A three phase induction 75 kW motor operates at 55 kW. The measured voltage is 415V and Current 80 amp. Calculate the power factor of the motor.

Explain in brief Energy efficiency versus Energy conservation. Write step wise procedure to calculate Boiler efficiency.

Classify the energy conservation measures applicable in steel industry.

A co-generation plant installation is expected to reduce a company’s annual energy bill by Rs.24 lakhs. If the capital cost of the new cogeneration installation is Rs.90 lakhs and the annual maintenance and operating costs are Rs. 6 lakhs, what will be the expected payback period for the project?

Explain the working principle of thermocouples.

Explain the utility and features of the energy audit equipment used for the measurement of electrical parameters.

Explain the methods of Energy Audit with suitable examples.

Describe the energy conservation opportunities for residential and commercial application.

(ii). Green House Effect

(i). Solar active and solar passive buildings

Explain Solar Drying System with neat schematic diagram. Also write its usefulness.

Classify the different categories of solar building system and also explain main features of three main type of building.

Explain the Trombe wall in detail. Also explain effect of window orientation.

Explain floating drum biogas digester with neat diagram. Also write its advantages and disadvantage

Explain schematic flow sheet for high rate farm scale digester.

Draw and explain current –voltage characteristics of a solar cell. What is packing factor?

Explain working of Solar Lantern with proper sketch.

Explain the principles and working of solar cooker. Also highlight its features over conventional cooker.

What is Solar Constant? Also write the advantages of selective surface.

Tidal energy