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{"id":291,"date":"2020-11-17T10:22:04","date_gmt":"2020-11-17T10:22:04","guid":{"rendered":"http:\/\/ms.iaca.fr\/?p=291"},"modified":"2020-11-17T10:22:07","modified_gmt":"2020-11-17T10:22:07","slug":"rendement-dun-chauffe-eau-solaire","status":"publish","type":"post","link":"http:\/\/ms.iaca.fr\/rendement-dun-chauffe-eau-solaire","title":{"rendered":"** Rendement d’un chauffe-eau solaire"},"content":{"rendered":"\n

Le circuit d’un chauffe-eau solaire est sch\u00e9matis\u00e9 ci-dessous:
\"\"

a. Identifier le mode de transfert de l’\u00e9nergie du soleil au panneau solaire. <\/p>\n\n\n\n

b. Un essai d’utilisation du chauffe-eau a donn\u00e9 les r\u00e9sultats suivants :
– d\u00e9bit de l’eau circulant dans le capteur D = 20 L\/h ;
– temp\u00e9rature d’entr\u00e9e de l’eau \u03b81<\/sub> = 15\u00b0C ;
– temp\u00e9rature de sortie de l’eau \u03b82<\/sub> = 40 \u00b0C.

Calculer la quantit\u00e9 de chaleur absorb\u00e9e par l’eau circulant dans le capteur pendant une heure.
Exprimer le r\u00e9sultat en kJ el en kWh.
Donn\u00e9e<\/em> : capacit\u00e9 thermique massique de l’eau c = 4,18 J\/(g.\u00b0C)

<\/p>\n\n\n\n

c. Calculer la puissance thermique du chauffe-eau lors de l’essai.<\/p>\n\n\n\n

d. La surface du capteur est S = 2m\u00b2 . La puissance solaire disponible pendant l’essai est de 800 W \/ m\u00b2.
D\u00e9finir le rendement du chauffe-eau. Calculer ce rendement.<\/p>\n","protected":false},"excerpt":{"rendered":"

Le circuit d’un chauffe-eau solaire est sch\u00e9matis\u00e9 ci-dessous: a. Identifier le mode de transfert de l’\u00e9nergie du soleil au panneau solaire. b. Un essai d’utilisation du chauffe-eau a donn\u00e9 les r\u00e9sultats suivants : – d\u00e9bit de l’eau circulant dans le capteur D = 20 L\/h ;– temp\u00e9rature d’entr\u00e9e de l’eau \u03b81 = 15\u00b0C ; – … <\/p>\n