Finegan, E; Kelly, G and O’Sullivan, G (2020) Comparative analysis of passivhaus simulated and measured overheating frequency in a typical dwelling in Ireland. Building Research & Information, 48(6), pp. 681-699. ISSN 0961-3218
Abstract
Passive House Planning Package (PHPP) simulations are crucial in balancing a reduced space heat demand and reduced overheating in Passivhaus dwellings. This paper identifies the PHPP simulated overheating frequency (OF) for a dwelling in Douglas, Cork, Ireland, constructed in 2015. The measured indoor temperature is also recorded over a 12-month period. A comparative analysis of measured and simulated overheating is carried out, with two overheating thresholds of 25°C and 24°C. The simulation estimates an OF of 0.00%, for a typical year (at 25°C). The simulation relies on a dwelling average temperature, where the equivalent measured OF for the test year is 2.64%, derived from a volume-weighted mean indoor temperature (T vm). At a reduced threshold of 24°C, the measured OF is 4.67%. Measurements within 6 independent zones identify 52.61% of readings above 25°C are eliminated by using T vm. The representation of overheating as a percentage of the year is shown to distort the effect of overheating, while the T vm value overlooks variations in zonal temperature. This paper recommends that a more robust assessment tool is developed within PHPP, to predict OF for passive house dwellings, while adopting this methodology for dwellings of Nearly Zero Energy Buildings (nZEB) standard.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | climate change; nzeb; overheating; passivhaus |
| Index terms: | methodology, variation, Passivhaus, climate change, nearly zero-energy building, indoor temperature, overheating, comparative analysis, passive house, estimate, Ireland, passivhaus dwelling, package |
| Subjects: | climate science, data analysis and analytics, contractual arrangements, environmental science, financial and cost management, energy efficiency, research methods, contractual condition, Geography, health safety and environment, thermal systems |
| Topics: | Design Practice, Contract Administration, Geographical Context, Research Practice, Cost Management, Health and Safety, Procurement, Sustainability |
| Descriptive scope: | 4 PCTA |
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