Greenway

  The Pump Model Name Aquapro AP1050 Waterfeature/Pond Pump Model Number 02AS003B Material Durable Plastic Wattage 18 Maximum Flow (litres per hour) 1050 Voltage 240 Cord Length (m) 10 The baffles The matrix Spray pattern

Turns out the bilge pump in the swamp cooler isn't designed to operate for hours at a time :) and it has failed. I wont need to immerse the motor so its got a good chance of surviving. Also I wont be running it constantly or flat-out. The flow rate is massive its a 12V 480W motor. Here is my offering which I will be finishing with a water tight capsule fore the motor  and some fiberglass around the base to make it strong as. It draws too much current not a sensible option after all Here's what I got instead Model Name Aquapro AP1050 Waterfeature/Pond Pump Model Number 02AS003B Material Durable Plastic Wattage 18 Maximum Flow (litres per hour) 1050 Voltage 240 Cord Length (m) 10

Solar Dashboard

  See it Live Here Swamp Cooler Back In action small bilge pump a contra rotating 120mm 12V PWM fan Simple Hubitat rule for control while I'm evaluating it. So far so good it seems almost 4°C delta T 

 

 

  30°C plus Autumn day here a good test fro the cooler in anger   70 Liter bin a tank and a 750LPH bilge pump

 Ventilation Control System Finished  Map to the following dashboard in Hubitat Independent control of 6 fans. Two boost fans individual relays and same 25Khz speed demand 

 Speed Control added to ERV heat exchanger fans and a recirculation/bypass valve between the inlet and exhaust fan. Flower pots hot glue and tie wraps the corner stone of any ventilation system.  Its a throttle valve in a manifold between the inlet and exhaust fan plenums. Fan speed is set using the existing Wemos D1 R2 which can output 25Khz accurately to drive the PWM fan speed demand signal. Code changes to the ERV DAS and the ERV Controller and related Hubitat drivers, now renamed,  Ventilation Controller as it manages the boost fans for the zones. Drivers Some testing with no pipes connected showing the blockage effect of the heat exchanger core Exhaust fan only recirculate open 100%

 

  As ever on a budget waste not want not approach. mostly stuff I had in stock Code ERV Code Six individually fused channels Power board shown in place. 35 Amp Hall effect current sensor. Driver code here  ERV Code Dashboard for ERV fan control and testing      Six controlled channels with 25Khz PWM fan speed control The first layer of the system. Two Arduinos one for control one for networking, Code here  ERV Code

  Simple loft fan rule

  New dual rotor fans slower and quieter, lower power with better static pressure. Testing shows these to be as good in terms of flow as the faster fans but with more static pressure. I suppose they are designed for use in ducting in a car.  ERV Sensors looking good revised location to get them, deeper into the airflows. All looks good, there is a throttle valve on the bypass now with a single servo. After testing the 4 port valve is not good enough it seems, no surprise. I'm looking at a simple bypass mode with a mixed fresh and conditioned inlet stream.

  Two 40 Watt fans inline 40cm diameter 4mSec at 150mm outlet .Parts total cost NZ$60