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5. INSULATION AND REFRACTORIES

5. INSULATION AND REFRACTORIES120 Bureau of Energy EfficiencySyllabus INSULATION and REFRACTORIES : INSULATION -types and application, Economic thickness of INSULATION , Heat savings and application criteria, Refractory-types, selection and application of REFRACTORIES , Heat Purpose of InsulationA thermal insulator is a poor conductor of heat and has a low thermal conductivity. Insulationis used in buildings and in manufacturing processes to prevent heat loss or heat gain. Althoughits primary purpose is an economic one, it also provides more accurate control of processtemperatures and protection of personnel.

Insulation materials can also be classified into organic and inorganic types. Organic insulations are based on hydrocarbon polymers, which can be expanded to obtain high void structures Example: Thermocol (Expanded Polystyrene) and Poly Urethane Form(PUF). Inorganic insulation is based on Siliceous/Aluminous/Calcium materials in fibrous ...

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