By Vanda Villanyi
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Extra resources for Air Pollution
Producing this energy often involves burning fossil fuels. As a result, any light bulb produced or scrapped may produce GHG emissions. To simplify the analysis and draw from existing literature, GHG intensities used to fabricate and dispose of ILBs and CFLBs are taken from Gydesan and Maimann (1991). Although light bulbs come from different suppliers and often manufactured halfway across the globe, it is assumed for simplicity that the electricity supply mix used in their paper is common for all light bulbs used in Canada.
E. Rvalues). To estimate building envelope heat loss, HDD and CDD are combined with the building envelope thermal resistance and surface area by the following relationship (in kWh): = = μ ¶ (5) where n = total number of different surface areas; A = surface area i of the building envelope area (m2); R = building envelope surface area i thermal resistance (m2 ·K)/W; and HDD = heating degree-days (K·day). A light bulb emits all of the energy it consumes as heat or light. While the primary function of a light bulb is to provide a source of light for the resident, all of this energy supplements the space heating energy required to maintain a constant temperature within the household.
However, understanding the electricity export/import situation in different provinces is complicated. Many permutations involving “what ifs” are generated when including electricity exporting/importing from adjacent provinces/states. For example, one argument involves the potential export of electricity from Alberta to British Columbia if the existing demand from BC is higher than the province’s generating capability. In such a case, using ILBs will cause greater GHG emissions in BC because it may have to import electricity from nearby Alberta, which is generated exclusively by fossil fuels with a high GHG intensity.