Page 25 - ZEB Final Report 2009-2017

Complex Competence & An Energy Saving Tool | 25

Anne Buran Øyen Igor Satori Kristian Stenerud Skeie
Energy Consultant, Senior Scientist, Researcher, SINTEF
Multiconsult SINTEF

PV on Visund: 350 m² of PV-panels on the Visund-roof cover the building’s energy demand in collaboration with a sea water heat pump and
the existing distributing grid for district heating and cooling. The ZEB tool helps determine the optimum composition of energy systems.

An Energy Saving Tool

Choosing the correct energy solution is essential when building a zero emission

building. The ZEB energy system analysis tool for the early design phase meets
this challenge. Multiconsult has tested the tool.

Experience from ZEB pilot projects The tool is post-processing, based on
reveals a need for more knowledge and outputs produced from other building
better tools for analyzing and selecting performance simulations (BPS) tools,
energy systems in the early design phase. such as thermal load, plant temperatures,
Since there is no universally recognized mass flows, and energy exchange between
ZEB definition, it is important to evaluate components.
different metrics, e.g. primary energy As one of the ZEB partners,
and carbon emissions. The ZEB tool Multiconsult has had the opportunity to
provides the design team with feedback, test the new tool. The Excel-based tool is
offering answers to «what if» questions of developed for import from the software Workshops: The design team explores
interest to technical installation experts IDA ICE, which is a simulation tool for different options in the early design phase,
and other participants. indoor climate and energy, developed and the ZEB tool provides feedback on the
Results are mainly presented in by EQUA. Hourly demand and load data combinations of energy systems.
graphic form and provide insights into is sent from IDA ICE into the ZEB-tool,
energy system performance, e.g. load providing the ZEB-balance and cost for use in a workshop-based setting.
duration curve, split between base and top results based on a chosen energy supply Quick guidelines which summarize
heating, temperature and COP diagrams system. the most important information could
for heat pumps, demand profiles for The initial development phase also simplify the process. The tool will
electricity and thermal carriers, ZEB requires quick and easy testing of different be further developed in the FME Zero
balance and mismatch factors, as well as ideas and solutions. Multiconsult would Emission Neighbourhoods in Smart
global cost during the economic lifecycle. like the tool to be even more user-friendly Cities

Further reading: Igor Sartori, Sjur V. Løtveit, Kristian S. Skeie (2017) Guidelines on energy system analysis and cost optimality in early design of
ZEB, ZEB report. Pending April-May 2017.