Refrigerant-12 enters the condenser of a vapor-compression refrigera- tion system at 175 psia and 140°F and leaves as saturated liquid at 120°F. Mass flow rate of the refrigerant is 4.8 lbm/min. The heat is rejected to the surrounding air, which is at 90°F. Determine: (a) Heat rejection rate, Btu/hr.. (b) Separate the overall entropy changes per hour (Freon and sur- roundings)..: 23

Refrigerant-12 enters the condenser of a vapor-compression refrigera- tion system at 175 psia and 140°F and leaves as saturated liquid at 120°F. Mass flow rate of the refrigerant is 4.8 lbm/min. The heat is rejected to the surrounding air, which is at 90°F. Determine: (a) Heat rejection rate, Btu/hr.. (b) Separate the overall entropy changes per hour (Freon and sur- roundings)..: 23

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Related questions

Q: P₁ = 1.6 MPa T₁=350°C m = 16 kg/s Q=? Turbine W=9 MW 2+1₂=30°C sat. vapor

Q: Air at a 800 kPa and 1300 K enters an adiabatic and reversible turbine with a mass ﬂow rate 6 kg/s.…

A: Step 1: Given Data:Inlet Pressure (P1): 800 kPaInlet Temperature (T1): 1300 KMass Flow Rate: 6…

Q: 1. Air enters an adiabatic nozzle at 160kPa and 50°C with a speed of 20m/s and leaves at 95kPa with…

Q: 1. Air enters a compressor steadily at the ambient conditions of 100 kPa and 22°C and leaves at 800…

Q: 2. (Pp160p-ex4.18-jrfra) - Consider an ordinary shower where hot water at 60 °C is tempered with…

Q: Refrigerant-134a at 1 MPa and 90 degrees * C is to be cooled to 1 MPa and 30 degrees * C in a…

A: Given data as per question The pressure of Refrigerant at entry =1 Mpa The temperature of…

Q: Determine (a) the entropy change of the refrigerant, (b) the entropy change of the cooled space

Q: Steam at 200 kPa and 150°C is used to prepare hot water in a flow system. The steam cools and…

A: Steam at entry point,Saturated liquid condensate at exit,Water at entry,Water at exit,

Q: Air with mass flow rate of 1 kg/s enters the first stage of a compressor at 100 kPa and 300 K and…

Q: Please Help,will provide helpful e Ratings for correct solution. Thank You. Water flows through a…

Q: Entropy Generation and Carnot Performance: Consider the diagram below of a heat pump, engine 1, that…

Q: 500 kJ of heat is removed from a cooled space, in a reverse Carnot cycle refrigerator, by an…

A: Given data: dQ=500 kJT=-23°C=250 K Need to determine the change in entropy of the refrigerator.

Q: vii) Steam expands in an adiabatic turbine from 6 MPa and 400°C to 0.05 MPa at a rate of 4 kg/s. If…

Q: At a rate of 0.05 kg/s, refrigerant-134a enters the compressor of a refrigerator as superheated…

A: Given:- P1=0.14 MPaP2=0.8 MPaP3=0.72 MPaT1= -10°CT2= 50°CT3= 26°C Assumptions:- 1. Steady operating…

Q: Steam with quality 0.85 enters the condenser of a power plant at 20 kPa with a mass flow rate 10…

A: Given data:

Q: A two-stage compressor has water-jacketed cylinders and a water cooled inter cooler. The compressor…

Q: R-134a enters an adiabatic compressor as a saturated vapor at 120kpa at a rate of 0.5 m³/min and…

Q: The expansion in a turbine is adiabatic and irreversibility. The entropy of the steam at inlet is…

Q: An adiabatic capillary tube is used in some refrigeration systems to drop the pressure of the…

Question

42. Refrigerant-12 enters the condenser of a vapor-compression refrigera-
tion system at 175 psia and 140°F and leaves as saturated liquid at
120°F. Mass flow rate of the refrigerant is 4.8 lbm/min. The heat is
rejected to the surrounding air, which is at 90°F. Determine:
(a) Heat rejection rate, Btu/hr.
22
(b) Separate the overall entropy changes per hour (Freon and sur-
roundings).
23/

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step by step

Solved in 2 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.

Similar questions

A nozzle is placed horizontally and a working fluid is passing through steadily. At the nozzle’s inlet, the velocity of fluid is 30 m/s and specific enthalpy is 2500 kJ/kg. At the exit from nozzle, its specific enthalpy is 2000 kJ/kg. Calculate: The velocity of the fluid at exit
1. Steam flows steadily through an adiabatic turbine. The inlet conditions of the steam are 4 MPa, 500°C, and 80 m/s, and the exit conditions are 30 kPa, 92% quality, and 50 m/s. The mass flow rate of the steam is 12 kg/s. Develop the mass and energy balance for this situation. Then, determine (a) the change in kinetic energy, (b) the power output, and (c) the turbine inlet area. Provide all evidence (referred tables, equations used, etc.) to support your answers. P = 4 MPa T = 500°C V = 80 m/s Steam m = 12 kg/s W out P2 = 30 kPa X2 = 0.92 V2= 50 m/s
Steam is to be condensed in the condenser of a steam power plant at a temperature of 60°C with cooling water from a nearby lake, which enters the tubes of the condenser at 18°C at a rate of 75 kg/s and leaves at 27°C. Assuming the condenser to be perfectly insulated, determine the rate of entropy generation in the condenser.
Refrigerant-134a is to be cooled by water in a condenser. The refrigerant enters the condenser with a mass flow rate of 6 kg/min at 1 MPa and 70ºC and leaves at 35°C. The cooling water enters at 300 kPa and 15°C and leaves at 25ºC. Neglecting any pressure drops, determine (a) the mass flow rate of the cooling water required and (b) the heat transfer rate from the refrigerant to water
Air enters the evaporator section of a window air conditioner at 100 kPa and 27°C with a volume flow rate of 6 m3 /min. The refrigerant-134a at 120 kPa with a quality of 0.3 enters the evaporator at a rate of 2 kg/min and leaves as saturated vapor at the same pressure. Determine the exit temperature of the air and the rate of entropy generation for this process, assuming heat is transferred to the evaporator of the air conditioner from the surrounding medium at 32°C at a rate of 30 kJ/min.
Feedwater heaters are used to increase the efficiency of steam power plants. A particular heater is used to preheat 10 kg/s of boiler feed water from 20° C to 188° C at a pressure of 1200 kPa by mixing it with saturated steam bled from a turbine at 1200 kPa and 188° C. Although insulated, the heater loses heat at the rate of 50 j per gram of exiting mixture. What fraction of the exit stream is steam?
49