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Types of domestic refrigerators
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Date: 2015-07-21
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Domestic refrigerators and freezers for food storage are made in a range of sizes. Among the smallest is a 4 L refrigerator advertised as being able to hold 6 cans of beer. A large domestic refrigerat...
Domestic refrigerators and freezers for food storage are made in a range of sizes. Among the smallest is a 4 L refrigerator advertised as being able to hold 6 cans of beer. A large domestic refrigerator stands as tall as a person and may be about 1 m wide with a capacity of 600 L. Some models for smallhouseholds fit under kitchen work surfaces, usually about 86 cm high. Refrigerators may be combined with freezers, either stacked with refrigerator or freezer above, below, or side by side. A refrigerator without a frozen food storage compartment may have a small section just to make ice cubes. Freezers may have drawers to store food in, or they may have no divisions (chest freezers).
Refrigerators and freezers may be free-standing, or built into a kitchen.
• Compressor refrigerators are by far the most common type; they make a noticeable noise.
• Absorption refrigerators units are used where quiet running is required; 
• Compressor  are powered by electricity. Absorption units can be designed to get power from any heat source.
• Oil, gas (natural gas or propane) and dual power gas/electricity units are also available.
• Solar refrigerators and Thermal mass refrigerators are designed to reduce electrical consumption. Solar refrigerators have the added advantage that they do not use refrigerants that are harmful to the environment or flammable. Typical solar designs are absorption refrigerators that use ammonia as the working gas, and employ large mirrors to concentrate sufficient sunlight to reach the temperature required to free gaseous ammonia from the solvent. Most thermal mass refrigerators are designed to use electricity intermittently. As these units are heavily insulated, cooling load is limited primarily to heat introduced by new items to be refrigerated, and ambient air transfer when the unit is open. Very little power is therefore required if opened infrequently. Refrigeration units for commercial and industrial applications can be made in various size, shape or style to fit customer needs.
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