|18.104.22.168 Heat dissipation using fresh air|
|Table 12 provides an example of the design calculation for a fresh air cooling system with an external air temperature of 35°C and a relative humidity of 70%. Since the heat generated by the air supply fan also needs to be taken into account, the total amount of heat that must be dissipated is increased by this value.
This results in a required fresh air volume of approximately 60 m³/min for each 40' container. Some shipping companies, for example, P&O Nedlloyd, specify values of 100 m³/min in their construction regulations, since the maximum incoming air temperature in regions such as the Suez canal can be greater than 35°C. Germanischer Lloyd recommends 75 m³/min in their latest set of ventilation regulations and thus also assumes external temperatures above 35°C.
Design of an air cooling system for refrigerated
containers with mechanical air supply
Table 12: Energy equation for cooling with air
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