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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
A heat pump working on a reversed Carnot cycle has a C.O.P. of 5. It works as a refrigerator taking 1 kW of work input. The refrigerating effect will be

2 kW
4 kW
1 kW
3 kW

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Refrigeration and Air Conditioning
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)

(hA - h1)/ (h2 - h1)
(hA - h2)/ (h1 - h2)
(h2 - hA)/ (h1 - h2)
(h1 - h2)/ (hA - h2)

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Refrigeration and Air Conditioning
Which of the following cycles uses air as the refrigerant?

Stirling
Carnot
Bell Coleman
Ericson

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Refrigeration and Air Conditioning
The atmospheric air at dry bulb temperature of 15°C enters a heating coil maintained at 40°C. The air leaves the heating coil at 25°C. The bypass factor of the heating coil is

0.67
0.6
0.376
0.4

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Refrigeration and Air Conditioning
Bell Coleman cycle is a

Reversed Otto cycle
Reversed Rankine cycle
Reversed Carnot cycle
Reversed Joule cycle

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Refrigeration and Air Conditioning
Air conditioning means

Cooling
All of these
Heating
Dehumidifying

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