AIESEC IIT Kharagpur's initiative to conduct the first ever student run not for credit energy audit of the whole IIT Kharagpur campus.

1. AN AIESEC & ECOZEN SOLUTIONS INITIATIVE
Energy Audit,
IIT Kharagpur
Preliminary Audit Synopsis
2010
UNDER THE GUIDANCE OF P RO F ESS O R N. K . KI S HO RE & D R. P BAJ PA I

2. Introduction
The energy consumption facts for IIT Kharagpur, including the Institute campus and the off-campus pumping stations at
Anicut and Balrampur are:
 Gross Annual Energy Consumption: 1,38,000 GJ (95,000 GJ in electricity + 43,000 GJ in fossil fuels)
 Total Annual Electricity Consumption: 2,64,28,079 kWh (Mar ’09 – Feb ’10)
 Approximate per capita consumption of electricity: 2402 kWh/year
 Total Annual Electricity Bill: INR 11,18,20,656
 Gross Annual Carbon footprint in equivalent tons of CO 2 : 25,000 tons
Energy Balance of IIT Kharagpur
IIT Kharagpur Campus + Pumping Stations
Fossil
Total Annual Electricity Consumption
Fuels
95 ,000 GJ/yr [2,64,28,079 kWh/yr]
[43 TJ]
Lab
Air
Pumps Illumination Computers HVAC apparatus
Circulation
2.5% 25.65% 9.37% 26% and machines
4.48%
35%
Fi gure 1: Energy Balance of IIT Kharagpur
The usage of electricity in IIT Kharagpur Campus is distributed as given below:
HVAC
Academic Illumination
26.01%
34.49% Street Lights
Residential
Comertial Computer
19.80% Air Circulation
Others
Others
4.48%
9.37% 5.86%
Figure 1: Area wise distribution Figure 2: Sector wise distribution
2

3. Proposals for reducing energy consumption and energy wastage – [Infrastructural Changes]
What • Replacement of HPSV streetlights by LED lights.
Proposal
• Streetlights currently account for 5.8% of IIT
Why Kharagpur’s electricity bill.
1
• LED’s are up to 52% more efficient and 1.4 times
economical in the long run.
• Phase I: Replacement along Shahid Tarakeshwar
How Road and 2.2 circuit.
• Replacement would lead to approx. 58% savings in
the target patch.
Infrastructural
Cost • Phase I investment: INR 36.8 lacs
• Simple payback period: 53 months
• Modernization of corridor illumination system
What • Install motion sensors, master switches and
timers
Proposal
• Contributes 1.81 % to Kharagpur’s electricity
Why bill, excluding Hostels.
2
• No. of appliances are way more than required.
• Replace tubes with CFL's
How • Motion sensors in low utilization areas
• Master switches in high utilization areas
Infrastructural
• Phase I: INR 92,000 for installation of motion
Cost sensors in 60% of corridors
• INR 50,000 approx. for master switches
o Proposal 1:
3

4. • Renovation of illumination system of Central
What Library
• Motion sensors, reduction in lights
Proposal
• Certain areas in central library have light
Why intensity twice as required
3
• Utilization at many places is extremely low
• Reducing the number of lights
How • Using motion sensors
• Repositioning lights in some places
Infrastructural
• Phase I: INR 50,000 approx. for motion sensors
Cost • INR: 50,000 for rewiring
What • Installation of online energy meters for academic
complex and halls.
Proposal
•The Academic Complex and halls together account
Why for 67% of the institute's total electricity
consumption.
4
•Lack of awareness and energy accounting.
• A web portal to monitor and display energy
How consumption in real time.
• Increase in awareness and consciousness facilitating
wastage reduction
Infrastructural
Cost • Phase I investment: INR 16.4 lacs (approx)
• Payback period: Depends on users' initiatives
o Proposal 1:
4

5. Proposals for reducing energy consumption and energy wastage – [Behavioral Changes]
What •Assigning targets to departments and halls to reduce
consumption
Proposal
1
•Departments are not aware of the wastages
occurring due to poor monitoring
Why •No monitoring implies no awareness amongst
students
•Holding inter-hall contests as an incentive to initiate
Behavioral energy conservation.
How •Similarly having a rating system for departments and
providing incentives accordingly.
What •Launching an aggressive 'Go Green' Campaign.
Proposal
2
•Awareness among the IIT community is the first step
Why to ensure an energy efficient campus.
•IIT KGP should be a part of the world-wide Green
Movement
How •Vigorous campaigning via
posters, presentations, competitions and workshops.
Behavioral
o Proposal 1:
5

