高溫高濕地區太陽能煙囪土壤/空氣換熱器夏季自然通風系統實驗研究*
Experimental study on solar chimney-earth-air heat exchanger in high temperature and high humidity zones in summer
摘要：
搭建了全尺寸實驗平臺，通過測試通風量、空氣溫度、空氣相對濕度、地埋管制冷量、集熱面溫度、太陽輻照度等參數24 h內的變化，研究了高溫高濕環境下土壤/空氣換熱器（EAHE）與太陽能煙囪（SC）耦合系統的通風和冷卻能力。結果表明：盡管EAHE進口空氣的溫度和相對濕度分別為27~41 ℃和42.18%~95.58%，但其出口空氣溫度和相對濕度都較穩定，分別為27~28 ℃和90%~95%；空氣通過EAHE埋管的最大溫降為13 ℃，含濕量最大減小值為3.1 g/kg；EAHE的最大總制冷量為994 W，最大顯熱制冷量為750 W，最大潛熱制冷量為317 W，最大潛熱制冷量約占總制冷量的32%；系統最大通風量為166 m3/h，對應的太陽輻照度最大值為1 194 W/m2；該耦合系統在高溫高濕地區應用有良好的降溫性能。
Abstract：
A full-scale experimental platform is built. By testing the changes of parameters such as ventilation volume, air temperature, air relative humidity, buried pipe cooling capacity, collector surface temperature and solar irradiance within 24 hours, the ventilation and cooling capacity of the coupled system of earth-air heat exchanger (EAHE) and solar chimney in high temperature and high humidity environment is studied. The results show that although the inlet air temperature and relative humidity of EAHE are 27 to 41 ℃ and 42.18% to 95.58%, respectively, the outlet air temperature and relative humidity are relatively stable, which are 27 to 28 ℃ and 90% to 95%, respectively. The maximum temperature drop of the air passing through the EAHE buried pipe is 13 ℃, and the maximum moisture content reduction value is 3.1 g/kg. The maximum total cooling capacity of EAHE is 994 W, the maximum sensible heat cooling capacity is 750 W, the maximum latent heat cooling capacity is 317 W, and the maximum latent heat cooling capacity accounts for about 32% of the total cooling capacity. The maximum ventilation capacity of the system is 166 m3/h, and the corresponding maximum solar irradiance is 1 194 W/m2. The coupled system has good cooling performance in high temperature and high humidity zones.
Keywords:hightemperatureandhighhumidityzone;earth-airheatexchanger;solarchimney;experimentaltest;naturalventilation;coolingsystem