Agas undergoes a cycle in a piston–cylinder assembly consisting of the following three processes: process 1–2: constant pressure, p = 1.4 bar, v1 = 0.028 m3, w12 = 15 kj process 2–3: compression with pv = constant, u3 = u2 process 3–1: constant volume, u1 - u3 = -25 kj there are no significant changes in kinetic or potential energy. (a) calculate the net work for the cycle, in kj. (b) calculate the heat transfer for process 1–2, in kj.

Apiston-cylinder with a volume of 0.25 m3 holds 1 kg of air (r 0.287 k/kgk) at a temperature of 100 c. heat transfer to the cylinder causes an isothermal expansion of the piston until the volume triples. how much heat is added to the piston-cylinder?

Give heat transfer applications for the following, (i) gas turbines (propulsion) ) gas turbines (power generation). (iii) steam turbines. (iv) combined heat and power (chp). (v) automotive engines

Consider a large isothermal enclosure that is maintained at a uniform temperature of 2000 k. calculate the emissive power of the radiation that emerges from a small aperture on the enclosure surface. what is the wavelength ? , below which 10% of the emission is concentrated? what is the wavelength ? 2 above which 10% of the emission is concentrated? determine the wavelength at which maximum spectral emissive power occurs. what is the irradiation incident on a small object placed inside the enclosure?