초록 ▼

Closed loop cooling is provided by means of a mechanical air conditioner combined with an air-to-air heat exchanger. Three basic modes of operation maximize cooling while minimizing energy consumption, depending on ambient air temperature. In the first mode the air-to-air heat exchanger or economize

Closed loop cooling is provided by means of a mechanical air conditioner combined with an air-to-air heat exchanger. Three basic modes of operation maximize cooling while minimizing energy consumption, depending on ambient air temperature. In the first mode the air-to-air heat exchanger or economizer provides all required cooling to a closed circuit enclosure air stream, transferring heat to the cold ambient air stream. In the second mode the air-to-air heat exchanger precools the closed air circuit stream using moderate temperature ambient air, in the same manner as in the first mode, followed by further removal of heat by passing enclosure air through refrigeration condenser coils. The heat taken in at the evaporator is transferred to the ambient air stream as it passes through a condenser coil after passing through the heat exchanger. In the third mode, only the mechanical air conditioner provides cooling, transferring heat from the closed circuit enclosure air stream to the evaporator after which it is transferred in the condenser to ambient hot air that does not pass through the air-to-air heat exchanger. A fourth heating mode can be employed if necessary under extremely cold conditions. A system of dampers and controls provides the alternate modes of cooling.

대표청구항 ▼

Closed loop cooling is provided by means of a mechanical air conditioner combined with an air-to-air heat exchanger. Three basic modes of operation maximize cooling while minimizing energy consumption, depending on ambient air temperature. In the first mode the air-to-air heat exchanger or economize

Closed loop cooling is provided by means of a mechanical air conditioner combined with an air-to-air heat exchanger. Three basic modes of operation maximize cooling while minimizing energy consumption, depending on ambient air temperature. In the first mode the air-to-air heat exchanger or economizer provides all required cooling to a closed circuit enclosure air stream, transferring heat to the cold ambient air stream. In the second mode the air-to-air heat exchanger precools the closed air circuit stream using moderate temperature ambient air, in the same manner as in the first mode, followed by further removal of heat by passing enclosure air through refrigeration condenser coils. The heat taken in at the evaporator is transferred to the ambient air stream as it passes through a condenser coil after passing through the heat exchanger. In the third mode, only the mechanical air conditioner provides cooling, transferring heat from the closed circuit enclosure air stream to the evaporator after which it is transferred in the condenser to ambient hot air that does not pass through the air-to-air heat exchanger. A fourth heating mode can be employed if necessary under extremely cold conditions. A system of dampers and controls provides the alternate modes of cooling.