基于吸收式制冷和除湿溶液再生的复合冷源系统

Combined Cold Source System Based on Absorption Refrigeration and Regeneration of Liquid Desiccant

结合吸收式热泵和溶液除湿技术特征,提出了基于吸收式制冷和除湿溶液再生的复合冷源系统。以中央空调常规冷源系统为比较基准,分析了新型复合冷源系统的年供冷性能系数、供冷成本和减排效益。案例分析结果表明,当输冷距离为5km,废热价格为 20元/GJ 时,新型复合冷源系统的年供冷性能系数达23.9,供冷成本为115.6元/GJ。与常规冷源系统相比,新型复合冷源系统年供冷性能系数提高了175%,供冷成本降低了33%,年电耗量降低了77%,可实现深度利用工业废热,大幅降低电网夏季负荷压力。新型复合冷源技术为高效供冷和工业废热深度利用提供新思路。

In combination with the characteristics of absorption heat pump and solution dehumidification,this paper presents a new cold source system based on combined absorption refrigeration and dehumidification solution regeneration. With the conventional cold source system of the central air-conditioning system as comparison benchmark,the annual system coefficient of cooling performance(ASCOP),cooling cost and effect of emission reduction of the new composite cold source system are analyzed. Results of case analysis show that,when the cooling transmission distance is 5km and the waste heat price is 20 Yuan/GJ,ASCOP and cooling cost of the new combined cold source system is about 23.9 kW/kW and 115.6 Yuan/GJ,respectively. Compared with the conventional cold source system,the ASCOP of the new combined cold source system is increased by 175%,the cooling cost reduced by 33%,and the annual electricity consumption reduced by 77%. Thus the new combined cold source can achieve deep utilization of industrial waste heat to substantially reduce the load burden of power grid in summer. The new combined cold source can provide new ideas for efficient cooling and deep utilization of industrial waste heat.