Answered: true or false A refrigerator (COP =…

true or false A refrigerator (COP = 2.5) is used to maintain a lab temperature at 18° C for that 80 MJ of heat is absorbed. Then its work input would be 8.889 kJ/s.

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

Chapter45: Domestic Refrigerators And Freezers

Section: Chapter Questions

Problem 12RQ: Refrigerators currently being manufactured in the United States are using______as their refrigerant.

See similar textbooks

Related questions

Q: A piston-cylinder assembly contains 5 kg of air modeled as an ideal gas with a constant specific…

Q: The efficiency of an irreversible heat engine is always less than the efficiency of a reversible one…

A: construct the heat engine device working between the same reservoirs.

Q: 4.1) There is a real thermal engine that has an absorbed heat (Q1) of 5 kJ, the temperature of the…

A: Introduction: Heat engines are designed to generate usable work from the heat generated by the…

Q: Use image below PART C- Evaluate the useful work (i.e., the work corrected for the work against the…

Q: The following processes occur in a reversible thermodynamic cycle: 1-2: 0.2 kg heating at…

Q: As shown in the figure below, two reversible cycles arranged in series each produce the same net…

A: Given: The temperature of hot reservoir, TH = 1000°F The temperature of cold reservoir, TC = 450°F

Q: Define the THERMODYNAMICS AND ENERGY?

A: The word thermodynamics comes from the Greek word thermos which means heat and dynamic which means…

Q: How work can always be converted to heat directly and completely, but the reverse is not true.

A: Both work and heat are the two different forms of energy. Heat is the energy interaction because of…

Q: A water pump compresses water at m ̇=1 kg/s flow rate, P1= 5 MPa and T1= 20 oC to P2= 10 MPa and T2=…

Q: A heat engine working and rejects 40 % of absorbed heat from the source, while the sink temperature…

A: Qs is the heat absorbed by heat engine QR is the heat rejected by heat engine QR = 0.40*QS Temp. of…

Q: An engine operates between temperature limits of 900 K and T2 and another between T2 and 400 K. For…

Q: A refrigerator is operating at a steady state with COP 4.5 and power input 0.8kW. If energy is…

Q: Consider a Carnot refrigerator and a Carnot heat pump operating between the same two thermal energy…

A: Given, Coefficient of Performance (COP) of refrigerator = COPR = 3.4 COP of refrigerator (COPR)…

Q: Solving Problem: A Carnot engine operating between 700 K and 300 K produces 90 kJ of work. Determine…

A: Given data, Carnot engine, T1= 700K T2= 300 K W= 90 kJ Let heat rejected be the Q2

Q: A completely reversible heat engine operates with a source at 1500 R and a sink at 500 R. At what…

A: Write the formula for thermal efficiency of a reversible heat engine in terms of source and sink…

Q: A heat engine cycle consists of a closed cycle subdivided into four legs with the heat transfer for…

Q: To understand the mathematical expression for a thermodynamic cycle you must calculate the index of…

A: Consider below P-V diagram to understand different states. From the data given in question, P1 =…

Q: prove the following statements mathematically (i) the COP of an irreversible refrigerator is…

Q: 2. In an irreversible process, there is a (a) loss of heat (b) gain of heat (c) no loss of work (d)…

A: As per the guidelines of BARTLEBY we are subjected to solve only three sub parts of a question.…

Q: A carnot refrigerator operates between the temperatures of -40° C and 40°C The COP of the…

A: Given, Lower temperature in carnot cycle = TL = -40 oC = 233 K Higher temperature in carnot cycle =…

Q: In a piston subjected to a constant temperature T=125°C, there are 20 grams of water with a quality…

Q: A power cycle operating between two reservoirs receives energy Qh by heat transfer from a hot…

A: Given data: The heat transfer by hot reservoir is QH. The heat transfer by cold reservoir is QL.…

Q: Q/Which fig represents a real heat engine and why? Source T1 Qı=0 kJ НЕ W Q2 Sink T2 (A) Source T1…

A: From above figures observe that A) amount of heat supplied is zero. Then it is impossible to get…

Q: 1. Consider a Carnot refrigerator and a Carnot heat pump operating between the same two thermal…

A: To find: The COP of heat pump. Given: The COP of the refrigerator is 3.4. Formula used: The relation…

Q: A Carnot refrigerator absorbs heat from a space at 15°C at a rate of 16,000 kJ/h and rejects heat to…

A: Given Data: The heat absorption temperature is TL= 15∘C. The heat rejection temperature is TH=36∘C.…

Q: Maximum possible thermal efficiency of heat engine operating between temperature (A) T1 = 80 C and…

A: Heat engine is a thermodynamic equipment which is used to convert the thermal heat energy into…

Q: Two pounds of carbon dioxide (CO₂) as an ideal gas executes a Carnot power cycle while operating…

A: Given data: Mass of CO2 = 2 lb Cycle : Carnot Cycle Temperatures of Thermal reservoirs : 480°F and…

Q: According to Clausius statement, a)refrigerator and heat pumps are heat engines b)heat…

A: Clausius statement of second law: Heat always flows from higher temperature body to a lower…

Q: A heat engine operating between two reservoirs receives energy Q₁=2100 KJ by heat transfer from a…

A: Given: The value of Q1 is 2100 kJ/kg. The value of Q2 is 500 kJ/kg. The temperature T1 is 2000 K.…

