空气源热泵在西安地区的运行策略分析
Analysis on operation strategy of air-source heat pump in Xi’an area
摘要：
以西安市某空气源热泵能源站为例，介绍了其运行情况，分析了供冷、供暖季典型日运行特点，发现供冷、供暖季均存在机组长期在低效区运行、量调节不足的问题，供暖季还存在机组难以达到额定制热量的问题。针对存在的问题提出了4点改进策略：空气源热泵机组分3个系统运行；仅1个系统运行时开启1台水泵，2、3个系统运行时开启2台水泵；供暖季极端气候时采用电伴热除霜；通过人为控制回水温度调整机组出力。
Abstract：
Taking an air-source heat pump energy station in Xi’an as an example, presents its operation, analyses the characteristics of typical daily operation in cooling and heating seasons, and finds that the cooling and heating seasons have the problems of long-term unit operation in low-efficiency area and insufficient volume adjustment. In the heating season, there is still a problem that the unit can hardly reach the rated heating capacity. Proposes four improvement strategies for the existing problems: the air-source heat pump consists of three systems; when only one system is running, one pump is turned on; when two or three systems are running, two pumps are turned on; electric heat tracing is used to defrost during extreme weather in the heating season; and the output of the unit is adjusted by artificially controlling the return water temperature.
Keywords:air-source heat pump，Xi’an area, energy station, running problem，improvement strategy