Steam at 5.2 MPa, 400 o C expands in a Rankine turbine to 0.036 MPa. For 136 kg/s of steam, determine the work, the thermal efficiency, and the steam rate: a.) For the cycle, b.) For the turbine, c.) and For an actual turbine with the same specifications, with the brake steam rate is at 4.80 kg/kWh and the driven electric generator has an efficiency of 93%. Find: 1. Brake Thermal Efficiency, ℮ b 2. Brake Engine Efficiency, ɳ b 3. Combined work, W k 4. Quality of actual exhaust steam

A steam plant operates on the cycle given below. S The pressure levels are 10 kPa and 6000 kPa, and steam leaves the turbine as saturated vapor. The pump efficiency is 0.70, and the turbine efficiency is 0.75. Determine the thermal efficiency of the plant. The thermal efficiency of the plant is

yale L 15 A gas power cycle uses air as the working fluid and has two turbine sections as shown in the figare below. The power produced by Turbine I is used to drive the compressor, and Turbine 2 produces output power W. Air enters the compressor with a semperature of 290 K and a mass flow rate of -2 (kgs] (State I); the air exits the compressor at 44SK (State 2). Heat is transferred from a high- temperature thermal reservoir, Ta- 1400 [K), to Heat Exchanger 1 at a rate Q,- The lemperature of the air is raised to 1100 [K] (State 3) as it flows through Heat Exchanger 1. The air enters Turbine I where it is expanded to State 4. The flow then proceeds to Turbine 2 and exits with a temperature of 500 (K] (State 5). Heat is then removed from the air through Heat Exchanger 2 at a rate Q which is rejectod to the low-temperature thermal reservoir, TL-200 (K). (A) Determine the temperature at the inlet to Turbine 2, Te (b) Calculate the power output from Turbine 2, W. (e) Calculate the rate of…

Carnot heat engine which produces 10 kJ of work for one cycle has a thermal efficiency of 50 percent. The working fluid is 0.50 kg of air, and the pressure and volume at the beginning of the isothermal expansion are 7 bars and 0.119 m3, respectively. Find  a. the maximum and minimum temperatures for the cycle, in degrees Kelvin,  b. the net work , and c.  the volume at the end of the isothermal expansion process , in m3.