Question Category: Mechanical Engineering

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When the lower temperature of a refrigerating machine is fixed, then the coefficient of performance can be improved by
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Environmental protection agencies advice against the use of chlorofluorocarbon refrigerants since
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In chemical dehumidification process,
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The operating temperature of a cold storage is 2°C. The heat leakage from the surrounding is 30 kW for the ambient temperature of 40°C. The actual C.O.P. of refrigeration plant used is one fourth that of ideal plant working between the same temperatures. The power required to drive the plant is
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The bypass factor, in case of sensible cooling of air, is given by (where td₁ = Dry bulb temperature of air entering the cooling coil, td₂ = Dry bulb temperature of air leaving the cooling coil, and td₃ = Dry bulb temperature of the cooling coil)
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The pressure at the outlet of a refrigerant compressor is called
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The comfort conditions in air conditioning are at (where DBT = Dry bulb temperature, and RH = Relative humidity)
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The unit of thermal diffusivity is
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The freezing point of R-12 is
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In a vapour compression system, the condition of refrigerant before entering the expansion or throttle valve is
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