Energy Audit for CAHCET

byM.Ganesh Murugan

Guided by Project coordinatorMr. H.Mohd Raffiq Mr. A. Amjad ahmed syed

What is Energy Auditing?

Understanding the energy usage Indicates the way of energy flow

(types, quantity, cost, etc.,)

Energy Auditing……..why?Three E’s

Economy

Environment

Energy

Energy crisis alarmed-1973

Solution – Energy Conservation

Energy audit -proficient tool

Objective Identify the various

energy sources Reduce the energy

wastage Recommend the

conservation methods

Types of Energy Utilized

Electrical energyFuel energyThermal

energy

Pie chart

Wood

Electricity

Diesel

LPG

Petrol

Wood

Electricity

Diesel

LPG

Petrol

Sankey diagram

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

Load profileElectricity consumption-2004

0

5000

10000

15000

20000

25000

30000

35000

units

Electricityconsumption

CONSERVATION METHODS

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/yearPay back period = 26 monthsCost of savings = Rs.72250/year

*approximately calculated

By day light-A/c roomsAllow 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*approximately calculated

Street lights-HPSVReplace 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/yearCost of saving = Rs.8080/year

*approximately calculated

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/yearEconomic analysis: Power will save =1574.05 units/year Cost of saving = Rs.5509/year

*approximately calculated

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

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

Solar lightening-future Entrance focus Garden light Portico light Clock

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

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*approximately calculated

Ceiling fan-A/c rooms Install ceiling fan in

A/c rooms

More than 6% of energy has saved.

Bio gas plantUsed 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 monthsExpand the quantity (future)

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.

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.

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.

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.

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.

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.

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.

Thank You