FUNDAMENTALS OF THERMODYNAMICS
10th Edition
ISBN: 9781119634928
Author: Borgnakke
Publisher: WILEY
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A compressor has R-134a entering at 10°C, 100 kPa and exiting as a saturated vapor. It is given that this
particular compressor also involves heat loss (i.e., this compressor, in a non-typical fashion, has a non-
zero q; i.e., you cannot neglect q for this compressor). If the compressor operates in a reversible
isothermal manner, find the specific heat transfer and specific work.
Air at 1000 Co, 1.0 MPa expands in a polytropic process with n = 1.3 to a pressure of 250 kPa. Find
1- the final temperature
2- the specific work output
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- Helium at 100 kPa, 500 K is in a piston/cylinder setup and is compressed to a final pressure of 800 kPa. Consider helium as an ideal gas with constant specific heat capacities. Find the final temperature and the specific work if the above process is (i) reversible adiabatic (ii) reversible isothermalarrow_forwardOne way to determine the quality of saturated steam is to throttle the steam to a low enough pressure that it exists as a superheated vapor. Saturated steam at 500 kPa is throttled to 0.1 MPa, 100 oC. Determine the quality of the steam at 400 kPa side. (Starts the calculation from mass and energy conservation)arrow_forwardSteam undergoes an isentalpic (h=C) process from 1.5 mpa, 350°c to 10 mpa. Find the final temperature using the mollier charterarrow_forward
- 6.123E A piston/cylinder has R-410A at 60 psia and compresses it in a reversible adiabatic process to 400 psia, 200 F. Find the initial temperature. - Sketch and label the process on a T-s diagram and solve.arrow_forwardAir at 1200K, 800 kPa expands in a polytropic process with n = 1.33 to a pressure of 300 kPa. Find out the final temperature of the air and the specific work output?arrow_forwardA piston/cylinder receives (control mass system) R-134a at 300 kPa and compresses it in a process where the entropy does not change. to a state of 1000 kPa, 60° C. Find the initial temperature, AND THE CHANGE IN INTERNAL ENERGY.arrow_forward
- Q2: One mole of air at P: and temperature Ti is compressed at constant volume till its pressure doubled. Then it is allowed to expand reversibly and isothermally to the original pressure and finally restored to the originol temperature by cooling at constant pressure. Sketch the processes on a P-V and calculate the net work done by thearrow_forwardii. Inside the cylinder-piston is water with at-200C. During isothermal process, 550 kJ of heat is transferred to the water. Due to this, some water evaporated. The change of entropy of water during this process.arrow_forwardA pressure cooker 6 ltrarrow_forward
- Number 3arrow_forward1 kg of steam expands isentropically from 2.5 MPa & 300 Degrees Celsius to .95 MPa. Find the final quality and Wn, Ws.arrow_forwardA steam with a quality of 49%, enters an adiabatic nozzle at 3.5 MPa and leaves at 0.4 MPa and 140 oC with a flow of 7 m/s. Find the entrance velocity, in m/s.arrow_forward
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