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Find the boiler efficiency using the values given
Fuel BFW flow BFW supply BFW to steam...
An industrial boiler produces 68,000 kg/hr of saturated steam at 4.5 MPa using residual fuel oil...
An industrial boiler produces 68,000 kg/hr of saturated steam at
4.5 MPa using residual fuel oil (No. 6 fuel oil). The ambient air
temperature is 255 K, which is also the temperature of the oil
storage tank. There is no air preheater but the oil is preheated to
373 K. The oil is pressurized to 5 MPa. There is a 50 mm water
pressure drop across the air ducts and wind box. An economizer
heats the feed water to 400...
A Rankine Cycle based steam power plant produces 200 MW of power. Steam exits the boiler...
A Rankine Cycle based steam power plant produces 200 MW of power. Steam exits the boiler at 3 MPa and 500° C. The turbine exit is at 40 kPa. Isentropic efficiencies of the turbine and pump are 75% and 70% respectively. Show the cycle on a T-s diagram Calculate the mass flow rate of steam Determine the heat transfer rates in the boiler and condenser in MW Determine the cycle efficiency Determine the mass flow rate of the condenser cooling...
Question 2: A steam power cycle operates such that the steam exits boiler at 4 MPa,...
Question 2: A steam power cycle operates such that the steam exits boiler at 4 MPa, 400C and the condenser pressure is 10 kPa. The efficiency of the turbine and pump is 85% and 90% respectively. a. Draw the process on a Ts diagram and calculate the thermal efficiency. b. If the plant produces 100MW of net power, - what is the steam flowrates in kg/hr? - If the plant uses natural gas as a fuel, determine the flowrate of...
Consider the Rankine cycle below with steam flow rate of 5kg/s. The steam receives heat from...
Consider the Rankine cycle below with steam flow rate of 5kg/s. The steam receives heat from the combustion gases in the furnace of the generator; assume the combustion gases change temperature from 2000°K to 425 K in flowing through the steam generator. The cooling water enters the condenser 20°C and leaves at 40°C. Assume the flow in the pump and the turbine is adiabatic and internally reversible. Also assume the combustion gas has the properties of air. If To is...
1. Water enters the constant 130-mm inside-diameter tubes of a boiler at 7 MPa and 65°C...
1. Water enters the constant 130-mm inside-diameter tubes of a boiler at 7 MPa and 65°C and leaves the tubes at 6 MPa and 450°C with a velocity of 80 m/s. Calculate the velocity of the water at the tube inlet and the inlet volume flow rate. [5-14] 2. Air enters a nozzle steadily at 50 psia, 140°F, and 150 ft/s and leaves at 14.7 psia and 900 ft/s. The heat loss from the nozzle is estimated to be 6.5...
3. A six cylinder, four-stroke cycle SI engine with multipoint fuel injection has a displacement of...
3. A six cylinder, four-stroke cycle SI engine with multipoint fuel injection has a displacement of 2.4 liters (0.0024 m). The engine operates on a hydrocarbon fuel with H/C = 1.9 and MW =105 kg/kmol, at an equivalence ratio of 1.05. Each cylinder has one fuel injector fired once per cycle. The flow rate for the injector when continuously open is 0.003 kg/s. Consider the wide-open throttle, peak power operating point where the design volumetric efficiency is 90% and the...
Steam Generator air (inlet) - 320°C P. = 100 kPa th =0.5 kg/s heat exchanger -...
Steam Generator air (inlet) - 320°C P. = 100 kPa th =0.5 kg/s heat exchanger - water (inlet) T = 20°C Pw = 100 kPa m = 0.025 kg/s Problem sketch Solve with EES. Document all necessary balances The problem sketch illustrates a heat exchanger in which hot air is used to generate steam. Air enters the heat exchanger at 1a, in = 320C, Pa = 100 kPa, and ma -0.5 kg/s. Model air as an ideal gas with constant...
2. (50 pts.) Consider a steady-state, steady-flow, regenerative power cycle with one closed feedwater heater. The...
2. (50 pts.) Consider a steady-state, steady-flow, regenerative power cycle with one closed feedwater heater. The mass flow rate of water going through the steam generator is 8 kg/s. The figure and table below provide some of the data needed for solving this problem, eg. you do not need to look up enthalpies in the tables. Calculate (a) The extracted flow fraction "a (b) The total turbine power (kW) (c) The total pump power (kW) (d) The boiler heat transfer...
only question e, f, i, j, k You will need graph paper, a calculator, a copy...
only question e, f, i, j, k
You will need graph paper, a calculator, a copy of Appendix I from lesson HTC- 4 2 and access to steam tables to answer this TMA l. A fuel gas consists of 75% butane (C4H10), 10% propane (C3H8) and 15% butene (C,H,) by volume. It is to be fed to the combustion chamber in 10% excess air at 25°C, where it is completely burnt to carbon dioxide and water. The flue gases ane...
