Only do parts E and F, A, B, C, and D are already done with the work showing on the picture ofPTWe43tV4⁰ ㅋ=hour21.55'L-10-382350khahhi-ha481-2244₂-4₂ 735.85-427A refrigeration system is to be designed to maintain the temperature in the range of -15°C to -5°C,while the outside temperature varies from 15°C to 25°C. The total thermal load on the storage unit isgiven as 20 kW. Obtain an initial design for the vapor compression refrigeration system shown below.For safe operation and other factors, such as additional energy transfer, design the system using asafety factor of 1.3 such that Q. 26 kW. The compressor efficiency could range from 60 to 80 percent.This is to be completed individually. It would be highly unlikely for multiple students to select all thesame design parameters in part (a).sutomated3Expansionvalve or Dcapilary tubeQaState (: P=200kPa, X= 1; 2₁ = 2441,51221; 5₁ = 0.93774 125-14; T = -10.09°CStrke 2: S25=0.9377654²; P = 900 ppm, h₂ = 275.745 52; ha= hithre = 266.4 % 25, T₂ = 35.57°C 15₂ = 0.90625 45 51435 X2=0.9823State3: Xs=0; P₁ = P₂=900kraj ks = 101.6 147; S3 = 6.37381 754; T3 = 35.51°2Stute 4₁ P4 = P₁ = 20014 i hy=h₂ = 101.6157/12, 54-0.3942 494 ; Ty = -18.09° C; X4=0-3066(h)P₁ = 90021.4QnCondenserEvaporatorQ₂1₁=2014/0@Compressor70%Work1 sat VayerAs part of the design, you should:a) Specify and justify the constraints (isentropic efficiency, condenser, and evaporatortemperature) you chose.b) Show the cycle in relation to the two-phase region on a temperature-entropy (T-S) diagram.Using R-22 as the working fluid:c)Determine the temperatures and pressures at the different points in the cycle (points 1, 2, 3,and 4).d)Determine the coefficient of performance value and the mass flow rate of the working fluid.State 1 P₁ = 350 Kit ~10.38°c), X₁-) ; h₁ = 4 01415 ; 51 = 1.786 415 4Stale 2= 528 = 5₁ = 1.76145x1₂=950141²ch₂> 425-404, heth, the hip 4014 425-40-401076253/2 Stak) 1₂ = 12₂=4 50 4 1²₁ X ₂ = 0; 13 = 21.55°4₁2₁= 226 +25Stak 4: My = 1 = 350kla hy=h₂ = 2261 2=;14=1₁ = -10,38° 4-=435-8543²112=50.81°C12?B=5 ; Mr = bint en 40 25 1m =0,114,35hithy -2.25Using R-410a as the working fluid:e) Determine the temperatures and pressures at the different points in the cycle (points 1, 2, 3,and 4).f) Determine the coefficient of performance value and the mass flow rate of the working fluid.

Answered: Image /qna-images/answer/c2e354a2-ffda-458d-9d50-1762508de806.jpg

A refrigeration system is to be designed to maintain the temperature in the range of -15°C to -5°C, while the outside temperature varies from 15°C to 25°C. The total thermal load on the storage unit is given as 20 kW. Obtain an initial design for the vapor compression refrigeration system shown below. For safe operation and other factors, such as additional energy transfer, design the system using a safety factor of 1.3 such that Q. 26 kW. The compressor efficiency could range from 60 to 80 percent. This is to be completed individually. It would be highly unlikely for multiple students to select all the same design parameters in part (a). 7. = 90126

A refrigeration system is to be designed to maintain the temperature in the range of -15°C to -5°C, while the outside temperature varies from 15°C to 25°C. The total thermal load on the storage unit is given as 20 kW. Obtain an initial design for the vapor compression refrigeration system shown below. For safe operation and other factors, such as additional energy transfer, design the system using a safety factor of 1.3 such that Q. 26 kW. The compressor efficiency could range from 60 to 80 percent. This is to be completed individually. It would be highly unlikely for multiple students to select all the same design parameters in part (a). 7. = 90126

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter41: Troubleshooting

Section: Chapter Questions

Problem 7RQ: When the ambient outside air temperature isand the unit is a high-efficiency unit, the lowest...

See similar textbooks

Similar questions

Why is truck refrigeration designed to provide low- and medium-temperature refrigeration?
Define net refrigeration effect as it applies to the refrigeration cycle.
Why is two-stage compression popular for extra-low-temperature refrigeration systems?
If 14 gpm of water is flowing through an open-loop heat pump with a temperature difference of 7F, how much heat in Btu/h is being absorbed or rejected in the heat pump? Show all work and units.
How will oversizing the buffer tank on a water-to-water heat pump system affect the run time of the system?
When a standard-efficiency air-cooled condenser is used, the condensing refrigerant will normally be higher in temperature than the entering air temperature.
What is the heat output, in Btu/h, of a terminal unit with a T of 10F and a water flow rate of 5 gpm?
Define flash gas, and explain how it applies to the net refrigeration effect of the refrigeration cycle.
When the ambient outside air temperature isand the unit is a high-efficiency unit, the lowest condensing refrigerant temperature when the unit is operating properly is A. 110F. B. 115F. C. 120F. D. 125F.
Problem 6 The refrigeration system using R-22 refrigerant consists of 3 evaporators of capacities 30 ŤR, 20 TR and 10 TR with individual expansion temperature in the 3 evaporators is to be maintained at -10°C, 5ºC and 10°C respectively. The vapor leaving the evaporator is dry and saturated. The condenser temperature is 40°C and the liquid refrigerant leaving the condenser is sub cooled to 30°C. Assuming isentropic compression, find: a) Mass of refrigerant flowing through each evaporator, b) Power required to drive the system and c) COP of the system. as valves and compressors. The
Help ode Delay 1. An ice-making machine is required to remove 0.7 Btu/s of heat from water to produce ice (Qin). This ice machine is a refrigerator that operates steadily using R134a as the working fluid. The refrigerant enters the compressor as saturated vapor at 20 psia and leaves the condenser as saturated liquid at 80 psia. Draw a diagram showing the components of the refrigeration system inside the machine b. Show the cycle on a T-s diagram а. С. Calculate the work input required by the machine [0.176 hp or 0.124 Btu/s] d. What is the COP of this device? What does this represent? [5.6]
01. A refrigerant 22 system having a refrigerating capacity of 55 kW operates with an evaporating temperature of 5°C and rejects heat to water cooled condenser. The compressor is hermetically sealed. The condenser has a U value of 450 W/m².K and a heat-transfer area of 18 m? and receives a flow rate of cooling water of 3.2 kg/s at a temperature of 30°C. What is the condensing temperature?