SUSTAINABLE ENERGY (LL)
2nd Edition
ISBN: 9780357667224
Author: DUNLAP
Publisher: CENGAGE L
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Chapter 3, Problem 14P
To determine
Calculate the efficiency of the plant.
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A 60 MW steam power station has a thermal efficiency of 30%. If the coal burnt has a calorific value of6950 kcal/kg, calculate :(i) the coal consumption per kWh,(ii)the coal consumption per day.
2. Consider the system described in the news: at night, when there is energy left, water is pumped from a large lake to a reservoir at 80 m above the lake level. During the day, this water is used to generate energy in a turbine located 80 m below the elevated reservoir. Considering that the water flow is always 5000 liters/s (both at the inlet of the reservoir and at the outlet) and that the pump and turbine efficiencies are 70%, what is the power (in kW) required by the pump and the power (in kW) recovered in the turbine. Data: The pipe diameter is always the same along the system (d = 0.5 m); g = 10 m/s2; γ = 9810 N/m3.
Matter transport phenomena;
Please make it typeable as handwriting interferes with understanding
Question 2
Calculate the "Annual Energy Production" of a hydropower system if the maximum power
output of the system is 65.4 kW.
Question 3
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- A 1000 MW coal fired power plant (30% efficiency). The coal is 75% carbon and has a heat content of 10, 000 BTU/lb. What is the carbon emission (ton carbon per year)?A 1000 MW natural gas plant (45% efficiency). The gas is CH4 with a heat content 800 BTU/mol. What is the carbon emission (ton carbon per year)?Calculate carbon emission reduction if the above natural gas plant is used to replace the coal fired plant.(Here ton is metric ton, 1 ton=2,200 lb)arrow_forwardA turbine is rated at 700 hp when the flow of water through it is 0.72 m3/s. Assuming the efficiency is 78%. What is the head acting on the turbine? O 94.79 m O 71.23 m 59.28 m O 111.21 marrow_forwardA turbine develops 500 kW power under a head of 100 metres at 200 r.p.m. What would be its normal speed and output under a head of 81 metres?arrow_forward
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- How many kW are delivered by the water flow to the turbine? O 62 kW O 85 kW O 77 kW O 70 kWarrow_forwardDiscuss the benefits of pumped storage hydropower (PSH).arrow_forwardA generating system consists of the following units:(A) 1 x 10 MW unit(B) 1 x 20 MW unit(C) 1 x 30 MW unit(D) 1 x 40 MW unitThe 10, 20 and 30 MW units have forced outage rates of0.08. The 40 MW unit has afull forced outage rate of0.08 and a 50% derated state which has a probability of0.06. (a) Calculate the LOLE for this system for a single daily peak load of 60 MW. (b) Whatis the LOLE for the same condition if the 40 MW unit is represented as a two-statemodel using an Equivalent Forced Outage Rate?arrow_forward
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