2010 GHG Emissions, Water Consumption and Fuel Efficiency

Transcription

1 2010 GHG Emissions, Water Consumption and Fuel Efficiency Hudson s Bay Company March 2011 Submitted by: Shannon Turnbull Manager, Sustainability Solutions Energy Advantage Inc N. Service Road, Suite 501 Burlington, ON, L7L 6C7 (905) ext. 299

2 Greenhouse Gas Emissions Table 1 shows Hudson Bay Company s (Hbc s) greenhouse gas (GHG) emissions for the years 2000 to For details of the emission factors used to calculate GHG emissions please see Appendix A. Hbc s emissions have been reported as direct (Scope 1), energy indirect (Scope 2) and biogenic carbon dixoide in accordance with the GHG Protocol and ISO Direct emissions arise from sources that are owned or controlled by Hbc, such as fuel burning equipment in their stores or their owned trucking fleet. Energy indirect emissions are the emissions associated with power that Hbc has purchased and consumed, such as electricity, steam and chilled water. Biogenic carbon dioxide is discussed below. Hbc has made great strides in reducing GHG emissions. Total emissions and emissions intensity (the amount of emissions relative to the square footage of stores) have been reduced by 29.6% and 29.3% respectively. Hbc has also offset GHG emissions by using biodiesel in some of their trucks. In 2010 emissions were offset by 184 tonnes of carbon dioxide equivalent by using 20% biodiesel in 18 of their trucks, and since 2005 they have offset 1,172 tco2e. While biodiesel does emit carbon dioxide, it is considered biogenic carbon dioxide and does not contribute to Hbc s GHG inventory. Biogenic carbon dioxide is listed separately in Table 2. A portion of the total emissions for 2010, 16.5%, are based on estimated data. Data gaps included energy consumption data for the end of the year that was not yet available at the time this inventory was prepared, and utility accounts that are paid directly by landlords for which no consumption data is available. Data is estimated using several methods. Small data gaps are estimated using interpolation or extrapolation of existing data. Larger data gaps are estimated using previous annual data; a single year, two year average or three year average is used depending on how much previous data is available. If no historical data is available the consumption is estimated using the average annual consumption intensity, based on store format type and square footage. and Fuel Efficiency Page 2

3 Table 1. Greenhouse Gas Emissions Baseline % Change from Baseline Direct (Scope 1) 95,425 83,335 86,205 89,512 88,722 88,675 83,150 88,568 84,071 85,026 76,459 Natural Gas 67,518 56,777 59,030 61,545 56,412 54,473 51,284 56,267 58,271 59,406 51, % Oil % Propane 2,147 2,022 1,751 1,498 1,643 1,607 1,251 1,628 1,341 1,473 1, % Transportation - Truck Fleet 24,827 23,734 24,632 25,795 30,125 32,006 30,124 30,266 23,975 23,482 22, % Energy Indirect 258, , , , , , , , , , ,326 (Scope 2) Electricity 256, , , , , , , , , , , % Steam 1,708 1,708 1,737 1,930 1,860 1,752 1,503 1,504 1,843 4,077 3, % Chilled water Total 353, , , , , , , , , , , % Intensity (tco2e/1000 sq.ft.) tco2e tonnes carbon dioxide equivalent % Table 2. Biogenic Carbon Dioxide from use of Biodiesel Total Biogenic Carbon Dioxide (tonnes) ,172 1 Greenhouse gas emission totals differ from previous years due to changes to data collection and emission calculation. Energy consumption for each source was recalculated for the last two years to eliminate estimated data where possible and to fill in data gaps. and Fuel Efficiency Page 3

4 Figure 1. Hbc GHG Emissions Year over Year The graph above shows Hbc s GHG emissions year over year. The dominant emission sources are electricity, natural gas and transportation. and Fuel Efficiency Page 4

5 Water Table 3 shows Hbc s water consumption for 2003 to Water use has been reduced by 15.3% in facilities where either water use is metered or water use is estimated based on landlord billings. Table 3. Water Consumption 2 Water Consumption (m3) Reduction over Baseline Intensity (m3/1000 sq.ft.) ,172,175 1,992,248 2,012,425 2,088,372 1,987,485 1,913,404 1,880,980 1,839, % 7.4% 3.9% 8.5% 11.9% 13.4% 15.3% Fleet Fuel Efficiency Table 4 demonstrates Hbc s fleet fuel efficiency since Table 4. Fleet Fuel Efficiency Km/litre Water consumption is tracked in approximately 75% of stores. Consumption totals have been recalculated to eliminate estimated data where possible. The 2010 consumption total contains approximately 28% estimated data. Consumption totals for earlier years contain 13% or less estimated data. and Fuel Efficiency Page 5

6 Appendix A Emission Factors Electricity Environment Canada. Greenhouse Gas Division, National Inventory Report Part 3: Greenhouse Gas Sources and Sinks in Canada. (Ottawa: Environment Canada, 2010.), 47. Emission Factor (tco2e/kwh) Prov AB BC MB NB NF NT NS NU ON PE QC SK YT Canada Prov AB BC MB NU NB NF NT NS ON PE QC SK YT Canada Natural Gas Sources: 1. Environment Canada. Greenhouse Gas Division, National Inventory Report Part 2: Greenhouse Gas Sources and Sinks in Canada. (Ottawa: Environment Canada, 2010.), Environment Canada. Greenhouse Gas Division, National Inventory Report : Greenhouse Gas Sources and Sinks in Canada. (Ottawa: Environment Canada, 2008.), 589. and Fuel Efficiency Page 6

7 Emission Source Factor Prov (tco2e/m3) AB BC MB NB NF NT NS NU ON PE QC SK YT Canada Fuel Oil Environment Canada. Greenhouse Gas Division, National Inventory Report : Greenhouse Gas Sources and Sinks in Canada Part 2. (Ottawa: Environment Canada, 2010.), tco2e/l Steam Formula: ((lbs steam x kg/lbs x GJ/kg x m3/gj)/ 0.75 efficiency) x ng emission factor tco2e/m GJ/kg, m3/gj Office of Energy Efficiency, NRCan, Gigajoule and Energy Intensity calculator, accessed January 28, typical boiler efficiency (conservative) Emission Factor Prov (tco2e/lb) AB BC MB NU NB NF NT and Fuel Efficiency Page 7

8 NS ON PE QC SK YT Canada Propane Environment Canada. Greenhouse Gas Division, National Inventory Report : Greenhouse Gas Sources and Sinks in Canada Part 2. (Ottawa: Environment Canada, 2010.), tco2e/l Chilled Water - Ontario deep lake water cooling Formula : 0.12 kw/ton x electricity emission factor tco2e/kwh 0.12 kw/ton estimate of on-peak electrical demand prepared for BOMA CDM application by Energy Profiles Limited, April In the absence of a definitive study of the ratio of total annual electrical consumption associated with Deep Lake Water Cooling to total cooling output in ton-hours, this is a reasonable and conservative estimate. Year Emission Factor (tco2e/ton-hr) Diesel Environment Canada. Greenhouse Gas Division, National Inventory Report : Greenhouse Gas Sources and Sinks in Canada Part 2. (Ottawa: Environment Canada, 2010.), 193. HDDV Advance Control - heavy duty vehicles model year 1996 and later tco2e/litre and Fuel Efficiency Page 8

9 Global Warming Potentials (relative to carbon dioxide) Environment Canada. Greenhouse Gas Division, National Inventory Report : Greenhouse Gas Sources and Sinks in Canada Part 1. (Ottawa: Environment Canada, 2010.), 21. CO2 1 CH4 21 N2O 310 and Fuel Efficiency Page 9