Abstract
Since the enforcement of eight-step energy management system (EnMS) in 2010, the electricity and thermal energy in 6,161 designated factories have been conserved through electricity and thermal energy housekeeping, process improvement and machine change measures. As from Nationally Determined Contribution (NDC) target that aims to reduce greenhouse gas (GHG) emissions, energy efficiency has long been regarded as a key pathway for GHG mitigation, but the volume and diversity of efficiency options has resulted in an unclear understanding of their combined impacts. Past national energy conservation evaluations focused only on an annual calendar-based concept, without considering cumulative aspects. The challenge of reducing industrial GHG emissions has led to an increasing need for a more precise methodology that highlights how energy conservation can significantly contribute to achieving the target. This paper aims to track GHG mitigation through energy efficiency measures in the industrial sector to achieve the NDC target. It analyzes and validates the real-world meta-data from all designated factories database from the year 2010 to 2020. By using the cumulative energy savings from 2015, which is the NDC base year, with decay rate and equipment lifetime assumption taken from national labeling demand side management program. From three main conservation types which are housekeeping, process improvement and machine change, we found that the cumulative electricity and thermal energy saving were at 2,541 GWh and 17,933 TJ. While the GHG mitigation was 2.24 Mt CO2 in the year 2020. This figure is far behind the mitigation target in NDC which require about 16.5 Mt CO2. Additionally, policy recommendations have been thoroughly discussed to address this gap.
