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The transparency and repeatability of building energy performance certification
Author(s)
Date Issued
2005-10
Date Available
2012-11-26T16:32:19Z
Abstract
The European Union’s (EU) Energy Performance of Buildings Directive (EPBD) aims to increase the
energy performance (EP) of buildings by requiring EU Member States to develop an EP calculation
methodology and to certify the EP of their buildings. Dynamic simulation offers an important means of
developing accurate EP ratings. However, its value may be undermined due to the difficulty in obtaining
transparent and repeatable input data on existing buildings. Using the EnergyPlus simulation engine and a
DesignBuilder interface this research investigated the impact of this difficulty on the EP grade of four
primary school buildings. Survey and on-site refinement phases enabled base case buildings to be
modelled, a standard activity schedule to be developed and the lack of transparency and repeatability in
the specification of the infiltration air change rate (ACH), the boiler efficiency and glazing parameters to
be seen. Using parametric sensitivity analysis in combination with the draft European standard for the
energy certification of buildings, prEN15217:2005, it was found that variations in the specification of
these parameters could lead to up to two grade changes for boiler efficiency and ACH, one grade change
due to the sensitivity of the glazing parameter and three grade changes should their affect be combined.
Although repeatability and transparency can be improved through careful training of building EP
assessors and the awareness of a particular parameters affect on an EP grade, it will be difficult to ensure
repeatability and transparency using a dynamic simulation EP grading methodology if experimental
testing is not utilised.
Sponsorship
Not applicable
Type of Material
Conference Publication
Publisher
Dynastee
Copyright (Published Version)
2005 Dynastee
Subject – LCSH
Buildings--Performance--Standards
Buildings--Performance--Auditing
Energy auditing
Language
English
Status of Item
Peer reviewed
Conference Details
International Conference on the Dynamic Analysis, Simulation and Testing Applied to the Energy and Environmental Performance of Buildings, 12-14 October, 2005, Athens, Greece
This item is made available under a Creative Commons License
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