When the lower temperature of a refrigerating machine is fixed, then the coefficient of performance can be improved by
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Mechanical Engineering · all questionsRefrigeration And Air Conditioning
Refrigeration And Air Conditioning
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The evaporator changes the low pressure liquid refrigerant from the expansion valve into
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The coefficient of performance is the ratio of the refrigerant effect to the
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In refrigerator, liquid receiver is required between condenser and flow controlling device, if quantity of refrigerant for system is
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Pressure of water vapour is given by
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In vapour compression cycle using NH3 as refrigerant, initial charge is filled at
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If a heat pump cycle operates between the condenser temperature of +27°C and evaporator temperature of -23°C, then the Carnot COP will be
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Vertical lines on pressure-enthalpy chart show constant
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A vapour absorption refrigerator uses _________ as a refrigerant.
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Which of the following statement is correct for ammonia as a refrigerant?
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In vapour compression refrigeration system, refrigerant occurs as liquid between
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The total pressure exerted by the mixture of air and water vapour is equal to the sum of pressures which each constituent would exert, if it occupied the same space by itself. This statement is called
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Which of the following statement is wrong?
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Which of the following statement is wrong?
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In S.J. unit, one ton of refrigeration is equal to
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While designing the refrigeration system of an aircraft, the prime consideration is that the
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In aqua ammonia absorption refrigeration system, incomplete rectification leads to accumulation of water in
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Air refrigeration operates on
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The C.O.P. of an absorption type refrigerator is given by (where T1 = Temperature at which the working substance receives heat, T2 = Temperature of cooling water and T3 = Evaporator temperature)
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Critical temperature is the temperature above which
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