Avapour compression machine circulates nh3; the condenser and evaporator pressure being 1170kpa and 270 kpa respectively after isentropic compression. the vapor compression refrigeration system working on r-12 having condensing temperature of -10°c. if the suction temperature is increased to +10°c, with the same condensing temperature, calculate (i) c. o.p. (ii) power/ton for each conditions. assume simple saturated cycle and discuss your result.

Steam at a pressure of 100 kpa and a quality of 50% initially fills a rigid vessel having a volume of 0.5 m^3. the steam is then heated, causing the pressure in the vessel to rise to 150 kpa. determine: i. the mass of the steam in the vessel. ii. the temperature and quality of the steam after the heating process. ii the mass of the vapour, mg and liquid, m in the vessel after the heating process. if the steam in the vessel is now further heated, what would the pressure and temperature in the vessel be when all steam has turned into saturated vapour? b. sketch the processes in part (a) and part (b) on p-v and t-v diagrams, indicating clearly the temperatures, pressures and the paths. c. (0.59kg, 111.4°c, 73%, 0.4307kg, 0.1 593kg, 2.11 bar, 121.84°c)