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H1087 Pages:

a) Determine the rated efficiency and the loading of the existing motor.

b) Calculate the loading with energy efficient motor

c) Calculate kW saved by replacing the motor with new eff3 motor
Consider motor efficiency to remain constant between 52 —100 % loading.

PART C
Answer any two full questions, each carries 10 marks.
What is meant by boiler blow down? Explain the types of blow down processes

in boiler system?
List any five methods of energy conservation opportunities in a furnace?
List the main components of a vapour compression refrigeration system with
figure?
What are advantages of installing waste heat recovery devices? Explain any two
waste heat recovery devices.
PART D

Answer any two full questions, each carries 10 marks.
Explain in detail the steps involved in detailed energy audit
List any five instruments used for energy audit. What are the parameters that can
be measured using electric power analyser?
Explain any two economic analysis techniques used for financial evaluation of
energy conservation projects?
The cash flow of an energy saving project with a capital investment cost of Rs.
30,000/- is given in the table below. Find the NPV of the project at a discount

rate of 10%. Also find the Internal Rate of Return of the project.

Cash Flow

| 1 | 7000
7000

7000
7000
5 7000

7000

ஓ

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