6. Heating, Ventilation and Air Conditioning (HVAC) Audit
Distribution of tonnage Centralized Air-Conditioning plants in IIT Kharagpur campus
New
Academic
Complex =
510 (59.2%)
Mechanical Central
Engineering Library/Netaji
Department Auditorium =
= 16 (1.9%) 100 (11.6%)
Total
861 tons
Remote Bio
Sensing (100%) Technology
(ISRO) = 30 Department
(3.5%) = 80 (9.3%)
CSE E & ECE
Department Department
= 45 (5.2%) = 80 (9.3%)
Distribution of Calculated Cooling load of New Academic complex (Total = 510 tons)
Seminar Kalidas SMST
Halls 13% 4% Takshila
3% 65%
Lecture
Halls
15%
6

7. • Installation of stand alone air conditioning system to
What handle the cooling requirements of critical rooms in
the New Academic Complex
Proposal
Why • To turn off the main chiller plant when only cooling
of critical rooms is required
1 How
•Long Distance Piping Packaged Air Conditioners
(LDPPAC): 4 units of 22 tons each
•Verticool Split Air Conditioner (VSAC) : 7 units of 2.5
tons , 11 units of 3.5 tons and 7 units of 4.5 tons
Infrastructural •LDPPC: Cost- INR. 26.40 lacs , Payback period- 8.5
Cost months
•VSAC: Cost- INR. 19.10 lacs, Payback period- 5.7
months
•Usage of extra 510 tons available in the chiller plant
What of the New Academic Complex as district cooling
plant
Proposal
• Old and inefficient cooling systems in different parts
Why of the campus
•Replacing them by more efficient chiller plant of
2
Ramanujan Complex
•Installation of underground insulated pipes along
How with pumps to supply chilled water to other small
plants of the campus
Infrastructural
Cost •Cost of installation:INR. 10 lacs
•Payback period: 2.4 years
o Proposal 1:
7

8. • To reduce inflitration
Proposal What • To set inside temperature at 25 degree
celcius
3
• To reduce extra cooling load of
Why conditioned space
• Creating awareness among people
Behavioral
How • Using spring loaded door instead of
sliding door.
Fossil Fuels Audit
The end usage of fossil fuels in IIT Kharagpur Campus is given below:
GJ/month Tons CO2/month
Static Sources 1708.8 126.4
Mobile Sources 2612.2 60.5
Figure 1: Energy Consumption among static and mobile sources
8

9. Motorcycle
59%
Auto
Rickshaws
City Car 1%
17%
Taxi
6%
Heavyweigh
t Vehicles
LPG KEROSENE CHARCOAL DIESEL 17%
Figure 2: Energy Consumption among static sources Figure 3: Energy Consumption among mobile sources
1200 1158
1000
800
Energy GJ/month
Hall of Residence
Restaurants
600
Techmarket
Main Complex
400
208
200 130
96
58 39
12 8
0
LPG KEROSENE CHARCOAL DIESEL
Figure 4: Distribution of Energy Consumption
9

10. Proposals for reducing energy consumption and energy wastage – [Infrastructural Changes]
What • Building Biogas plants to treat the food waste from
mess kitchens
Proposal
Why • The biogas generated can be used as a substitute for
LPG
1 How • Build two different Biogas Plants capabable of
treating 650 kg/day of food waste each
Infrastructural
Cost • Phase I investment: INR 3.25 lacs
• Simple payback period: 1 year
What •Installation of Solar cooker for boiling water in the
mess kitchens
Proposal
• Solar cookers provide an efficient and grean way to
Why boil water
•LPG currently used for boiling water can be saved
2
using this renewable energy source
How • Installing a Scheffler type solar cooker and doing
the civil work involved
Infrastructural
Cost •Phase I investment: INR 55,000
•Simple payback period: 3 years
Proposal 1:
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