Solar Roofing Tileswith incorporatedwater tubeThermal recovery of solar radiation.
Examples of coverage in tiles. This isthe Langres Cathedral located inFrance.
The Cathedral Saint Stéphane , inVienna, Austria.
Cover of a typical house in theMediterranean country, with channeltiles.
These roofs are part of our cultural andhistorical heritage. They are aesthetic andwell protected by a sustainable andsecular component, clay tile.Different collector systems are now ableto recover thermal energy radiated by theSun.They are not very aesthetic, and theirmanufacturing need expensivematerials, a lot of time and energy.
Main of them are tubular collectorsand flat plate solar collectors.
An other solution can work preservingaesthetics of existing buildings.It is a very low cost system, using claytiles as thermal collector.
My target was captation of theheat existing between tile androof without any visible system
The system I have invented can work with all standard pattern tiles
Thermal performance tests wereconducted by the University of Évryfor several months.
Main purpose was evaluation of theperformance of this tile modified forheat recovery.Installation can also evaluateperformance and behaviour changesin variable environment(sun, heat, water flow, etc)
Testing facilities created and used byProfessor Ayoob and MichaelGermant during the campaign.
rendement 0.600 0.500 0.400 0.300 740W/m² 0.200 0.100 T entrée (°C) 0.000 0 5 10 15 20 25 30 rendement 0.600 0.500 0.400 0.300 370 W/m² 0.200 0.100 T entrée (°C) 0.000 0 5 10 15 20 25 30The one square meter patented roof tiles istested according to different levels of solarradiation. Here: 370 W/M² and 740 W/M²
rendement 0.600 0.500 0.400 0.300 qm=1 L/ minute 0.200 0.100 T entrée (°C) 0.000 0 5 10 15 20 25 30 rendement 0.600 0.500 0.400 0.300 qm= 3 L/minute 0.200 0.100 T entrée (°C) 0.000 0 5 10 15 20 25 30A lot of levels of solar flux and flow were tested.Changes flow are carried out inside the collector tube. Rateof one liter per minute (up) and three liter per minute(down)
Behavior of tile panel wastested, working with different solarinsulation, water flow and watertemperature intake.The current system of Solar tiles ischeap, easy to produce locally, andsimple to use.Efficiency of the prototype tile wasmeasured around 7-20 %, withpossibilities to reach 30% afteroptimization.
Rendement 0.250 Rendement Linear (Rendement) 0.200 0.150 0.100 0.050 0.000 0.0000 0.0010 0.0020 0.0030 0.0040 0.0050 0.0060 0.0070 0.0080 0.0090 0.0100 (T*-Ta)/i (K*m²/W)Presentation of the performance datas ofthe system.
This view shows theorical solar yield curves of theinternational chart F ((Tm-Text) /i) = r.The patented tiles are compared with conventionalsolar collectors .Efficiency of the patented tiles (blue points) can beeasily improved to approximately 30 %
Tiles have a large thermal inertia.The curve shows evolution of temperature changesover time.Tiles will provide heat after sunset.
The system help easily heating buildinginstallation in springtime, summer andautumn.It is possible to fit - at very low cost - avery large surface of the roof.The materials used are sustainable, with a very long life cycle.Recycling is cheap and easy.
ProspectdevelopmentSeveral modifications are possible toimprove the recovery system.
The first way is to improvecontact between tile andheat collector network
Look at the operation more closely.I have developed a new support to facilitate tile’sinstallation, by quick stapling on the patented support
T1 Left : The support (9)differs when theroofer push down the tile (3).T2 Right : The support immobilizes the tile.
This support is multi- fonctionnal and upgrade the system with many additional benefits.Support significantly improves the contact existing between tile andwater heated network. Heat transfer become better.
Support is also designed to workunder channel tiles.
It facilitates the roofer’s setting work andsave time. 1) New patented support 2)Tube 3) Tile 9) Arm 11) Cavity 12) HookBig advantage : it allows roofer to set allthe tiles without risk of mistake, makingthem highly resistant to winds and storms.
A good way to increase performance ofthe system consists in upgrading thermalinsulation (between tile and roof)Performance improvements are possibleby modifying shape, position and size ofthe tube under the tile.Research is underway in preparation forindustrialization.
Conclusion : it’s the cheapest way toproduce hot water to heat building ordomestic use.This system is very easy toinstall, cheap, and offers smart look tonew or old buildings.Materials used are availableeverywhere, recyclable, with a very longlife cycle (minimum 30 years).This system will complement existingthermal solar solutions, discovering anew original and sustainable way.
Solar Roofing Tileswith incorporatedwater tubeThanks for your attention.Obrigado por sua atenção. Frédéric MarçaisMerci pour votre attention .