Cold comfort or too hot to handle? Caring for our future built environment

Transcription

1 Cold comfort or too hot to handle? Caring for our future built environment Exeter 5 th October 2017 Tony Norton Director Centre for Energy and the Environment University of Exeter a.d.s.norton@exeter.ac.uk Luke Mitchell Energy and Sustainability Manager RD&E NHS Foundation Trust luke.mitchell@nhs.net 1

2 UK CO 2 emissions in % buildings 20% 70% 3% 7% Residential Public Commercial Other non building Note: Direct and indirect (grid electricity) emissions Source: Committee on Climate Change

3 Trends in CO 2 emissions from UK buildings Note: Direct emissions only Source: Committee on Climate Change

4 Trends in UK residential energy efficiency Source: Committee on Climate Change

5 CCC indicators for reducing building emissions 5

6 UK buildings policy gap Source: Committee on Climate Change

7 Adapting to future climate Predicted UK heat wave frequency Source: CEE 7

8 Montgomery Primary School, Exeter The UK s first zero carbon in use Passivhaus climate change ready school Source: CEE 8

9 Adapting buildings to climate change underway St Loyes Extra Care, Exeter Source: Gale and Snowden Architects 9

10 Adaptation for Heat - Passive Cross-ventilation 10 to15% improvement over heating compared with single-sided ventilation Super insulated envelope - helps to stabilise internal temperatures and reduce solar gain - 3 to 6% improvement Intelligent ventilation control - intelligent window control 4% improvement Extracting heat at source - relocation of internal heat gains outside thermal envelope - 5% improvement Mass vs lightweight construction 2 to 4% improvement with mass Living plants/landscape - green microclimates - reduce summer temp by 3% and internal temps by 1.5 C Solar shading - local shading - 2% improvement Source: Gale and Snowden Architects 10

11 Adaptation for Heat - Active People-centred: Ceiling-mounted fans in rooms - increase air movement and sweat evaporation. Drinking points - aid hydration Management/staff heat stress awareness and training. No cooking in flats during heat waves - central cafe Active design: Ventilation control - windows closed when external temperatures are hotter than internal - 2 to 4% improvement MVHR coupled with ventilation control - supply air reduced by 10 C in summer combined with closing windows when temperature is above C reduces overheating to zero for 2080 climate prediction MVHR ground cooling - close loop ground to brine exchanger Source: Gale and Snowden Architects 11

12 Adaptation for Air Pollution - Healthy Design Good ventilation rates Thermal comfort Filtration of pollutants and pollen using MVHR when needed Removal of carbon dioxide by MVHR. Non-VOC materials Plants used to clean air - courtyard design provides fresh air microclimate Cleanable surfaces to reduce dust mites infestation Radial wiring to reduce EMFs Building and landscape design working together to provide healthy environments Source: Gale and Snowden Architects 12

13 Adaptation for Water Water retention via planting and landscape design - attenuation by roots Irrigation SUDs system - underground swales and rainwater storage crate system Rainwater collection - ground and plants irrigation, flushing WCs, sluices and laundry Source: Gale and Snowden Architects 13

14 NHS carbon footprint breakdown % 15% Procurement (phama) 12% Procurement (other) Building energy Building energy 4,600ktCO 2 20% 43% Travel Comissioned outside NHS Total 22,900ktCO 2 Source: NHS SDU 14

15 Devon site CO 2 emissions 2015 Source: NHS SDU 15

16 NHS carbon reduction wedges Source: NHS SDU 16

17 Health and care CO 2 reduction to 2020 Source: NHS SDU 17

18 Energy efficiency studies at the RD&E Source: CEE

19 Energy efficiency measures at the RD&E Source: CEE

20 Energy efficiency measures at the RD&E Source: CEE

21 Exeter energy network Source: WSP

22 Cold comfort or too hot to handle? Caring for our future built environment Exeter 5 th October 2017 Tony Norton Director Centre for Energy and the Environment University of Exeter a.d.s.norton@exeter.ac.uk Luke Mitchell Energy and Sustainability Manager RD&E NHS Foundation Trust luke.mitchell@nhs.net 22