Consider a modern extra-supercritical pressure steam power plant that operates Rankine cycle with one open feedwater...
Consider a modern extra-supercritical pressure steam power plant that operates Rankine cycle with one open feedwater heater, one closed feedwater heater, and one reheater, as shown below. Steam enters the high-pressure turbine at 32 MPa and 700 °C and is condensed in the condenser at a pressure of 10 kPa. Steam exits the high-pressure turbine at 4 MPa and is routed into a reheater (inside the boiler) to be reheated to 640 °C. Steam at P-8 MPa is extracted from...
An industrial boiler produces 68,000 kg/hr of saturated steam at
4.5 MPa using residual fuel oil (No. 6 fuel oil). The ambient air
temperature is 255 K, which is also the temperature of the oil
storage tank. There is no air preheater but the oil is preheated to
373 K. The oil is pressurized to 5 MPa. There is a 50 mm water
pressure drop across the air ducts and wind box. An economizer
heats the feed water to 400...
Question 2: A steam power cycle operates such that the steam exits boiler at 4 MPa, 400C and the condenser pressure is 10 kPa. The efficiency of the turbine and pump is 85% and 90% respectively. a. Draw the process on a Ts diagram and calculate the thermal efficiency. b. If the plant produces 100MW of net power, - what is the steam flowrates in kg/hr? - If the plant uses natural gas as a fuel, determine the flowrate of...
Consider the Rankine cycle below with steam flow rate of 5kg/s. The steam receives heat from the combustion gases in the furnace of the generator; assume the combustion gases change temperature from 2000°K to 425 K in flowing through the steam generator. The cooling water enters the condenser 20°C and leaves at 40°C. Assume the flow in the pump and the turbine is adiabatic and internally reversible. Also assume the combustion gas has the properties of air. If To is...
1. Water enters the constant 130-mm inside-diameter tubes of a boiler at 7 MPa and 65°C and leaves the tubes at 6 MPa and 450°C with a velocity of 80 m/s. Calculate the velocity of the water at the tube inlet and the inlet volume flow rate. [5-14] 2. Air enters a nozzle steadily at 50 psia, 140°F, and 150 ft/s and leaves at 14.7 psia and 900 ft/s. The heat loss from the nozzle is estimated to be 6.5...
3. A six cylinder, four-stroke cycle SI engine with multipoint fuel injection has a displacement of 2.4 liters (0.0024 m). The engine operates on a hydrocarbon fuel with H/C = 1.9 and MW =105 kg/kmol, at an equivalence ratio of 1.05. Each cylinder has one fuel injector fired once per cycle. The flow rate for the injector when continuously open is 0.003 kg/s. Consider the wide-open throttle, peak power operating point where the design volumetric efficiency is 90% and the...
Steam Generator air (inlet) - 320°C P. = 100 kPa th =0.5 kg/s heat exchanger - water (inlet) T = 20°C Pw = 100 kPa m = 0.025 kg/s Problem sketch Solve with EES. Document all necessary balances The problem sketch illustrates a heat exchanger in which hot air is used to generate steam. Air enters the heat exchanger at 1a, in = 320C, Pa = 100 kPa, and ma -0.5 kg/s. Model air as an ideal gas with constant...
2. (50 pts.) Consider a steady-state, steady-flow, regenerative power cycle with one closed feedwater heater. The mass flow rate of water going through the steam generator is 8 kg/s. The figure and table below provide some of the data needed for solving this problem, eg. you do not need to look up enthalpies in the tables. Calculate (a) The extracted flow fraction "a (b) The total turbine power (kW) (c) The total pump power (kW) (d) The boiler heat transfer...
only question e, f, i, j, k
You will need graph paper, a calculator, a copy of Appendix I from lesson HTC- 4 2 and access to steam tables to answer this TMA l. A fuel gas consists of 75% butane (C4H10), 10% propane (C3H8) and 15% butene (C,H,) by volume. It is to be fed to the combustion chamber in 10% excess air at 25°C, where it is completely burnt to carbon dioxide and water. The flue gases ane...
Consider a modern extra-supercritical pressure steam power plant that operates Rankine cycle with one open feedwater heater, one closed feedwater heater, and one reheater, as shown below. Steam enters the high-pressure turbine at 32 MPa and 700 °C and is condensed in the condenser at a pressure of 10 kPa. Steam exits the high-pressure turbine at 4 MPa and is routed into a reheater (inside the boiler) to be reheated to 640 °C. Steam at P-8 MPa is extracted from...
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