ARC 08 Water Reprocessing

ARC 08 SUMP

Another major project right now is the water reprocessing system in the
ARC. Here we see the assembled sump with cover with pass-throughs for:

* Grey Water
* Black Water
* Vent Line to Carbon Filter (visible in the picture)
* Electrical Lines for:
o Sump Pump 1 (with float switch) to Methane Digester
o Sump Pump 2 (with float switch) to Old-Main septic tank
o Over Fill Float Switch - sets off alarm when the first two
pumps aren't pumping and the sump fills up.
* Sewage line to Methane Digester

The next picture is the Control Panel for the sump. Besides the GFI's,
the main purpose of this is to house the alarm, and allow an overfill
float in the methan digester to disable the pump to it.

Here is the "blueprint" for it.

And the third picture is of the nice utility chase on the ceiling to
pass all the pipes and conduits through. In this picture, only the 1.5"
sewage line is in place.

Quieter duct conenctors

These are part of Ben's project to quiet the fans in Old Main. The
rubber gasketing is meant to isolate the vibrations the fan makes from
the ducts attached to them.

Jeff at the electrical bench

Here is Jeff working on the HUGnet Controller prototype at the
electrical bench.

Wayne at work

Here we see a picture of Wayne drawing up the corner fittings for the
solar panel with the modifications from our last experiments.

Tube gluing test

For the upper tub fitting, we're trying to get rid of the leak potential
fromt he fitting and o-ring. So we drilled the hole out to .250 for the
tube to be insterted, then drilled out a bit with .015 and .030 rees
around it for the glue. Then we made holes from the outside to be able
to insert the glue with a syringe.

We did the .030 one first, but hte hole for the syringe wasn't big
enough. It worked, but with effort. On the .015, we drilled the hole
out to .160 to make room for that syringe. Then it worked beautifully.
I like the .015 better because it requires a thinner layer of glue.

.015 and .030 recessed glue better

As hoped, the glue filled in the recessed areas nicely.  This leaves less room for the liquid to get under the cap and push it out.  The square edge inside at the edge of the recess was tricky to get onto the cap.  It also scraped the glue so it pile up in the recess.  The area where the corner is over the twin wall was kinda inconsistent, though.  Handling after the glue is in place may also shift it and leave voids.

Next experiments:

1. Bevel the edge of the recess
2. Try 60 degree bevel at the first lead in
3. Try one long taper instead of a stepped recess
4. Try each of the above at .030 and .015 recess depth

Corner glue test#1

This is standard corner with a 45 degree bevel on the leading edge.
This allows the glue to pile up under that and some of it slides all the
way under better. You can see in the picture the light spots with
insufficient glue. The bead around the perimeter is an improvemet, but I want the glue under the whole thing to prevent the liquid pressure from getting under it and prying it apart.