Enhancement of the UK Standard Assessment Procedure (SAP) solar water heating prediction algorithm using parametric dynamical thermal simulations

Gavin Bruce Murphy, Aizaz Aamir Samuel, John Counsell

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Abstract

SAP is the UK Government’s method for calculation of a dwelling’s energy efficiency and carbon dioxide emissions.
This paper presents a method of informing the SAP procedure regarding evaluation of the advantage given to SAP ratings by installation of typical domestic Solar Domestic Hot Water (SDHW) systems. Comparable SDHW systems were simulated using the dynamic thermal simulation package TRNSYS and results were translated into empirical relations in a form that could be input into the SAP calculation procedure. Findings were compared against the current SAP algorithm and differences explained.
Results suggest that calculation variances can exist between the SAP methodology and detailed dynamic thermal simulation methods. This is especially true for higher performance systems that can deviate greatly from default efficiency parameters. This might be due to SAP algorithms being historically based on older systems that have lower efficiencies. An enhancement to the existing SAP algorithm is suggested.
Original languageEnglish
Number of pages8
Publication statusPublished - 14 Nov 2011
EventBuilding Simulation 2011 Conference, BS2011 - Sydney, Australia
Duration: 14 Nov 201116 Nov 2011

Conference

ConferenceBuilding Simulation 2011 Conference, BS2011
CountryAustralia
CitySydney
Period14/11/1116/11/11

Keywords

  • standard assessment procedure (SAP)
  • solar domestic hot water (SDHW)
  • TRYNSYS
  • Dynamic simulation
  • parametric model

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    Murphy, G. B., Samuel, A. A., & Counsell, J. (2011). Enhancement of the UK Standard Assessment Procedure (SAP) solar water heating prediction algorithm using parametric dynamical thermal simulations. Paper presented at Building Simulation 2011 Conference, BS2011, Sydney, Australia.