TY - GEN
T1 - Discrepancies between theoretical and actual heating demand in Scottish modern dwellings
AU - Bros-Williamson, Julio
AU - Stinson, Jon
AU - Garnier, Celine
AU - Currie, John
N1 - Funding Information:
The author wishes to acknowledge Julie Watson and Bill Banks from Kingdom Housing Association, as well as all the residents and system providers part of the HIS project.
Publisher Copyright:
Copyright © NCEUB 2017.
PY - 2017
Y1 - 2017
N2 - The study reports on the differences between the actual heat consumption profiles of twelve dwellings monitored for four years and their predicted heat demand profiles as calculated by the UK Government's Standard Assessment Procedure (SAP). This monitoring methodology analysed the selected homes over 4 years of occupation leading to a longitudinal study. Using descriptive statistical metrics this paper considers different groupings and normalisation methods to understand differences in heat demand. It uses this methodology to compare predicted over delivered energy over longer occupation periods. The results demonstrate that the compliance SAP model, incorrectly estimates heat demand by up to one and a half times that recorded in these dwellings. It also concludes that analysing energy consumption over time should exclude early occupation years as they suffer from occupant adjustment periods. Furthermore, by applying a heat energy factor, none of the dwellings achieve equal or better consumption levels than SAP, however flats and the low consuming group dwellings achieve closest to the predicted.
AB - The study reports on the differences between the actual heat consumption profiles of twelve dwellings monitored for four years and their predicted heat demand profiles as calculated by the UK Government's Standard Assessment Procedure (SAP). This monitoring methodology analysed the selected homes over 4 years of occupation leading to a longitudinal study. Using descriptive statistical metrics this paper considers different groupings and normalisation methods to understand differences in heat demand. It uses this methodology to compare predicted over delivered energy over longer occupation periods. The results demonstrate that the compliance SAP model, incorrectly estimates heat demand by up to one and a half times that recorded in these dwellings. It also concludes that analysing energy consumption over time should exclude early occupation years as they suffer from occupant adjustment periods. Furthermore, by applying a heat energy factor, none of the dwellings achieve equal or better consumption levels than SAP, however flats and the low consuming group dwellings achieve closest to the predicted.
KW - Actual heating demand
KW - Assumed heating calculations
KW - Performance gap
KW - SAP
KW - Scottish housing
UR - http://www.scopus.com/inward/record.url?scp=85085956462&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85085956462
VL - 1
T3 - Proceedings of 33rd PLEA International Conference: Design to Thrive, PLEA 2017
SP - 361
EP - 368
BT - Proceedings of 33rd PLEA International Conference
A2 - Brotas, Luisa
A2 - Roaf, Sue
A2 - Nicol, Fergus
PB - NCEUB 2017 - Network for Comfort and Energy Use in Buildings
T2 - 33rd International on Passive and Low Energy Architecture Conference: Design to Thrive, PLEA 2017
Y2 - 2 July 2017 through 5 July 2017
ER -