Operational costs for storage
Cooling load will include some or all of the following elements:
- Reasonable: i.e. cooling liquids or solids
- Latent: i.e. freezing
- Warm breath: vegetables, fruit and other
- Insulation: i.e. heat gain through the walls, ceiling and floor
- Infiltration: the flow of air through the cold store doors and hatches
- Assistive devices: evaporator fans, pumps, lighting
- Other: people and trucks in refrigerating chambers and other
If the product at a temperature of storage on arrival and then first two will be minor. Isolation and infiltration will be the main source of heat load, and both are depending on the storage temperature. Efficiency or COP of the system depends on the temperature of the Elevator, and the lower the storage temperature, the greater the lift must be. While low temperatures are useful for a product, there is a compromise in relation to operating costs. The graph in Fig. 15.1 illustrates typical characteristics power consumption for the same amount of cooling in another storage temperature medium-sized environments.
But stored at low temperatures the amount of cooling more, because the heat infiltration, usually more. Power costs can be 50% higher in 30C compared with 15C. in addition, the compressor capacity is lower in the lower boiling point and larger plant will incur additional costs for capital.
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Cold storage 