Cc H192085 Pages: 2

Reg No.: Name:
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
EIGHTH SEMESTER B.TECH DEGREE EXAMINATION(S), OCTOBER 2019

Course Code: EE474
Course Name: ENERGY MANAGEMENT AND AUDITING

Max. Marks: 100 Duration: 3 Hours
PARTA
Answer all questions, each carries 5 marks. Marks
1 Explain the types of industrial load. Draw the torque and power versus speed (5)

characteristics of each type of loads.

2 Explain the energy management opportunities in motors (5)

3 What are the two sources of feed water in a boiler system? What is the need for (5)
feed water treatment?

4 What is meant by waste heat recovery? What are the direct and indirect benefits (5)
of waste heat recovery?

5 Define the term cogeneration. Explain how cogeneration is advantageous over (5)
conventional power plant

6 Define gas turbine cogeneration system with figure. (5)

7 What is meant by simple payback period? Calculate simple payback period fora (5)
boiler that cost Rs.75.00 lakhs to purchase and Rs.5 lakhs per year on an average
to operate and maintain and is expected to annually save Rs.30 lakhs?

8 Calculate the net present value over a period of 3 years for a project with ൧ (5)
initial investment of Rs 50,000 and fuel cost savings of Rs 30,000 in each year.

The discount rate is 16%.
PART छ
Answer any two full questions, each carries 10 marks.

9 A paper manufacturing company has a contract demand of 5000 kVA with the (10)
power supply company. The average maximum demand of the plant is 3850
kVA/month at a power factor of 0.95. The maximum demand is billed at the rate
of Rs.500/kVA/month. The minimum billable maximum demand is 75% of the
contract demand. An incentive of 0.5% reduction in energy charges component
of electricity bill is provided for every 0.01 increase in power factor over and
above 0.95. The average energy charge component of the electricity bill per

month for the plant is Rs. 20lakhs. The plant decides to increase the power factor

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