Thermodynamics: Please show me how to solve the given practice problems in step by step solution. 9. The COP (y) of a reversed Carnot cycle is 5.35 when refrigeration is done at 255 K;AS = 0.38 kJ/K during the isothermal heat interactions. Find (a) the refrigeration orcooling effect, (b) the temperature at which the heat is rejected, (c) the net work,

Answered: Image /qna-images/answer/ac9792af-1383-4a62-86d9-f75bec620e53.jpg

Answered: The COP (y) of a reversed Carnot cycle…

The COP (y) of a reversed Carnot cycle is 5.35 when refrigera AS D0.38 kJ/K during the isothermal heat interactions. Find ( cooling effect, (b) the temperature at which the heat is rejecte

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 steam power plant operates on a Rankine cycle. Steam enters the turbine at 600 F and 15 MaP and…

A: INTRODUCTION : The rankine cycle is used in gas turbines. Different processes are applied to…

Q: A Carnot Steam Cycle operates between pressure limits of 3 MPaa and 10 kPaa. Find the specific…

A: Given Data PH=3 MPa PL=10 kPa

Q: The co-efficient of performance of a refrigerator wor ing on a reversed Carnot cycle is 4. The ratio…

A: Given, Coefficient of performace of refrigerator = COP = 4 Let us take highest temperature of…

Q: 1. In a Carnot cycle operating on nitrogen, the heat supplied is 40 BTU and the adiabatic expansion…

A: Given data:

Q: 4. A reversed Carnot cycle is used for refrigeration and rejects 1000kW of heat at 67C while…

Q: In a steam power plant operating in a Rankine cycle, the steam entering the turbine is at 10,000 kPa…

Q: A heat engine is operated between temperature limits of 1370 C and 260 C. Engine supplied with 14142…

Q: The enthalpy entering the turbine of a geothermal power plant is 2750 KJ/kg and ,ass rate of 1…

A: Enthapy at turbine inlet, h1= 2750 kJ/kg Mass flow rate in turbine, m˙= 1 kg/sec Turbine brake…

Q: Refrigerant 134a enters a refrigerator compressor as superheated vapor at 0.20 MPa and -5 ° C at a…

A: Solution: T-s and P-h diagram of the process is shown in the figure below, Now we can find the…

Q: A Carnot cycle operates between the temperature of 300 and 2000 K, and produces 600 kW of net The…

Q: 2. A reverse Carnot cycle requires 3 hp and extracts energy from the lake to heat a house If the…

A: Given data: W˙=3 hp=2.2371 kWTH=70°F=294.261 KQH=2110 kJ/min=35.2 kJ/s Need to determine the…

Q: Consider a steam power plant, which operates under the model of simple Rankine cycle between the…

Q: A Camot heat pump with refrigerant-134a as the working fluid is used to keep a room at 78°F by…

Q: A reversed Carnot cycle delivers 60 x10' kJ\min to conditioned space when used as heat pump. If the…

Q: In an analysis, a heat engine based on the Carnot cycle operating between 1000 °C and 300 °C. The…

A: High temperature source, TH=1000oC=1000+273=1273 K Low temperature sink, TL=300oC=300+273=573 K Heat…

Q: 2. A Rankine cycle runs with a water boiler at 4 MPa and the cycle has the highest and the owest…

Q: 9A heat engine receives nalf of its heat supply at 1000 K and hasy 0500 K, while rejecting he to the…

Q: Show a derivation of final temperature of dual cycle in terms of initial temperature and ratios

Q: In a gas turbine plant operating on the constant-pressure cycle, the pressure ratio is 5 and the…

A: As per given question We have to determine theoretically output on kw

Q: The air conditioner (a kind of vapour-compression refrigerator) in a 1500-cc car, which works on a…

Q: diesel cycle with a compresonon at 15%, The maximum Cycle temperature s 1200 C. Utilbzing…

Q: A Carnot cycle operates between source and sink temperatures of 260°C and – 17.8°C. If the system…

A: Given data Source temp (Th) = 260oC = 260 + 273 = 533 K Sink Temp…

Q: 1. A Carnot Cycle uses air as a working substance and during the Isothermal expansion stroke, the…

A: The Carnot engine is a thermodynamic cycle that is only theoretical. According to Carnot, a heated…

Q: Consider the figure shown below. Compare a rectangular T-S Carnot Cycle and a square T-S Carnot…

A: As per carnot theorem For carnot cycles efficiency is function of only temperature limits. i.e.…

