| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To overcome problems in an air-conditioning apparatus for a plant factory that as it has high lighting load throughout the year, cooling and dehumidification unchanged throughout the year are required, but in winter of Japan, temperature difference reverses in a conventional air-conditioning apparatus applying an air-cooling system or a water-cooling system by a cooling tower when a temperature is low about an outside air temperature, which may cause troubles, further as a cooling capacity and a dehumidifying capacity are changed due to drastic temperature change of the outside air, the air-conditioning apparatus is improper to sensible heat cooling load of small fluctuation which is required for the plant factory, and furthermore it is difficult to make special efforts on energy-saving performance. <P>SOLUTION: Heat generated by cooling dehumidification is disposed of in the earth crust of about 50-100 m deep of which temperature change is small throughout the year, thus the temperature/humidity control of very high stability and quality can be performed. Further two refrigerant compressors for cooling are used for two-stage cooling, thus energy saving performance can be remarkably improved. Furthermore, the air conditioning apparatus only by a circulation type underground radiation pipe without using a refrigerating machine can be provided, by setting indoor temperature and humidity of the plant factory to a high level. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
