| Abstract: | The application of air cooled condensers in European supermarket refrigeration systems is discussed. Compressors are usually hermetic or open types with capacities in the 5 kW range. Advantages over water-cooled systems are lower initial and operating costs and easier maintenance. There are, however, a number of problems, primarily sensitivity to ambient air temperatures which causes high condensing temperatures in hot summer weather and consequently a substantial increase in energy demand. Problems can also arise when the air temperature falls below 0°C; the condensing pressure must be maintained by fan speed control, air flow control or reduction of active heat transfer surface by flooding. |
