1. Department of Refrigeration and Cryogenics Engineering, College of Environmental and Energy EngineeringBeijing University of Technology Chaoyang Beijing China
2. China Household Electric Appliance Research Institute Xicheng Beijing China
3. School of Economics and ManagementBeijing University of Technology Chaoyang Beijing China
4. Key Laboratory of Urban Security and Disaster Engineering of Ministry of EducationBeijing University of Technology Chaoyang Beijing China