Mechanical Engineering :: Heat Transfer,Refrigeration and Air Conditioning
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The transfer of heat from one body to another takes place only when there is a temperature difference between the bodies.
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A heat exchanger with heat transfer surface area A and overall heat transfer coefficient U handles two fluids of heat capacities Cmax and Cmin. The number of transfer units (NTU) used in the analysis of heat exchanger is specified as
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Thermal diffusivity of a substance is given by (where h = Thermal diffusivity, ρ = Density of substance, S = Specific heat, and k = Thermal conductivity)
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Which of the following statement is correct for ammonia as a refrigerant?
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The wet bulb temperature at 100% relative humidity is __________ dew point temperature.
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The use of heat exchangers is made in
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In a heat exchanger with one fluid evaporating or condensing, the surface area required is least in
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Which of the following statement is correct?
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The horizontal and uniformly spaced lines on a psychrometric chart indicates relative humidity.
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The sensible heat gain is due to the __________ difference between the fresh air and the air in space.
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