Re: New Thread on A54 fridge pumps (ATTN: OLIVER Vela Nautica)
Oliver Henrichsen, SV Vela Nautica
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1. My brushless pump motors are a lot more efficient than the very basic brushed flowjet motors. Additional the frigoboat box applies PWM to the old brushed motor to convert 24 volts for a 12 volt pump, that adds even more unefficiency to the old system.
2. Reliability: brushless motors are used in places where reliability and 100% duty is required. Like atomic power plants, industry aso. With my conversion we get rid of most of the wear. At Scott we had to use a simple brushless motor because COVID-19 prevented us from shipping our new designed motors with advanved 100% duty marine bearings.
3. For the boats using RAWwater for cooling, I created a pump version that flushes the tube system automaticaly to prevent silt.
4. Scott measured 5 liter per minute at 25% motor speed. As the speed is free to adjust, the flowrate can be adjusted to the optimized rate. I run the pump at 30% and higher in flush mode.
As we are going to convert an other Boat to the new system we will get more data about the energy savings.
Oliver from Vela Nautica
On Mon, Nov 16, 2020, 23:23 Scott SV Tengah <Scott.nguyen@...> wrote:
Second update: I measured the pump flow rate on the original flojet with a hose and bucket and it was 6.5 liters per minute.