The Solar Boiler™ module is a Shell-and-Coil all copper heat exchanger and glycol reservoir with eMag Solar Pump™. The heat transfer fluid in the solar loop circulates from the reservoir to the solar collectors and back through the coils of the heat exchanger using the Solar Pump's positive displacement pump. The solar loop is closed from the atmosphere and regulated by the Solar Pump's built-in differential temperature controller. Circulation on the shell or water side of the heat exchanger is generated by natural circulation.
Shell & Coil Heat Exchanger: The Solar Boiler™ uses Thermo Dynamics high performance Shell-and-Coil™ heat exchanger mounted in the Side-Arm™ configuration. This system provides a highly stratified storage tank. The storage tank can be any commercially available tank with the correct connections.
Controls: The Solar Boiler™ uses a proportional control strategy, achieved by the variable output of a 20W photovoltaic module. The variable collector flowrate and thermosyphonic flow between the Solar Boiler™ and the storage tank ensure that high quality water is supplied to the auxiliary heater throughout the year. The PV module drives the brushless DC motor through a linear current booster to ensure good performance at low light levels.
The e-Mag Solar Pump™ with Differential Temperature Control & Linear Current Booster (LCB) is a brass body, vane-type, positive displacement pump. The pump has special clearances and ethelyene-propylene seals for high temperature protection. It has a maximum output pressure of 500 kPa (73 psi). The nominal flow rate is 1.2 L/min. (0.32 USGPM). The pump is driven by an efficient brushless DC motor and includes a differential temperature controller. Nominal power consumption is 18 watts (1/40hp) at nominal 12 VDC.
The e-Mag Solar Pump™ motor driver includes TDL's most recent Linear Current Booster (LCB) technology to match the power delivery of the PV module to the D