|
Anas, The inverter model (Type48) is waiting for the electrical element at the bottom of the tank to tell it that it needs power (i.e. that there should be a load on it). However, the electrical element model (Type1226) is just a simple on/off device; it turns on when its control signal tells it to. The element is waiting for the inverter model and the inverter model is waiting for the element. There are a many ways that you could fix the issue but which one you choose really depends on how you want to operate the system. Here are a couple of options: 1. You can put another aquastat watching the bottom of your tank and controlling the lower element's on/off signal. The controller (and an equation) can then set a value that is either 0 (if the tank is already hot enough) or is the maximum power that the element can deliver. This value will be passed to the inverter as the load. The inverter will then send all of the power that the PV has available to the element (up to the inverter's capacity). Connect the inverter's power output to the element's capacity input. 2. Often times elements like yours aren't controlled; they just dump whatever energy they can from the PV into the tank. In this case you can get rid of the inverter and pass the PV output power directly to the element's capacity input. In this case leave the element's control signal set to zero. kind regards, David On 06/10/2015 02:05, Anas Majdouli
wrote:
-- *************************** David BRADLEY Principal Thermal Energy Systems Specialists, LLC 22 North Carroll Street - suite 370 Madison, WI 53703 USA P:+1.608.274.2577 F:+1.608.278.1475 d.bradley@tess-inc.com http://www.tess-inc.com http://www.trnsys.com |