Heat is a form of energy
Heat is a form of energy, there is no solid or liquid or gaseous and is not measured by weight or volume. Heat is a form of energy that can exist independently and can be moved from one place to another. It's not a question, existing in solid, liquid or gas so it can't be measured by weight or volume. It must be measured in different ways, which we will discuss later. Heat can also come from other forms of energy. For example, devices which use electricity to generate heat. This heat may build up in space, as the load on the cooling system, which should be moved out of that space.
Four types of energy light, electrical, chemical and mechanical can become heat, which we define as the cooling load. Sunlight and artificial lighting can be, and most of the heat of moving to a building. Electrical energy into light bulbs and fluorescent lighting ballast turns into heat. Transformers, electric motors, Association, and refrigerators heat. Some chemical reactions, as well as for all devices with fire and thermal energy, thus adding to the cooling load. Even people, heat production in varying degrees depending on their activity. The number of people in the zone must be considered in determining the needs in cold...
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Refrigeration 