This document summarizes an energy audit conducted for CAHCET college. The audit identified various energy conservation methods that could be implemented, such as replacing lights with more efficient bulbs, installing insulation and making adjustments to air conditioning usage. It was estimated that these conservation methods could save over 45,000 units of electricity per year, equating to cost savings of over 160,000 rupees annually. This would reduce the college's electricity usage and costs by approximately 16.84% and 12.2% respectively. In conclusion, the energy audit provided recommendations to make the college's energy usage more efficient and achieve significant savings.

2. Energy Audit for CAHCET
by
M.Ganesh Murugan
Guided by Project coordinator
Mr. H.Mohd Raffiq Mr. A. Amjad ahmed syed

3. What is Energy Auditing?
 Understanding the energy usage
 Indicates the way of energy flow
(types, quantity, cost, etc.,)

4. Energy Auditing……..why?
Three E’s
 Economy
 Environment
 Energy

5. Energy crisis alarmed-1973

6. Solution – Energy Conservation
 Energy audit -proficient tool

7. Objective
 Identify the various
energy sources
 Reduce the energy
wastage
 Recommend the
conservation
methods

8. Types of Energy Utilized
Electrical energy
Fuel energy
Thermal energy

9. Pie chart
Wood
Electricity
Diesel
LPG
Petrol
Wood
Electricity
Diesel
LPG
Petrol

10. Sankey diagram
SANKEY DIAGRAM ELETRICAL ENERGY
USAGE(10^11J PER YEAR) BY A COLLEGE

11. Load profile
Electricity consumption-2004
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35000
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Electricity
consumption

12. CONSERVATION METHODS

13. Tube lights
 Power consumption by tube lights
at present(40&36 W) = 61618.19 units/year
 power consumption by 36 W instead of
40 W Tubes = 58047.95 units/year
By using electronic ballast = 40975.22 units/year
Economic Analysis:
Power will save = 20642.97 units/year
Pay back period = 26 months
Cost of savings = Rs.72250/year
*approximately calculated

14. By day light-A/c rooms
Allow the Daylight
 Power consumption by tube lights at present
= 7371.54 units/year
 Power consumption by tube lights by this method
= 3685.77 units/year
Economic analysis:
Power will save =3685.77units/year
Cost of saving = Rs.12900/year

15. Street lights-HPSV
Replace HPMV by HPSV
 Power consumption by HPMV = 5246.88 units/year
 Power consumption by HPSV = 2938.25 units/year
Economic analysis:
Power will save = 2308.63 units/year
Cost of saving = Rs.8080/year
*approximately calculated

16. Street lights
Switch on Even lights after 9 pm
 Power consumption at present(10 no’s) = 5246.88
units/year
 Power consumption by this method (7no’s) = 3672.82
units/year
Economic analysis:
 Power will save =1574.05 units/year
 Cost of saving = Rs.5509/year
*approximately calculated

17. Name board removal (side)
 Power consumption at present = 5047.95 units/year
 Power consumption after removal = 4460.30 units/year
Economic analysis:
 Power will save = 587.65 units/year
 Cost of saving = Rs.2057/year
*approximately calculated

18. Solar lightening
 Power consumption by street lights at present =5246 units/yr
 Power consumption by this method =nil
Economic analysis:
 Power will save >=5246.88 units/yr
 Cost of the project =Rs.160000
 Payback period =9 years
 Cost of saving =Rs.18364/yr
*approximately calculated

19. Solar lightening-future
 Entrance focus
 Garden light
 Portico light
 Clock

20. Insulation-A/c rooms
 Power consumption at present = 42385.5 units/yr
 Power consumption after insulation=39842.37 units/yr
Economic analysis:
 Power will save =2543.13 units/yr
 Cost of saving =Rs.8901/yr
*approximately calculated

21. Compressor checking
 Power consumption-reciprocating compressor
=39235.5 units/year
 Power consumption-rotary compressor
=29893.7 units/year
Economic analysis:
 Power will save =9342 units/year
 Cost of savings =Rs.32697/year

22. Ceiling fan-A/c rooms
 Install ceiling fan in A/c
rooms
 More than 6% of energy
has saved.

23. Bio gas plant
Used to conserve the usage of wood
 Bio gas plant is very effective one for our
hostel. Because it saves money.
 we construct a small bio gas plant.
 It produces gases equal to three LPG
cylinders for a month.
 Savings per year - Rs.11700
 Pay back period - 9 months
Expand the quantity (future)

24. Steam cooker
 This steam cooker is used to prepare food by
steam. By this method the time taken for
prepare the food is reduced.
 Another one is number of LPG cylinders and
wood also reduced due to the steam work.
 This is most preferable for our hostel to
reduce the energy bill.

25. Conservation tips (lights)
 The use of timer switches to switch off lights during
unwanted hours should be considered.
 Replace existing tungsten filament lamps with
compact fluorescent lamps.
 Lamps and luminaries should be cleaned regularly.
Illumination levels fall by 20-30 % due to collection of
dust.
 Lighting should be reduced in non-resident areas.

26. Conservation tips-A/c
 Turn off heating or cooling when not needed.
 Set Thermostats correctly (Human comfort
conditions).
 Consider replacing old HVAC systems with new
energy-efficient systems.
 Microprocessor based control system may be
developed and adopted to optimize energy use.

27. Conservation tips (equipments)
 Make awareness and encourage employees/students
to reduce electrical loads in our college.
 When purchasing equipment, purchase “Energy Star”
products.
 Eliminate unnecessary hot plates, and other similar
appliances in our labs & canteen.
 Otherwise turn off the things and machines when not
in use.

28. Conservation tips (computers)
 LCD monitors consumes less energy
compared to ordinary monitor. So bring LCD
monitors for future use.
 Note that screen savers don’t save the
energy; complex screen savers actually
increase energy use.
 Use the power management features to save
the energy in computer.
 Turnoff computer monitor when not in use
(or) we are away from our desk for more than
5 minutes.

29. Benefit to users
 Saving in Energy of 8 to 25%.
 Identification of all points of energy loss.
 Reduced cost of maintenance.
 Saving of penalties like power factor penalty etc.
 Fewer breakdowns.
 Formulating strategies of energy and fuel saving.

30. Conclusion
*approximately calculated
 Conserve power = 45931.08 Units/year
 Conserve amount =Rs.160758/year
 Percentage of units saved per year in electric
bill =16.84%
 Percentage of amount saved per year in
electric bill =12.2%
 Thus, energy audit will help us to make our
unit more energy-efficient, consequently
saving energy and money.

31. Thank You