From the perspective of improvingenergy efficiency andthermal comfortof solar heating system, theactive solar heating systemunder different stragetiesis experimented in Hezuo city, Gansu province, China in the heating season of 2018 to 2019. The conclusions revealthat without increasing energy consumption, smaller the supplyduration and the intermittent duration, higher the heating efficiency. The living room air temperature,average heating rate and cooling rateof the kang surfacetemperature change more slowly. Regardingthe on-off time ratio of 50%, the optimal strategy of the system areto combine 15/15min mode with variable flow mode B to ensure the systemownhigh energy efficiency and well thermal comfort.
Keywords solar heating system, on-off modes, heating efficiency, variable flowmode, temperature change