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Thermal performance analysis of two DualSun installations

Thermal performance analysis of two DualSun installations. Objective of the study. Project definition : Study realized over 9 months (April – December 2014) by the engineering firm Trans énergie , specialized in renewable energies and energy management for more than 22 years.

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Thermal performance analysis of two DualSun installations

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  1. Thermal performance analysis of two DualSun installations

  2. Objective of the study • Project definition: Study realized over 9 months (April – December 2014) by the engineering firm Transénergie, specialized in renewable energies and energy management for more than 22 years. • Objective of the study: Mesure the temperature of the DualSun panels, as well as the solar energy provided for the domestic hot water. The study is specifically focused on thermal production. • Method used: Monitoring system installed by Transénergie, installation realized by professional installers, analysis by Transénergie.

  3. The monitored installations • The two installations are located in the Lyon region which is representative of an average climate in France • The 1st installation is “building-integrated”, while the 2nd installation is not (with non-insulated panels): this allows us to measure the impact of building-integration on the thermal performance.

  4. Conclusions of the study • The measured results are very close to the estimated results conducted with the DualSys platform (see next slide), • The DualSun panels allow a “quasi-autonomy” with respect to hot water needs during the summer and inter-season months (spring / fall), • During the hottest months, the panels never exceed 70°C, thus there is no risk for overheating with the DualSun panels.

  5. The DualSysplatform • DualSys is the 1st web-based hybrid solar simulator: the platform allows the user to precisely estimate the hot water and electricity production of a DualSun installation (based on geography, rooftop orientation, number of panels, etc.). • DualSys also provides a personalized report that can later on be used to compare measured results of the installation (via an adapted monitoring system).

  6. Installation 1: Building-integrated • Description of system: • 6 DualSun panels, • South-westfacing(20°/ South), • Tilt angle of 30°, • Building-integrated (EASY ROOF mounting system), • 300L hot water tank for 4 people, • Natural gas boiler. For more information, a detailed description of this installation isavailable on ourwebsite.

  7. Installation 1: Solarcoverage The solar coverage is the ratio of energy provided by the solar panels for the hot water compared to total hot water needs. Measured The major gap in July isexplained by a particularlycold and rainysummer 2014 in France. http://www.meteofrance.fr/climat-passe-et-futur/bilans-climatiques/bilan-2014/bilan-climatique-de-l-ete# The measuredresults are very close to DualSys estimations (3.5% error).

  8. Installation 1: Autonomy in the summer % During the summer (from June to September) DualSun allows a “quasi-autonomy” in terms of hot water needs with a solar coverage of 94%.

  9. Installation 1: Maximum temperatures Max at 68°C The maximum temperature reached in the panels is 68°C : there is therefore no risk of overheating in the panels.

  10. Installation 2: Surface mounting system • Description of system • 4 DualSun panels, • South-westfacing (50° / South), • Tilt angle of 20°, • Installation with surface mounting system, • 200 L hot water tank for 2 people, • Natural gas boiler for booster. For more information, a detailed description of this installation isavailable on ourwebsite.

  11. Installation 2: Solarcoverage The solar coverage is the ratio of energy provided by the solar panels for the hot water compared to total hot water needs. * Measured * The major gap in July isexplained by a particularlycold and rainysummer 2014 in France. http://www.meteofrance.fr/climat-passe-et-futur/bilans-climatiques/bilan-2014/bilan-climatique-de-l-ete# The measuredresults are very close to DualSys estimations (4% error).

  12. Installation 2: Autonomy in the summer * % * The major gap in July isexplained by a particularlycold and rainysummer 2014 in France. http://www.meteofrance.fr/climat-passe-et-futur/bilans-climatiques/bilan-2014/bilan-climatique-de-l-ete# During the summer (from June to September) DualSun allows a “quasi-autonomy” in terms of hot water needs with a solar coverage of 90%.

  13. Installation 2: Maximum temperatures Max at 67°C The maximum temperature reached in the panels is 67°C : there is therefore no risk of overheating in the panels.

  14. Installedsensors and measurestaken T1is the temperature of the water source (cold) of the tank thatthen passes to the DualSun panels. T2 is the temperature of the water at the output of the DualSun panels. T3is the temperature of the water at the output of the tank, exclusivelyheated by the solar panels. T4 is the temperature of the water at the output of the boiler. Le débitmètre mesure le débit de consommation d’eau. All materialusedisfrom the RESOL brand. T2 1’’ Débit T4 T3 How to calculate the energyprovided by the panels and by the booster. Solar= A * Débit * (T3-T1) Booster = A * Débit * (T4-T3) The constant A is the Cp (Capacité calorifique de l'eau) x volumic mass x le pas de temps d'acquisition du débitmètre / 3600. Solarcoverage = Solar/ (Solar+ Booster) Solar regulation T1 Hydraulic schematic of a DualSun installation with a boiler booster.

  15. Please contact us if you would like further information about this study or the performance of our installations: www.dualsun.frcontact@dualsun.fr www.transenergie.eu sun@transenergie.eu

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