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<body class='hmmessage'><div dir='ltr'>Hi TRNsys community,<br><br>I am working on a water heating simulation using a PV panel. I am using for this power from PV panel to supply an electric heating device within a hot water storage tank (type 534).<br>The tank also contains an auxiliary heater placed on top (node 2) in case the set point temperature (T° of Node 1) is not reached.<br>I would like to put a controller between the PV panel,the tank and its heating devices.<br><b>That's how I would like it to work :</b><br><br>First, I want the PV panel to supply power on daylight. Then during the night, the controller should activate the auxiliary heater.<br><br>Also, on daylight, if irradiance is not sufficient to reach the set point temperature in a tank (T° of Node 1 observed by an aquastat), the controller should activate the aux. heater.<br><br>Finally, when the irradiance is high or when the set point temperature is already reached on daylight, I want the controller to switch PV panel power supply from supplying the electric heating device to supplying a battery linked to the grid (Type 188a).<br>In that case, the aux. heater should obviously be switched off.<br><br>What Type(s) should I use for the controller ?<br>What do you think of this 'scenario' ?<br><br>Thanks in advance for your reply. I extremely need your help.<br><br>p.s : please find a draft of the worksheet of my simulation attached to this email<br><br>Best Regards,<br>Anas MAJDOULI<br> </div></body>
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