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Abstract

Indoor temperature and air quality in dwellings are closely coupled. Differences between the indoor temperature and the temperature outside and in adjoining zones can influence airflow due to the stack effect, whilst changes in ventilation can cause changes in indoor pollution and temperature. This paper demonstrates the relationship between an indoor air pollutant, PM_2.5, and temperature in UK domestic building archetypes using the dynamic thermal and contaminant modelling capabilities of EnergyPlus 8.0 under various UK Climate Projections 2009 (UKCP09) scenarios (current, current ‘hot’, 2050 High Emissions and 2050 High Emissions ‘hot’), with both internal and external PM_2.5 sources. Results indicate that flats have 0.7–0.8 times as much outdoor PM_2.5 infiltrating indoors compared to detached dwellings, but 1.8–2.8 times more PM_2.5 from indoor sources. During hot periods, temperature-dependent window opening increases exposure to outdoor PM_2.5, meaning that as temperatures rises, dwelling occupants will become exposed to relatively higher levels of outdoor PM_2.5 and lower levels of indoor PM_2.5 due to the need to increase dwelling ventilation. The practical implications for government and designers and possible policy implications of this research are discussed.

Practical applications : This paper demonstrates how an increase in summertime ventilation is necessary in UK homes to reduce overheating risks due to climate change and energy-efficient building retrofits. This, in turn, will lead to a change in the profile of indoor air pollution exposure, with greater exposure to pollution from outdoor sources and reduced exposure to pollution from indoor sources. Roof insulation and trickle vents reduce overheating risk, whilst increased use of mechanical ventilation heat recovery systems in the UK is encouraged, as it offers the co-benefits of cooling through increased ventilation, energy recovery and the potential to reduce indoor pollution levels.

Keywords

Overheating EnergyPlus

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References

Murphy

Sexton

Jenkins

. UKCP09 climate change projections, Exeter: Met Office Hadley Centre, 2009.

HM Government. Low carbon construction, London, UK: Inovation and Growth Team, 2010.

Johnson

Kovats

McGregor

. The impact of the 2003 heat wave on daily mortality in England and Wales and the use of rapid weekly mortality estimates. Eurosurveillance 2005; 10: 168–171.

PHE. Public health outcomes framework tool, London: Public Health England, 2012.

Schweizer

Edwards

Bayer-Oglesby

. Indoor time-microenvironment-activity patterns in seven regions of Europe. J Exp Sci Environ Epidemiol 2007; 17: 170–181.

Beizaee

Lomas

Firth

. National survey of summertime temperatures and overheating risk in English homes. Build Environ 2013; 65: 1–17.

Mavrogianni

Wilkinson

Davies

. Building characteristics as determinants of propensity to high indoor summer temperatures in London dwellings. Build Environ 2012; 55: 117–130.

Porritt

Cropper

. Heat wave adaptations for UK dwellings and introducing a retrofit toolkit. Int J Disast Resil Built Environ 2013; 4: 2–2.

Peacock

Jenkins

Kane

. Investigating the potential of overheating in UK dwellings as a consequence of extant climate change. Energy Policy 2010; 38: 3277–3288.

10.

Oikonomou

Davies

Mavrogianni

. Modelling the relative importance of the urban heat island and the thermal quality of dwellings for overheating in London. Build Environ 2012; 57: 223–238.

11.

Gupta

Gregg

. Preventing the overheating of English suburban homes in a warming climate. Build Res Inform 2013; 41: 281–300.

12.

Mavrogianni

Davies

Taylor

. The impact of occupancy patterns, occupant-controlled ventilation and shading on indoor overheating risk in domestic environments. Building and Environment 2014; 78: 183–198.

13.

Taylor

Davies

Mavrogianni

. The relative importance of input weather data for indoor overheating risk assessment in dwellings. Build Environ 2014; 76: 81–91.

14.

Shrubsole

Ridley

Biddulph

. Indoor PM2.5 exposure in London’s domestic stock: modelling current and future exposures following energy efficient refurbishment. Atmos Environ 2012; 62: 336–343.

15.

Taylor

Shrubsole

Biddulph

. Simulation of pollution transport in buildings: the importance of taking into account dynamic thermal effects. Build Serv Eng Res Technology 2014; 35: 682–690. DOI: 0143624414528722.

16.

Taylor J, Shrubsole C, Davies M, et al. The modifying effect of the building envelope on population exposure to PM2.5. Indoor Air 2014; 24: 639--651. DOI: 10.1111/ina.12116.

17.

NERC. AWESOME: Air pollution and WEather-related health impacts: methodological study based on Spatio-temporally disaggregated multi-pollutant models for present-day and future. http://www.bartlett.ucl.ac.uk/iede/research/project-directory/projects/awesome (2014, accessed 8 January 2015).

