3. A 120 W system is used to maintain a plate of 0.2 m´ area at a temperature of 60° C when the surroundings are at 30°C temperature. What fraction of heat supplied is lost by natural convection? It may be presumed that convection 0.2, coefficient conforms to the relation h 2. 5(AT)"w/m°K.
3. A 120 W system is used to maintain a plate of 0.2 m´ area at a temperature of 60° C when the surroundings are at 30°C temperature. What fraction of heat supplied is lost by natural convection? It may be presumed that convection 0.2, coefficient conforms to the relation h 2. 5(AT)"w/m°K.
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Subject: Thermodynamics and Heat Transfer
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3. A 120 W system is used to maintain a plate of 0.2 m´ area at a temperature of
60° C when the surroundings are at 30°C temperature. What fraction of heat
supplied is lost by natural convection? It may be presumed that convection
0.2.
coefficient conforms to the relation h = 2.5(AT)"“W/m´K.
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