Accurate and rapid building energy demand calculation engine
State of the art
Sizing and determination of the HVAC system in a building, the precise calculation of the energy demand is an essential task. To guarantee that the expected system’s performance is achieved. Sizing is made either using empirical methods based on the equipment’s characteristics, either via acquired energy consumption profiles, or based on detailed building energy simulations to accurately characterize the energy requirements of a building.
The GEOFIT solution
GEOFIT proposes the use of an energy demand calculation engine (EDCE) which is based on energy analysis and thermal load simulations. It can calculate accurately and rapidly (in terms of seconds) the annual energy demand of a given building, based on its architectural characteristics, climatic conditions and operation profiles. The EDCE tool is based on an energy simulator combined with mathematical models that describe the correlations between the buildings´ characteristics and their energy requirements, permitting to accurately calculate the energetic behaviour of a given building under specific operation and climatic conditions. The EDCE presents the same accuracy and precision advantages of the simulation methods, but decreasing significantly the configuration and computational effort that is required for the calculation of the results, which consist of four hourly-based vectors of the energy profiles of heating, cooling, domestic hot water and electricity, for a prediction horizon of 1 year. Furthermore, the structure of the proposed tool permits its integration into BIM platforms (using standard open protocols), allowing the bidirectional transfer of information.
Thus, all the required input variables of the forecasting tool can automatically be obtained by the BIM project, without the need of a manual configuration. Finally, the forecasting tool can be used for the calculation of the necessary energy baselines, required in the International Performance Measurement and Verification Protocol (IPMV), to determine energy savings thanks to energy efficiency actions.
Technology readiness level improvement: From TRL5 to TRL7