Problems in improvement of central heating systems in China and possible solutions

Analyses the main reasons for lower heating efficiency and over high operating energy consumption in the central heating systems and discusses current heating reform turning unit building area based charging system into household heat metering and charging. Considers that it may not suitable for Chinese living situations.  It should be taken to measure the heat on every building heat entrance and allocate the cost to each household according to its building area. This fashion can prompt envelop thermal insulation improvement, and be possible in technological and economical aspects. In order to solve the unbalance problem and increase the system efficiency of central heating, proposes installing mixing pumps or heat exchangers at the heat entrance of each building. “Large circulation flow rate with small temperature difference and low supply temperature” can be used to operate in the building internal system and “small circulation flow rate with large temperature difference” can then be used in the central heating network outside buildings, so that solve the unbalance problem in central heating systems caused by poor matched radiators, existence of indoor heat source and uneven circulation flow rate, and increase system efficiency much more.