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EnerCalC – Simplified energy balancing to DIN V 18599

EnerCalC Version 5: With relatively little input effort, EnerCalC enables the energy performance requirements for a building to be balanced in accordance with DIN V 18599. Press start to being balancing your zero-energy or energy-plus building.

With relatively little input effort, EnerCalC enables the energy performance requirements for a building to be balanced in accordance with DIN V 18599. Press start to being balancing your zero-energy or energy-plus building.

© Bergische Universität Wuppertal, b+tga

Technology summary

Software typeFull version, Freeware, R&D-Tool
Term of projectForschungsprojekt bis 10/2010, 2/2017 Update zu Version 5
Identification codeEnerCalC
Download at

www.enob.info

Terms of useFreely available for research, teaching and all non-commercial applications
Key aspects

Project description

The energy balancing of a non-residential building generally requires extensive zoning of the building and, in relation to this, time consuming determination of the zone-related envelope. With EnerCalC, the building envelope is recorded on the basis of a single-zone model, whereas the energy balancing takes place in the multiple-zone model. For this purpose, in the first method the surface area of the building envelope is divided proportionately across the individual zones (simplified procedure). Particularly for partially air-conditioned buildings, the preciseness of the results can be increased by additionally defining the actual orientations of the zone-related surface areas of the building envelope (extended procedure).

The simplification approach is based on assigning the envelope surface to the individual building zones based on the proportional zone area. In a further stage, it is possible to make a more precise allocation. The preciseness of the results can be increased even further by defining main orientations for individual zones. Additional spreadsheets enable the amount of detail to be increased as required.

In its implementation as a spreadsheet, the energy target values for a building are graphically depicted immediately on entering or changing the data. A reference building to EnEV and a building that is exemplary in terms of its energy use serve as example buildings.

What has been achieved until now?

The EnerCalC Excel tool was created as part of a dissertation written for the Department of Building Physics and Technical Building Services at the University of Wuppertal and was used to develop and validate simplification methods based on the balancing rules provided by DIN V 18599. The tool is based on Excel and uses macros. It runs with the Excel 2007 and 2010 PC versions, whereby the execution of macros must be enabled.

The tool considerably reduces the necessary inputs and provides much more flexibility. This therefore encourages its earlier use during the design and conceptual phases in order to determine the basic energy-related characteristics of the building. It is also suitable for providing a rough, energy-based characterisation of existing buildings if there is a lack of detailed information.

Project partners

EnerCalC was developed as part of a dissertation written by Markus Lichtmeß. This dissertation, which is entitled “Vereinfachungen für die energetische Bewertung von Gebäuden“ (simplifying the energy-oriented assessment of buildings), is available in German as a PDF document.

Next steps

The tool is being continually updated and further developed.

Application-ready product

EnerCalC is freely available for research, teaching and all non-commercial applications. It can be downloaded free of charge from the EnerCalC website, including online tutorials and ordering options.


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News & events
 
  • EnerCalC Version 5: The work with EnerCalC begins on the start page: here you can configure basic options, manage projects and install the latest updates.
  • EnerCalC Version 5: The data can be inputted – here you can see the basic data for the building envelope – comparatively quickly...
  • EnerCalC Version 5: Typical for EnerCalC: The output results are depicted graphically immediately upon entering the data via input fields and spreadsheet calculations. Here the differentiated energy demands are shown graphically.
  • EnerCalC Version 5: Here you can enter detailed, building-related parameters ...
  • EnerCalC Version 5: … and the corresponding results, values and graphical depictions are obtained immediately. Here the differentiated energy demands are shown relative to the reference building according to EnEV.
  • EnerCalC Version 5: The image shows the electricity balance for the building and the photovoltaic system.
  • EnerCalC Version 5: The heating balance for the domestic hot water and solar thermal system
  • Final energy balance according to the use and energy carriers
  • EnerCalC Version 5: Heat losses balanced according to the causes
  • EnerCalC Version 5: Detailed heating balance
  • EnerCalC Version 5: Detailed primary energy balance on a monthly basis
  • EnerCalC Version 5: The schematic depiction of the primary energy performance enables the concept and success of zero-energy and energy-plus buildings to be quickly assessed and compared.
  • EnerCalC Version 5: The annual primary energy balance