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Solar PanelsSolar Panels
Outline of presentationOutline of presentation► Solar panel technology.Solar panel technology.► Solar thermal in Solar thermal in
domestic dwellings.domestic dwellings.► Solar panel orientation.Solar panel orientation.► System types.System types.► Installation & cost of the Installation & cost of the
panels.panels.► Benefits of the systems.Benefits of the systems.► Drawbacks of the Drawbacks of the
systemssystems..
Solar Panel TechnologySolar Panel Technology
► Energy from the sun-1kW/mEnergy from the sun-1kW/m²²..
► Converts solar energy into heat & electricity.Converts solar energy into heat & electricity.
► Provides energy for water & space heating.Provides energy for water & space heating.
► Relies on sunlight rather than warmth.Relies on sunlight rather than warmth.
► Used in both residential & commercial Used in both residential & commercial buildings. buildings.
OrientationOrientation
► 2 angles to consider- the 2 angles to consider- the horizontal orientation and horizontal orientation and the angle of tilt.the angle of tilt.
► The ideal horizontal The ideal horizontal orientation is South. orientation is South.
► The ideal angle of tilt is The ideal angle of tilt is approximately 45approximately 45°.°.
► Consideration of shading Consideration of shading needed.needed.
Flat plate collectorsFlat plate collectors
► Most common type. Most common type. ► Glazed & insulated box.Glazed & insulated box.► Temp range 30-70Temp range 30-70° C.° C.► Cheaper to install.Cheaper to install.► Low collection Low collection
efficiency.efficiency.► Increased panel area Increased panel area
required.required.► Less efficient in winter.Less efficient in winter.► More suited to southern More suited to southern
climates.climates.
Evacuated tube collectorsEvacuated tube collectors
► More efficient More efficient system.system.
► Temp range 30-Temp range 30-150150°C°C..
► Lightweight.Lightweight.► Better performance Better performance
in sub-optimal in sub-optimal conditions.conditions.
► Better performance Better performance off-peak.off-peak.
Sizing & InstallationSizing & Installation
► The panels will take up approx. 2-4mThe panels will take up approx. 2-4m²² of roof of roof area.area.
► Exempt from planning permission-conditional.Exempt from planning permission-conditional.► For evacuated tube system 20 - 60 tubes are For evacuated tube system 20 - 60 tubes are
necessary.necessary.► Consideration must be given to the storage Consideration must be given to the storage
capacity of the cylinder.capacity of the cylinder.► 50 litres used per person per day and tanks 50 litres used per person per day and tanks
range from 150-300 litres in size.range from 150-300 litres in size.► Use a stainless steel cylinder.Use a stainless steel cylinder.► Will heat water to up 80 degrees.Will heat water to up 80 degrees.
CostCost
►€€4500-4500-€€6000 approximate cost of 6000 approximate cost of installation.installation.
►Greener homes grant available.Greener homes grant available.►€€250 per m250 per m²-flat plate collector.²-flat plate collector.►€€300 per m²-evacuated tube collector.300 per m²-evacuated tube collector.►To a maximum of 6m². To a maximum of 6m². ►Payback?Payback?
Environmental Benefits Environmental Benefits
► A renewable energy source.A renewable energy source.
► Solar panels are non-polluting.Solar panels are non-polluting. ► Solar energy requires no fuel. Solar energy requires no fuel. ► Silent operation- no noise pollution.Silent operation- no noise pollution. ► Reduced carbon emissions.Reduced carbon emissions.
The DrawbacksThe Drawbacks
►Lifespan of only 25 years.Lifespan of only 25 years.►Expensive to install.Expensive to install.►Auxiliary back up required.Auxiliary back up required.► Inefficient in Irish climate.Inefficient in Irish climate.►Site suitability.Site suitability.►Energy required to produce the panel.Energy required to produce the panel.►An uneconomical decision to use solar An uneconomical decision to use solar
panels for domestic dwellings.panels for domestic dwellings.
MethodMethod RatingRating € € - cost- cost PaybackPayback Savings Savings Disruption Disruption
Cavity wall insulation to Cavity wall insulation to external wallsexternal walls
********** €€440440 33 €€145 145 MinorMinor
Increasing insulation in Increasing insulation in loft loft
******** €€325325 55 €€6060 MinorMinor
Replace heating system Replace heating system including pipe work including pipe work
****** €€71407140 3131 €€230230 MinorMinor
Install condensing boiler Install condensing boiler to replace existing to replace existing
boiler boiler
****** €€17201720 1818 €€95 95 MinorMinor
Install solar panelsInstall solar panels **** €€40004000 4040 €€100100 MinorMinor
Summary of energy saving Summary of energy saving methodsmethods
SummarySummary
►Solar energy is free.Solar energy is free.►Environmentally friendly solution.Environmentally friendly solution.►Better suited to water heating.Better suited to water heating.►Evacuated Tube system is more efficient.Evacuated Tube system is more efficient.►Government grant assistance available.Government grant assistance available.►Perhaps the least cost effective energy Perhaps the least cost effective energy
saving method.saving method.