Calculation of Carbon footprints

Augest 2012

Calculation of Carbon footprint:-

Following methodology helps you to calculate your carbon footprint resulting from the use of Electricity, Petrol, Diesel and LPG.

 Step 1- Data collection;

1. Electricity: Collect data on your annual electricity bills. One can find number of  units consumed in establishment from the monthly electricity bills issues by State Electricity Board/ Distribution/Collection companies.
2. Petrol/Diesel:  Add number of liters of petrol/diesel you used in DG set in a year.
3. LPG: Generally one LPG cylinder has around 14 kg of liquefied petroleum gas. Multiply number of cylinders used in a year by 14 and add the resulted value in the calculation.    

Step 2 – Calculation Methodology;

1. Electricity : Input value (in KWh/Yr) X 0.00085 (Emission Factor) =  Output value in (Kg of CO₂)
2. Petrol: Input Value(In Litres/Yr) X 2.296 (Emission Factor) =  Output value in (Kg of CO₂)
3. Diesel: Input Value(In Litres/Yr) X 2.653 (Emission Factor) =  Output value in (Kg of CO₂)
4. LPG: Input Value(In Kg/Yr) X 2.983 (Emission Factor) =  Output value in (Kg of CO₂)
5. Your Carbon Footprint :  Add (1+2+3+4) = Output value in (Kg of CO₂)

Divide final value (no 5) with 1000 so that you get total carbon footprint in ton of CO_2.

Final Carbon footprint should be in tons of CO₂ (tCO_2.).

Know more about the source of emission factors;

• Electricity = 0.00085 kg CO₂ per KWh, Source: CO₂ emission factor database, version 06, CEA (Government of India), http://www.cea.nic.in/reports/planning/cdm_co2/cdm_co2.htm 
• Motor gasoline/ Petrol = 2.296 kg CO₂ per liter, Source: Emission factors are taken from the file “Emission factors from across the sector -tool”,  extracted from http://www.ghgprotocol.org/calculation-tools/alltools
• Diesel= 2.653 kg CO₂ per litre, Source: Emission factors are taken from the file “Emission factors from across the sector -tool”,  extracted from http://www.ghgprotocol.org/calculation-tools/alltools 
• Liquefied petroleum gas (LPG) = 2.983 kg CO₂ per kilogram, Source: Emission factors are taken from the file “Emission factors from across the sector -tool” extracted from http://www.ghgprotocol.org/calculation-tools/alltools

Carbon footprint calculation For Year : (Telecom application )

= Electricity use + Diesel use

Electrical  use

= Emission factor X  Electricity consumption /Year

= 0.00085  X  ( Average MD  X  Load factor  X  365  X  Average EB Hour  per day )

  Note -- 

Average MD  is  average  of  actual MD recorded in year.

Load factor  will vary  As 50% load of  telephone exchange load is air conditioning load which is depend on ambient temperatures during a day.

It observed  that 

BTS Indoor                          0.85                     AC without FCU   4.8 KW

BTS Indoor                          0.7                       AC with FCU        4.8 KW

BTS Outdoor                       1                           Without AC          2.4 KW

For Telephone Exchange    less than  0.65

Administrative buildings     0.7

Average EB Hour is Average Electricity Board supply available in one day (24hour).

Diesel use

= Emission factor X  Diesel Consumption /Year

= 2.653 X  ( Diesel Consumption in ltr   X  365  X  Engine Run Hour per day )

Diesel Consumption = SFC  X  bhp   /  0.83 X 1000   Liter

SFC will vary depending upon loading of DG set For Full load  167 gms/hp-hr approx.

As per Recommendations

on Approach towards Green Telecommunications

April 12, 2011 

by   TRAI  ( Available on TRAI website )

Refer page 28

If the consumption of power of the Network element, in KW (including Air

Conditioning etc) is P , the Grid power is for ‘x’ hrs , the power from ‘z’

KVA DG is for ‘y’ hrs and the efficiency of the generator is ‘η’ then

C = 0.365 [0.84Px + (0.528 yz /η) ] in Tonnes

Similarly carbon footprints for each of the network elements are to be

calculated. The detailed calculation of footprints of various network

elements is at Annexure –I

page no 30

sample calculation for estimation carbon footprint

2.24 Calculation of carbon footprints towards the conclusion of the peak

season – of winter and summer – may be desirable. Hence the telecom

service providers can declare their Carbon footprints twice in a year.

2.25 All service providers should declare to TRAI, the carbon footprint of

their network operations in the format provided in Annexure -II.

This declaration should be undertaken after adopting the formulae

and procedures mentioned under para 2.20 and at Annexure -I. The

Declaration of the carbon footprints should be done twice in a year

i.e. half yearly report for the period ending September to be

submitted by 15th of November and the succeeding half yearly report

for the period ending March to be submitted by 15th of May each

year.

2.25 All service providers should declare to TRAI, the carbon footprint of

their network operations in the format provided in Annexure -II.

This declaration should be undertaken after adopting the formulae

and procedures mentioned under para 2.20 and at Annexure -I. The

Declaration of the carbon footprints should be done twice in a year

i.e. half yearly report for the period ending September to be

submitted by 15th of November and the succeeding half yearly report

for the period ending March to be submitted by 15th of May each year.

Certain assumptions has been for calculating  carbon footprint for Diesel use.

Also efficiency in case of DG set  is taken as 1 in Annx –I.