3. A steam power plant has an average monthly net power delivery of 740 MW over the course ofa year. This power delivery is accomplished by burning coal in the boiler. The coal has a heatingvalue of 9150 Btu/lbm. The cost of the coal is $14.20/ton. The overall thermal efficiency of theplant is,nthWnetQboiler0.26 = 26%Determine the annual cost of the coal required to deliver the given average monthly power.

Annual cost = Monthly cost x 12 months Annual cost = $5.474 x 10^6/month x 12 months Annual cost =…

Answered: 3. A steam power plant has an average…

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter8: Natural Convection

Section: Chapter Questions

Problem 8.46P

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3. A simple steam power plant illustrated below uses 20 kg/s of steam. Find: a) the boiler heat transfer rate; b) the turbine power output; c) the condenser duty; d) the pump power required. What is the ratio of net power out to heat in (the thermal efficiency)? The turbine and the pump are adiabatic 2 Boiler Pump 2 3 |3|4 Stream T(°C) P(MPa) 40 40 Turbine 600 x = 1 Condenser 0.01 10 10 0.01 A
Thermal efficiency of a power cycle is 0.8. For the cycle, Wnet = 250 kJ. Determine Qout in kJ.
29. The work steady flow for an open system is 3.12 HP. During steady flow process, the pressure of the working substance drops from 200 psia to 20 psia and the speed increases from 200 to 1000 fps. The internal energy decreases 25 BTU/lbm and the specific volume increases from 1 ft^3/lbm to 8 ft^3/lbm. Sketch the pV diagram and computenthe heat in HP for 10 lbm/min of the substance.
A certain coal-fired power plant has a rated power capacity of P = 950 MW. The output of this plant is W = 0.39QH, where QH is the energy input as heat from the hot reservoir. a. Calculate the maximum thermal efficiency of the power plant. b. Calculate the absolute value of the exhausted heat (QC) each second in MJ for the power plant. c. How many tons nC of this coal is exhausted as wasted heat to QC in a single day?
A split air conditioner is used to heat an office in winter and cool it in summer.For this purpose, a split air conditioner with a cooling power of 1200 Btuh (3.5 kw) is used for the office. The power drawn by the split air conditioner is 1.2 kw accordingly. a) COP value b) If the outdoor temperature of the air conditioner is kept 22 C in summer, calculate the limit values for heating and cooling COP if the outdoor temperature in summer is 42C and the outside temperature in winter is -6C
Thermodynamics PLEASE FILL UP THE TABLE WITH ALL NUMBERS. THANK YOU 9.17 A steam power plant operates with 5 MPa high pressure and boiler exit at 700°C, whereas the condenser exit is at 50°C. Find the cycle efficiency and the pressure in the turbine where the water enters the two-phase region.
Evaluate the following two resources for energy generation via a heat engine (Rankine cycle steam turbine). From a thermal efficiency and a practical standpoint (all else equal) which would you recommend. a. An ocean location where Tcold is 0 degC and Thot from a thermal flow is 150degC. b. A land location where the geothermal steam resource is 450K and the system is exhausting to ambient temperature at 293K.
A refrigeration cycle operating Qout = 1000 Btu and Wcycle = 300 Btu. Determine the coefficient of performance for the cycle (NOT in %).
Please show complete solutions and detailed drawings. Show conversions, units, and box in the final answers
The following data for the R-12 refrigeration system as shown are as follows: Evaporator 1 0 OC 30 TOR Evaporator 2 -10OC 20 TOR Evaporator 3 -20OC 10 TOR Condenser 20OC Assume simple saturation and isentropic compression and determine the following: a) Draw the h-s diagram b) The refrigerant flow in each evaporator c) Total work of compression, WC in kW d) Heat rejected in the condenser, QR in kj/min e) Coefficient of performance
c) A refrigerator is used to keep the cold space at -5 °C by rejecting 8 kJ/s of heat by the condenser to the outdoor air at 25 °C. If the compressor consumes 3 kJ/s of power, determine the rate of heat removed from the cold space (kJ/s), the COP of the refrigerator i. ii. iii. the minimum power input to the compressor for the same rate of heat removed (kJ/s), and draw the schematic of the refrigerator as a reversed heat engine. iv.
Estimate the greenhouse gas emissions from power production for the following threescenarios. Focus on the greenhouse gas emissions associated with theoperational energy, not the greenhouse gas emissions associated with the manufacture of theproduct or end of life processes.The hourly load demand for a home is given.1) All power during an hour of up to 5 kW is drawn from a baseload coal powerplant. Any power in excess of that amount is drawn from a peaker plant running as anatural gas combined cycle power plant.2) Localized solar energy production is provided in the table on the next page.Energy demand by the house is first met by this solar generation. If the total hourlyenergy demand is below 5 kW, then any extra energy required beyond that provided bythe solar panels is drawn from a coal power plant. If the total hourly demand is above 5kW, then any extra hour demand beyond 5 kW is met by a natural gas combined cyclepower plant. No credit is given if the solar energy production…

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