Q: ady state, a new power cycle is claimed by its inventor to develop nết power at a rate of (a, f 300…

A: Given Data : Net power (Wnet)= 3 hp Heat addition Qa=300Btumin

Q: The air conditioner (a kind of vapour-compression refrigerator) in a 1500-cc car, which works on a…

A: Given Data: Work done of Rankine cycle is: W=m˙Rh2-h1=1.5 kJ/s Pressure of air at point 1 is:…

Q: Find the least power of a perfect reversed heat engine that makes 400 kg of ice per hour at -8 c…

A: T1 = 18 C T2 = -8 C

Q: A Carnot cycle with 5.5 lbm of air as working substance; the pressure and temp at the beginning of…

A: Given data: The mass of the air is m = 5.5 lbm. The temperature of the air at the beginning of…

Q: An air standard Carnot Cycle, is executed in a close system between the temperature limits of 350K…

Q: 3. A REVERSED CARNOT CYCLE IS USED FOR REFRIGERATION AND REJECTS 200 000 Btu/min OF HEAT AT 152.6F…

A: GIVEN DATA- Q2=200000 Btu/min TH=152.6'F TL=450.6'R WE HAVE TO FIND COP , CAPACITY , WORK

Q: In a cooling system of a 12MW power plant has a cooling capacity of 3750 m3/hr. Water enters at 45°C…

A: Water inlet temperature, ti = 45°C Water exit temperature, te = 32°C Wet bulb temperature of air,…

Q: why carnot cycle is not a practical cycle in thermal power plant?

A: There are many limitations that limit the application of the Carnot cycle in the thermal power…

Q: A Carnot engine uses air as the working substance. There is 10 Btu/lbm of heat added, the pressure…

A: To find : The engine efficiency and the net work per unit mass. Given : The Sink temperature is :…

Q: In a Carnot cycle operatin adiabatic expansion ratio a. The thermal efficien b. The work c. The heat…

A: INTRODUCTION : The carnot cycle is the theoretical cycle, which gives maximum work output with…

Q: Find the maximum thermal efficiency possible for a power cycle operating between 1200 oF a

Q: The air conditioner (a kind of vapour-compression refrigerator) in a 1500-cc car, which works on a…

Q: A heat engine working on Carnot cycle receives heat at the rate of 40kW from a source at 1200 K and…

Q: An Otto cycle operates between the temperature limits of 300 and 2000 K and heat input 700kJ/Kg the…

Q: 9.15 A utility runs a Rankine cycle with a water boiler at 3.0 MPa, and the cycle has the highest…

Q: The temperature inside a kitchen freezer is a constant 256 K, while the temperature of the air in…

Q: The coefficient of performance of a reversed carnot cycle is 5.35 when refrigeration is done at 255…

A: Write the given data with suitable variables. COP=5.35TL=255 KS=0.38 kJ/K

Q: What is the COP of the Carnot refrigerator if the COP of the Carnot heat pump is 2.3 where two…

A: System is a definite area under our consideration. The state of the system is defined as property…

Q: 2. A Steam power plant uses a Rankine cycle to produce electrical power. The boiler pressure is 2…

Q: The quadlateral cycle concept offers appropriate limits in estimating the theoretical maximum for…

A: Given data: Air stream mass flow rate = 0.2 kg/s Maximum Temperature of air 300o C Temperature to…

Q: A 283-MW steam power plant operates on the Rankine cycle but with turbine and pump efficiencies of…

A: GivenP1=10000 kPa=10MpaT1=550oCP2=50kPaηP=ηT=90%Power=282 MW

Q: The air conditioner (a kind of vapour-compression refrigerator) in a 1600-cc car, which works on a…

Concept explainers

Entropy

In physics, entropy means the amount of disorder or the degree of randomness associated with a thermodynamic system. The system is not self-organized when the entropy of the system is high. For instance, when a system is at an elevated temperature, its molecules are in random motion, vibrating and colliding with each other. During this scenario, the probability of finding a molecule at a particular place twice, is low. Under this circumstance, the system can be said to be in a high entropy.

Question

Thermodynamics: Please show me how to solve the given practice problems in step by step solution.

9. The COP (y) of a reversed Carnot cycle is 5.35 when refrigeration is done at 255 K;
AS = 0.38 kJ/K during the isothermal heat interactions. Find (a) the refrigeration or
cooling effect, (b) the temperature at which the heat is rejected, (c) the net work,

Science that deals with the amount of energy transferred from one equilibrium state to another equilibrium state.

