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What Is Cold Storage?

Foods can be stored in plastic containers on a temporary basis in cold storage.
Resealable plastic bags can be used to temporarily preserve food.
When it comes to cooling food items at an industrial level, different refrigerants are used, including anhydrous ammonia, carbon dioxide, and propane.
Refrigerators are one type of cold storage used to keep food from spoiling.
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  • Written By: Dan Cavallari
  • Edited By: Bronwyn Harris
  • Last Modified Date: 04 December 2014
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The term "cold storage" refers to the storing of goods in a refrigerated atmosphere. This means heat is removed from the storage container or room to help keep items — often food — fresh for delivery, long- or short-term storage, and so on. Cold storage helps prevent spoilage of foods and other items meant for consumption, and it can be used in a variety of other settings, such as hospitals, warehouses, and anywhere else that stores products in need of preservation. When transporting goods, refrigeration trucks are often used to keep items cold throughout the transportation process.

The room or containment system in which items are stored for cold storage must be insulated properly for several reasons: the insulation helps maintain a particular temperature within the storage unit; it helps prevent cool air from escaping the unit, which would otherwise lead to higher refrigeration costs and energy waste; and it helps prevent the temperature outside of the storage unit from fluctuating. In many cases, the temperature within a cold storage unit can be manipulated by adjusting a thermostat; a cooling unit will then blast cold air into the unit, or turn off to allow the temperature to rise.

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Cold storage units designed for transporting goods can be hooked up to trucks. The trailer unit will feature a cooling unit, and the trailer itself will be well insulated to ensure a constant cold temperature regardless of how long the trip lasts. A generator may be necessary to power the cooling unit, and packing procedures should facilitate easy cooling of products being transported. This method is commonly used to transport perishable foods, flowers, meats, and even human organs intended for transplant. Blood is also refrigerated during transport so it can be used later for blood transfusions.

Home refrigerators can be considered cold storage units as well. Refrigerators are used to prolong the life of foods to be eaten, and they prevent spoilage of perishable foods. In the past, ice boxes were used instead to keep food cold, but this method was inefficient as regulating the temperature of such structures was often difficult. Some types of ships feature cold storage units in which temperatures can be regulated; in the past, fish that were caught were stored in containers filled with ice, and the ship would have to return to port before the ice could melt and allow the fish to spoil.

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browncoat
Post 3

@umbra21 - Still I'm very happy they did invent a way to keep things consistently cold, as a lot of medical science depends on the ability to maintain temperatures as well. Cold storage is used for cell samples and donated blood, vaccines and a lot of other things I wouldn't want to do without.

umbra21
Post 2

@Iluviaporos - There are still a lot of places in the world where the average household doesn't have electricity, let alone a fridge or freezer. There are other ways of keeping food cool. Root cellars, for instance, were a common addition to the house once. Ice boxes were relatively recent and aren't really used by anyone anymore.

Cold water is often provided in hot countries by putting warm water into an unglazed jar and letting it sweat, which draws the heat out of it. You can use that same trick to make a DIY fridge when you're camping.

And fresh food is something that we all expect to have access to these days, but it was once a luxury. Food preservation doesn't depend on cold storage after all. Smoke, salt and drying techniques have worked for generations.

lluviaporos
Post 1

The fact that cold storage is such a recent invention is such a strange thing to consider for someone who takes it for granted. Even just a hundred years ago there was no way to store fresh food and no way to transport it.

When I think about all the things we've got stuffed into our fridge and freezer at the moment, it astonishes me that people once lived without that convenience at all levels of society. It must have been one of the linchpins of modern society, in fact, since so much depends on portable cold storage economically.

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