How to calculate compressed air temperature and pressure

In summary, the conversation discusses how to calculate the compressed air temperature and pressure at the combustion chamber inlet for a single stage centrifugal compressor with an RPM of 10,000. The professor at Virginia Tech has posted various tools for aerodynamics, including a Compressible Aerodynamics Calculator that may be helpful. It is important to know the pressure ratio and efficiency of the compressor, as well as including units when stating values.
  • #1
vincentryan
29
0
How to calculate compressed air temperature and pressure at combustion chamber inlet?

Small Example
I want to calculate compressed air temperature and pressure at combustion chamber inlet in single stage centrifugal compressor,
RPM = 10 000
Temperature and Pressure of the Air before compressed =30 and normal atmosphere pressure at ground level
 
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  • #2
A professor at Virginia Tech has written and posted several tools for aerodynamics applications:

http://engapplets.aoe.vt.edu/"

One of the tools is a Compressible Aerodynamics Calculator.

Perhaps there is something there that might help.
 
Last edited by a moderator:
  • #3
You need to know the pressure ratio and the efficiency of the compressor.

Note the 10 kRPM is not very high so your efficiency might not be that good.
Second, Make sure to put units behind your values so we know what you are talking about.

P01 = 101235 Pa ?
T01 = 303 K ?
 

FAQ: How to calculate compressed air temperature and pressure

Question 1: What is the ideal gas law and how does it relate to compressed air temperature and pressure?

The ideal gas law is a fundamental equation in thermodynamics that describes the relationship between the pressure, volume, and temperature of a gas. It states that the product of the pressure and volume of an ideal gas is directly proportional to the absolute temperature. This means that as the temperature of compressed air increases, so does its pressure.

Question 2: How do you calculate the temperature and pressure of compressed air?

To calculate the temperature and pressure of compressed air, you can use the ideal gas law equation: P1V1/T1 = P2V2/T2. P1 and V1 represent the initial pressure and volume of the compressed air, while T1 is the initial temperature. P2 and V2 represent the desired pressure and volume, and T2 is the final temperature. Rearranging the equation, you can solve for T2 and P2.

Question 3: What are the factors that affect the temperature and pressure of compressed air?

There are various factors that can affect the temperature and pressure of compressed air, such as the type of gas being compressed, the initial temperature and pressure, and the compression ratio. Other factors include the type and efficiency of the compressor, the ambient temperature, and the humidity of the surrounding environment.

Question 4: How does the temperature and pressure of compressed air impact its efficiency?

The temperature and pressure of compressed air have a significant impact on its efficiency. As the temperature of compressed air increases, its volume also increases, resulting in a decrease in pressure and energy. This can lead to lower efficiency and potential equipment failures. Similarly, if the pressure of compressed air is too high, it can cause damage to the equipment and decrease its efficiency.

Question 5: What are some common methods for controlling the temperature and pressure of compressed air?

There are several methods for controlling the temperature and pressure of compressed air. The most common method is through the use of a compressor with adjustable settings, which allows for precise control of the compression ratio and resulting temperature and pressure. Other methods include using cooling systems, such as refrigeration or aftercoolers, to reduce the temperature of compressed air, and regulators to adjust the pressure. Proper maintenance and regular monitoring of equipment also play a crucial role in controlling the temperature and pressure of compressed air.

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