High Performance Buildings and Products

The China Energy Group has worked closely with multiple institutions in China to help strengthen China's mandatory efficiency standards, voluntary energy efficiency endorsement label, and mandatory energy information label for appliances and equipment since 1996. The Group's early work focused on providing technical assistance in the development of both standards and voluntary labeling criteria through the introduction and trainings on international techno-economic analytical tools and best practices. Within the last decade, as China's market for appliances and equipment has grown rapidly with urbanization and economic development, its efficiency standards and labeling programs have expanded in scope to include a mandatory energy information label and in scale to cover many more products. As of 2012, China had mandatory energy efficiency standards for 46 products and mandatory energy information labels for 25 products. As China's own technical competence has grown, LBNL's assistance has extended to areas such as enforcement testing, laboratory round-robin testing, strengthening the framework for standards and labeling development, and policy impact assessments.

The China Energy Group has also had a long-standing program to assist China in developing building energy codes. Building codes in China are developed by Code Compilation Committees with increasing industry involvement. They undergo public review and approval, before adoption by China's Ministry of Housing and Urban and Rural Development. Our work with China has involved training in the use of DOE-2 and other building energy simulation software as well as assistance in the drafting and implementation of China's building energy standards. The first residential code was for the Heating Zone in 1996. We participated in the development of residential energy standards for the Hot Summer Cold Winter region (2001) and the Hot Summer Warm Winter region (2004). We have also supported pilot efforts in Shanghai and four cities in South China to implement building energy codes. More recently we worked with China to develop a pilot windows rating and labeling program, drawn from the experience of the U.S. National Fenestration Rating Council. The pilot location was the southern city of Guangzhou. To support commercial building retrofits, a software tool has been developed for quick retrofit savings and cost-effectiveness analysis. The China Energy Group also works on distributed building renewable energy applications and helps China develop its goals for net zero energy (NZE) buildings in the future.

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Commercial Building Analysis Tool for Energy-Efficient Retrofits

The Commercial Building Analysis Tool for Energy-Efficiency Retrofit (COMBAT) is created to facilitate policy makers, facility managers, and building retrofit practitioners to estimate commercial (public) buildings retrofit energy saving, cost and payback period. Common commercial building models area created, and the retrofit measures and their effects are pre-computed by EnergyPlus by taking different building types and measures interactions into account.