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

Data are provided for two reversible refrigeration cycles. One cycle operates between hot and cold reservoirs at 27°C and 3°C, respectively. The other cycle operates between the same hot reservoir at 27°C and a cold reservoir at -35°C. The refrigerator removes the same amount of energy by heat transfer from its cold reservoir. Determine the ratio of the net work input values of the two cycles, WCycle,2 Wcycle,1
A steam power-plant, with a power of "Wnet", is working according to the Rankine cycle. Steam enters the system in "P3"MPa pressure and 500 C degree temperature, and cooled down in condenser at 10 kPa pressure. Take Source temperature as "TH", and sink temperature 290 K. According to the information given. P3 = 6 MPa, %3D Wnet = 201 MW, TH = 1600 K Determine: 1.Heat generated (MW)(Not Heat given) 2.Pump entrophy generation (MW/K) 3.Combustion chamber entrophy generation (MW/K) 4.Turbine entrophy generation (MW/K)
The co-efficient of performance of a refrigerator wor ing on a reversed Carnot cycle is 4. The ratio of t highest absolute temperature to the lowest absolu temperature is
Q3. Consider a refrigerator operating on an ideal vapour-compression refrigeration cycle between pressures of 0.8435 and 8.8672 bar and using R134a as the working fluid. Pressure drops in the evaporator and condenser may be neglected. (a) . Sketch the cycle on the T-s diagram. ii. Sketch the cycle on the p-h diagram including labels for the components on the diagram, heat and work transfers, as well as the pressure values given above. i. Name three assumptions made about the compression process in an ideal vapour compression refrigeration cycle. (b) i Determine the specific enthalpy before and after the evaporator (kl/kg). i. Determine the refrigerant duty (Q.) if the mass flow rate of the refrigerant is 15.3 x 10 kg/s. i. Determine the specific enthalpy after the compressor (kl/kg). iv. Determine the compressor power and the coefficient of performance.
A thermodynamic cycle receives 150 J of heat from a cold reservoir and rejects 165 J of heat to a hot reservoir. What is its coefficient of performance as a refrigeration cycle, (B) ?
4. A reversed Carnot cycle is used for refrigeration and rejects 1000kW of heat at 670 while receiving heat at -23C. Determine (a) COP, (b) the power required and (c) the refrigerating effect.
True or false Heat is transferred to a system by either a cheap commercially available air-sourced heat pump with coefficient of performance of just 1.5, or an expensive 100% efficient electrical resistance heater. The loss of Carnot Work Potential (Exergy destruction, or T0Sloss term) is minimum when heat is added by the cheap commercial heat pump. Heat is transferred to a system by either a cheap commercially available air-sourced heat pump with coefficient of performance of just 1.5, or an expensive 100% efficient isothermal heat source. The loss of Carnot Work Potential (Exergy destruction, or T0Sloss term) is minimum when heat is added by the isothermal heat source.
A standard vapor compression system produces 70.4 kW of refrigeration using R-12as a refrigerant while operating between a condenser temperature of 42 °C and anevaporator temperature of –25 °C.2.1 Draw the p-h diagram of the cycle. 2.2 Determine:(a) the refrigerating effect in kJ/kg, (b) the circulating rate in kg/s, (c) the power supplied, (d) the COP, (e) the heat rejected in kW, and(f) the volume flow rate in m3/s.
Derive an expression for the COP of a completely reversible refrigerator in terms of the thermal energy reservoir temperatures, TL and TH.
mechanical cycle, A reversed Carnot cycle is given which operates between the temperature limits of 27°C and -3°C, So what will be the ratio of the COP of a refrigerator to that of a heat pump?
Problem 3: Consider an air-cooling system that can be modeled as an ideal vapor compression cycle where it can be assumed that the compressor operates reversibly and adiabatically. If the working fluid is R-134a, determine: (A)the temperature at state 2, T2 (B) the temperature at state 4, T4 (C) the required compressor work, wc (D) the coefficient of performance, COP1 P= 1400 kPa X3 = 0 3 2 m = 0.5 kg/s P; = 200 kPa X1 = 1
There are received 68,000 kg/h of steam by an ideal regenerative engine, havingonly one heater, of which the heater receives 15,400 kg/h; the condenser receivesthe remainder at 0.007MPa. If the heater pressure is 0.96MPa, find the state (qualityor °SH) of the steam (a) at the heater entrance and (b) at the consider entrance.