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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Draw a neat diagram of lithium bromide water absorption system and explain its working, List the major field of applications of this system. Final velocity of the body. Draw the schematic and temperature -entropy diagram of the system, lake y — 1. Wc know that kinetic energy.
T 2 available for heat rejection is low, the C. The air is compressed isen tropically as shown by the curve on p-v and T-s diagrams. The T-s diagram for a boot-strap air cycle cooling system is shown in Fig. It puts off the compressor if the winding temperature exceeds the safe limit, thus protecting the winding against high temperature.
From the figure, we find that Work done during compression. The leakage of lluorocabon refrigerants may be detected by soap solution, a halide torch or an electronic leak detector.
Since the pull varies with the distance of the body from the centre of the earth, therefore weight of the body will also vary with its position on the earth’s surface say latitude and elevation.
In this system, mass Is taken in kg and weight in newtons. The main components of the steam jet refrigeration system, as shown in Fig. Decrease in internal energy, and heal rejected by the gas.
Goodreads helps you keep track textboik books you want to read. This leads to the formation of frost at the end of expansion process and clog the line. It is used to compress the water vapours coming out of the flash chamber. It also show’s the latent heat, mass of refrigerant circulated per tonne of textbook and the volume of the liquid refrigerant per tonne of refrigeration.
In the cooler, the compressed air is cooled to 15 C, pressure remaining the same, ft is then expanded w a pressure of l bar in art expat]sion cylinder ; from where it is passed to the cold chamber Find ; I. Constant pressure process or I so baric process We have already discussed that when a gas is heated donditioning a constant pressure, its temperature and volume will increase.
Textbook of Refrigeration and Air Conditioning : R. S. Khurmi :
The pressure refrigeratoin between the generator and the absorber and the gravity due to the height difference of the two shells is utilised to create the pressure for the spray. Textbook of Refrigeration and Air-conditioning M. The boot strap system, on the other hand, requires the air plane to be in flight so that the ram air can be used for cooling in the heat exchangers.
Now consider a single stage, single acting horizontal reciprocating compressor with clearance volume as shown by the p-v diagram in Fig, 9. We know that for isentropic compression processh. Stagnation temperature and pressure of air entering the main compressor ; 2. The cooled air conditioniny the heat exchanger is passed through the second cooling turbine from where the air is supplied to the cabin. Just a moment while we sign you in to your Goodreads account.
It also includes the process of reducing and maintaining the temperature of a body below the general temperature of its surroundings. The rammed air used for cooling is expanded in the first cooling turbine and leaves refgigeration at a pressure of khurm. The ambient air at pressure 0. Similarly, It is also not possible to make a refrigerating machine working on the reversed Carnot cycle. Thus the accumulator supplies dry and saturated vapour to the compressor.
Now let conditionihg discuss about the units. In other words, the entire volume of the refrigerant, in the compressor cylinder, is compressed by the inward stroke of the piston. However, single row condensers require more space than multi-row condensers.
In actual conritioning, there is a pressure drop in the heat exchanger which is not shown in the figure. P, of system, j Arts. This review has been hidden because it contains spoilers. This scale was first used by Celsius in The concept of this system is particularly useful in formulating the principles derived from the Second Law of Thermodynamics. Types of Vapour Compression Cycles.
S K We know that isentropic efficiency of the cooling turbine. Since the air is supplied to the refrigerator at atmospheric pressure, therefore, volume of air handled by the compressor and expander is large. Manufacture of Hydrocarbon refrigerants.
Textbook of Refrigeration and Air-conditioning (M.E.)
Moreover, it is not desirable to allow the piston head to come in contact with the cylinder head. The water starts vaporising at 10G Q C he. In a reversible process, there should not be any loss of heat due to friction, radiation or conduction, etc. We know that during isentropic expansion of air, no heat is absorbed or rejected hy the air, 4, Constant pressure expansion process.
E CD Entropy Fig, 3,9. Total mass of refrigerant flowing through the second evaporator i. The main causes for the irreversibility are: Moreover, friction converts the mechanical work into heat.
The refrigerating capacity required is 10 formes. Thus in a reversible cycle, the initial conditions are restored at the end of the cycle. Road, trnakulam, KochlPh: Describe with a diagram the reduced ambient air cooling system, 5.