The vat now has 8 open bubbler lines in it and could easily use another eight. The black tub has a couple of air lines in it too. Check out this pic, the reflection of the pvc pipe laying across the tub looks like a baby's head. You might have to tilt your head a little to the right to get the full effect.
Does anybody else see that, or is it just the effects of some of my former pastimes?
The live rock vat is getting better, but just not quickly enough for me. It still has caramel colored gunk all over the walls and lots of dark green cyano on the rocks. At least it is bubbling and bouncing and rippling.
I pulled an all-nighter and got down to some serious cleaning again. Instead of scrubbing, I just used the handy sprayer from the slop sink to blast off the cyano. It may look like a regular kitchen sink sprayer, but it is hooked directly to 1/2" pipe, not coming through a 3/8" line from a kitchen faucet at partial force. I put some egg crate in the vat also to get the rock off of the bottom. Now if the RODI holds up, maybe I can keep up with scheduled water changes instead of letting the rock sit there for weeks and weeks at a time.
I ran out of room and had to put about 30 pounds on a separate panel on top of all the rest. I have learned some valuable lessons with this live rock. Don't overload the vat (like I did) and don't just pile the rock on the bottom (like I did). It would have been much better if I would have had maybe 200 pounds of rock in there instead of over 400. Of course, if the DI had worked like it was supposed to, and the RO hadn't become plugged with rust, maybe it wouldn't have been an issue. It probably would have been better to set this vat up in my garage or else build a solid shade cover for the vat to keep the direct sunlight off of it too. Nevertheless, any future curing will be done with much less rock, and I'm sure I will have more to learn then also.
About the only thing left to do is take care of this temperature issue. I have been banging heads with tschopp about geothermal calculations, (actually, he did all of the calculating - thanks allot for all of your time). As near as we can figure, this place will ned about a five ton geothermal system when it gets all of the tanks full. I spoke on the phone with Treeman about his geothermal and some other ideas that each of us had been thinking about. I got on the phone with some local HVAC companies to try and figure flow rates, system capacities, pipe lengths, pump sizing, thermostatic controls, etc. A couple of the companies wouldn't even touch it. One said he didn't install enough of the systems to be able to give me an accurate guess but gave me a referral to another company, one I had already called and was supposed to be getting a factory rep involved in the calculations. He says that this time of year, the soil temperatures two feet away from the underground loop measure 90 degrees. He also said he didn't think a system that just circulates and doesn't use a heat pump would be effective. I thought (and so did tschopp, that if the underground loop was long enough, it would work. I talked with another guy who said for his five ton units, he drills five well holes 150 feet deep each, so there is 300 feet of 1" vertical pipe in each hole for a total of 1500 feet underground. They run from a big pump to a 1 1/2" manifold, then to each well hole separately with the 1" pipe. That is also with a heat pump but tschopp guesses if I ran about 3 X that amount of pipe underground, it might be enough. He also says if I can drill deep enough to hit groundwater, it would be more efficient since water transfers heat away from the pipe more efficiently than soil. My groundwater is about 250 feet deep and the HVAC guys tell me it is pretty constant at 54 degrees year round. (But my tap water is still 65 in summer) I have a friend in the well drilling business, (the guy who loaned me his big hammer drill when I was putting my water and electric lines through the cellar foundation), who says he would give me deal on the drilling, but it would still be pretty expensive just to drill the holes and drilling 15 holes around the greenhouse doesn't exactly excite me either. I could probably drill 9 since the holes would be 250 feet deep instead of 150, but at $2 or a little more per foot, it adds up. I could do a horizontal loop myself with the excavator, but it would have to start pretty deep. If the soil heats up to 90 degrees for a two foot diameter around the pipe, the loops would need to be separated by at least four feet if I put multiple loops in the same pit. I could do one long run with a trencher but they are slow, I would be trenching up most of my back yard (again) and it is difficult to make turns with them. It took me seven hours to go 160 (or 180) feet from my house to the greenhouse. I could have my well drilling friend bring his big riding trencher, but then it's back to expensive.
There was also a guy I was emailing with who is talking about climate controlling my greenhouse with geothermal. I think he was trying to get me into a heat pump system so I could use it both summer and winter. He says for every $1,000 I am currently spending on propane, he can cut it to $250. Yeah, that's what I need, an air conditioned greenhouse. HA
I could try using the tap water in a loop instead of the geothermal. I had talked about that with H2OENG and then revisited the idea with tschopp when he told me David was using a tap water chiller on his 900 gallon tank. The water in Robert's is very cheap, but even if I plumb the warm side of the loop to the RO, there will be a considerable amount of waste water and I just don't think I have the drainage capacity for it.
Treeman thinks I should go ahead and set up the evap pads (swamp cooler) in front of the shutters like I had originally planned just to test it and see what that will do. Treeman, you were right, I must have been following the diagonal line for volume down to the temperature reading instead of the vertical line. That is how I got the 30% humidity at 95 degrees. According to that psychrometric chart, (when it is being read correctly!!) for a wet bulb temp at 85, with 70% humidity, the temp can get up to 94 degrees and I should be OK. That might just be enough to say good enough. I already have the materials to DIY the pads so it won't cost me any more than I have already spent. Maybe those pads and the airlift tubes would get me there now that I have the shade cloth on. Since I am a big fan of starting as cheap as possible and then "sneaking up" on the final design, I think that is what I will try. I have to get something going or I will be rehashing all of this next summer.
Hey cseeton, I notice the chart says "sea level". Do the numbers change to any great degree with altitude, or is it just the barometric pressure equivalent of sea level???
I must stand in error about the pool temps as well (seldon). I said a few pages back that I had noticed the pool at 83 (i think). Well, I noticed a few times this summer the pool thermometer was up to 89. I still wonder how much I could cool it down at night with spray (I assume the psychrometric chart would hold true for the pool as well??) or shade it to keep it cooler so it could be a back up plan.