A vapor-compression refrigeration system operates on the cycle shown below. The refrigerant is tetrafluoroethane. For the following set of operating conditions, determine the circulation rate of the refrigerant, the heat-transfer rate in the condenser, the power requirement, the coefficient of performance of the cycle, and the coefficient of performance of a Carnot refrigeration cycle operating between the same temperature levels. Use the table containing the properties of saturated 1,1,1,2-tetrafluoroethane (R134A) and the PH diagram for tetrafluoroethane (HFC-134a). Condenser Throttle valve Compressor Evaporator Vapor-compression refrigeration cycle. Evaporation T= 0°C Condensation T= 26°C n(compressor) = 0.79 Refrigeration rate = 600 kJ-s1 The circulation rate of the refrigerant is | |kg-s-1 The heat-transfer rate in the condenser is kJ-s-1 The power requirement is kW. The coefficient of performance of the cycle is[

A vapor-compression refrigeration system operates on the cycle shown below. The refrigerant is tetrafluoroethane. For the following set of operating conditions, determine the circulation rate of the refrigerant, the heat-transfer rate in the condenser, the power requirement, the coefficient of performance of the cycle, and the coefficient of performance of a Carnot refrigeration cycle operating between the same temperature levels. Use the table containing the properties of saturated 1,1,1,2-tetrafluoroethane (R134A) and the PH diagram for tetrafluoroethane (HFC-134a). Condenser Throttle valve Compressor Evaporator Vapor-compression refrigeration cycle. Evaporation T= 0°C Condensation T= 26°C n(compressor) = 0.79 Refrigeration rate = 600 kJ-s1 The circulation rate of the refrigerant is | |kg-s-1 The heat-transfer rate in the condenser is kJ-s-1 The power requirement is kW. The coefficient of performance of the cycle is[

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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Parts d,e and f
Water is the working fluid in a vapor power plant. Steam enters the turbine at 4 MPa, 540 °C, and exits the turbine as a two-phase, liquid vapor mixture at 27 °C. The condensate exits the condenser at 25 °C. The turbine efficiency is 90% and the pump efficiency is 80%. The power developed is 1 MW. ▾ ▼ Part A Determine the steam quality at the turbine exit. Express your answer to four significant figures. x = Submit Part B m = Determine the mass flow rate. Express your answer to two decimal places. Submit VAZ Ivec h A Part C Request Answer | ΑΣΦ | | vec S Request Answer Determine the thermal efficiency, Express your answer to four significant figures. 1971 ΑΣΦ | | | vec ← O C pw! 229 ? ? ? kg/s
Required information Refrigerant-134a enters the condenser of a steady-flow Carnot refrigerator as a saturated vapor at 65.0 psia, and it leaves with a quality of 0.05. The heat absorption from the refrigerated space takes place at a pressure of 30 psia. Determine the coefficient of performance. (Round the final answer to three decimal places.) The coefficient of performance is
A reheat cycle with two stages of reheating is executed with steam expanding initially from 200 bar (20 Mpaa) and 540 deg C. The 2 reheater pressures are 40 bar (4 Mpaa) and 10 bar (1 Mpaa) and the steam leaves each reheater at 540 deg C. Steam is bled in between two reheating sessions at a pressure equal to 20 and 15 bars into 2 open feedwater heaters. Condensation occurs at 60 deg C. All expansion and compression efficiencies are 90 %. There is a total of 10.3 kg/sec of steam (total mass flow rate m) circulated in the cycle. Answer the following: fill up the blanks in the items below: Actual Rankine cycle efficiency % using Qa’ and Qr’ values Answer: _____________ If the generator efficiency = 95%, brake engine efficiency = 90% what is the plant capacity in MW? Answer: ______________________ If Cp water = 4.187 KJ/kg-K; cooling water enters the condenser at 12 deg C and leaves at 21 deg C, find amount of cooling water needed by the condenser in kg/sec. (ACTUAL) Answer:…
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
The figure shows a two-stage, vapor-compression refrigeration system with two evaporators and a direct contact heat exchanger. Saturated vapor ammonia from evaporator 1 enters compressor 1 at 12 lbf/in² and exits the compressor at 46 lbf/in². Evaporator 2 operates at 46 lbf/in2, with saturated vapor exiting at state 8. The condenser pressure is 200 lbf/in2, and saturated liquid refrigerant exits the condenser. Each compressor stage has an isentropic efficiency of 80%. The refrigeration capacity of each evaporator is shown on the figure. Step 1 -5 Expansion A valve +6 -7 Evaporator Expansion valve Qout Condenser Compressor 2 Qin,2 = 10 tons 8 Evaporator Compressor Direct contact heat exchanger in,1 = 5 tons W₁₂
Please answer j, k, and l only
Refrigerant 22 is the working fluid in a Carnot refrigeration cycle operating at steady state. The refrigerant enters the condenser as saturated vapor at 36°C and exits as saturated liquid. The evaporator operates at -30°C. Determine, in kJ per kg of refrigerant flowing, the work input to the compressor. 46.58 21.06 40.34 32.10 B D
8.
In a vapor-compression refrigeration cycle, 9 kg/min of ammonia exits the evaporator as saturated vapor at-12°C. The refrigerant enters the condenser at 16 bar and 140C, and saturated liquid exits at 16 bar. There is no significant heat transfer between the compressor and its surroundings, and the refrigerant passes through the evaporator with a negligible change in pressure. Determine the refrigerating capacity, in kW. kW %3D Determine the power input to the compressor, in kW. kW %3D
Please only answer question 4 Parts C and D
Refrigerant 22 is the working fluid in a Carnot refrigeration cycle operating at steady state. The refrigerant enters the condenser as saturated vapor at 36°C and exits as saturated liquid. The evaporator operates at -30°C. Determine, in kJ per kg of refrigerant flowing, the net work in the cycle. A 20.37 B 36.47 18.37 24.37