Operating method for a solar collector plant, and control...

F - Mech Eng,Light,Heat,Weapons – 24 – J

Patent

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F24J 2/40 (2006.01) F24J 2/24 (2006.01) F24J 2/28 (2006.01)

Patent

CA 2245091

A solar collector plant having a radiation absorber (1) with a number of channels for conducting heat receiving liquid, said channels accommodating particles for capillary effect lifting of the liquid to an effective sweeping of the sun-facing surface layer of the absorber, is started after a prolonged operation standstill by driving a liquid pump (7) intermittently by means of a control unit (13) acting according to a clock-controlled program. In the intermittent start-up phase, first the pump (7) is driven for 2-4 minutes, thereafter it is shut down for a time span of about 20-60 seconds, and this is repeated two or three times before a continuous operation phase is started. Thereby air in the absorber (1) channels is expelled more rapidly.

L'invention concerne un capteur solaire comportant un absorbeur de rayonnements (1) doté d'un nombre de canaux acheminant le liquide recevant la chaleur. Ces canaux renferment des particules destinées à faire monter le liquide par effet capillaire afin d'effectuer un balayage efficace de la couche superficielle de l'absorbeur faisant face au soleil. La mise en marche du capteur, après un arrêt prolongé, s'effectue en entraînant de manière intermittente une pompe de liquide (7) à l'aide d'une unité de commande (13) répondant à un programme réglé par une minuterie. Dans la phase de démarrage intermittente, la pompe (7) est d'abord entraînée pendant 2 à 4 minutes, puis elle est arrêtée sur un laps de temps compris entre environ 20 et 60 secondes; et on répète cette opération deux ou trois fois avant de démarrer une phase de fonctionnement continu. L'air des canaux de l'absorbeur (1) est ainsi expulsé plus rapidement.

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