Retrofit for the FutureNoel.ppt

Retrofit for the Future
Renewable Energy – Does it Work?
Noel Rice
Northern Ireland Housing Executive
Energy Conservation Unit
22nd May 2009

Home Energy Conservation Act
• Target – improve energy efficiency 34%
• No statutory enforcement powers, additional
finance or deadline specified
• Progress measured in reduced fuel use
• Average SAP in N.I. in 1996 was 35
• Solid fuel was main domestic fuel with oil
growing steadily - no natural gas
• By 2006 there was a 20% reduction in energy
consumption over 1996 figure
• Average SAP in N.I. in 2006 was 52

Domestic Fuel Mix
1996
2006
%
%
• Mains Gas
0
11.9
• Solid Fuel
40.4
5.7
• Oil
35.7
70.3
• Dual
9.3                                    5.5
• Electricity
8.8
5.2
• Other/LPG
5.8
1.4

Cavity Wall Insulation
1996
2006
No
%
No
%
Full CWI
219,600
36
434,000     62
Partial CWI
0
0
58,200       8
Dry Lining/Ext
0
0
56,400       8
No Wall Ins
382,900
64
156,400
22
TOTAL
602,500
705,000

Loft Insulation
1996
2006
No          %          No           %
Loft Insulation   460,500     76
602,200
85
None                     70,000     12
33,400         5
Not Applicable    72,000      12
69,400       10
TOTAL                 602,500
680,000

Sunderland Road

Solar PV Panels
• Cost £6,000 per kW
• Savings vary with pattern of use
• More savings where electricity used on
site
• Household needs to apply for ROCs and fit
import/export meter
• Technical y works well
• Economically depends on circumstances

Solar Ventilation System

Solar Ventilation System
• £6k to install
• Savings on domestic hot water and oil
heating
• Improved air quality
• Reduction in dampness, condensation and
mould growth

Wind Turbine - Cushendall

Wind Turbine
• £11k to install 2.5kW turbine
• Savings 35% of annual bill
• Income received from ROCs

Ground Source Heat Pump and
Solar Thermal

Ground Source Heat Pump
• Installed with underfloor heating system
and solar water heating panel
• Total cost £10k
• Total Energy Bill now £675 per annum
• Below previous annual electric bill and
further savings as a result of no coal bill at
all (average coal bill £1k per annum).
• Economy 7 tariff

Solar Roof Tiles

Solar Roof Tiles - Rathcoole
• Solar thermal and solar PV
• Total Cost per unit £12.5k
• Includes additional costs due to redesign
• Grants aided by LCBP, NIE, EST with
balance from NIHE

Micro Combined
Heat and Power

Wood Pellet Boiler - Fermanagh

Wood Pellet Boilers
• Installed costs approx £5000
• Annual heating bill £425 – coal and oil bills
exceed £1k per annum
• Savings depend on price stability
• Need medium to long-term data on
maintenance costs

Solar Water Heating

Solar Thermal in
Social Housing
• £5.2m available over two years
• SWH installations in 2,027 houses
• One of biggest SWH programmes in
Europe – now complete
• Both Evacuated Tubes and Flat Plate
• Integrated into heating conversions
• Reduced unit costs due to volume
• South facing roofs – no over shading
- no dwellings with electric showers

Solar Thermal Panels
• Costs vary - £2.5 up £4.5k per house
• Savings variable – number of factors
• Average £75 per annum
• Savings higher when displacing electricity
• NIHE don’t offer panels if tenant uses
electric shower

Carrickfergus

Dromore

Ballykelly

Lisburn

Men at Work

Reconnect Programme (Private)
Renewable Technology
Installations
• Solar Water Heating Panels
1,422
• Ground Source Heat Pumps
233
• Water Source Heat Pumps
4
• Air Source Heat Pumps
73
• Wind Turbines
152
• Wood Fuel ed Boilers
830
• Wood Pel et Stoves
34
• Solar Photovoltaic Panels
67

Do they work?
• Technical y – yes
• Environmentally - yes
• Economical y – depends on;
- the technology
- heating, hot water and electricity demand
- patterns of use, e.g. solar hot water
- receipt of ROCs where appropriate e.g. PV
• Individual needs determine viability