摘要
空气源热泵技术是一项节能技术,推广其应用对于环境保护具有重要的意义。综述了寒冷地区用空气源热泵技术的进展,包括采用双级压缩(包括准二级压缩)和复叠循环来降低压比;采用变频压缩机在制热时加大制冷剂的循环量;采用Turbo技术、高效压缩机技术、高效换热器技术等来提高空气源热泵的低温制热性能;用电加热气液分离器以及它到压缩机之间的吸气管路,提高蒸发温度和蒸发压力等。指出空气源热泵用于寒冷地区的采暖在技术上是可行的,但是需要付出代价。在此基础上提出了一种可以充分利用室外侧换热器的复叠循环系统。
The Air Source Heat Pump （ASHP） is of great importance for energy conservation and environment protection. The latest development of ASHP for cold regions was reviewed. Some methods were introduced to solve the problem that was encountered when applying ASHP in colds regions, these includes as employing two-stage compression and cascade cycle to decrease pressure ratio, employing variable frequency compressor to increase refrigerant cycle volume, employing Turbo technology, high efficiency compressor and heat exchanger to increase low temperature heat supply, employing auxiliary electric heater to increase evaporation temperature and pressure. It is pointed out that ASHP is feasible to used in cold region for heat supply, but it needs some costs. A kind of cascade type ASHP cycle that could make good use of outdoor side heat exchanger was presented.
出处
《建筑热能通风空调》
2005年第4期24-28,81,共6页
Building Energy & Environment
