An air conditioner is used to cool a house. When the outside air temperature is 306K and the inside is maintained at 295K, the air conditioner must provide 17 kW of cooling. a. What is the minimum electric power (kW) required to operate the air conditioner? b. What is the rate of heat transfer from the air conditioner? c. What is the COP for an ideal air conditioner operating between these temperatures?

An air conditioner is used to cool a house. When the outside air temperature is 306K and the inside is maintained at 295K, the air conditioner must provide 17 kW of cooling. a. What is the minimum electric power (kW) required to operate the air conditioner? b. What is the rate of heat transfer from the air conditioner? c. What is the COP for an ideal air conditioner operating between these temperatures?

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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Reference Book: Introduction to Chemical Engineering Thermodynamics by Smith, Van Ness, etc. 7th or 8th Ed.
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PART A ONLY ( USE IMAGE BELOW) In a standard ideal refrigeration cycle (Fig. 1), the refrigerant 134a enters adiabatically isolated expansion valve as a saturated liquid at a pressure P1 = 1 MPa and leaves the device at a pressure P2 = 100kPa. Then the refrigerant enters the evaporator, where it changes into the saturated vapor. Subsequently, the vapor is compressed in an isentropic compressor to the pressure 1MPa and condensed in the condenser back to the initial saturated-liquid state. PART A - Determine the heat qL absorbed by the refrigerant in the evaporator and the compressor work win (per 1 kg of the refrigerant).
a student, observed that she can focus more in her lessons if the air conditioning unit in her spacious room is opened. She usually set the temperature to be maintained in her room at 10 C. The temperature outside of her room is 40 C. The refrigerant of her AC unit is HFC-134 a. What is the coefficient of performance of her AC unit if it is operating on a Vapor Compression refrigeration cycle? The compressor efficiency is 0.7.
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
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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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
! 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
a student, observed that she can focus more in her lessons if the air conditioning unit in her spacious room is opened. She usually set the temperature to be maintained in her room at 10 C. The temperature outside of her room is 40 C. The refrigerant of her AC unit is HFC-134 a. What is the coefficient of performance of her AC unit if it is operating on a Carnot refrigeration cycle? The compressor efficiency is 0.7