1. Key Laboratory for Thermal Science and Power Engineering of Ministry of EducationDepartment of Energy and Power EngineeringTsinghua UniversityBeijing100084P. R. China
2. Tsinghua University‐University of Waterloo Joint Research Center for Micro/Nano Energy & Environment TechnologyTsinghua UniversityBeijing100084P. R. China
3. Department of Mechanical & Mechatronics EngineeringUniversity of WaterlooWaterlooONCanadaN2L 3G1