Greenhouse air-conditioning system - is heated by water in buried pipes and circulates air dependent on relative humidity

摘要

The greenhouse air-conditioning system operates as a function of temp. and relative humidity. The greenhouse is heated by circulating water through pipes (6) buried in the ground, while air-conditioning is regulated by circulating air (8) inside it as a function of the internal temp. and humidity. Ventilation takes place when the internal temperature is above a first value (t1), and low-level heating by hot-water circulation when this is between this value and a lower one (t2). Air for drying is circulated when the internal relative humidity is between 80 and 100%. Further low-level heating takes place when temperature is between t2 and a still lower value (t3), while additional heating is provided by a second hot-water current when it is below t3.