参考号：EM131039

1. The initial conditions for an air-standard Otto cycle operating with a compression ratio of 8:1 are 95 kPa and 17^oC.压缩冲程开始时，气缸体积为2.20 L（1L = 0.001 m³)and 3.60 kJ of heat is added during the constant volume heating process. Calculate the pressure and temperature at end of each process of the cycle, and determine the thermal efficiency and mean effective pressure of the cycle.

2. An ideal Rankine cycle uses water as a working fluid, which circulates at a rate of 80 kg/s. The boiler pressure is 6 Mpa, and the condenser pressure is 10 kpa. The water enters the turbine at 600 C and leaves the condenser as a saturated liquid. Assume that the heat is transferred to the working fluid in the boiler from a reservoir at 1400 K and that the fluid in the condenser rejects heat to the surroundings at 25 C. Calculate the following quatities: (a) The power required to operate the pump; (b) The heat-input rate to the water in the boiler; (c) The power developed by the turbine

3.理想的布雷顿周期使用空气作为工作流体。空气以101 kPa和37 C进入压缩机。压缩机的压力比为12：1，涡轮机离开时的空气温度为497 C.分别为100 kPa。使用空气标准假设并确定以下数量：（a）操作压缩机所需的每单位质量工作；（b）涡轮机产生的每单位质量工作；（c）在燃烧过程和排气过程中每单位质量的热传递；（d）假设分别为低温和高温储层AR 37 C和1300 C的温度，循环的不可逆性为单位质量；（e）周期的热效率。