Transcript David Thorogood

Thinking about Energy
Efficiency
David Thorogood
Environmental Strategy & Development
Manager
East Herts Council
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Why energy efficiency?
Check your energy efficiency
Key actions
Community Energy
Climate Change
Likely Future trends in Hertfordshire 2041-60
(low to
medium scenario):
•Daily max summer temp: 3 to 6 degree rise over 30 yr mean
•5 day winter rain accumulation : 6 to13mm over 30 yr mean
• Max summer typically 30°C. Hottest day around 35°C.
Longer heatwaves
• Increase extreme events drought / flood/ wind/ snow?
•Water Abstraction demand: 150 to 200% of current
(UK Cttee on Climate Change Risk Assessment 2017)
Climate Change
• Climate Change Act set UK emissions reduction
80% by 2050 (1990 base)
• UK has achieved 35% cut but heading off track
• Domestic/commercial emissions will need further
year on year 3% drop
• So significant action needed
• Adds to pressure on price
Fuel Costs
• Generally upward
price rise in all fuel
types over time
• Some stability this
year
• But is this about to
change?
• Significant rises still
looking likely next
year
What?
• Need to take stock
• Review your energy use
• Look to the future
“If you can’t measure it, you can’t
manage or improve it.”
How?
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Audit your energy use
Take regular meter readings (Smart?)
Assess overnight energy use
Check your tariff!
Off gas? Oil club
Benchmark & seek advice
Remember the energy hierarchy:
– Switch off and save
– Tariff/ Insulate/ equipment efficiency
– Then consider alternative energy
Smart Meters
Government mandated installation by energy suppliers of smart energy
meters in all domestic and smaller non-domestic premises by 2020
Behaviour Change
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Review heating/cooling time
Reduce temp when possible
Stop manual override
Reduce lighting load – switch off and
more efficient luminaires
5. Keep up to date with maintenance
Heating
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Do you have effective/any controls?
Check timings
Effective insulation
Reduce thermostat by 1 degree
Check system balanced
Weather dependant time switches
Modern boilers – now 90% efficient
TRV’s
App based control
Cooling?
Hot Water
• Hot water
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set to 60 degrees
check timings
aim for water to run out at end of day
smaller cylinder/ instantaneous?
even the tea urn!
Lighting
• Assess wattage and needs
• Any incandescent bulbs?
• Fluorescent good (T12/T8/T5), but
LED much better
– 50% less energy/ 5-10 times longer
(reduced maintenance) /3-7 yr pay back
• Use PIRs for infrequent areas
• Costly Flood lighting?
- switch to LED
Insulation
Insulation
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Loft insulation: £5/m2 = 1-2yrs
Cavity wall insulation: £5/m2 = 2-3yrs
Suspended Floor insulation: £5-£10/m2 = 5-10 years
Flat roof insulation (internal/external): Expensive and often
best done as part of roof refurbishment £15/m2 = 15+yrs
• Solid wall internal/external: £20/£45per m2 =12-20 yrs
• Double Glazing :Generally only cost effective when
replacing old windows £250+/m2 = 20+years
• Tank jackets/pipes/draught proofing: always makes sense
Thermal Imaging Camera
Look to the future
• Renewables
- costs falling;
- range of technologies inc solar;
heat pumps; biomass and micro CHP
• Battery storage – perhaps the next big
thing?
• EV charging hubs
Grants
Carbon Trust: Green Business
Fund
• Up to £10,000 to put towards
the purchase and installation
of energy efficient equipment
• Expected savings must
exceed project costs in 5
years max
• Must have charitable status
• Equipment should be
purchased from Green
Business Directory supplier
East Herts Council
•Community Capital Grants
•Leaf Grants
ACRE
•Rural Community Buildings
Loan Fund (Loans up to £20K)
Community Energy
• Government 2015 Community Energy Strategy
• Collective action to reduce, purchase, manage &
generate energy
• Emphasis on local engagement, community
control, local benefits
• 3 aims:
• Maintain energy security/tackle climate change
• Saves people money .
• Encourages wider social/economic benefits inc
community cohesion
Community Energy
“Community energy is all about people
and communities working together to
save, generate, purchase, and
manage energy, with local people
benefiting from the power produced or
saved.”
Community Energy
Locally:
• Herts CE network to bring groups together
• Work with schools to promote concept
• 310 possible community assets for PV in
East Herts = possible 119,000kW
generating potential
• Hertford Energy Now – 3 schemes@ Mill
Meads; Hunsdon; Morgan schools
A decade of growth
• In 2005 fewer than 20 community energy
projects
• Now 30x that number!
• In Germany c.65% of its huge renewable energy
capacity is community-owned.
• UK community ownership is less than 10%
Total share of electricity generation from
renewables over 25%
Contact:
David Thorogood
01992 531621
[email protected]
www.eastherts.gov.uk