18.

Mavrogianni A, Davies M, Taylor, J, et al. Assessing heat-related thermal discomfort and indoor pollutant exposure risk in purpose-built flats in an urban area. In: CISBAT – international conference on clean technology for smart cities and buildings. Lausanne, Switzerland, 2013.

19.

DCLG. English Housing Survey 2011–12, London: Department of Communities and Local Government, 2013.

20.

Oikonomou, E, Mavrogianni, A, Raslan, R, et al. English archetypes: developing a domestic model for building performance calculations. Submitted.

21.

SI. SAS software: version 9.3. Cary, NC: SAS Institute, 2013.

22.

BRE. The government’s standard assessment procedure for energy rating of dwellings, Watford, UK: Building Research Establishment, 2009.

23.

Porritt

Shao

Cropper

. Ranking of interventions to reduce overheating in dwellings during heat waves. Energy Build 2010; 55: 16–27.

24.

Milner

Shrubsole

Das

. A caution for home energy efficiency and radon-related lung cancer risk: modelling study. BMJ 2014; 348: f7493–f7493.

25.

HM Government. Building regulations approved Document F. London, UK: UK Government, 2010.

26.

DECC. Warm front, London: Department of Energy and Climate Change, 2011.

27.

Mavrogianni

Wilkinson

Davies

. Building characteristics as determinants of propensity to high indoor summer temperatures in London dwellings. Build Environ 2012; 55: 117–130.

28.

Dimitroulopoulou

Ashmore

Hill

MTR

. INDAIR: A probabilistic model of indoor air pollution in UK homes. Atmos Environ 2006; 40: 6362–6379.

29.

Long

Suh

Catalano

. Using time- and size-resolved particulate data to quantify indoor penetration and deposition behavior. Environ Sci Technol 2001; 35: 2089–2099.

30.

Klepeis

Nazaroff

. Modeling residential exposure to secondhand tobacco smoke. Atmos Environ 2006; 40: 4393–4407.

31.

Eames

Kershaw

Coley

. On the creation of future probabilistic design weather years from UKCP09. Build Serv Eng Res Technol 2010; 32: 127–142.

32.

CIBSE. Environmental design, London: Chartered Institution of Building Services Engineers, 2006.

33.

Lomas K and Kane T. Summertime temperatures in 282 UK homes: thermal comfort and overheating risk. In: Proceedings of 7th Windsor conference: the changing context of comfort in an unpredictable world Cumberland Lodge, Windsor, UK, 12–15 April 2012. London: Network for Comfort and Energy Use in Buildings.

34.

Wright

Young

Natarajan

. Dwelling temperatures and comfort during the August 2003 heat wave. Build Serv Eng Res Technol 2005; 26: 285–300.

35.

Hacker

De Saulles

Minson

. Embodied and operational carbon dioxide emissions from housing: a case study on the effects of thermal mass and climate change. Energy Build 2008; 40: 375–384.

36.

CIBSE. TM52: the limits of thermal comfort: avoiding overheating in European buildings, London: Chartered Institution of Building Services Engineers, 2013.

37.

de Dear

Brager

. Thermal comfort in naturally ventilated buildings: revisions to ASHRAE Standard 55. Energy Build 2002; 34: 549–561.

38.

EN15251: 2007. Indoor environmental input parameters for design and assessment of energy performance of buildings addressing indoor air quality, thermal environment, lighting and acoustics, Paris, France: Thermal Environment, Lighting and Acoustics, AFNOR, 2007.

39.

Lomas

Giridharan

. Thermal comfort standards, measured internal temperatures and thermal resilience to climate change of free-running buildings: a case-study of hospital wards. Building Environ 2012; 55: 57–72.

40.

DEFRA. Report: fine particulate matter (PM2.5) in the United Kingdom, London: Department for Environment, Food, and Rural Affairs, 2012.

41.

ECI. 40 Percent house, Oxford: Environmental Change Institute, 2005.

42.

Fabi

Andersen

Corgnati

. Occupants’ window opening behaviour: a literature review of factors influencing occupant behaviour and models. Build Environ 2012; 58: 188–198.

43.

Dubrul C. Inhabitant behaviour with respect to ventilation – a summary report of lEA Annex VIII. Berks, UK, 1988.

44.

Stevens G and Russill J. Do U-value insulation? England’s field trial of solid wall insulation. In: ECEE Summer Study Proceedings, European Council for an Energy Efficient Economy, 2013. International Energy Agency’s Energy in Buildings and Communities Programme.

45.

Crump

Dimitroulopoulou

Squire

. Ventilation and indoor air quality in new homes. Pollution Atmosphérique 2005, pp. 71–76.

Understanding and mitigating overheating and indoor PM 2.5 risks using coupled temperature and indoor air quality models

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