1.A boiler consumes 16,800 pounds of fuel/hour when producing 210,000 pounds steam/hour at 620 psia and 800° F from feed water at 650 psia and 300° F. The heating value of the fuel is 18,500 Btu/pound and the furnace volume is 1250 ft³. Calculate the furnace heat-release rate, Btu/hr-ft A 324,500 Btu/hr-ft B 248,600 Btu/hr-ft C. 232,500 Btu/hr-ft D. 143,500 Btu/hr-ft

1.A boiler consumes 16,800 pounds of fuel/hour when producing 210,000 pounds steam/hour at 620 psia and 800° F from feed water at 650 psia and 300° F. The heating value of the fuel is 18,500 Btu/pound and the furnace volume is 1250 ft³. Calculate the furnace heat-release rate, Btu/hr-ft A 324,500 Btu/hr-ft B 248,600 Btu/hr-ft C. 232,500 Btu/hr-ft D. 143,500 Btu/hr-ft

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

Biomass is used as fuel to power the following cogeneration plant on a school. The turbine drives an electric generator to produce electricity, and part of the steam is extracted to provide heating to campus buildings. The boiler provides 106 kg/h of steam at 6 MPa, 520 °C, of which 4x105 kg/h is extracted between the first and second turbine stages at 1 MPa and diverted to the building heating load. Condensate returns from the building heating load at 0.95 MPa, 115 °C, and it is mixed with liquid exiting the lower pressure pump at 0.95 MPa. The entire flow is then pumped to the boiler pressure. Saturated liquid at 6 kPa leaves the condenser. The turbine stages and the pumps operate with isentropic efficiencies of 89 and 85%, respectively. The efficiency of the electric generator is 93% for converting turbine mechanical power into electricity. Calculate the heating load in kJ/h. Calculate the electric power generated in MWe.
QUESTION 1 The economiser of a steam boiler receives its feed water at 34.6°C and supplies the evaporator at a temperature of 60.1°C. The water is then heated at a constant pressure of 600kPa and delivered with a dryness fraction of 0.73. The super-heater dries and superheats the steam to a specific volume of 0.394m³/kg. Determine the: specific volume of the wet steam;
A 2,000-MW (el) power plant working at 30% thermal efficiency 100% of the time (base load) uses coal (with formula CH) and a heating value of 25 MJ/kg. Determine the rate of the mass of coal burned, M (tons/yr). How much CO2 does this plant emit (metric tons/y)? Theoretically, 1 g of coal produce 3.38 g of CO2
A natural gas-fired condensing boiler has a heating capacity of 38 kW. The fuel heating values are LHV = 49 MJ/kg and HHV = 55 MJ/kg. The boiler efficiency based on HHV is 0.87. Determine the fuel consumption rate in the boiler and the boiler efficiency based on LHV.
A heat pump cycle using water as the working fluid consists of a compressor, a condenser, an expansion valve, and an evaporator. Saturated vapor with mass flow rate of 1 kg/s at 0.5 MPa (state 1) enters the condenser and leaves it as saturated liquid at the same pressure (state 2). The pressure in the evaporator is 0.01 MPa. The condenser and the evaporator processes are isobaric. The compressor is adiabatic and reversible. The valve is adiabatic. A. List all the known information and assumptions. B. Determine the heat output of the condenser (QH) C. Determine the heat input of the evaporator(Qc) D. Determine the coefficient of performance of the heat pump. E. Determine the coefficient of performance of a Carnot heat pump running between the same temperatures TH and TC at the evaporator and condenser. F. Calculate the entropy generation in the compressor. G. Draw the TS diagram for the cycle on paper. (Hint: you must calculate T1, T2, T3, T4, h1, h2, h3, h4, s1, s2, s3, s4, and draw…
NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. The gas-turbine cycle of a combined gas–steam power plant has a pressure ratio of 8. Air enters the compressor at 290 K and the turbine at 1400 K. The combustion gases leaving the gas turbine are used to heat the steam at 15 MPa to 450°C in a heat exchanger. The combustion gases leave the heat exchanger at 247°C. Steam expands in a high-pressure turbine to a pressure of 3 MPa and is reheated in the combustion chamber to 500°C before it expands in a low-pressure turbine to 10 kPa. The mass flow rate of steam is 12 kg/s. Assume isentropic efficiencies of 100 percent for the pump, 85 percent for the compressor, and 90 percent for the gas and steam turbines. A.) Determine the mass flow rate of air in the gas-turbine cycle. Use steam tables and the table containing the ideal-gas properties of air. The mass flow rate of air in the gas-turbine cycle is ___?___kg/s…
calculate the amount of heat required to generate 3000 kg of dry saturated steam at a pressure of 8 bar from water available at 30°C.
Condenser a steam power plant that operates on a simple ideal ranking cycle and has a net power output of 22MW. Steam enters the turbine at 7Mpa and 450.05°C and is cooled in the condenser at a pressure of 10kpa by running cooling water from a lake through the tubes of the condenser at rate of 1750 kg/s. Determine the mess flow rates of steam through the steam turbine assuming that the cp of superheated steam is 2.9593kJ/kg.K.
A boiler furnace releases 10 400 kj of heat for each kg of fuel burned and produces dry staturated steam at 14000 kpa from feedwater at 200 degrees celcius . How many kg of steam will be produced for each kg of fuel burned if the boiler had an efficiency of 66% ? .
For the Rankine Cycle Plant shown below, determine the mass flow rate of steam required to produce a net power output of 55 MW if the net work output is 1386 kJ/kg. Determine your answer in kg/s and present it correct to two decimal places. Feed Pump 1 Answer: 2 5 Boiler wwwwww wwwwwww Reheater Condenser LP Turbine 3 6 4 HP Turbine
DESIGN a steam power plant that produces 70 MW of power. The plant should have an open heater and a reheater operating simultaneously utilizing saturated steam from the partial expansion of steam in the turbine. The remaining steam is reheated to the inlet temperature of steam when it enters the turbine. Another open heater is used to bled saturated steam when the steam partially expands in the turbine after reheating, remaining steam is expanded to the exhaust pressure of the turbine. Other pertinent data are as follows: steam turbine: inlet pressure – 6.6 MPa; inlet temperature - 420 C; exhaust pressure – 10 KPa; stages of turbine – all pressure compounded stage; pumps – 90% efficient; shaftings – 75%% efficient; generator – 95% efficient. DRAW a line diagram of the design plant indicating the pressure, temperature and enthalpy at each point and specify the following: a) the mass requirement of the steam plant in kg/hr b) the masses extracted in kg/hr and c) the plant thermal…
a. Sketch the process on a P-V diagram b. Determine the rate of heat transfer from Boiler ( Qcv/m 1-2, in KJ/kg) c. Determine the rate of heat transfer from condenser ( Qcv/m 3-4, in KJ/Kg) d. Using the Clausius inequality to determine if the cycle is internally reversible, irreversible, or impossible. e. Determine the thermal efficiency of power cycle f. Determine the maximum thermal efficiency of power cycle ( Carnot Efficiency) g. Due to part (e & g) this cycle is___________ ? - internally reversible -internally irreversible -impossible