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Contenido archivado el 2024-05-24

Stagnation proof transparently insulated flat plate solar collector (STATIC-2)

Objetivo

Objectives and Problems to be Solved:· Development of new concepts for the protection of TIM-collectors in stagnation conditions by taking account of the energy storage capacity of collector. New materials such as Phase Change Materials (PCM) will be looked into (very innovative).· Design of optimised stagnation proof TIM-collectors for working temperatures between 110 to 150 oC so as to give response to the energy market demand for applications at such temperatures (industrial process, LiBr absorption refrigeration machines of double effect...). A cost goal of around 200 EUR/m2 has been fixed for this project (which will be about 50% lower than the commercial evacuated tube collectors).· Consolidation of the use of TIM materials in solar collectors. Research did within this project will increase the experience of using TIM in collectors making easier the introduction of TIM in the active solar energy technology. Description of the working order to achieve the goals of the project, a work plan has been planned based on the combination of four main lines:· Optimisation and design process by means of high level computational tools. Two kind of tools already available and previously used in other projects related to solar energy will be used:
. Optimisation and designs codes with little computational effort that allow to find out the most appropriate designs for each situation.
2. High level numerical simulation tools for the detailed study of fluid dynamics and heat transfer, by means of a numerical integration of the differential equations governing the physical phenomena.· Accurate measurement of physical and radiative properties of the materials used in the new collectors: PCM, selective surface.... (this data will be used as input data in the numerical tools, making the numerical results more reliable).· Experimental data obtained form ad-hoc set ups of the most critical elements (in order to validate and compare the numerical data).· Detailed experimental data from the testing of new prototypes and arrays. The following concepts will be looked into:· Use of phase change materials (PCM) with low sensible heat and high phase change latent heat. With an adequate PCM it will be possible to avoid in the collector temperatures much higher than the PCM phase change temperature.· Increase of the mass in the collector when stagnation conditions occur.· Hybrid strategies actuating on both the energy storage capacity of the collector and the heat fluxes (solar energy and/or heat losses). Some of the strategies discarded or even not considered in STATIC-1 (because they did not guaranteed low enough temperatures in stagnation conditions) could become feasible. Expected Results and Exploitation Plans· New stagnation proof flat plate TIM collectors optimised for the medium temperatures (110 oC - 150 oC) suitable for applications such as industrial heat and LiBr absorption refrigeration machines of double effect.· Step forward to making the TIM-collector break into the market.· Increase of the know-how about solar thermal applications at medium temperatures.· Use of a new technology (phase change materials) in solar collector applications.· Enhancement of the solar thermal energy market.

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Coordinador

ITELSA S.L.
Aportación de la UE
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1,Plaza Campillo 1
37002 SALAMANCA
España

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Participantes (5)

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