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An Introduction To SolarWall®perforated Transpired Solar Collector (pTSC)Presented by Brian Watson
perforated Transpired Solar CollectorSolarWall® harnesses the power of the sun toprovide solar thermal energy… A solar heatingsystem saves energy, reduces heating costs, andproduces clean energy.
What is SolarWall®?• SolarWall® is a highly efficient, fresh air heating system forbuildings.• The technology originated in Canada and has been in use forover 25 years in over 30 countries worldwide.• System consists of an un-glazed, perforated TranspiredSolar Collector (pTSC).• Installed onto a buildings southerly facing elevation, thecollector allows fresh, outdoor air to be heated before beingintroduced into the building.
Transpiration Holes the Key• Perforated absorbers provide collector efficiencies ashigh as 50%This means for every 1Kw of energy of solar gain,the collector delivers 500w of usable energy
Summer By-passIn the Summer, the hot air is vented out of the top.The panels act as a sunscreen preventing thesunshine from hitting the wall
Orientation• Ideal Orientation= 96 – 100% Solar Gain• FavourableOrientation= 80 – 100%Solar Gain• AcceptableOrientation= 60%Solar Gain
Collector Properties• Material specified inColorcoat Prisma®• Collector specifically engineered tosuit each individual application• Installed 100 - 300mm from existingwall• Can be Installed over or aroundexisting windows, doors etc• No special skills or tools required forinstallation• Virtually maintenance free
• 410m² SolarWall® installed ontosouth eastern elevation• Solar heated air utilised asreplacement ventilation• Carbon neutral within the firstyear of operationCase Study: CA Group production facility.
Independent BSRIA Monitoring• 50% reduction in gas usage whendegree-day correlated• Energy and Carbon savings of303,543kWh and 58.9tCO2respectively• Truly renewable heat source• System supplies significantlymore than the 10% of heatingdemand required to be classedas “a renewable energy system”for planning purposes
Battle McCarthy Modelling Report• Independent thermal study of a1,240m² SolarWall® installationon a 18,500m² warehousedevelopment• Savings of up to 50% in heatingconsumption• Overall total energy contributionof up to 20% ( Or classified as apossible 20% renewable)• Comfortably achieves energytargets set within theMerton Rule
Battle McCarthy Modelling ReportFor a Part L compliant shed, thatrequires (>15ºC), the SolarWall® willmake a significant contribution to boththe heating and overall energyconsumption.• Heating contribution 50-70%• Overall Energy contribution 20%• Merton rule achieved Yes
Swavesey Report“All development proposals greater than1,000m² or 10 dwellings will include technologyfor renewable energy to provide at least 10%of their predicted energy requirements, inaccordance with Policy NE/2”*South Cambridgeshire Development Control Policies DPD (2007), Policy NE/2t
Swavesey Report• Independent renewable energy studyfor “the developer” of a 13,500m²mixed use development inSwavesey, South Cambridgeshire• 10% requirement for total energydemand to be met by on-siterenewables• Technical assessment of 6 suitablerenewable technologies• 595m² of SolarWall® would providemore than the required renewabledemand at the lowest cost and thequickest payback• Approximate cost £46k and paybackperiod of 3 years
Swavesey ReportTechnologyArea Used(m2)Energy Saved(kWh/year)Cost% Total EnergyRequirementMetPerforated Transpired Solar CollectorSolarWall®595 99,973 £46,775 11.38Wind Turbine Not Stipulated* 89,102 £138,000 10.14Ground Source Heat PumpNot Stipulated* 96,959 £205,000 11.04Solar Thermal (Water) Systems20 12,353 Not Stipulated* 1.41Photovoltaics 1172 87,900 £1,172,000 10.01That is a pay back in just 3 years
Summary• Free heating using the sun’s energy• Improved indoor air quality• Eliminates negative pressure situations• Significant reduction in energy usage and CO2 emissions• ‘Merton Rule’ compliant• Can be used to improve EPC ratings and contribute toBREEAM points scheme• Short payback as low as 3 years on new build and 7 years onretrofit
Case StudiesJaguar / Land RoverArea of SolarWall® 268m²Estimated Energy Savings 80,530 kWh / annumEstimated CO2 Savings 19 tonnes / annumPredicted payback of 4.9 years
Case StudiesBRE InnovationParkArea of SolarWall® 24m²Estimated Energy Savings 3,546 kWh / annumEstimated CO2 Savings 2 tonnes / annum
Case StudiesArea of SolarWall® 255m²Estimated Energy Savings 99,235 kWh / annumEstimated CO2 Savings 25 tonnes / annumBeaconsfieldMotorway Services
Case StudiesPremier ParkArea of SolarWall® 580m²Estimated Energy Savings 130,761 kWh / annumEstimated CO2 Savings 32.4 tonnes / annum
Conclusion• Lowest payback of any renewable technology that is currentlyavailable• Recognised as delivering 20% renewable not just 20%savings• 50% reduction in heating costs• Fully recyclable at the end of the buildings life• No impact on building aesthetics• Globally proven• Independently tested