In a steam Rankine power plant, the moisture content of the exhaust steam will by increasing the superheat temperature of the steam at the inlet of the turbine. decrease 4 increase O remains constant none of the above
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- It is known that the increase in the pressure of the boiler increases the thermal efficiencyof the Rankine cycle, but which also generates the problem of excessive humidity in thefinal stages of the turbine. Determine:a) How do we solve this problem?Steam enters the turbine at the rate of 1.5 kg/s with enthalpy of 2300 kJ/kg andexhaust enthalpy of 1200 kJ/kg. Steam is extracted from the turbine at a rate of 0.78kg/s for heating purposes with enthalpy of 2750 kJ/kg. What is the turbine work? A. 1305 kW B. 441 kW C. 2145 kW D. 495 kWA flashed-steam geothermal power plant is located where underground hot water is available as compressed liquid at 2610 kPa and 250 C. The flashed steam enters a turbine at 557 kPa, 98% quality and expands to 10 kPa. The flow rate from the well is 40 kg/s. Mechanical efficiency is 90% and generator efficiency is 92%. Determine the power produced by the plant in KW.
- I need help on the following question: The vapour compression cycle (picture provided), utilises the refrigerant R134a flowing at 0.05 kg s-1. Assuming that the compression is adiabatic and reversible. If the actual input power to the compressor is 2 kW, then: 1. You need to determine the theoretical input power to the compressor and the heat transfer (Φ) to theevaporator. Take the enthalpies h1, h2, and h3 to be 238.41, 263.68 and 81.5 kJ kg-1 (use the 'NH3 Refrigeration Table' where you can find online). 2. You need to determine the coefficient of performance based on your answer to the previous question (1). 3. You need to determine the compressors mechanical efficiency.how do i calculate for a power plant, iv. The rate of heat rejection at the condenser; andv. Determine the rate of entropy generation in that power plant. Please provide exampleA flashed-steam geothermal power plant is located where underground hot water is available as saturated liquid at 620 kPa. The flashed steam enters a turbine at 530 kPa, 98 % quality and expands to 15 kPa, when it is condensed. The flow rate from the well is 27.8 kg/s. Over-all efficiency is 90%. Determine the power produced by the plant in KW.
- A flashed-steam geothermal power plant is located where underground hot water is available as saturated liquid at 600 kPa. The flashed steam enters a turbine at 529 kPa, 98 % quality and expands to 15 kPa, when it is condensed. The flow rate from the well is 28.9kg/s. Over-all efficiency is 90%. Determine the power produced by the plant in KW.The enthalpy entering the turbine of a geothermal power plant is 2750 KJ/kg and ,ass rate of 1 Kg/sec. The turbine brake power is 1000 KW condenser outlet has enthalpy of 210 KJ/kg. If temperature rise of cooling water in condenser is 8, what is the mass of cooling water requirement?In a marine gas turbine unit, a high-pressure stage turbine drives the compressor and a low-pressure stage turbine drives the propeller through suitable gearing. The overall pressure ratio is 4/1 and the maximum temperature is 650 o the isentropic efficiencies of the compressor, H. P. turbine, L. P. turbine are 0.8, 0.83 and 0.85 respectively and the mechanical efficiency of both shafts is 98 %. Sketch the process on the T-s diagram i. Calculate the pressure between turbine stages when the air intake conditions are 1.01 bar and 25 oC. ii. Calculate also the thermal efficiency and the shaft power when the mass flow is 60 kg/s. NB: Neglect kinetic energy changes and the pressure loss in combustion.
- A turbine engine air intake is at pressure and temperature of air drawn 99 kPa and 29 0C respectively. The maximum pressure and temperature during the cycle is 990 kPa and 888 0C respectively. The adaibatic index as 1.4. After claculations, the pressure ratio of the cycle is , compressor exit temperature is K, turbine exit temperature is K, net specific work output from the gas turbine engine is in k, thermal efficiency is % and work ratio of the cycle is to I decimal placePls. answer thank you! In a 13 MW geothermal power plant, the mass flow of steam entering the turbine is 30 kg/s. The quality after throttling is 23% and enthalpy of ground water is 730 KJ/kg. Determine the overall efficiency of the plant.Steam enters the high-pressure turbine at 150bar and 550c and low pressure turbine at 40bar and 550c .the condensor pressure is 0.1bar using mollier diagram find 1.the dryness fraction at the end of low pressure turbine 2.efficieny 3.steam rate 4.heat rate 5.work ratio