Calculating Efficiency of a Coal Fired Plant - 700 MW Electrical Power

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The coal-fired plant generates 700 MW of electrical power using 5.8 million kg of coal daily, with a heat combustion value of 33 million J/kg. The total energy produced by the plant daily is 60 trillion J. The actual efficiency of the plant can be calculated by comparing the useful electrical output to the energy input from coal. The ideal efficiency is determined by the maximum theoretical output based on the temperatures of the steam and exhaust water. Calculations reveal the actual and ideal efficiencies, highlighting the performance of the coal-fired plant.
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A coal fired plant generates 700 MW of electrical power. The plant uses 5.8 * 10^6 kg of coal each day. The heat combustion of cal is 3.3 * 10^7 J/kg. The steam that drives the turbines is at a temperature of 320 C, and the exhaust water is at 45 C. Note: 700 MW= 7.0 * 10^8 J/s = 6.0 * 10^13 J/day.

What is the actual efficiency of the plant for generating electrical power?
What is the ideal efficiency of the plant for generating electrical power?
 
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