Q: In a system, 90 kJ of heat is supplied from state 1 to state 2 by constant volume process. The…

A: Solution: The P-V diagram of the process is shown above. From process 1-2…

Q: 19. A Brayton cycle has a pressure ratio of 8 and initial temperature of 32°C. Its compressor work…

Q: Q3/ A heat pump cycle operating between two reservoirs receives energy Q2 from a cold reservoir at…

Q: An η-efficiency machine receives 9 kJ of heat per second at 102 ° C and loses 4 kJ of heat per…

A: Given, Heat received = Qh = 9 kJ Temperature at source = Th = 102 oC = 375 K Heat rejected = Ql = 4…

Q: A Carnot engine rejects 30% of absorbed heat to a sink at 30°C. The temperature of the heat source…

Q: Explain the TEMPERATURE AND THE ZEROTH LAW OF THERMODYNAMICS?

A: Temperature is defined as the measure of hotness or coldness. The average kinetic energy of the…

Q: (a) An irreversible heat engine A and a reversible heat engine B operate between the same two…

Q: Q2/ A power cycle operating between two reservoirs receives energy Qi by heat transfer from a hot…

Q: Referring to the reversible heat pump cycle shown in the figure, p1 = 14.7 Ib/in?, p4 = 20.3 lb/in?,…

Q: A refrigerator operates at steady-state with a COP of 4.5 and power input of 0.8kW. If energy is…

A: Answer: (a) The rate of energy rejection: 4.4 kW. (b) The lowest theoretical temperature inside the…

Q: First law of thermodynamics deals with * a) irreversible processes only b) reversible process only…

Q: The refrigerator shown in Fig. P5.35 operates at steady state with a coefficient of performance of…

Q: shown in the figure below operates at steady state with a coefficient of performance (COP) of 5.0…

Q: How to define reversible process and irreversible processes.

A: A thermodynamic process in which the system, as well as the surroundings, can quickly restore to the…

Q: Referring to the reversible heat pump cycle shown in the figure, p1 = 14.7 lbf/in², p4 = 2 27.8…

Q: Between a heat source at temperature T and a low-temperature heat well at 280 K power cycle is…

Q: Two Carnot heat engines run in series with the efficiency of first engine is k times the second. If…

Q: A nitrogen gas goes through a polytropic process with n = 1.3 in a piston/cylinder arrangement. It…

Q: Which cyclical process represented by the two closed loops, ABCFA and ABDEA, on the PVsize 12{ ital…

A: From the PV-diagram, it can be easily observed that the area enclosed by the curves ABDEA is more…

Q: 4. What is the second law of thermodynamics, give its Clausius and Kelvin-Planck statements and…

A: Before knowing second law of thermodynamics , we have to discuss the limitations left by first…

Question

true or false

A refrigerator (COP = 2.5) is used to maintain a lab temperature at 18° C for that 80 MJ of heat is absorbed. Then its work input would be 8.889 kJ/s.

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

Refrigerators currently being manufactured in the United States are using______as their refrigerant.
What is the highest COP that a refrigerator operating between temperature levels TL and TH can have?
Define the no refrigerator can have a higher COP than a reversible refrigerator operating between the same temperature limits.
A typical new household refrigerator consumes about 680 kWh of electricity per year and has a coefficient of performance of 1.4. The amount of heat removed by this refrigerator from the refrigerated space per year is (a) 952 MJ/yr (b) 1749 MJ/yr (c) 2448 MJ/yr (d) 3427 MJ/yr (e) 4048 MJ/yr
What is the coefficient of performance of a refrigerator that operates with Carnot efficiency between temperatures -3.00°C and +27.0°C?
For a refrigerator, if QH = 600.00 kJ, and QL = 350.00 kJ, then the coefficient of performance COPR is ____________
The objective of a refrigerator is to remove QL from the cooled space.
‏A refrigerator and heat pump operate between the same temperature limits . If COP of the refrigerator is 5 , the COP ofthe heat pump would be a. 3 b. 4 c. 5 d. 6
The figure below shows a Carnot engine driving a Carnot refrigerator. If the heat input is 100 Joules and the hot and cold reservoirs are at 500K and 100K respectively, answer the questions that follow. (A). What is qc1 (in Joules)? Express answer in THREE SIGNIFICANT FIGURES? (B). What is qc2 (in Joules)? Express answer in THREE SIGNIFICANT FIGURES? (C). What is qh2 (in Joules)? Express answer in THREE SIGNIFICANT FIGURES? (D). What is W (in Joules)? Express answer in THREE SIGNIFICANT FIGURES? (E). What is the efficiency of the Carnot engine driving this Carnot refrigerator?
A reversible cycle receives 40 kJ of heat from one heat source at a temperature of 127 ℃ and 37 kJ from another heat source at 97 ℃. The heat rejected (in kJ) to the heat sink at 47 ℃ is. A. 36 B. 49 C. 64 D. 81
An existing steady state refrigerator has been operating using the vapor-compression cycle for some months, with a COP of 3.1. Today the rate at which work is being added to the compressor is the same, but QC has decreased. Which of the following statements must be true? a. The new COP must be higher. b. QH must be larger in magnitude than normal. c. QH must be smaller in magnitude than normal. d. The compressor efficiency is lower than normal.
A high temperature source supplies a heat engine with 20 kJ of energy. If the engine rejects 4kJ to the low temperature sink, what is the actual efficiency of the engine?