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
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.