Question
Download Solution PDFIn case of thermal efficiency, by using which of the following relations can 1 KWh of electrical energy be converted into joules?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThermal Efficiency
The ratio of heat equivalent of mechanical energy transmitted to the turbine shaft to the heat of combustion of coal is known as the thermal efficiency of the steam power station.
The efficiency of the boiler of the steam power plant is the thermal efficiency.
1 kWh = 3.6 × 106 joules
1 kWh = 36 × 105 joules
Overall Efficiency
Overall efficiency = Thermal efficiency × Electrical efficiency
Overall efficiency = Boiler efficiency × (Turbine efficiency × Generator efficiency)
The thermal efficiency of a modern steam power station is about 30%.
Last updated on Jun 16, 2025
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