噴射器對準二級壓縮--噴射復合熱泵系統(tǒng)性能的影響|最新資料

摘 要： 為了進一步改善熱泵系統(tǒng)性能和擴大其運行工況范圍，將結構簡單、無運動部件且能較好地適應兩相流工況的噴射器引入準二級壓縮熱泵系統(tǒng)，構造出準二級壓縮 - 噴射復合熱泵系統(tǒng)。在冷凝溫度為 45 ℃ 、蒸發(fā)溫度在 -8 ℃ 到 -25 ℃ 變化的不同工況下，詳細測量不同噴射系數(shù)和設計結構的噴射器對該復合熱泵系統(tǒng)性能的影響，結果表明：噴射系數(shù)和設計結構較合理的噴射器，可以使復合熱泵系統(tǒng)在較寬廣的工況范圍內(nèi)具有較高的效率，且噴射系數(shù) u=0.1 時熱泵系統(tǒng)性能最好。

關鍵詞： 熱工學；熱泵；試驗研究；噴射器

Effects of Ejector on Performances of Quasi Two-stage Compression Heat Pump System Coupled with Ejector
PANG Zong-zhan ☆ MA Guo-yuan
☆ Beijing University of Technology, Beijing 100022, China

Abstract A quasi two-stage compression heat pump system coupled with ejector was designed to improve the performance and widen the range of the operation conditions of heat pumps. An experiment for the prototype of the heat pump system coupled with ejector was conducted at a condensation temperature of 45 ℃ and evaporation temperatures from -8 ℃ to -25 ℃ . The effects of the ejectors on the performances of the heat pump were analyzed. The results show that the heat pump coupled with the ejector with optimized construction has higher coefficient of performance in a wide range of operation conditions and can achieve excellent performances while the ejecting coefficient is 0.1. 9 Ref. In Chinese.

Keywords Pyrology; Heat pump; Experimental; Ejector