Abstract
The practice of refrigerated storage design and fabrication has been subjected to many subtle changes over the time due to concerns on energy and environment, improvements of thermal and fire properties of insulation material, advancements in fabrication technology, energy efficient space planning and issues of personal/property safet1,. This paper highlights certain key aspects of planning and design of cold storages Where changes with respect to properties/construction of insulation panels, refrigeration system selection, ail tightness, in-use energy efficiency and environment considerations etc. have exerted considerable influences on the overall practice of cold room design installation and operation.
Highlights
The practice of refrigerated storage design and fabrication has been subjected to many subtle changes over the time due to concerns on energy and environment, improvements of thermal and fire properties of insuiation material, advancements in fabrication technology, energy efficient space planning and issues of personal/property safet1
The refrigeration plant is usually a separate system linked rvith the cold room through a refrigerant circuit or a secondary heat transfer fluid circuit such as glycol
The cold room is connected to the refrigeration system using a secondary heat transfer fluid pipe network
Summary
Fabrication of thermally insulated enclosure of a cold room and design of the refrigeration system involves many technical and operational considerations, some of which are interconnected. Among those some of the main considerations are i) rate of product coming in to the storage ii) resident time of the product, in case of foods ihis depend on the product texture and purpose of storage iii) allowable cooling rate that depends on nature of the product, thermal properties, moisture content and concerns about preserving flavour and freshness etc. Cold room facilities are preferred to be located away from congested areas where the cost of increased transportation could be offset by better piant lavout possibilities, while taking the advantage of lor.t'er-priced labour supply, or other economies of operation
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