Engineering B.E. (Electrical Engineering) Sem 7 December 2019 2019 Energy Audilt And Management EAM ELECChoice Base Question Paper - Mumbai University | munotes

Questions asked in this paper

1. Q1 Attempt any FOUR questions
   • a) Give any TWO examples of energy conservation and energy efficiency each. 05
   • b) Define 1) Energy management 2) Energy audit, as per energy conservation act. 05
   • c) List any FIVE ENCON (ENergy CONservation) opportunities possible
   • d) List any FIVE thermal systems that require energy management practices on 05
   • e) Why it is necessary to conduct on site performance evaluation in energy 05
2. Q2 a) Distinguish between ‘preliminary energy audit’ and ‘detailed energy audit’. 10 marks
   • b) What are advantages of NPV method over Simple Payback Period method? 10 Calculate net present value (NPV) for an investment towards a LED Lamp having life of 2 years. The discount rate is 10% per year. The cost of lamp is 0400/_. Due to investment, annual savings in first year and second year is
3. Q3 What are the benefits of Power Factor (PF) improvement? During June-2019, the plant has recorded a maximum demand of 600 kVA and average PF is observed to be 0.82 lag, the minimum average PF to be maintained is 0.92 lag as per the independent utility supplier and every one % dip in PF attracts a penalty of Rs 10,000/in each month. Calculate new kVA and the improvement in PF for July-2019 by installing 100 kVAr capacitors How an “energy efficient motor” is different from a “standard motor” in 10 construction aspects? What are the advantages of energy efficient motor on 10 marks
4. Q4 Why dry saturated steam is preferred for heating applications? Name any FIVE characteristics of steam which makes it most popular and useful to industries? 10 marks
   • b) List any TEN ENCON (ENergy CONservation) opportunities possible in 10
5. Q5 a) decided to replace 400 W lamp with 250 W lamp, 250 W lamp — with 150 W lamp and 125 W lamp with 70 W lamps for same light output for 4500 hours of annual operation and consider Rs. 4.5 as per unit cost. Calculate energy savings, cost savings and simple payback period due to investment 10 marks
   • b) The specifications of cooling water pump connected to boiler, are as follows: 10 As per the boiler manufacturer, required quality is 12.5 lit/sec at 3.0 kg/cm’ What type of energy conservation measure can be proposed and estimate the reduction in power consumption? Assume operating efficiency of pump as 65% and motor efficiency as 90%
6. Q6 a) What do you mean by ECBC? Enlist any FIVE energy saving measures possible in any commercial building 10 marks
   • b) What is LEED rating of a building? Discuss how any traditional building is 10 converted into green building?

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