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What is energy auditing ?
Energy consumption of workplace eg. College,hospital, airport
In depth analysis of Electricity bills
Conservation measures.
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Pattern of demand & consumptionover a period
Contribution of each appliance to theelectricity bill
implementable measures forconservation
Recovery time of investment costs &consolidated savings
INDEX
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Present Scenario at T.M.Dental College
Total Energy Consumption= 63796 KWhPer unit Charge = Rs.4.6Total Bill = Rs 2,96, 844
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Departments & Their EnergyConsumption
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Energy Consumption By EndUse
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Energy Conservation Equipment
1.ACs
Aircosaver: Electronic Circuit adding
intelligence to cooling systems havingintegrated relay to control current drawn Programmable thermostat to adjust
temperature. CO2 Sensors to control air intake by estimating
people in the room Reflective windows to reduce heat absorption
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2. Fans
Fans consume less energy at low speeds
Using Energy Rated Fans. Rating of 2.5-3 saves 20% power from fans itselfImprovising rotor blades design reduces current drawn.
FanFanspeedspeed
VoltageVoltage(volts)(volts)
CurrentCurrent(A)(A)
PowerPower(W)(W)
22 228228 0.20.2 1313
33 226226 0.290.29 2626
44 218218 0.380.38 3838
55 220220 0.460.46 5656
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ParametersParameters Incandescent lampsIncandescent lamps CFLCFL LEDLED
Life span (hours)Life span (hours) 15001500 10,00010,000 60,00060,000
WattsWatts 6060 1414 66
Cost (Rs)Cost (Rs) 2020 150150 11001100
KWh of electricity usedKWh of electricity usedfor 60k hoursfor 60k hours
36003600 840840 360360
Electricity cost @ RsElectricity cost @ Rs
4.634.63
Rs. 16668Rs. 16668 Rs. 3889.20Rs. 3889.20 Rs.1666.80Rs.1666.80
Bulbs needed for 60kBulbs needed for 60k
hrs of usagehrs of usage
4040 66 11
Equivalent 60k hourEquivalent 60k hour
bulb expensebulb expense
Rs. 800Rs. 800 Rs. 900Rs. 900 Rs. 1100Rs. 1100
Total 60k hour lightingTotal 60k hour lighting
spendspend
Rs. 17468Rs. 17468 Rs. 4789.20Rs. 4789.20 Rs. 2766.80Rs. 2766.80
3. LIGHTS
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LAMP v/s LED
CFL and LED are good alternatives for lamp
incandescent lamp and LED in the range of
10,000 hrs -60,000 hrs.CFL and incandescent bulbs comparison
Comparison
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ENERGY MANAGEMENT METHODS
Corridor lighting with reflectors to increase illumination
Maintenance of power factor at 0.95
Common switch to shutdown tubes and fans in a room
Cutting down on peak load using automated circuits and soft wares reducing
peak demand charges
Energy Management Software to monitor and control supply to various
departments
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FINAL VERDICT
Recovery of depreciation costs of AIRCOSAVERSimplemented in 17 ACs is 312 hours. Savings accrue to 1,27, 005 INR after 1800 hours.
Implementation of regulators in 321 fans will be recoveredin 45 days. Savings amount to 51,004 INR. It consumes38W for a speed of 3.
Supported lighting load is 30 KW by 1313 lamps. LED
replacement costs obtained in 3491 hours. Savings accrueto 1, 79, 382. 52 INR after 1800 working hours hereafter.
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Spasiba