Mechanical Engineering :: Heat Transfer,Refrigeration and Air Conditioning
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According to Prevost's theory of exchanges, every body irrespective of its temperature continuously emit heat radiations to the surrounding bodies and at the same time receives heat radiations from the surrounding bodies.
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In a boot-strap air evaporative cooling system, the evaporator is provided
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According to Stefan-Boltzmann law, the total radiation from a black body per second per unit area is directly proportional to the
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A good refrigerant should have
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The thermal diffusivity for gases is generally __________ those for liquids.
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The condition of refrigerant after passing through the expansion or throttle valve, in a vapour compression system is
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The process of adding moisture to the air, without change in its dry bulb temperature, is known as humidification.
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In case of liquids and gases, the heat transfer takes place according to
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The logarithmic mean temperature difference (tm) is given by (where Δt1 and Δt2 are temperature differences between the hot and cold fluids at entrance and exit)
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The radiation emitted by a black body is known as
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