In 2019, the 5.4-MW capacity MM West Covina Power Plant in California generated 42,896 MWh of electricity and had an average heat rate of 17,039 BTU/kWh from combusting landfill gas. What was its efficiency (expressed in decimal form) that year?
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- In the United States, energy for household heating is generally sold using English units, e.g., therm, gal, and cord. A house in Wisconsin uses 1200 therms of thermal energy during the heating season. Calculate the cost of fuel if the furnace uses (a) natural gas with an efficiency of 70%; (b) No. 2 fuel oil, efficiency 65%; (c) kerosene, efficiency 99.9% (unvented); and (d) wood with l5% moisture with an efficiency of 50%. Use the data in Tables 2.2, 2.7, and 2.13. The efficiencies are based on the HHV. Assume the cost of natural gas is $8/MBtu, the cost of No. 2 fuel oil is $3/gal, the cost of kerosene is $3.50/gal, and the cost of wood is $100/cord. Assume the bulk density of cord wood is 30 lbm/ft3 .The net work produced by a Gas Turbine Power plant is 85 BTU. What is the efficiency of the said plant, if the Heat supplied is 22% more of that net work? A 79.85% B 81.97% (c) 92.87% 98.32%A power plant consumes 3000 tons of coal per day. The coal has an average energy content of 10,000 BTU/lb. The power plant has an overall efficiency of 25%. What is the plant power output in MW? A. 187 B. 183 C. 181 D. 185
- An office heater puts out 2090 Btu (British thermal units) of energy in the form of heat per hour. Given that 1 Btu=1.055 kJ,how many megajoules of energy in the form of heat can be produced per year (365 days) by the heater, assuming continuous operation?During a steady flow process, the pressure of the working substance drops from 180 psia to 30 psia, the speed increases from 210 fps to 1050 fps, the internal energy of the open system decreases 30 Btu/lb, ad the specific volume increases from 2 to 10ft^3/lb.Heat loss is 20 Btu/lb. Determine the horsepower for 12 lb/min mass flow. Ans. 66hpA gasoline engine takes in 16,100.00 J of heat and delivers 3,700.00 J of work per cycle. The heat is obtained by burning gasoline with a heat of combustion of 4.60 x 104J/g. What is the thermal efficiency? How much heat is discarded in each cycle? What mass of fuel is burned in each cycle? If the engine goes through 60.0 cycles per second, what is its power output in kilowatts? In horsepower?
- how do wind turbines work?Question 2 A hydro-electric power station has a reservoir area of 3,8-km2 and a capacity of 9,9 x 106 m3 . The effective head of water is 100 metres. The penstock, turbine and generation efficiencies are 95%, 90%, and 85%, respectively. 2.1 Determine the overall efficiency of the power station (%) and determine the total electrical energy that can be generated from the power station (kWh). 2.2 Determine the depth of the reservoir (metres) 2.3Determine the fall in reservoir volume level is the load of 100 kW is supplied for 5 hours (%).This is Problem 13 of Chapter 3 in Sustainable Energy by Richard Dunlap, 2nd Edition. I need help solving it: A coal-fired generating station has an efficiency of 38% and produces an average electrical output of 1000 MWe.(a) How much coal does it burn per second (kg/s)? Assume the coal is bituminous.(b) How much heat (in joules) is released to the environment per second?(c) How many liters of water at 20°C could the heat in part (b) boil (at STP) per second? For c, here is my idea: use Q = mc(change in T). Here change in T is (100 C - 20 C) or 80 C and c = 4200 J/(kg C) so I can solve for m. Question: I need the density of water to find liters, but density changes with temperature. So, do I use the regular 1000 kg/m^3 or something else?
- As a patent attorney you are asked to verify if a certain patent application should be approved, which means whatever is being patented must be possible/practical to build and work. The patent presents a new power plant designed to use a fuel capable of achieving a maximum temperature of 550 degrees F. The fluid flowing in the power plant system is to be cooled by a lake with temperature equal to 85 degrees F. The patent application indicates the power plant to be capable of achieving 0.78 thermal efficiency. Should this patent application be approved based on the information available? Why?Q6/ Your company produces small power plants that generate electricity by expanding waste process steam in a turbine. You are asked to study the turbine to determine if it is operating as efficiently as possible. One way to ensure good efficiency is to have the turbine operate adiabatically. Measurements show that for steam at 500°F and 250 psia: a. The work output of the turbine is 2.20 x105 Btu. b. The rate of steam usage is 1000 lb/hr. c. The saturated steam leaves the turbine at 14.7 psia and consists of 15% moisture (i.e., liquid H2O). Is the turbine operating adiabatically? Support your answer with calculations.QUESTION 3 (Analysis of steam cycles) A steam power plant operates on a theoretical reheat cycle. Steam at boiler at 140 bar, 500°C expands through the high-pressure turbine. It is reheated at a constant pressure of 40 bar to 500°C and expands through the low-pressure turbine to a condenser at 0.1 bar. 3.1 Draw T-s and h-s diagrams