Question

A coal-fired power plant with a heat rate of 7000 Btu/kWh burns coal with an energy content of 16,000 kJ/kg. About 15% of thermal losses go up the stack and 85 % are taken away by cooling water. The coal content includes 70-percent carbon and 2-percent sulfur. a) What is the efficiency of the plant? b) How much coal must be burned per kWh delivered? c) What is the carbon emission rate (g C/kWh)? d) What is the $CO_2$ emission rate (g C/kWh)? e) What is the sulfur emission rate (g S/kWh)? f) What is the min flow of cooling water per 1kWh if its temperature is allowed to increase only by 8 deg C (specific heat for water is 4.184 kJ/(kg * 1degC))?

          A coal-fired power plant with a heat rate of 7000 Btu/kWh burns coal with an energy content of
16,000 kJ/kg. About 15% of thermal losses go up the stack and 85 % are taken away by cooling
water. The coal content includes 70-percent carbon and 2-percent sulfur.
a) What is the efficiency of the plant?
b) How much coal must be burned per kWh delivered?
c) What is the carbon emission rate (g C/kWh)?
d) What is the $CO_2$ emission rate (g C/kWh)?
e) What is the sulfur emission rate (g S/kWh)?
f) What is the min flow of cooling water per 1kWh if its temperature is allowed to increase only by 8
deg C (specific heat for water is 4.184 kJ/(kg * 1degC))?

A coal-fired power plant with a heat rate of 7000 Btu/kWh burns coal with an energy content of
16,000 kJ/kg. About 15% of thermal losses go up the stack and 85 % are taken away by cooling
water. The coal content includes 70-percent carbon and 2-percent sulfur.
a) What is the efficiency of the plant?
b) How much coal must be burned per kWh delivered?
c) What is the carbon emission rate (g C/kWh)?
d) What is the CO2 emission rate (g C/kWh)?
e) What is the sulfur emission rate (g S/kWh)?
f) What is the min flow of cooling water per 1kWh if its temperature is allowed to increase only by 8
deg C (specific heat for water is 4.184 kJ/(kg * 1degC))?

Added by Kelly M.

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