumidification performance of the air conditioner were tested. Then, based on the orthogonal experimental principle, the influence of inlet air parameters including speed, temperature and relative humidity on the cooling and dehumidification performance of the device was analyzed. The results show that: (1) The ice storage function can be completed by freezing the ice to below -15 ℃ within 60 h. (2) The degree of influence of each factor on the cooling and dehumidification performance is as follows: inlet air velocity > inlet air temperature > inlet air relative humidity. (3) The dehumidification efficiency of the ice storage air conditioner decreased by 12.81 % and the cooling efficiency decreased by 14.11 % when the inlet air velocity increased from 5 m/s to 15 m/s. (4) After 96 h of testing, the outlet air temperature of the ice storage air conditioner is less than 23 ℃, which can meet the cooling and dehumidification requirements of 15-person in a refuge chamber with an initial surrounding rock temperature of 30 ℃.
|Journal||International Communications in Heat and Mass Transfer (ICHMT)|
|Publication status||Published - 29 Jun 2023|