Question

In: Physics

Five kilograms of ammonia (NH3) undergo a refrigeration cycle detailed as: • Process 1-2: isothermic expansion...

Five kilograms of ammonia (NH3) undergo a refrigeration cycle
detailed as:
• Process 1-2: isothermic expansion from saturated vapor at 10ºC, to P = 3 bar with
Q = 400 kJ.
• Process 2-3: isochoric cooling to 0 ◦C.
• Process 3-4: isobaric compression.
• Process 4-1: isochoric heating.

Calculate:

a) the P −v and T −v diagrams.

b) the states table detailing P, v, T and u.
c) the process table for Q, W and ∆U.
d) the performance coefficient, β, of the cycle.

Solutions

Expert Solution

Solution of the problem given below


Related Solutions

The isentropic efficiency of an ammonia, NH3, refrigeration plant is 0.88. The ammonia enters the compressor...
The isentropic efficiency of an ammonia, NH3, refrigeration plant is 0.88. The ammonia enters the compressor as dry saturated vapour at -16 ? and leaves the compressor in a superheated state at 11.67 bar. The refrigerant is then condensed and undercooled by 4K at constant pressure before being expanded at -16 ?. (NEED TO USE STEAM TABLES FOR NH3, PLEASE ONLY ANSWER IF YOU HAVE A GOOD UNDERSTANDING OF REFRIGERTION) a)Draw a schematic of the plant and the cycle on...
Graph 2 Substance Ammonia This is an hypothetic Refrigeration cycle. Draw the schematic for this case....
Graph 2 Substance Ammonia This is an hypothetic Refrigeration cycle. Draw the schematic for this case. (evaporator, compressors ...) Sketch the T-s and P-v diagram. 30 points. Process State 1 leaving the evaporator at -20 C and 175 kPa State 2 leaving the Low pressure isentropic compressor at 5.5 bar and enter the high pressure irreversible compressor to state 3 State 3 135 C, 20 bar State 4 isobaric condenses process (3-4) to saturated liquid State 5 (4-5) expansion valve...
A closed piston-cylinder system undergoes a cycle: ​Process 1 to 2 is an expansion process where...
A closed piston-cylinder system undergoes a cycle: ​Process 1 to 2 is an expansion process where heat is added. The temperature remains constant. Process 2 to 3 is a constant volume heat addition process. ​Process 3 to 4 is a compression process where heat is lost. The pressure remains constant. ​Process 4 to 1 is polytropic expansion, Pvn​=constant with n=1.4 and it is adiabatic (Q=0). ​Assume air, ideal gas, with constant specific heats, k=1.4. R=.287kJ/kgK ​State 1: T=300K, P=150kPa ​State...
An expansion valve in a refrigeration cycle throttles R134a from 1.2MPa saturated liquid to 0.32MPa. What...
An expansion valve in a refrigeration cycle throttles R134a from 1.2MPa saturated liquid to 0.32MPa. What is the specific volume at the exit of the expansion valve in unit of m3/kg. Round the result to 4 decimal places.
Two moles of a monatomic ideal gas undergo the following cycle: Process ab is an isochloric...
Two moles of a monatomic ideal gas undergo the following cycle: Process ab is an isochloric process ending with pressure at b 3.0x10^5 Pa Process bc is isothermal Process ca is isobaric with pressure 1.0x10^5 Pa. The maximum temperature attained by the gas is 375 degrees celcius. a. How much heat enters the gas and how much heat leaves the gas at each cycle. b. How much work done is done per cycle. c. What is the efficiencyfor this cycle?...
Summarize the process of photosynthesis, including the Calvin cycle, being sure to explain which compounds undergo...
Summarize the process of photosynthesis, including the Calvin cycle, being sure to explain which compounds undergo reduction and which undergo oxidation.
2 kilograms of ideal gas air undergoes an isothermal expansion from 3MPa and 300K to 1Mpa....
2 kilograms of ideal gas air undergoes an isothermal expansion from 3MPa and 300K to 1Mpa. Determine the work done, the change in specific internal energy, and the heat transferred.
Five kg of butane (C4H10) in a piston–cylinder assembly undergo a process from p1 = 5...
Five kg of butane (C4H10) in a piston–cylinder assembly undergo a process from p1 = 5 MPa, T1 = 500 K to p2 = 2 MPa, T2 = 450 K during which the relationship between pressure and specific volume is pvn = constant. Determine the work, in kJ.
Methanol, CH3OH, is a nonelectrolyte; ammonia, NH3, is a weak electrolyte; and calcium hydroxide, Ca(OH)2, is...
Methanol, CH3OH, is a nonelectrolyte; ammonia, NH3, is a weak electrolyte; and calcium hydroxide, Ca(OH)2, is a strong electrolyte. What are the solute particles present in aqueous solutions of each compound? (Select all that apply.) methanol ammonia calcium hydroxide CH3, OH2+, H+, O2-, CH3O- ,OH- ,CH3OH NH2+ , O2- , H+ , OH, NH3, NH4+ H+ ,Ca2+ , CaOH+ , Ca(OH)2, Ca(OH)3-,OH- If 0.1 mol of each compound is dissolved in solution, which one contains about 0.3 mol of solute...
A Carnot cycle consists of a cycle of 4 processes, in the order: 1) isothermal expansion...
A Carnot cycle consists of a cycle of 4 processes, in the order: 1) isothermal expansion at T(hot)=90oC, 2) adiabatic expansion to T(cold)=30oC, 3) isothermal contraction at T(cold), 4) adiabatic contraction to the original state. The gas in the system can be treated as a monotonic ideal gas Part A. After one complete cycle, what is the change in thermal energy of the gas in the system? Part B. After a complete cycle what is the change in entropy? (The...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT