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Before mechanical refrigeration systems were introduced, people cooled their food with ice and snow, either found locally or b

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Introduction

Refrigeration is defined as "The process of removing heat from an enclosed space, or from a substance, to lower its pressure." (First website given in bibliography) In simpler terms, it is removing heat from states of matter in order to keep them cooler. The basic need for refrigeration is to cool food and beverages, as they often get spoilt if the temperature is high. Before actual refrigerators and other such mechanical systems were introduced, it was very common for people to cool their food with ice and snow. These materials were either gathered from the mountains, or were provided locally. For most of history, cellars were holes dug into the ground, covered with ice and lined with either wood or straw. ...read more.

Middle

The simple parts of a refrigerator include the compressor, two sets of heat exchanging pipes, an expansive valve, and the refrigerant. The refrigerant is almost always ammonia because it evaporates fast. All in all, the primary means of refrigeration is the rapid expansion of gases that are caused by cooling. The second law basically states that heat can only flow from warmer bodies to colder bodies. If not, then from a substance at a certain temperature to a temperature that is lower. This summarizes the general idea on how a refrigerator works. Economics has affected the way this device is used in several ways. A refrigerator is an essential item in almost every household today. As more are marketed, there is a demand for better quality, better efficiency, and more modern refrigerators. ...read more.

Conclusion

This may lead to food poisoning which is not only uncomfortable, but highly threatening to young children and elders with weaker immune systems. This can be controlled by keeping a regular check on perishable foods and the temperature of the fridge. CFC's are also sometimes used refrigerators as a cooling factor. This causes an environmental problem as CFC's have been known to help contribute to global warming. The ethical situation is to weigh the pros and cons of the device, for the downsides are just as important to consider. Refrigerators can link to health, social, and environment areas of interaction. A fridge makes life a bit easier for almost everyone and allows less time consumption in preparing a meal. Health wise, it prevents food from spoiling and gives it a longer life. Environmentally, it appears to be quite safe and does not require an incredibly large amount of electricity. ...read more.

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