污水源热泵系统输送能耗分析

Energy consumption analysis of transportation for sewage-source heat pump systems

污水源热泵的系统形式和运行方式对系统能耗有重要影响。介绍了一机一泵式、大并联式和混合式3种系统形式及各自的优缺点。以2，3，4台压缩机的热泵系统为例，建立了各种系统形式下不同运行方式的能耗模型。计算了一机一泵式系统不同运行方式的输送能耗比。结果表明，系统在不同负载下，相比于定流量运行，并联耦合运行的能耗降低1．8％～17．6％，变频运行的能耗降低3．1％--24．8％，为污水源热泵系统设计提供参考。

System form and operation mode of the sewage-source heat pump system impact significantly on the system energy consumption. Presents three system forms, namely one unit connected one pump system, parallel system and hybrid system, and points out their advantages and disadvantages respectively. Taking the heat pump systems with two, three and four compressors as examples, sets up the energy consumption models under different operation modes of different systems. Calculates the energy consumption ratio of one unit connected one pump system under different operation modes. The results show that under different loads, energy consumption of parallel coupling operation mode and inverter operation mode is reduced by 1.8% -17.6% and 3.1%-24.8% respectively, compared with the constant frequency operation mode, providing the references for design of the sewage-source heat pump system.