Question

Air at 101 kPa, 21oC, enters a compressor with negligible velocity and is discharged at 344 kPa, 330C through a pipe with a 0.09 m2 area, A2. The flow rate is 9 kg/s. The power input to the compressor is 447 kW. Determine the rate of heat transfer. Type your answer to 3 significant figures in units of kW. Do not type the units with the answer and quote your answer as a decimal value, i.e. 1234 not 1.234 x 10-3. Remember to include a minus sign if your answer is negative. The gas constant for air can be taken to be 0.287 kJ/kg-K. The specific heat capacity, cp, for air can be taken to be 1.005 kJ/kg-K

          Air at 101 kPa, 21oC, enters a compressor with negligible velocity and is discharged at 344 kPa,
330C through a pipe with a 0.09 m2 area, A2. The flow rate is 9 kg/s. The power input to the
compressor is 447 kW. Determine the rate of heat transfer.
Type your answer to 3 significant figures in units of kW. Do not type the units with the answer
and quote your answer as a decimal value, i.e. 1234 not 1.234 x 10-3. Remember to include a
minus sign if your answer is negative.
The gas constant for air can be taken to be 0.287 kJ/kg-K. The specific heat capacity, cp, for air
can be taken to be 1.005 kJ/kg-K

Show more…

Air at 101 kPa, 21oC, enters a compressor with negligible velocity and is discharged at 344 kPa,
330C through a pipe with a 0.09 m2 area, A2. The flow rate is 9 kg/s. The power input to the
compressor is 447 kW. Determine the rate of heat transfer.
Type your answer to 3 significant figures in units of kW. Do not type the units with the answer
and quote your answer as a decimal value, i.e. 1234 not 1.234 x 10-3. Remember to include a
minus sign if your answer is negative.
The gas constant for air can be taken to be 0.287 kJ/kg-K. The specific heat capacity, cp, for air
can be taken to be 1.005 kJ/kg-K

Added by Shannon M.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Sufiyan Alam

Step 1

First, we need to calculate the change in enthalpy (ΔH) of the air as it goes through the compressor. We can use the equation: ΔH = cp * ΔT where cp is the specific heat capacity of air and ΔT is the change in temperature. Given that cp = 1.005 kJ/kg-K and ΔT = Show more…

Show all steps

lock

Thanks for your feedback!

Air at 101 kPa, 21Â°C, enters a compressor with negligible velocity and is discharged at 344 kPa, 33Â°C through a pipe with a 0.09 m^2 area, A2. The flow rate is 9 kg/s. The power input to the compressor is 447 kW. Determine the rate of heat transfer. Type your answer to 3 significant figures in units of kW. Do not type the units with the answer and quote your answer as a decimal value, i.e. 1234 not 1.234 x 10^-3. Remember to include a minus sign if your answer is negative. The gas constant for air can be taken to be 0.287 kJ/kg-K. The specific heat capacity, cp, for air can be taken to be 1.005 kJ/kg-K.

Play audio

Feedback

Powered by NumerAI

Sufiyan Alam and 96 other subject Physics 101 Mechanics educators are ready to help you.

Ask a new question

Labs

Want to see this concept in action?

NEW

Explore this concept interactively to see how it behaves as you change inputs.

View Labs

Key Concepts

Recommended Videos

Recommended Textbooks

Ace is your personal tutor. It breaks down any question with clear steps so you can learn.

Start Using Ace

Continue solving this problem

Create a free account to:

View full step-by-step solution
Ask follow-up questions with Ace AI
Save progress and study later