Sep 19, 2017

AIR IS EXPANDED TO PERFORM WORK IN A PISTON-CYLINDER ASSEMBLY. THE AIR IS INITIALLY AT P 1…

This paper concentrates on the primary theme of AIR IS EXPANDED TO PERFORM WORK IN A PISTON-CYLINDER ASSEMBLY. THE AIR IS INITIALLY AT P 1… in which you have to explain and evaluate its intricate aspects in detail. In addition to this, this paper has been reviewed and purchased by most of the students hence; it has been rated 4.8 points on the scale of 5 points. Besides, the price of this paper starts from £ 40. For more details and full access to the paper, please refer to the site.

Air is expanded to perform work in a piston-cylinder assembly. The air is initially at P1 = 35 bar and T1 = 2000 K, and the expansion ratio rv ( = v2/v1) is 7. The ambient temperature T0 = 298 K and pressure P0 = 1 bar. Note P0 = P0. Assume variable cp(T) (use Tables A.7 for properties).

a. Determine the useful work in kJ kg–1 that is delivered for an isentropic process.

b. If process is non adiabatic and P2 = 2.5 bar, what are the absolute closed system availabilities at the initial and final states? What is the dead state absolute availability ϕ0?

c. Determine the optimum and useful optimum work and heat loss from the air for optimum process in kJ kg–1. What is the optimum useful work in kJ kg–1 if the final state is dead state?

d. If a dynamometer measures the useful work to be 0.8 kJ for non-adiabatic process (case b) and the initial volume V1 = 0.000205 m3, determine (i) work delivered by gas in kJ, (ii) the heat loss in kJ, (iii) irreversibility (or lost work) in kJ, and (iv) entropy generated in kJ K–1 during the process.


100% Plagiarism Free & Custom Written,
Tailored to your instructions


International House, 12 Constance Street, London, United Kingdom,
E16 2DQ

UK Registered Company # 11483120


100% Pass Guarantee

Order Now

STILL NOT CONVINCED?

We've produced some samples of what you can expect from our Academic Writing Service - these are created by our writers to show you the kind of high-quality work you'll receive. Take a look for yourself!

View Our Samples

FLAT 25% OFF ON EVERY ORDER.Use "FLAT25" as your promo code during checkout