Question: Repeat Problem 9.117 using EES. Modify your EES program to find the coefficient of performance between pressures of 0.28 and 1.5 MPa. Plot Ts diagrams

Repeat Problem 9.117 using EES. Modify your EES program to find the coefficient of performance between pressures of 0.28 and 1.5 MPa. Plot T–s diagrams for the original cycle conditions and for the new conditions. Use the two T–s diagrams to explain the change in the coefficient of performance.

Problem 9.117

Consider an ideal vapor-compression cycle using R-134a and operating between pressures of 0.28 and 1.75 MPa. Determine the coefficient of performance for the cycle for application

(a) In a refrigerator

(b) In a heat pump. Temperature (K) 500 400 300 200 0.5 3 0.75 1.0 h =

Temperature (K) 500 400 300 200 0.5 3 0.75 1.0 h = constant 1.75 MPa 4 0.28 MPa 1.25 1.5 Entropy (kJ/kg. K) 2 1 1.75 2.0

Step by Step Solution

★★★★★

3.35 Rating (155 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

To solve Problem 9117 using Engineering Equation Solver EES well first set up the cycle and calculate the coefficient of performance COP for both refr... View full answer

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Students Have Also Explored These Related Thermodynamics Concepts And Applications Questions!

The vortex tube (also known as a Ranque or Hirsch tube) is a device that produces a refrigeration effect by expanding pressurized gas such as air in a tube (instead of a turbine as in the reversed...

The new refrigerant fluid R-123 (see Table A.2) is used in a refrigeration system that operates in the ideal refrigeration cycle, except the compressor is neither reversible nor adiabatic. Saturated...

A refrigerator uses R-134a as the working fluid and operates on an ideal vapor compression refrigeration cycle between 0.15 MPa and 1 MPa. A temperature difference of 5C is maintained for effective...

Repeat Problem 9.131 using EES. Find the coefficient of performance and generate Ts diagrams for the original cycle conditions and your two modified cycles having an improved coefficient of...

Repeat Problem 9117 using a compressor efficiency of 80 percent and a turbine efficiency of 85 percent.

need question 1-9 and question 13 done Chapter 9 Advanced Query Formulation with SQL 367 2017 2. Using a Type Il nested query, list the customer number, name (first and last), and city of each...

Repeat Prob. 568 using EES (or other) software. Data from problem 68 Consider steady two-dimensional heat transfer in a long solid body whose cross section is given in the figure. The temperatures at...

Part (a): Expected Answer for 5.15: Additional Information: (Question 5.3 Answer): (Question 5.2 Answer): Part (b): Expected Answer for 5.16: Part (c): Expected Answer for 5.19: Please explain and...

Repeat Prob. 565 using EES (or other) software. Data from problem 65 Consider steady two-dimensional heat transfer in a long solid body whose cross section is given in Fig. P565. The temperatures at...

Paula purchases a 40% interest in Dancer Enterprises for $52,000 on January 2 of the current year. Dancer is organized as a partnership and has an income of $50,000 in the current year. Dancer also...

Dudley Hill Golf Club's market-to-book ratio is currently 2.7 times and the PE ratio is 6.85 times. Dudley Hill Golf Club's common stock is currently selling at $24.84 per share. A: What is the book...

4 When something has completely decomposed, what passes into the soil to be used by plants?

10.25 Females or males more nicotine dependent? Refer to Exercise 10.23 about studying nicotine dependence using a random sample of teenagers. Of those seventh graders in the study who had tried...

The steam requirements of a manufacturing facility are being met by a boiler whose rated heat input is 5.5 10 6 Btu/h. The combustion efficiency of the boiler is measured to be 0.7 by a handheld...

An adiabatic closed system is accelerated from 0 m/s to 30 m/s. Determine the specific energy change of this system, in kJ/kg.

In an informative article in a magazine it is stated that tires lose roughly 1 psi of pressure for every 10F drop in outside temperature. Investigate whether this is a valid statement.

Given the Income Statements and Balance Sheets for both Honda and Toyota, provide the following... 1.Current Ratio 2.Quick Ratio 3.Cash Ratio 4.Total Debt Ratio 5.Debt-Equity Ratio 6.Times Interest...

32. The fixed assets have estimated useful lives as follows: Building - 31.5 years Computer Equipment - 5.0 years Office Equipment - 7.0 years Use the straight-line method of depreciation. Management...

[ The following information applies to the questions displayed below. ] Rose Company had no short - term investments prior to this year. It had the following transactions this year involving...