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Engineering and Tech / Fundamentals of Thermodynamcs 8 / Chapter 7 / Problem 19HP

Fundamentals of Thermodynamcs | 8th Edition | ISBN: 9781118131992 | Authors: Claus Borgnakke, Richard E. Sonntag

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In a heat pump that uses R-134a as the working fluid, the

Chapter 7, Problem 19HP

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Problem 19HP

In a heat pump that uses R-134a as the working fluid, the R-134a enters the compressor at 150 kPa, −10° C and the R-134a is compressed in an adiabatic process to 1 MPa using 4 kW of power input. Find the mass flowrate it can provide, assuming the process is reversible.

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QUESTION:

Problem 19HP

In a heat pump that uses R-134a as the working fluid, the R-134a enters the compressor at 150 kPa, −10° C and the R-134a is compressed in an adiabatic process to 1 MPa using 4 kW of power input. Find the mass flowrate it can provide, assuming the process is reversible.

ANSWER:

Solution to 19HP

Step 1 of 4

We need to find the mass flow rate provided by a heat pump with R-134a an refrigerant as the working fluid entering the compressor at at . The working fluid is compressed to an exit pressure of . The unit is run with a input power

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