FUNDAMENTALS OF THERMODYNAMICS
10th Edition
ISBN: 9781119634928
Author: Borgnakke
Publisher: WILEY
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Q1:
100 m² of air per minute at 30 C° DBT and 60% RH is cooled to 20 CDBT by passing
through a cooling coil at a pressure of 1 bar. Find:
1- Capacity of cooling coil in tons of refrigeration.
2- RH and WBT of air after cooling
Please state the assumptions and tables.
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- a cylinder and piston arrangement contains 2 kg of R-134a at 150 kPa, 60 C. The piston is now moved slowly, compressing the refrigerant until it exists as saturated vapor. During this process, the necessary heat transfer takes place (do you agree that heat transfer ocurs, and if so explain) such that the temperature of the refrigerant remains constant. (a) Show the process on P-v, T-v, and T-s diagrams. Explain your diagrams. (b) Determine the final pressure and specific volume of the R-134a (c) Calculate the work done and the heat transfer for the process.arrow_forwardHi, pls help me solve this problem. Thank you so much.arrow_forwardA tank of compressed air is at 40°C and 10 atm. 1 third of the gas is removed for inflating a car tire. The tank is allowed to exchange heat with the surroundings to maintain its temperature at all times. What kind of a process is this? What is the pressure remaining in the tank? a. Sketch the problem. b.Draw lines identifying the control volume, or control mass. c.Identify the states with numbers, letters, or descriptions such as “in” and “out”. d.Write down the knowns and unknowns. e.Identify what is being asked for. f.State all assumptions.arrow_forward
- I need it fastarrow_forward(Q4) Two rigid tanks are connected by a valve. Tank A contains 0.2 m' of water at 400 kPa and 3 H,0 H,0 80 percent quality. Tank B contains 0.5 m of water at 200 kPa and 250°C. The valve is now 400kPa 200 kPa opened, and the two tanks eventually come to the o. same state. Determine the pressure and the amount of heat transfer when the system reaches thermal equilibrium with the surroundings at 25°C. Barrow_forwardWith 3% moisture, 2.5 kg of steam has an enthalpy of 6,600 kJ. It is heated at constant pressure to a finalcondition of 80superheat. Find (a) the pressure of the process and (b) the quantity of heat received by the steam.arrow_forward
- QUICKLY AND CORRECTLY PLEASE Two vessels A and B of different sizes are connected by a pipe with a valve. Vessel A contains 140 L of air at 3000 kPa, 90oC. Vessel B, of unknown volume, contains air at 70 kPa, 5oC. The valve is opened and, when the properties have been determined, it is found that pm = 1400 kPa, tm = 45oC. (a) What is the mass in kg of air initially inside vessel A (b) What is the volume of vessel B in liters?arrow_forwardFor the situations below briefly explain how you obtained the values and provide the numerical answer. A) When 1 kg saturated water vapor is condensed to a saturated liquid water at 325 Kpa, what is the change in its volume? B) What is the specific internal energy liquid water at 280 degree Celsius and 7500 Kpa?arrow_forwardSaved Determine tne change in the internal energy of hellum, in kJ/kg, as it undergoes a change of state from 100 kPa and 20°C to 600 kPa and 300°C using the equation of state P(v- a) RT where as 05 m/kg and the ideal gas equation of state. Use data from the tables. The change N Nnternal energy of hellum for the equation of state is kJ/kg and for the Ideal gas equation of state is jkJikg.arrow_forward
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