The transparency and repeatability of building energy performance certification

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Title: The transparency and repeatability of building energy performance certification
Authors: Burke, Kevin
Finn, Donal
Kenny, Paul
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Date: Oct-2005
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.
Funding Details: Not applicable
Type of material: Conference Publication
Publisher: Dynastee
Copyright (published version): 2005 Dynastee
Keywords: EPBD;Energy;Performance;Certification
Subject LCSH: Buildings--Performance--Standards
Energy auditing
Language: en
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
Appears in Collections:Architecture, Planning and Environmental Policy Research Collection

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