When the lower temperature is fixed, the COP of a refrigerating machine can be improved by

Related MCQs

• When the higher temperature is fixed, the COP of a refrigerating machine can be improved by
• A reversed Carnot cycle has a COP of 4. The ratio of higher temperature to lower temperature will be
• A reversed Carnot cycle has a COP of 4. The ratio of higher temperature to lower temperature will be
• A refrigerating system operates on the reversed Carnot cycle. The higher temperature of the refrigerant in the system is 40?C and the lower is - 15?C. The capacity is to be 10 tons. Neglecting all losses, the coefficient of performance of the system would be
• A refrigerating machine working on Reversed Carnot cycle takes out 2 kW per minute of heat from the system while working between temperature limits of 300?K and 200?K. The C.O.P. and power consumed by the cycle will be
• The ratio of high temperature to low temperature for reversed Carnot refrigerator is 1.25. The COP will be
• The COP of a reversed Carnot cycle is 5. The ratio of highest absolute temperature to the lowest absolute temperature
• 2 HP per ton of refrigeration is required to maintain the temperature of - 40?C in the refrigerator if the refrigeration cycle works on Carnot cycle. The COP of the cycle would be
• Carnot refrigerator absorbs heat at -13° C and requires 1 kW for each 6.5 kW of heat absorbed, the COP and temperature of heat rejections respectively
• When Freon 12 is used as a refrigerant in vapour compression cycle, the mass circulated per ton of refrigerating effect will be nearly