Compressor: Discussion and problem solving.
Starting from basic: A compressor is a device used to compress anything feasible. In our case those feasible things are gases or air.
A compressor is an important building block in any power generating cycle which basically consists of four building blocks
![[IMG]](proxy.php?image=http%3A%2F%2Fi51.tinypic.com%2F316omix.jpg&hash=a0a25a80f96ca37779a68c843926ec95)
So a compressor (I will restrict my discussion to reciprocating one) is generally comprised of stages. A single stage compressor does have some problem associated with it. A single cylinder will be subjected to very high pressure, this is associated with a danger of leakage past piston and the cooling is also rendered ineffective. The cylinder will have to be robust enough for sustaining such extreme conditions.
On the other hand, a multi stage compressor will have effective cooling in between the suction and delivery pressure and suction pressure. However it should be noticed that efficiency increase obtained by adding each stage decreases with each addition of stage. A compromise must hence be made between efficiency and cost incurred for adding each stage. To give you an example, for adding one stage, you require $100 which will promise you 5% efficiency rise, however the next stage though require $100, will only promise you 2.5% efficiency. So the investment should be worth it. A wise man will always be ready to make a compromise.
Another important component here is intercooler, nothing but a heat exchanger is provided, which cools the compressed air/ gas. It is generally provided between two stages.
A compressor is an important building block in any power generating cycle which basically consists of four building blocks
- Evaporator
- Compressor
- Condenser
- Turbine
So a compressor (I will restrict my discussion to reciprocating one) is generally comprised of stages. A single stage compressor does have some problem associated with it. A single cylinder will be subjected to very high pressure, this is associated with a danger of leakage past piston and the cooling is also rendered ineffective. The cylinder will have to be robust enough for sustaining such extreme conditions.On the other hand, a multi stage compressor will have effective cooling in between the suction and delivery pressure and suction pressure. However it should be noticed that efficiency increase obtained by adding each stage decreases with each addition of stage. A compromise must hence be made between efficiency and cost incurred for adding each stage. To give you an example, for adding one stage, you require $100 which will promise you 5% efficiency rise, however the next stage though require $100, will only promise you 2.5% efficiency. So the investment should be worth it. A wise man will always be ready to make a compromise.
Another important component here is intercooler, nothing but a heat exchanger is provided, which cools the compressed air/ gas. It is generally provided between two stages.
Replies
-
haniyahHello,
Can you tell me the process of designing finned tube condenser???
I want to design a condenser for R-22 and R-134a -
ISHAN TOPREYes, I think you should start a new thread. Post complete information so that we can help you.
-
haniyahlet say i have 2 TR compressor and this compressor is compressing R-22. The ambient temperature in peak summer reaches upto 52 degree centigrade here in Sharjah. After condensing from the condenser the gas will go through the expansion valve and then into the shell and tube evaporator where it expands and boils by taking the heat of water entering into the evaporator at 30 degree centigrade and leaving at 27.8 degree centigrade and the flow of water is 0.8 kg/s.
Now i want to design a finned tube condenser.
You are reading an archived discussion.
Related Posts
Google Hotel Finder is in early stages and only available in the United States. It lets people search hotels in various cities, save those that interest them and book reservations....
What is the placement process for Accenture?
Could someone share the questions asked in the Accenture aptitude test?
What is the placement process for Patni Computer Systems?
Could someone share the questions asked in their technical & aptitude tests?
Wipro Technologies visits different campuses across the country for recruitment drives. What is their placement drive process?
Could someone share the previous test papers?
It is sometime that I have been thinking about this topic. I have seen diesel engines which are prone to cavitation. Now I want to calculate *the amount* of cavitation...