The influence from input data provided by the user on calculated energy savings
2014 (English)In: 10th Nordic Symposium on Building Physics, Lund, Sweden,15-19 June, 2014, 2014, 1301-1308 p.Conference paper (Refereed)
It is generally accepted that the most correct decisions are made when the used support system provides the most accurate description of the starting point as possible. That is, in this case, a detailed initial description of a building, planned to be refurbished and evaluated with the building energy simulation software IDA ICE (v 4.5).In order to assess this statement, we have used two different models to predict energy savings due to different planned energy conservation measures (ECMs):
- A basic model based on inputs from currently available standards and as-built drawings.
- A calibrated model based on an analysis of measurements from two months, together with measured air handling unit parameters, hourly electricity usage and indoor temperatures.
The relative prediction differences between the models are investigated as well as compared with the actual outcome in a neighboring building where the analyzed ECMs have been implemented. The result indicates that a calibrated model should be used, in order to accurately determine the post-retrofit energy demand. However, if only investigation of ECMs which aims to decrease a buildings transmission loss is of interest, the findings suggest that BES calibration is of minor importance.
Place, publisher, year, edition, pages
2014. 1301-1308 p.
Simulation, energy savings, retrofit, model calibration, regression
Engineering and Technology
IdentifiersURN: urn:nbn:se:umu:diva-92355ISBN: 978-91-88722-53-9OAI: oai:DiVA.org:umu-92355DiVA: diva2:740842
10th Nordic Symposium on Building Physics, Lund, Sweden,15-19 June, 2014