Zoning application of air-source heat pump floor radiant heating systems in China

Liu Yan, Li Chen, Zhang Chen, Lü Kailin and Yang Liu

2021.01.20

In recent years, air-source heat pump floor radiant heating technology is developing continuously, and its climate adaptability is expanding. However, the lack of performance evaluation of air-source heat pump floor radiant heating in different regions limits its application in China. Evaluates the comprehensive performance of air-source heat pump floor radiant heating systems in 41 cities of China  using two indexes of actual heating seasonal performance factor AHSPF and temperature protection rate J based on EnergyPlus. Carries out air-source heat pump floor radiant heating systems performance evaluation through the process of site selection, building load calculation, system simulation and evaluation. The results show that the air-source heat pump floor radiant heating systems perform well in hot summer and cold winter zone, and the AHSPF of multi-storey residential building varies from 3.03 to 3.88, while that of high-rise residential building varies from 3.96 to 4.83. Although the AHSPF is lower in cold zone, it can increase the indoor temperature, which has the significance of popularization. Presents the distribution of AHSPF and J by color map, and points out the shortage of air-source heat pump floor radiant heating system by analysing COP frequency distribution during heating period.