Solar heating system for greenhouse - uses water flowing through buried pipes to heat ground and radiator with fan gives warm air circulation

摘要

The greenhouse is heated by means of water circulating through pipes buried in the ground. these run under both the cultivated and the non-cultivated areas, the latter forming a reserve of heat for use during the night. solar panels heat the water, this being collected in a header tank and provided with temperature control. An electric pump circulates the water, circuit control valves being provided. A radiator is fitted in the roof space, a fan being used to blow air over coils heated by water from the same circuit. this gives space heating if sudden low temperatures are encountered.