German energy conservation regulation - basics and examples

摘要

The German energy conservation regulation "Energieeinsparverordnung (EnEV)" came into effect on February 1st, 2002. New requirements for the planning and performance of the building envelope and the technical systems for heating, hot water supply, and ventilation have been introduced. In addition to an upgrade in the overall standard, EnEV shows the potential of using the underlying calculation procedures as a planning tool that offers new energy saving approaches in buildings. This paper presents a description of the structure and the requirements of the Energy Conservation Regulations. Also, the calculation of heat use, based on the German Standard DIN V 4108-6, derived from the European standard EN 832, and primary energy use, based on DIN V 4701-10, are presented. Calculation examples show the impact of possible compensation measures on thermal insulation systems vs. technical systems, and the influence of single measures on primary energy use. The consequences regarding planning and performance are shown.