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 two stage compressor receives 0.35 kg/s of air at 100 kPa and 269 K and delivers it at 5000 kPa. For minimum work and perfect intercooling find the amount of cooling water in the intercooler for 8oC water change of temperature.arrow_forwardIf the mass flow rate for air is 5 Kg/s .and air compressor takes in air at 200 kPa, 290 K and delivers it at 1.2 MPa, 600 K to a constant-pressure cooler, which it exits at 300 K. Take cp= 1.005 find 1- temperature exit for compressor is A- 290 K B- 600 K C - 300 K 2- work specific compressor is A- ( -211.55) B- ( -311.55) C- ( -411.55) 3- Specific heat transfer in the cooler is A- 301.5 B- 310.5 C- 320.5 4- Power the compressor is A- 1575.75 B- 1585.75 C- 1895.75arrow_forwardThe pressure and temperature entering the turbine is 1800kpaa and 380oC. The temperature leaving the turbine is 20kpa. The quality of steams entering the condenser is 90%. Find the turbine work in kJ/kg.arrow_forward
- A steam turbine has an inlet of 2 kg/s water at 1000 kPa, 350°C and velocity of 15 m/s. The exit is at 100 kPa, x = 1 and very low velocity. Find the specific work and the power produced.arrow_forward3. An adiabatic compressor takes argon from 100 kPa, 300 K to 2000 kPa. The compressor efficiency is 80%. (a) Find the outlet temperature (K) and the work (kJ/kg) (b) Find the entropy generation (kJ/kg-K)arrow_forwardThermodynamics sketch and label the turbine. Sketch and label the process on a T-s diagram also mentions all numbers on the process please. Thanks 7.56 A steam turbine has an inlet of 2 kg/s water at 1000 kPa, 400°C with velocity of 15 m/s. The exit is at 100 kPa, 150°C and very low velocity. Find the power produced and the rate of entropy generation.arrow_forward
- Please help me solve this as soon as possible, and I will surely leave you a like.arrow_forwardQ4 a- The pressure inlet for air compressor is 14 psi ,60 F and the output of 140 psi at 1080 R .This output passes through a cooler of constant pressure .if the exit air out of cooler is 540R find the specific work and specific heat of this compressor .use the table below in case.arrow_forwardThe turbine section in a jet engine receives gas (assume air) at 1200 K, 800 kPa with an ambient atmosphere at 80 kPa. The turbine is followed by a nozzle open to the atmosphere and all the turbine work drives a compressor receiving air at 85 kPa, 270 K with the same flow rate. Find the turbine exit pressure P₂ so the nozzle has an exit velocity of 800 m/s.arrow_forward
- A steam turbine has an inlet of 4 kg/s water at 1000 kPa, 400 oC and velocity of 77 m/s. The exit is at 100 kPa, 150 oC and very low velocity. Find the specific work and the power produced.arrow_forwardA turbine engine air intake is at pressure and temperature of air drawn 99 kPa and 29 0C respectively. The maximum pressure and temperature during the cycle is 990 kPa and 888 0C respectively. The adaibatic index as 1.4. After claculations, the pressure ratio of the cycle is , compressor exit temperature is K, turbine exit temperature is K, net specific work output from the gas turbine engine is in k, thermal efficiency is % and work ratio of the cycle is to I decimal placearrow_forward6. Superheated steam at 10MPA, 400°C is flow through an adiabatic nozzle of back pressure IMpa, and exit area of 10cm2. Find the Mass flow rate through the nozzle, the throat area that giveMaximum mass flow ratarrow_forward
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