Understanding the Last 10%: A Detailed Inventory of Scope 1 and 2 Emissions

Tuesday, August 13, 2019
Central Energy Facility

As Stanford works to increasingly reduce its carbon footprint, beyond the 80% reduction target it is on track to reach by 2021 with implementation of the Stanford Solar Generating Station #2, Sustainability and SEM Business Services undertook a comprehensive planning process to quantify the remaining emissions reduction opportunities on campus, and develop a cost analysis and strategy for electrifying the equipment. Through increases in efficiency with the SESI system and an increasingly electricified transportation fleet, the areas of focus still remaining are largely with natural gas powered equipment, which make up "the last 10%" of Scope 1 and 2 campus emissions.

To quantify the emissions reduction opportunities, SSBS conducted a detailed inventory of the remaining equipment. Over the course of five weeks, the team inventoried more than 1,800 appliances and heating equipment, accounting for each component of the natural gas consumption across 190 academic buildings and 260 residential spaces. Detailed analysis then projected the impacts on both electrical loads and natural gas loads to determine the precise costs and benefits of electrification and develop a potential path forward. The primary opportunities lie with considering electric alternatives, such as heat pumps, for natural gas powered heating systems, as well as exploring electrification of appliances in kitchens, laundry rooms, and labs. Some of these opportunities will begin to be piloted in FY20 to further inform the full timeline and impacts of electrification.