FUNDAMENTALS OF THERMODYNAMICS
10th Edition
ISBN: 9781119634928
Author: Borgnakke
Publisher: WILEY
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I do not understand the chapter in general. May you please explain why you completed each step as you have.
Thank you.
A compressor receives R-410A as saturated vapor R-410A at 400 kPa and brings
it to 2000 kPa, 60°C. Then a cooler brings it to saturated liquid at 2000 kPa (see
Fig. below). Find the specific compressor work and the specific heat transfer in
the cooler?
A eccoi
= Compressor
Compressor section
Cooler section
4. An evaporator has R-410A at -20°C and quality 80% flowing in. The exit flow is saturated vapor at
-20°C.
a. Consider the heating to be a reversible process and find the specific heat transfer from the
entropy balance. (Answer: 48.7 kJ/kg)
b. If the heat source was at -10°C and the inlet and outlet streams still have the same properties as
in a), calculate the specific entropy generation? (Answer: 7.33 J/(kg K))
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- A factory generates compressed air from 100 kPa, 17°C by compression to 800 kPa, 500 K, after which it cools in a constant pressure cooler to 300 K, (see Fig. P4.36). Find the specific compressor work and the specific heat transfer in the cooler. 1 2 3 Compressor -w. Compressor section Cooler sectionarrow_forwardPlease help me solve this as soon as possible, and I will surely leave you a like.arrow_forwardIn an engine, the air in a piston-cylinder arrangement has a compression ratio of 0.1. It starts from 100kPa and 20degC. Find the temperature at state 2. You can assume an adiabatic process and the ideal gas law applies.arrow_forward
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