Question

An air-standard cycle with constant specific heats at room temperature is executed in a closed system and is composed of the following four processes: 1–2 v = Constant heat addition from 14.7 psia and

asked Nov 26, 2020 206k views

An air-standard cycle with constant specific heats at room temperature is executed in a closed system and is composed of the following four processes:

1–2 v = Constant heat addition from 14.7 psia and 80°F in the amount of 300 Btu/lbm
2–3 P = Constant heat addition to 3150 R
3–4 Isentropic expansion to 14.7 psia
4–1 P = Constant heat rejection to initial state
The properties of air at room temperature are cp = 0.240 Btu/lbm·R, cv = 0.171 Btu/lbm·R, and k = 1.4.
a. Show the cycle on P-v and T-s diagrams. (Please upload your response/solution using the controls provided below.) (You must provide an answer before moving on to the next part.)
b. Calculate the total heat input per unit mass
c. Determine the thermal efficiency