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Category: Refrigeration

Refrigeration

Refrigerant Replacements and the Atmosphere

Posted on January 5, 2011November 30, 2012 by admin

Refrigerants such as ammonia are used for low-temperature systems. These include food and process cooling, ice rinks, and so forth. Propane has been used for…

Refrigeration

Refrigeration Capacity

Posted on January 5, 2011November 30, 2012 by admin

Refrigeration machines are rated in tons of refrigeration. This rating indicates the size and ability to produce cooling energy in a given period. One ton…

Refrigeration

Basic Refrigeration Cycle

Posted on January 5, 2011November 30, 2012 by admin

A substance changes state when the inherent amount of heat is varied. Ice is water in a solid state and steam is a vapor state…

Refrigeration

Refrigeration from Vaporization

Posted on January 5, 2011November 30, 2012 by admin

The perspiration on your body evaporates and cools your body. Water kept in a porous container is cooled on a hot day. The water seeps…

Refrigeration

Latent Heat

Posted on January 5, 2011November 30, 2012 by admin

The heat required to change the state of a substance without changing its temperature is called its latent heat, or hidden heat. Theoretically, any substance…

Refrigeration

Heat Content

Posted on January 5, 2011November 30, 2012 by admin

Every substance theoretically contains an amount of heat equal to the heat energy required to raise its temperature from absolute zero to its temperature at…

Refrigeration

Specific Heat

Posted on January 5, 2011November 30, 2012 by admin

Every substance has a characteristic called specific heat. This is the measure of the temperature change in a substance when a given amount of heat…

Refrigeration

Temperature and Heat

Posted on January 5, 2011November 30, 2012 by admin

The production of excess heat in a system will cause problems. Normally, matter expands when heated. This is the principle of thermal expansion. The linear…

Refrigeration

Atmospheric Pressure

Posted on January 5, 2011November 30, 2012 by admin

The layer of air that surrounds the earth is several miles deep. The weight of the air above exerts pressure in all directions. This pressure…

Refrigeration

Pressure-Indicating Device

Posted on January 5, 2011November 30, 2012 by admin

Pressure-indicating devices are most important in the refrigeration field. It is necessary to know the pressures in certain parts of a system to locate trouble…

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