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Continuous Duty and Distribution Facilities
Cold storage facilities use refrigeration heat exchangers as evaporators, condensers and secondary loop interfaces, running essentially without interruption.
Continuous duty rewards efficiency. A close approach that saves a small amount of compressor work each hour becomes a large number over a year of continuous operation.
Reliability over first cost. Downtime in a cold store has immediate consequences for stock. Serviceable construction, spare gaskets on site and a maintenance schedule are worth more than a lower purchase price.
Heat recovery. A facility rejecting heat continuously and buying hot water for washdown and defrost is an obvious recovery candidate, and the numbers are usually straightforward.
Typical Specification
- Operation: Continuous duty
- Efficiency: Small approach savings compound annually
- Construction: Semi-welded for ammonia, brazed or gasketed for halocarbon
- Reliability: Serviceable construction and on-site spares
- Heat recovery: Condenser heat into washdown and defrost water
- Secondary loops: Glycol interfaces to air units
- Materials: Selected against secondary fluid and water chemistry
- Maintenance: Scheduled regasket and inspection
- Monitoring: Approach temperature trended as a fouling indicator
- Expansion: Frames specified with room where growth is expected
Common FAQs
Because the plant runs continuously. A small reduction in compressor work each hour becomes a substantial annual saving when there are no idle periods to dilute it.
Yes. Downtime has immediate consequences for stock, and a spare gasket set on the shelf converts a potential crisis into a scheduled task.
Usually. A facility rejecting heat continuously while buying hot water for washdown and defrost is close to an ideal recovery case, and the arrangement is straightforward.
Related
Ammonia Systems
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Glycol & Secondary Loops
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