steam power plant Cogeneration steam power plants fueled by natural gas can prod
ID: 1860528 • Letter: S
Question
steam power plant
Cogeneration steam power plants fueled by natural gas can produce electricity cheaper than it can be purchased from the grid. Montana State University's cogen plant is capable of generating 250,000 pounds of steam per hour and 2.7 million kilowatt hours of electricity annually. The three high pressure boilers operate at 280 psig. The steam leaves the turbine at 45 psig and then is distributed throughout the campus via a 1.8 mile utility tunnel before returning as condensate. [1] Model the plant with a Rankine cycle (Figure 11.3) consisting of a boiler (88% efficient), pump (82% efficient), turbine (85% efficient) and an ideal reversible condenser [2]. If the steam leaves the boiler as saturated vapor, what is the overall plant thermal efficiency considering the heat evacuated through the condenser as a loss? In actuality the steam is used to heat buildings and water before being returned to the steam plant as condensate. What is the process efficiency taking into consideration this usable energy output to campus? Estimate the electricity power output from the turbine when the plant is running at 85% steam capacity. In actuality the steam leaving the boiler is superheated. What are the advantages of having the steam superheated in regards to transporting the steam around campus as well as from a thermodynamics perspective? Assume the steam leaves the boiler at 600 degrees Fahrenheit, what is the overall thermal plant efficiency with and without taking into consideration the usable energy output to campus? Estimate ( the electricity power output from the turbine when the plant is running at 85% steam capacity. Should MSU reduce the pressure the steam leaves the turbine and if so to what pressure do you recommend? Take into consideration if the moisture exceeds about 10% not only is there a decrease in turbine efficiency but erosion of the turbine blades may also be a serious problem. Evaluate whether MSU should install a low-pressure turbine to increase its electricity output. Consider that MSU can purchase electricity at about 6.5 cents per kilowatt hour from the grid and $9.10 per thousand cubic feet of natural gas. Assume superheated steam as previously mentioned. Determine the cycle efficiencies if MSU installed an open feed water heater, a second pump and the aforementioned low pressure and high pressure turbines. Estimate the electricity power output when t plant is running at 85% steam capacity. Assume superheated steam as previously mentioned. Include the relevant/Ts graphs, P-v graphs and system schematics. Reading: Sections 11.1-11.7 ScheduleExplanation / Answer
http://www.mem.odu.edu/faculty_staff/taylor/mae411/hw1_solution.pdf
check this pdf.I think you will get it.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.