Managing Consultant
Mengyao Yuan

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Mengyao Yuan

Mengyao Yuan

Dr. Mengyao Yuan joined E3 in 2019. Her work at E3 focuses on long-term resource planning and emerging energy technologies for achieving deep decarbonization. She has led power sector modeling to evaluate the benefits of regional transmission expansion, developed tools to assess economy-wide opportunities for hydrogen, and contributed to enhancing E3’s modeling capabilities to integrate emerging technologies.

Prior to E3, Mengyao conducted research on near-zero-emission energy systems and membrane-based carbon capture from power generation. Her research has been published in Applied Energy, the International Journal of Greenhouse Gas Control, and Environmental Science & Technology.

Working in the energy and climate space allows Mengyao the opportunity to solve complex, interdisciplinary problems for the purpose of achieving broad social impact. She was drawn to E3 by the combination of its people, its impact, and its rigorous, evidence-based approach to client projects.

When she is not obsessed with energy models, Mengyao loves to nerd out on languages and experience different cultures. She has lived in Hong Kong, Bordeaux, Hsinchu, and Reykjavík, and eagerly awaits her next adventure (when the world reopens).

Education: PhD, energy resources engineering, Stanford University; MS, environmental engineering and science, Stanford University; BEng, chemical engineering, with a minor in humanities, The Hong Kong University of Science and Technology


Integrated Resource Plan | California Public Utilities Commission, 2021

E3 has provided comprehensive technical and advisory support to the Energy Division of the California Public Utilities Commission (CPUC) in its administration of the state’s IRP program, mandated by the passage of SB 350 in 2016.  E3 worked with CPUC staff to develop the structure of the IRP program including a three-year modeling cycle in which Staff prepares a system-wide plan that informs the California Independent System Operator (CAISO)’s annual Transmission Planning Process (TPP) and informs Load-Serving Entities integrated resource plans in alternate years.

E3 has helped the CPUC design an optimal “Preferred System Plan” for the combined utilities that incorporates the resource procurement plans of the LSEs and complies with the state’s clean energy policy requirements. In the 2020-2021 cycle, the policy requirements considered include a 60% RPS by 2030 and SB 100 by 2045, and a statewide greenhouse gas emissions target of 38 million metric tons (MMT) by 2030, while capturing the operational and reliability challenges encountered at high penetrations of variable renewable generation. E3 also supported the Energy Division’s development of a mid-term reliability order requiring the procurement of 11.5 GW of effective capacity by 2026. As part of this process, E3 evaluated dozens of scenarios reflecting alternative assumptions about load forecasts and electrification, resource costs, the availability of offshore wind and out-of-state wind, the ability of end-use loads to operate flexibly, and a variety of other input parameters.