[PSUBS-MAILIST] scrubber performance

[Alan via Personal_Submersibles]

I wonder if there would be any merit in ducting air from the motor
controllers to the scrubber fan. They would be the biggest source
of heat in the sub & as well as heating the scrubber, they would be
cooled by the air flow.
Alan

Sent from my iPad

> On 16/02/2017, at 8:59 AM, Sean T. Stevenson via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Would applying a thin layer of insulation (e.g. Armaflex) to the inside of the hull be a feasible way of keeping the cabin temperature up over the course of a dive?
> 
> Sean
> 
> 
>> On February 15, 2017 11:33:32 AM MST, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>> Sean,
>> You were correct, I pre heated the sub to 20C and the performance improved, after 10 minutes or so the scrubber performance really improved.  When I travel to my dive site, I will turn on the scrubber while the sub is hot inside and it can get warmed up before I dive.  I put a PWM controller on the fan but it performs best at full speed.
>> The new Radial scrubber alone keeps up just fine (1700 PPM ) with the sensor at the front of the sub and the circulation fan running about 1\4 throttle.
>> I will likely need both scrubbers going with a passenger.
>> Hank
>> 
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