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We shall, sometimes, use the convenient units, which are multiples or divisions of our basic units in tens.

Textbook of Refrigeration and Air Conditioning : R. S. Khurmi :

This book is not yet featured on Listopia. Ph ; , bangalore schandg roup. The air bled from the main compressor is first cooled by the ram air in the first heat exchanger This cooled air, after compression in the secondary compressor, is led to the second heat exchanger where it is again cooled by the ram air before passing to the cooling turbine.

Since the compression of refrigerant requires some work to be done on it, therefore, a compressor must be driven by some prime mover. The pressure loss between the cooling turbine and cabin is 0.

Textbook of Refrigeration and Air-conditioning (M.E.)

Thus, a closed system does not permit any mass transfer across its boundary, but it permits transfer of energy heal and work. The frozen fish is cooled to e C The specific heats of fresh and refrigetation fish are 3. Units International System of Units7, Kilogram. They are written as 6Q and 6W, fig, 1.


Full text of “A Textbook Of Refrigeration And Air Conditioning By R. S. Khurmi And J. K Gupta”

Capacity Control of Centrifugal Compressors – In a boot strap air evaporative cooling system, the evaporator is provided a between the combustion chamber and the first conditiooning exchanger b between the first heat exchanger and the secondary compressor c between the secondary compressor and the second heat exchanger id between the second heat exchanger and the cooling turbine 8.

P is always greater than unity.

In tin aeroplane, a simple air refrigeration is used. List ai names of three evaporative coolants that can he used in aircraft refrigeration system at an altitude of 15 metres. Thanks for telling us about the problem. A reversible cycle should not be confused with a mechanically reversible engine. In other words, the entire volume of the refrigerant, in the compressor cylinder, is compressed by the inward stroke of the piston.

This will It may be noted that the adiabatic process may be reversible or irreversible. In aig to avoid this difficulty, an insulated vessel, known as accumulator or pre-cooler, is used in the system, as shown in Fig.

For any mass m kg of a gas. All the thermodynamic processes are classified into the following two groups: Both the air and water are cooled as the evaporation takes place.

For the sake of convenience, the unit of force adopted is such that it produces a unit acceleration to a body of unit mass, F – m a – Mass x Acceleration In S.


Also find the volume flow rate through compressor inlet and expander outlet for 1 X TR. Stroke length is mm ; and 5. When the operations or processes of cycle are plotted on p-v diagram, they form a dosed figure, each operation being represented by its own curve.

In engineering, we are mainly concerned with steady flow processes.

In the heat exchanger, the liquid refrigerant from the condenser gives heal to the liquid refrigerant from the expansion valve. The temperature of air recorded by a thermometer, when it is not effected by the moisture present in it, is called a wet bulb temperature 6 dry bulb temperature c dew point temperature d none of these 3.

For example, considers system consisting of a storage battery, as shown in Fig. The various processes are as follows: Some form of cooling arrangement usually water cooling is employed in the absorber to remove the heat of solution evolved there. Cy Cy The values of cc and y for some common gases are given below: Fig, 49, Theoretical vapour compression cycle with superheated vapour after compression. In other words, the total pressure exerted by air and water vapour mixture is equal to the barometric pressure.