An adiabatic compressor used in a refrigeration system compresses R-134a at P equal to 180 kPa...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
An adiabatic compressor used in a refrigeration system compresses R-134a at P₁ equal to 180 kPa and superheated by 2.73°C to a pressure P₂ equal to 600 kPa. Please answer the following questions. a. For an adiabatic and reversible compression, determine the final temperature of the compression, in °C. Represent the process on a T-s diagram including the relevant isobars. b. For the adiabatic and reversible compression determine the compression work. Would you consider your result to be equal to the minimum work per unit mass that a R-134a compressor will require to operate between P₁ and P₂? c. Now you wish to compare the adiabatic and reversible compressor against an actual compressor operating between the same pressures and inlet conditions for which the temperature at the exit of the compressor is equal to 50°C. Determine the enthalpy at the exit of the actual compressor and the work per unit mass needed for the compressor. d. Determine the isentropic efficiency of the actual compressor. An adiabatic compressor used in a refrigeration system compresses R-134a at P₁ equal to 180 kPa and superheated by 2.73°C to a pressure P₂ equal to 600 kPa. Please answer the following questions. a. For an adiabatic and reversible compression, determine the final temperature of the compression, in °C. Represent the process on a T-s diagram including the relevant isobars. b. For the adiabatic and reversible compression determine the compression work. Would you consider your result to be equal to the minimum work per unit mass that a R-134a compressor will require to operate between P₁ and P₂? c. Now you wish to compare the adiabatic and reversible compressor against an actual compressor operating between the same pressures and inlet conditions for which the temperature at the exit of the compressor is equal to 50°C. Determine the enthalpy at the exit of the actual compressor and the work per unit mass needed for the compressor. d. Determine the isentropic efficiency of the actual compressor.
Expert Answer:
Related Book For
Fundamentals of Thermodynamics
ISBN: 978-0471152323
6th edition
Authors: Richard E. Sonntag, Claus Borgnakke, Gordon J. Van Wylen
Posted Date:
Students also viewed these accounting questions
-
You and Sam have been in touch since the Palm Beach Business Development Luncheon, and he has expressed interest in your working on his business audit. The two of you make plans to meet for lunch,...
-
Managing Scope Changes Case Study Scope changes on a project can occur regardless of how well the project is planned or executed. Scope changes can be the result of something that was omitted during...
-
Prudence Corporation manufactures two products: X and Y. The company has 4,000 hours of machine time available and can sell no more than 800 units of product X. Other pertinent data follow. Which of...
-
Many consumers want to recycle, but varying rules across localities make it difficult for consumers to know if something is recyclable. Voluntary "How2Recycle" labels are starting to appear on...
-
dy (e) Find dx if y = x+2x. (f) Evaluate the limit Itx-24 (g) Find the dy/dx of y=A.sin(x)+ BCos(x). (h) Define the continuity of a function.
-
For the data in Exercise 7: a. Compute the expected frequencies for testing H0 : p1 = 0.4, p2 = 0.3, p3 = 0.1, p4 = 0.15, p5 = 0.05. b. Is it appropriate to perform a chi-square test for the...
-
Company P purchases an 80% interest in Company S on January 1, 2011, for $480,000. Company S had equity of $450,000 on that date. Any excess of cost over book value was attributed to equipment with a...
-
A stock has a real rate of return of 1 5 . 7 % and during the past year, inflation was 2 . 9 % . What was the stocks nominal rate of return ?
-
The following table contains data for a hypothetical economy: Consumer Expenditures $500 million Wages $650 million Investment Expenditures $200 million Interest Payments $100 million Government...
-
Buying behavior of students in saudi arabia?
-
1. John Murley operates John's Cleaning Service. As the bookkeeper, you have been requested to journalize the following transactions: 201X Aug. 1 6 12 Paid 2 months' rent in advance, $10,000....
-
Providence Hospital has the following balances on December 31, 2024, before any adjustment: Accounts Receivable = $62,000; = Allowance for Uncollectible Accounts $1,300 (credit). Providence estimates...
-
Mia Salto wishes to determine how long it will take to repay a $17,000 loan given that the lender requires her to make annual end-of-year installment payments of $3,209. a. If the interest rate on...
-
Arnell Industries has $80 million in permanent debt outstanding. The firm will pay interest only on this debt. Arnell's marginal tax rate is expected to be 25% for the foreseeable future. a. Suppose...
-
ABC123 Inc has decided to purchase 100% the voting shares of DEF456 for $400,000 in cash on July 1, 2019. On the date, the balance sheets of each of these companies were as follows: ABC123 Inc...
-
Pokemon phylogeny due 10/18 Using the organisms and characteristics in the attached document, build your own hypothetical phylogenetic tree. Think about which of the provided characteristics could be...
-
From a medical tourist perspective, compare Shouldice with the traditional hospital in terms of the key factors of competition. Using Table 15-3, why would Shouldice attract patients from outside the...
-
Consider a piston cylinder with 0.5 kg of R-134a as saturated vapor at -10C. It is now compressed to a pressure of 500 kPa in a polytropic process with n = 1.5. Find the final volume and temperature,...
-
A mixture of 60% helium and 40% nitrogen by mass enters a turbine at 1 MPa, 800 H at a rate of 2 kg/s. The adiabatic turbine has an exit pressure of 100 kPa and an isentropic efficiency of 85%. Find...
-
Find the second law efficiency of the heat exchanger in Problem 12.59. A flow of 2 kg/s mixture of 50% CO2 and 50% O2 by mass is heated in a constant pressure heat exchanger from 400 K to 1000 K by a...
-
The root mean square value of a signal \(x(t), x_{\mathrm{rms}}\), is defined as \[x_{\mathrm{rms}}=\left\{\lim _{T ightarrow \infty} \frac{1}{T} \int_{0}^{T} x^{2}(t) d t ight\}^{1 / 2}\] Using this...
-
What are the various methods available for vibration control?
-
Fill in the Blank. The presence of unbalanced mass in a rotating disc causes ____________ .
Study smarter with the SolutionInn App