Development of Solar Energy Heating System UsingWater as Hot Medium in Greenhouse

摘要

In view of high heating cost on the greenhouse, authors developed solar energy heatingsystem-using water as the hot medium in the greenhouse. The whole system consists heat-collecting unit, auxiliary heating system, piping units and control units. The layout of the heatingsystem, the design of heat collecting units and heat distribution unit were introduced in this paper. Thecontrol strategy, program for control, and the automatic control method of heat-collecting unit andauxiliary heating unit were discussed in details. In order to test the performance of the system,experiments were conducted in a practical greenhouse.