| 摘要 |
<p>PURPOSE:To enable the space heating and cooling of a greenhouse in such a way that the entrance and exit of the pipings from a collector are connected to a receiving tank, and also the entrance and exit of the pipings from a underground stored heat exchanger are connected to said tank, and furthermore, the water-side heat exchanger for a heat pump is installed in said tank. CONSTITUTION:A water-side heat exchanger 8 for a heat pump 7 is installed in a receiving tank 6 and the air-side heat exchanger 9 for said heat pump is installed in a greenhouse. A pump 3 will operate when both collector temperature Tc and the difference Tcs between the collector temperature and underground temperature Ts come to each specified value to store the solar thermal energy obtained by a collector 2. Heat pumps 7,8,9 will operate when indoor temperature Ti comes to in the daytime a specified level or higher, and with the combined operation of a pump 5, excess indoor heat is stored underground. During the night, the greenhouse temperature will fall as outdoor temperature falls; in this case, heat is first fed into the greenhouse out of the ground; nonetheless, if the greenhouse temperature falls rapidly to a specified level or lower, the heat pumps will be operated in combination with the pump 5, bringing the thermal energy in the ground into the greenhouse while being raised in temperature, thus accomplishing the space heating of the greenhouse to an appropriate temperature.</p> |
