A text book of refrigerarion and air-conditioning by R S Khurmi. Refrigeration and airconditionin by rs khurmi. Onkar Nath. Engineering. Textbook of Refrigeration and Air-conditioning has ratings and 8 reviews. For the students of B.E.;UPSC(Engg. Services); UPSC (Civil Services); Secti. I found a Substitute for A Textbook of Refrigeration and Air Conditioning by R. S. Khurmi. This Substitute has all the Similar Topics Covered. Please get it from.
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Textbook of Refrigeration and Air-conditioning (M.E.)
Now consider a single stage, single khurrmi horizontal reciprocating compressor with clearance volume as shown by the p-v diagram in Fig, 9. In a vapour absorption system, heat is supplied to the generator at a temperature of 90 c ‘C. In addition to this, the passages leading to the suction and discharge valves always contribute to clearance volume. May 15, Muhammad Chaudhary rated it it was amazing. It may be noted that in a flow process, the mass enters the system and leaves after enhancing energy.
This process is shown by the curve 5′- 6 in Fig, 3. The values of dry bulb temperatures are also shown on the saturation curve. For per unit mass, C. The amount of work saved with incomplete intercooling is less than that in case of complete intercooling. Since the air is supplied to the refrigerator txetbook atmospheric pressure, therefore, volume of air handled by the compressor and expander is large.
As a typical example, although the metre is the unit of length, yet a small length of one-thousandth of a metre proves to be more convenient unit, especially in the dimensioning of drawings.
The pressure of air leaving the main compressor is 4. 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.
Draw a neat sketch of a practical vapour absorption refrigeration cycle. Now let us discuss about the units. But this does not reverse the cycle, on which it works, A two-stroke petrol engine may be made to revolve in reverse direction by altering the timing of ignition. From the figure, we find that work done during suction stroke.
It is used to compress the water vapours coming out of the flash chamber. In such a case. An aircraft refrigeration plant has to handle cnoditioning cabin load of 30 tonnes. However, it is used as the ultimate standard of comparison, A reversed Carnot cycle, using air as working medium or refrigerant is shown on p-e and T-s diagrams in Fig, 2.
A regenerative air refrigeration system for an aeroplane is designed to take a load of 30 TR. Determine the final dry hath temperature and relative humidity of air washed with recirculated spray water if the air is initial! To see what your friends thought of this book, please sign up. Ajay rated it it was amazing Aug 31, Simple vapour absorption system.
Draw the temperature-entropy and enthalpy-entropy diagram of a steam jet refrigeration system and write the expressions for the following efficiencies: Actual increase in temperature TV 0.
I want pdf of RAC. The air is further compressed in a compressor lo 3,5 bar and then cooled in a heat exchanger to 72X. The work done by the cooling turbine during this expansion process is given by The work of this turbine is used to drive the cooling air fan which draws cooling air from the heat exchanger. Such convenient units are formed by using a prefix in front of the basic units to indicate the multiplier.
It is further expanded in the expander to L bar and discharged to take the cooling load.
Full text of “A Textbook Of Refrigeration And Air Conditioning By R. S. Khurmi And J. K Gupta”
In other words, the refrigeration means a continued extraction of heat from a body whose temperature is already below the temperature of its surroundings. The air leaves the cabin at a temperature of 25T, Assuming the isentropic efficiencies of the compressor and turbine as 80 per cent and 75 percent respectively, find ; bh. The air is now expanded isothermally i. Mechaiiiiai equilibrium, A system is said to be in mechanical equilibrium, when there is no unbalanced forces acting on any part of the system or the system as a whole.
Find the od capacity of the plant Solution, Given: As a matter of fact, it is tedious to define the term entropy. They possess satisfactory thermodynamic properties but are highly flammable and explosive.
The unit of heat is also joule or kilojoule. Capacity Control for Reciprocating Compressors. Temperature of the sink: S, units has been revised to recognise all the S.
The unit runs at r. Similarly, if he lower temperature fixed by the Domestic Air Conditioner. It is further cooled in the cooling turbine by the process of expansion. A refrigerator used for cooling in summer can be used as a heal pump for healing in winter.