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 Jul 1, 2025
-> SSC JE Electrical 2025 Notification is released on June 30 for the post of Junior Engineer Electrical, Civil & Mechanical.
-> There are a total 1340 No of vacancies have been announced. Categtory wise vacancy distribution will be announced later.
-> Applicants can fill out the SSC JE application form 2025 for Electrical Engineering from June 30 to July 21.
-> SSC JE EE 2025 paper 1 exam will be conducted from October 27 to 31.
-> Candidates with a degree/diploma in engineering are eligible for this post.
-> The selection process includes Paper I and Paper II online exams, followed by document verification.
-> Prepare for the exam using SSC JE EE Previous Year Papers.