Dust Collection Boost

[swilkinson]

I've been pondering an idea to boost the suction on my DC system. I'm currently running a 2 stage system with a Woodcraft trash can separator between the machines and my 1.5 HP Delta DC unit. I'm considering connecting my 6.5 HP Shop-Vac to the trash can as well.

What do you think the effects would be?

Will the DC and SV fight each other and reduce overall suction or will the system generate more suction?

Some pieces of equipment (like my miter saw) have a 1.5? inch connector. The Delta's high volume low pressure approach seems much less effective connected to these smaller hoses. Will the proposed system be more efficient or less efficient depending on the available intake air (restricted air flow from smaller 1.5" connector vs 4" connector)?

Any thoughts?

Thanks!

Scott

[cgallery]

I can't wait to read the replies on this one. Any fluid dynamic experts out there?

My guess: Properly connected, the result would be a noisy system with both high static pressure AND high volume of air movement.

[LCHIEN]

From a strictly technical POV,
attaching te DC and tehe vac so they both pull on the Separator
wil do this:
increase the air flow at the inlet of the duct leading to the separator
increase the pressure loss in the duct leading to the sep. (due to fixed resistance and increased flow)
decrease the flow to the DC and
contribute some flow to the Vac,
where the total flow of the vac and the DC will be greater than the DC was before. Probably 9)% ot the DC and 10% to the Vac.
If the vac doesn't have filtering as good as the DC, then the vac will pump particles back into the air.

It will be twice as noisy and pull a lot of amps.

I wouldn't bother.

[swilkinson]

I love this forum.

Normally I have to try my stupid ideas to see if they work?

LCHIEN

If I read your response correctly your are saying it will have the desired effect just not much of one and it will be very inefficient.

increase the air flow at the inlet of the duct leading to the separator
increase the pressure loss in the duct leading to the sep. (due to fixed resistance and increased flow)

This is basically Bernoulli's Principal. RIGHT?

Thanks!

Scott