The maximum efficiency of a steam turbine cycle with a steam temperature of 556oC and a cooling water temperature of 27oC is (give your answer in %) ______________.
T(hot) = 556 + 273 = 829K
T(cold) = 27 + 273 = 300K
Efficiency (%) = [T(hot) - T(cold)] x 100 / T(hot)
Efficiency (%) = [829 - 300] x 100 / 829
Efficiency (%) = 63.8%
The maximum efficiency of a steam turbine cycle with a steam temperature of 556oC and a...
a) The temperature of the
steam at the turbine exit
b) Thermal efficiency of the cycle
c) the mass flow rate of the steam
Part 2 of 4 Required information NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part Consider a steam power plant that operates on a reheat Rankine cycle and has a net power output of 80 MW. Steam enters the high-pressure turbine at 10 MPa and...
Combined Gas and Steam Power Plant The highest temperature at the inlet of a gas turbine can be 1600oC. The temperature of the ambient air is 27oC. Determine the maximum pressure ratio and the associated efficiency. Determine the conditions (temperatures and pressure) at the various points of the cycle. What’s the maximum temperature of the exhaust gases? Determine the amount of natural gas required for a 500 MW plant. Determine the associated emissions. What’s the total amount of exhaust gas?...
A combined gas-steam power plant uses a simple gas turbine for
the topping cycle and a simple Rankine cycle for the bottoming
cycle. Atmospheric air enters the compressor at 101 kPa and 20 °C,
and the maximum gas cycle temperature is 1100 °C. The
compressor pressure ratio is 8. The gas stream leaves the heat
exchanger at the saturation temperature of the steam flowing
through the heat exchanger. Steam enters the heat exchanger at a
pressure of 6 MPa and...
Combined cycle power plants are common because of their high efficiency and scalability. They typically combine a gas turbine cycle (the Brayton Cycle) with a steam turbine cycle (the Rankine Cycle) [1]. The goal of this project is to determine the operating efficiency and profitability of a realistic combined cycle power plant. The power plant is as follows: 1. A natural gas-fired Brayton cycle with mÛ air,Br = 1.25 kg s−1 . (a) Ambient air at 1 bar and 300...
1. A combined gas-steam power cycle uses a single gas turbine
cycle for the air cycle and a simple Rankine cycle for the water
vapor cycle. Atmospheric air enters the compressor at a rate of
88.2 lbm / s, at 14.7 psia and 59 ° F, and the maximum gas cycle
temperature is 1,742 ° F. The pressure ratio in the compressor is
7. The isentropic efficiency of both the compressor and the turbine
is 80%. Gas exits the heat...
. A steam power plant that operates on Rankine cycle has a net power output of 45 MW. Steam enters the turbine at 7 MPa and 500o C and is cooled in the condenser at a pressure of 10 kPa by running cooling water from a sea through the tubes of the condenser at rate of 2000 kg/s. Show the cycle on T‐s diagram with respect to saturation line, and determine (a) the thermal efficiency of the cycle, (b) the...
2. Ideal Rankine cycle. The condenser pressure is 4 psia. Steam goes into turbine at 1100F and 1300 psia. The mass flow rate of steam is 2,000,000 lb/h. Cooling water from a lake flows through the condenser at 95,000,000 lb/hr and comes into the condenser at 63F. Determine: a) The net power made (BTU/h) b) Rate of heat transfer in the condenser (BTU/h) c) Overall thermal efficiency (%) d) The outlet temperature of the cooling water (F)
An existing steam turbine operating on a reheat Rankine cycle in
which the first stage turbine has an inlet pressure of 12.5MPa and
inlet temperature of 550 degree celcius. The second stage has an
inlet temperature of 500 degree celcius. Assuming both turbines and
water pump run at 100% isentropic efficiency. The steam leaves the
condenser as saturated liquid at 15kPa.
Based on the set up above, the engineer decides to add an open
feedwater heater (FWH) to the reheat...
A power plant using a Rankine power generation cycle and steam operates at a temperature of 80 oC in the condenser, a pressure of 2.5 MPa in the boiler, and a maximum boiler temperature of 700 oC. Draw the two cycles described below on a temperature-entropy diagram for steam, and answer the following questions. a) What is the efficiency of this power plant, assuming the pump and turbine operate adiabatically and reversibly? What is the temperature of the steam leaving...
Steam enters the turbine of a power plant operating on the Rankine cycle at 3300 kPa and exhausts at 50 kPa. To show the effect of superheating on the performance of the cycle, calculate the thermal efficiency of the cycle and the quality of the exhaust steam from the turbine for turbine-inlet steam temperature of 550°C. The Rankine cycle is shown in the following figure: The thermal efficiency of the cycle is O The quality of the exhaust steam is...