Heating and Cooling Design for a Container Hut Telephone Exchange

This paper explains the design approach taken for heating and cooling an unmanned container hut, which contains electronic local switching equipment, to maintain the container hut air temperature and relative humidity within a given range. Electronic switch reliability is assured. A new small air-cooled package airconditioner, which has both a refrigerant cycle with a compressor and a thermosiphon in one body, was developed for this container hut. A field test clarified that the new airconditioner saves 20%~30% of the power needed for cooling, compared with a conventional airconditioner. Air temperature and relative humidity in the container hut are adequately controlled.