Air within a piston-cylinder assembly executes a Carnot heat pump cycle, as shown in the figure below. For the cycle, TH = 500 K andTc = 300 K. The energy rejected by heat transfer at 500 K has a magnitude of 1000 kJ per kg of air. The pressure at the start of theisothermal expansion is 325 kPa.Tc.p-v diagram for a Carnot gasrefrigeration or heat pump cycle.Assuming the ideal gas model for the air, determine:(a) the magnitude of the net work input, in kJ per kg of air, and(b) the pressure at the end of the isothermal expansion, in kPa.

Answered: Image /qna-images/answer/4cc8afb4-b093-4a30-b432-7b55b160d11e.jpg

Answered: Air within a piston-cylinder assembly…

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

See similar textbooks

Similar questions

I need help with the diagnrams for this thermo practice problem 2 kg of air in a piston cylinder initially at P1=101 kPa, T1= 300 K undergoes a cycle made up of three processes: 1-2 Isothermal compression until the volume is (1/15) of its original value.2-3 Constant Pressure heating3-1 Isentropic Expansion back to the initial state Assume air is an ideal gas with constant specific heats with the following values: Cpo=1.027kJ/kgK; Cvo= 0.740 kJ/kgK; R=0.287 kJ/kgK; ɣ=1.388 Sketch this cycle on a P-v diagram and on a T-s diagram, clearly indicating all state points and the three processes.
Q3//A// In a gas turbine plant compression is carried out in one stage and expansion in one stage turbine. If the maximum temperature (T3K) and minimum temperature (T,K) in the cycle remain constant, show that for maximum work of the plant, the pressure ratio is given by:
In a steady flow process, the working fluid flows at a rate of 240 kg/min. The fluid rejects 120 kJ/s passing through the system. The conditions of fluid at inlet and outlet are given as : C1 = 300 m/s, p1 = 6.2 bar,u1 = 2100 kJ/kg, v1 = 0.37 m3/kg and C2 = 150 m/s, p2 = 1.3 bar, u2 = 1500 kJ/kg, v2 = 1.2 m3/kg. The suffix 1 indicates the conditions at inlet and 2 indicates at outlet of the system. Neglecting the change in potential energy, determine the power capacity of the system in MW.
A cycle operates on air occurs as follows: an isentropic compression 1-2, a constant-pressure expansion 2-3, an isentropic expansion 3-4, and finally a constant volume cooling 4-1. The ratio of compression is 14, the ratio of expansion during constant-pressure expansion is 2, P1=47kPa, T1=32o C, V1=0.2m3. a. Find the heat added b. Find the heat rejected c. Find the work on each process and the net work
An air standard gas turbine engine operates on an overall pressure ratio of 4 and between the temperature limits of 70 F and 1600 F. Assuming constant specific heats, evaluate the compressor work. The efficiencies of compressor and turbine are 0.82 and 0.92, respectively. (a) Assuming constant specific heats, evaluate the compressor work. (b) determine the turbine work (c) determine the thermal efficiencies. Show complete solution on a paper.
Obtain an expression for the ratio of the compressionto-expansion work as a function of n and r.
An engine has the Lenoir thermodynamic cycle as shown in the figure. Given: 1 mol of ideal gas CP,m = 3.5 R P1 = 2 atm ; P2 = 5 atm V1 = 3000 cm3 ; V3 = 6000 cm3 Find the following: Temperature at (P1, V1), (P2, V2), and (P2, V1) QH and Qc (Note; QH comes from Process 1->2; Proces 2-3 is considered isentropic efficiency of the engine
Hi I need help with parts of a thermo practice problem 2 kg of air in a piston cylinder initially at P1=101 kPa, T1= 300 K undergoes a cycle made up of three processes: 1-2 Isothermal compression until the volume is (1/15) of its original value.2-3 Constant Pressure heating3-1 Isentropic Expansion back to the initial state Assume air is an ideal gas with constant specific heats with the following values: Cpo=1.027kJ/kgK; Cvo= 0.740 kJ/kgK; R=0.287 kJ/kgK; ɣ=1.388 Fill in the processes table below and show all work.
n=5 here.
A six-cylinder engine, 4.2 liters 4 strokes supercharged, operating at 5100 rpm has a volumetric efficiency of 90 % (referred to the intake conditions, state 3). The compressor has an adiabatic efficiency of 89% and a mechanical efficiency of 82% in its link with the engine (see the figure below). The compressed air is delivered to the engine cylinders at 59°C and 1.85 bar (intake conditions). The ambient conditions are 20°C and 1 bar (at the inlet of the compressor). Take the gas constant 287 J/kg.K for air, the specific heat Cpair = 1.005 kJ/kg.K and the specific heat ratio k = 1.31 After-cooler Pz " P3 2 3 Engine N. T The temperature of air at the exit of the compressor is (K): Choose. The mass flow rate of the air is (kg/s): Choose. The rate of heat rejection from the after-cooler (intercooler) is (kW) Choose. The power consumed by the compressor is (kW): Choose: The power consumed by the engine to drive the supercharger is (kW): Choose.
What is the best coefficient of performance for a refrigerator that cools an environment at -R, °C and has heat transfer to reservoir at 150.0°C? (b) How much work in joules must be done for a heat transfer of 4186 kJ from the cold environment? (c) What is the cost of doing this if the work costs 0.1 Rs per 3.60 × 10° J (a kilowatt-hour)? (d) How many kJ of heat transfer occurs into the warm environment? where, R, is last two digits of registration no. (e.g. for registration no. 11603309 take R¡ as 9 °C
Determine the cycle thermal efficiency. Obtain the expression for the cycle thermal efficiency as a function of the compression ratio r and ratio of specific heats k.

SEE MORE QUESTIONS

Recommended textbooks for you

Elements Of Electromagnetics

Mechanical Engineering

ISBN:

9780190698614

Author:

Sadiku, Matthew N. O.

Publisher:

Oxford University Press

Mechanics of Materials (10th Edition)

Mechanical Engineering

ISBN:

9780134319650

Author:

Russell C. Hibbeler

Publisher:

PEARSON

Thermodynamics: An Engineering Approach

Mechanical Engineering

ISBN:

9781259822674

Author:

Yunus A. Cengel Dr., Michael A. Boles

Publisher:

McGraw-Hill Education

Elements Of Electromagnetics

Mechanical Engineering

ISBN:

9780190698614

Author:

Sadiku, Matthew N. O.

Publisher:

Oxford University Press

Mechanics of Materials (10th Edition)

Mechanical Engineering

ISBN:

9780134319650

Author:

Russell C. Hibbeler

Publisher:

PEARSON

Thermodynamics: An Engineering Approach

Mechanical Engineering

ISBN:

9781259822674

Author:

Yunus A. Cengel Dr., Michael A. Boles

Publisher:

McGraw-Hill Education

Control Systems Engineering

Mechanical Engineering

ISBN:

9781118170519

Author:

Norman S. Nise

Publisher:

WILEY

Mechanics of Materials (MindTap Course List)

Mechanical Engineering

ISBN:

9781337093347

Author:

Barry J. Goodno, James M. Gere

Publisher:

Cengage Learning

Engineering Mechanics: Statics

Mechanical Engineering

ISBN:

9781118807330

Author:

James L. Meriam, L. G. Kraige, J. N. Bolton

Publisher:

WILEY

SEE MORE TEXTBOOKS