Calculating Indirect Emission for Business Support Activities by Using Emission Factor Improvement with Carbon Calculator Application

Abstract As a company with a vision to become a global and sustainable energy company, we need to disclose several environmental aspects, one of which is emissions. Scope 1 & 2 emissions can easily be disclosed by the company as the data is within the company. However, for scope 3 emissions, particularly categories 6 & 7, which include business travel and employee commuting, calculation data resides with the employees. Therefore, a tool is needed to standardize the calculation methods for scope 3 categories 6 & 7 and also to accelerate data collection process. Hence, we have decided to develop an application called "Carbon Calculator." The basic design of this application refers to the IPCC Guidelines for National Greenhouse Gas Inventories 2006. In general, greenhouse gas emissions (GHG) are calculated by multiplying activity data with emission factors. Activity data refers to energy consumption data according to the type used, while emission factors are coefficients indicating the amount of emissions per activity. In the technical implementation of emission calculations in the Carbon Calculator application, calculations will be adjusted based on data availability and emission factors. To simplify emission calculations from vehicles, the company processes advanced data on Net Calorific Value (NCV), emission factors, and fuel economy to obtain emission load calculation results from the use of private vehicles. Carbon calculator is a web-based application for GHG inventory that will be used by all workers. PHE Carbon Calculator enhances emissions transparency for indirect emission (Scope 3 Category 6 & 7) and empowers PHE to proactively manage and reduce its environmental footprint and further indicates its commitment to global sustainability leadership. Currently, PHE is focused on familiarizing the use of the carbon calculator and conducting a campaign to disclose scope 3 emissions. At present, nearly all regions have participated in filling out the carbon calculator. IPCC has provided the methodology for calculating GHG, however in this study we improve the emission factor specification to have more specific result in employee commuting and business travel disclosure. Future development of PHE Carbon Calculator will focus on scalability and integration of advanced analytics to further optimize sustainability initiatives.