Explain what is the daily input rate of coal

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A 680 MW coal fired power plant is 34% efficient at producing electricity. The coal has a heating value of 20,000 kJ/kg, an ash content of 5.5% and a sulfur content of 4.5%. Note: 1 MW = 1000 kW , and 1 kW = 1 kJ/s.

a. What is the daily input rate of coal (kg/day)?

b. If the efficiency of ash capture is 98.6%, how much ash is emitted into the air, kg/day?

c. How much heat is emitted to the environment (kJ/day)?

d. If 82% of the heat emitted is to be removed by cooling water, calculate the flow rate of water (in lb/day) if the water is initially at 65 oF and rises to 95 oF. Note that 1 Btu = 1.055 kJ and that the Cp for water is 1.0 Btu/(lb- oF).

Reference no: EM13186492

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