On-site measurement and analysis of distribution energy efficiency of centralized heat pump heating systems

Presents the measurement results of distribution energy efficiency of thirteen centralized heat pump heating systems in a city in cold zone of China. Compares the rated energy efficiency ratios of distribution systems of these projects with measured ones. Analyses the energy consumption percentage of main chillers, heat source water distribution system and hot water distribution system. Summarizes the typical problems resulting in higher energy consumption of distribution system including large flow rate and small temperature difference, low operational efficiency of pumps and large pipeline resistance. Puts forward some suggestions to improve the distribution energy efficiency of centralized heat pump heating systems.