Required information NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. A steady-flow Carnot refrigeration cycle uses refrigerant-134a as the working fluid. The refrigerant changes from saturated vapor to saturated liquid at 52°C in the condenser as it rejects heat. The evaporator pressure is 180 kPa. Determine the net work input. (You must provide an answer before moving to the next part.) The net work input is kJ/kg.

Required information NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. A steady-flow Carnot refrigeration cycle uses refrigerant-134a as the working fluid. The refrigerant changes from saturated vapor to saturated liquid at 52°C in the condenser as it rejects heat. The evaporator pressure is 180 kPa. Determine the net work input. (You must provide an answer before moving to the next part.) The net work input is kJ/kg.

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

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! Required information NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Refrigerant-134a enters the condenser of a residential heat pump at 800 kPa and 50°C at a rate of 0.024 kg/s and leaves at 750 kPa subcooled by 3°C. The refrigerant enters the compressor at 200 kPa superheated by 4°C. (Take the required values from saturated refrigerant-134a tables.) Он 750 kPa (3) Condenser Expansion valve Evaporator +M QL 800 kPa 50°C Compressor Determine the COP of the heat pump. (You must provide an answer before moving to the next part.) The COP of the heat pump is
Numerical answers shall be in four (4) decimal places. Box your final answers
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Numerical answers shall be in four (4) decimal places. Box your final answers
ervi n.k2603@sadiq.edu.iq SwMO Aslacel Asiacell jjs 0701 The name and photo associated with your Google account will be recorded when you upload files and submit this form. Your email is not part of 070E your response. Required Untitled Question * Q1: Refrigerant-134a is the working fluid in an ideal compression refrigeration cycle. The refrigerant leaves the evaporator -20°C and has a condenser pressure of 0.9 MPa. The mass flow rate is 3 kg/min. Find COP, COPR Carnot for same Tma and Tmin , and the tons of refrigeration. 1 Add file Untitled Question * Q2: A simple VCRC using R-134a operates with a condensing temperature of 30°c and an evaporating temperature of -20°c .The system produces 50 kw of refrigeration. Determine the : a) Thermodynamic property values at the four main state points of the cycle, b) COP, c) Rate of refrigerant flow. 1 Add file Submit Clear form This form was created inside of tmam Ja'afar Al-Sadia وأثق السلأمي 11:41p äc lull 22.04.02
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! Required information NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Consider a two-stage cascade refrigeration cycle with a flash chamber as shown in the figure with refrigerant-134a as the working fluid. The evaporator temperature is −10°C and the condenser pressure is 1600 kPa. The refrigerant leaves the condenser as a saturated liquid and is throttled to a flash chamber operating at 0.45 MPa. Part of the refrigerant evaporates during this flashing process, and this vapor is mixed with the refrigerant leaving the low-pressure compressor. The mixture is then compressed to the condenser pressure by the high-pressure compressor. The liquid in the flash chamber is throttled to the evaporator pressure and cools the refrigerated space as it vaporizes in the evaporator. The mass flow rate of the refrigerant through the low-pressure compressor is 0.11 kg/s. Assume that the refrigerant leaves the evaporator as a saturated vapor…
Please only answer question 4 Parts C and D
Required information NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. A commercial refrigerator with refrigerant-134a as the working fluid is used to keep the refrigerated space at -30°C by rejecting its waste heat to cooling water that enters the condenser at 18°C at a rate of 0.29 kg/s and leaves at 26°C. The refrigerant enters the condenser at 1.2 MPa and 65°C and leaves at 42°C. The inlet state of the compressor is 60 kPa and -34°C and the compressor is estimated to gain a net heat of 430 W from the surroundings. The heat exchanger loses no heat to the environment. 26°C 42°C ↓ Condenser 3 Expansion valve Water 18°C Evaporator QL (2) 1.2 MPa 65°C lin Win Compressor 60 kPa -34°C Determine the COP of the refrigerator. (You must provide an answer before moving on to the next part.) The COP of the refrigerator is
Required information NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Consider an ice-producing plant that operates on the ideal vapor compression refrigeration cycle and uses refrigerant-134a as the working fluid. The refrigeration cycle operating conditions require an evaporator pressure of 180 kPa and the condenser pressure of 1400 kPa. Cooling water flows through the water jacket surrounding the condenser and is supplied at the rate of 250 kg/s. The cooling water has a 10°C temperature rise as it flows through the water jacket. To produce ice, potable water is supplied to the chiller section of the refrigeration cycle. For each kg of ice produced, 333 kJ of energy must be removed from the potable water supply. (Take the required values from saturated refrigerant-134a tables.) Determine the mass flow rate of the potable water supply, in kg/s. The mass flow rate of the potable water supply iskg/s.