saving energy at home · 2014-04-29 · saving energy at home nicola terry nicola.qeng-ho.org...
TRANSCRIPT
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Saving Energy at Home
Nicola Terry Nicola.qeng-ho.org
Energy-surprises.blogspot.com Energy and Carbon Emissions: the way we live today Transition Cambridge – Cambridge Carbon Footprint
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 Intternational License. http://creativecommons.org/licenses/by-sa/4.0/
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Why do you want to save energy?
• Reduce energy bills
• Reduce carbon emissions
Does it matter?
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How can we save energy?
Services
• Space heating
• Water heating
• Cooking
• Lighting and appliances
Savings
• Reduce waste
• Reduce requirement
• Increase efficiency
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Space heating – Reducing heat loss
Measure Savings Easiness
Loft/cavity insulation +++ ++
Solid wall insulation +++ +
Floor insulation ++ ++
Double/secondary glazing ++ +/++ Secondary is easier
Curtains/blinds + +++
Fix draughts +++ +++
Heat recovery ventilation ++ +
Humidity controlled ventilation ++ ++
Shock ventilation ++ +++
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Space heating – Reducing heat loss
Measure Savings Easiness
Loft/cavity insulation +++ ++
Solid wall insulation +++ +
Floor insulation ++ ++
Double/secondary glazing ++ +/++ Secondary is easier
Curtains/blinds + +++
Fix draughts +++ +++
Heat recovery ventilation ++ +
Humidity controlled ventilation ++ ++
Shock ventilation ++ +++
Green Deal
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Simple home heat loss model
http://nicola.qeng-ho.org
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Space heating – Where are the draughts?
• You tell me
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Space heating - Where are the draughts?
• Doors/windows
• Floorboards
• Skirting
• Pipes and cables that go through walls, floors, roofs
• Loft hatch
• Cat flaps/letter boxes
• Chimneys
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Space heating – Reducing heat requirement
• You tell me
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Space heating – Reducing heat requirement
Measure Savings Easiness
Turn down thermostat +++ +/++ Depends on who lives in the home
Adjust radiator valves ++ +++
Adjust timers (optimum start)
++ +++
Move the thermostat (wireless)
++ ++
Heat yourself +++ ++
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Space heating – Increase heating efficiency
• You tell me
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Saving energy – Heating efficiency
Measure Savings Easiness
Condensing boiler +++ ++
Radiator reflector panels ++ +++
Bleed radiators ++ +++
Radiator shelving ++ ++
Radiator position ++ +/++ Depends on your room layour
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Hot water savings
• You tell me
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Hot water savings
Measure Savings Easiness
Lag pipes ++ +++
Check tank thermostat + +++
Shorter showers ++ ++
Low flow shower head ++ +++
Don’t run the hot tap unless you want hot water
+/++ Depends on pipe run
+++
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Cooking
• You tell me
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Cooking
Measure Savings Easiness
Lids on saucepans ++ +++
Use microwave (reheat solid food, cook vegetables in little water)
+ +++
Heat only the water you need (kettle, boiling)
++ +++
When you use the oven fill it up ++ ++
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Lights and appliances
• You tell me
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TV size/energy label
0
100
200
300
400
500
600
14 18 22 26 30 34 38 42 46 50 54 58 62 66 70
Max
imum
on-
pow
er W
Length of diagonal (inches)
A+++
A++
A+
A
B
C
D
A A+
32” 43 W 33 W
42” 69 W 53 W
52” 102 W 79 W
Size matters more than energy label
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Energy certificates
Look for kWh/annum
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Lights and appliances
Measure Savings Easiness
Use the sun to dry your washing ++ +++
Turn things off (TV, games consoles, microwave…)
+ +++
Buy smaller ++ +++
Buy efficient +++ ++
Discard old appliances ++ +++
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Analysing your electricity use At nicola.qeng-ho.org
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Wrap up
• Main messages • Lots of ways to save energy – many quick wins
• If you fix draughts you must consider ventilation
• When you buy or change something, think small, efficient, energy saving features
More information
• www.transitioncambridge.org/faqs
• energy-surprises.blogspot.co.uk