Skip to main content

MULTISTAGE AIR COMPRESSION WITH INTERCOOLING

 In Multi - Stage Compressor, The Compression of the air from the initial pressure to the final pressure is carried out in more than one cylinder. It is used to get high pressure air. In a compressor, when compression ratio exceeds 5 , generally multistage compression is adopted.



In Two stage reciprocating air compressor. It consists of  a low-pressure Cylinder (LP), an intercooler and a high - pressure cylinder (HP). Fresh air is sucked from the atmosphere in low - pressure cylinder during its suction stroke at intake pressure p1 and Temperature T1. The air after compression in L.P cylinder is delivered to the intercooler at pressure p2 and Temperature T2. In the intercooler, the air is cooled at constant pressure by circulating cold water. The cooled air from intercooler is then taken to the high - pressure cylinder. In the high pressure cylinder, air is further compressed to the final delivery pressure (p3) and discharge to the receiver. 



Assumptions Made In Multistage Compression :

1. Suction and Delivery pressures remain constant during each stage.

2. The Index of compression is same in each stage.

3. The inter cooling in each stage is at constant temperature.

4. The mass of  air handled by the low pressure and high pressure cylinders are same. 

Advantages Of  Multistage Air Compressor 

Labels:

Comments

Post a Comment

Popular posts from this blog

Advantages And Disadvantages Of Air Refrigeration System :

 Advantages Of  Air Refrigeration : 1. The refrigerant used namely air is cheap and easily available. 2. There is no danger of fire or toxic effects due to leakages. 3. The weight to ton of refrigeration ratio is less as compared to other systems. Disadvantages Of Air Refrigeration : 1. The quantity of  Refrigerant used per ton of refrigeration is high as compared to other systems. 2. The COP of the system is very low. Therefore running cost is high. 3. The danger of frosting at the expander valves is more as the air contains moisture content. 
Post a Comment
Read more

MELTING FURNACES FOR FERROUS METALS : CUPOLA AND ITS WORKING

Various types of melting furnaces are used in different foundry shops, depending upon the quantity of metal to be melted at a time, and the nature of work that is carried out in the shop.  The primary objective in cupola is to produce iron of desired composition, temperature and properties at the required rate in the most economical manner. Besides, this furnace has many distinct advantages over the other types, e.g., simplicity of operation, continuity of production, and increased output coupled with a high degree of efficiency.  Description Of a Cupola : The Cupola Furnace consists of a vertical, cylindrical steel sheet, 6 to 12 mm thick, and lined inside with acid refractory bricks or acid tamping clay. The refractory bricks or the tamping clay used consist of  silicon oxide acid (SiO2) and alumina (Al2O3). The lining is generally thicker in the lower where the temperatures encountered are higher than in the upper region. The shell is mounted either on a brick work fo...
Post a Comment
Read more

SIMPLE CARBURETOR - CONSTRUCTION AND WORKING

CONSTRUCTION OF SIMPLE CARBURETOR :  The main Components of Simple Carburetor are : Float Chamber, float, nozzle, venturi, throttle valve, inlet valve, and metering jet . In the float chamber, a constant level of petrol is maintained by the float and a needle valve.  The float chamber is ventilated to atmosphere.  This is used to maintain atmospheric pressure inside the chamber. The float which is normally a metallic hollow cylinder rises and closes the inlet valve as the fuel level in the float chamber increases to certain level. The mixing chamber contains venturi, nozzle and throttle valve. The venturi tube is fitted with the inlet  manifold. This tube has a narrow opening called venturi. A nozzle is provided just below the centre of this venturi. The nozzle keeps the same level of petrol as that of the level in the float chamber. The mixing chamber has two butterfly valves.  One is to allow air into the mixing chamber known as choke valve. The other is to al...
Post a Comment
Read more