The subcooling in a refrigeration cycle

More Questions from Heat Transfer, Refrigeration and Air Conditioning

• Fourier's law of heat conduction is (where Q = Amount of heat flow through the body in unit time, A = Surface area of heat flow, taken at right angles to the direction of heat flow, dT = Temperature difference on the two faces of the body, dx = Thickness of the body, through which the heat flows, taken along the direction of heat flow, and k = Thermal conductivity of the body)
• The process of heat transfer from a hot body to a cold body, in a straight line, without affecting the intervening medium, is called radiation.
• The by-pass factor for a cooling coil
• The formation of frost on cooling coils in a refrigerator
• The sensible heat factor during cooling and dehumidification process is given by (where h1 = Enthalpy of air entering the cooling coil, h2 = Enthalpy of air leaving the cooling coil, and hA = Enthalpy of air at the end of dehumidification process)
• The optimum effective temperature for human comfort is
• Defrosting of a refrigerator may be done by stopping the compressor for a short period.
• A water cooled condenser operates at a __________ condensing temperature than an air-cooled condenser.
• For ammonia refrigerating systems, the tubes of a shell and tube condenser are made of
• In a psychrometric process, the sensible heat added is 30 kJ/s and the latent heat added is 20 kJ/s. The sensible heat factor for the process will be

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