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Dr. Dewei Yang

Institute of Urban Environment, Chinese Academy of Sciences, China


Talk Title
Modelling sectoral policy alternatives for urban energy-carbon reduction actions

Talk Abstract

The intensive energy consumption in urban sectors is aggravating global warming, which triggers an in-depth thinking about energy-carbon nexus and low-carbon city actions. Hence, China has launched a pilot low-carbon city program to explore low-carbon pathways since 2010. This study employed a Long-range Energy Alternatives Planning System model (LEAP) to simulate six energy sectors-related GHG emissions in a pilot low-carbon Ningbo city, China. The LEAP-Ningbo model comprises three basic modules, i.e. energy supply, energy transformation and end-use energy demand in six urban sectors (i.e., household, service, agriculture, transport, industry, and transformation sectors), and resulting environmental impacts (CO2 equivalents). The results identified by the business as usual (BAU) scenario indicate that total energy consumption is expected to reach 449.72 Mtce and results in emissions of 651.83 Mt CO2e by 2050. In contrast, more aggressive policies and strategies involved in the integrated scenario (INT), which combines the energy structure optimization (ESO) scenario with the policy-oriented energy saving (PES) scenario, can lower energy demand by 14% and CO2e emissions by 27%. A comparison among global cities and low-carbon plans helps identify the carbon emission level and define the actionable low-carbon policies. The high correlation between sectoral energy use and resulting GHG emissions implies energy-carbon reduction efforts, e.g., low-carbon energy substitution, intensive energy-saving policies, the improvement of energy efficiency, and industrial transformation. Achieving low-carbon city targets requires timeline-restricted actions and backgrounds-based measures in plans. The results of this study shed light on if and how cities can shape energy-carbon reduction trajectories and develop low-carbon pathways in China and beyond.

Short Biography

Dr. De-Wei YANG as an associate professor is working in the Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences. He received the Ph.D. degree from the Graduate University of Chinese Academy of Sciences in 2009. His research is in cross-boundary footprints and socio-ecological system sustainability. Research topics have been focusing on energy flows, energy-carbon nexus, cross-boundary footprints, and adaptation policy and technologies to global climate change. He serves as reviewers in a wide range of international journals and has attended academic conferences in transdisciplinary research community. His research employ modelling and life cycle inventory approaches in striving for a better understanding of urban sector-related energy consumption pattern, timeline energy and carbon reduction strategies, life cycle inventories for urban waste process-based carbon emissions scenarios, trade-offs in techno-economics and environmental substitution effect. He also explores the understanding for emergy language in urban metabolism and resilience transitions in coupled human-environmental systems.

Talk Keywords
GHG emissions; Energy saving; LEAP; Pilot low-carbon city; Scenarios.
Target Audience
Students, Post doctoral, Industry, Doctors and professors
Speaker-intro video

The International Conference on Innovative Applied Energy (IAPE’18)