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How does refrigeration preserve food?
Refrigeration helps in preserving fruits and vegetables by storing at low temperatures to slow down decay and natural metabolic processes. Similarly, ice cream, other dairy products, bakery products and beverages need to be stored at low temperatures for long term use.
Why and how refrigeration and freezing can help preserve food from spoiling?
Freezing delays spoilage and keeps foods safe by preventing microorganisms from growing and by slowing down the enzyme activity that causes food to spoil. As the water in the food freezes into ice crystals, it becomes unavailable to those microorganisms that need it for growth.
Does refrigeration prevent bacterial growth?
As consumers, we should notice no difference. Refrigeration slows bacterial growth. Bacteria grow most rapidly in the range of temperatures between 40 and 140 °F, the “Danger Zone,” some doubling in number in as little as 20 minutes. A refrigerator set at 40 °F or below will protect most foods.
How does refrigeration compressor work?
The compressor works by increasing the pressure and temperature of the vaporized refrigerant. There are different types of compressors for refrigeration applications. Reciprocating, rotary, and centrifugal compressors are the most common among refrigeration units.
Why is a compressor used in refrigeration?
The compressor is used in commercial refrigeration by letting the refrigerant run the circuit. The compressor plays a role in the system like a heart in a living creature’s body. The power comes from the electric motor fixed in the system. This process eases the pressure on the refrigerant’s system.
How does refrigerator affect the environment?
The halocarbons in refrigeration appliances contribute to the greenhouse effect. These gases prevent heat escaping from the earth and deplete the ozone layer that filters the sun’s rays. The greenhouse effect and ozone layer depletion contribute to global warming.