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Type: Posts; User: marauderx

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  1. Replies
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    Welcome from another in Maryland.

    Welcome from another in Maryland.
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    That would be me. :) Let me ask more...

    That would be me. :)

    Let me ask more specifically - what was your role in the project? Did you install the geothermal loops, size the piping, pour grout, or size the system? How big? Where? ...
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    Geothermal costs

    Just for the geothermal loop, we are trying to get an idea of the costs for vertical wells.

    Are you looking at $/linear foot, per ton of cooling, or number of wells & depth per well?

    We have a...
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    1. They can be measured in SEER. A lot also...

    1. They can be measured in SEER. A lot also depends on your location, as ground temperatures vary. A typical geothermal system will use a heat pump, so your heat pump equipment performance also...
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    What are your in & out temperatures for the...

    What are your in & out temperatures for the system? The heat pumps may be unable to extract enough heat based on your needs & the temperatures you are facing.

    Also the Geoexchange forums might...
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    Geothermal Commercial experience?

    Who has worked on a geothermal project for a commercial site? What did you do?
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    Have you considered other options besides a...

    Have you considered other options besides a chiller? A small chiller will cost you... with or without the 'fancy' controls. You might want to look at a heat pump instead, or look to irregular...
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    This may be misleading. The Coefficient of...

    This may be misleading. The Coefficient of Performance (COP) = 1, aka 100%. However, the COP for nearly all other systems will be higher, meaning that they will perform better. The electric heat...
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    PPD: Percentage of People Dissatisfied. You will...

    PPD: Percentage of People Dissatisfied. You will never reach 0. You cannot win.

    Or you could carry around a pacifier on a necklace. When people ask you what it's for, tell them it's for all the...
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    Trane has an auto-duct program, but I forget the...

    Trane has an auto-duct program, but I forget the name of it. I think it will size first, then you can tell it some parameter changes and it will recalc pressure, CFM, etc. for you. The program...
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    Actually in our industry, turbulent is good. The...

    Actually in our industry, turbulent is good. The more the fluid in a pipe or the air going over it is sloshing around, the more heat is transferred. Plate & frame heat exchangers are made to be...
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    Changing over your fan coil systems is easier...

    Changing over your fan coil systems is easier said than done. I have seen this once before on an old building in Richmond. They simply hooked up the boiler to the same chilled water loop and...
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    Turn on your faucet a little (one without a air...

    Turn on your faucet a little (one without a air diffuser/strainer). You will reach a point when the water will come out in a clear, straight, predictable line straight down. That is laminar flow.
    ...
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    Efficiency is also a reason. And when there is...

    Efficiency is also a reason.
    And when there is an ammonia leak, people tend to leave before there is a problem.
  15. In November we went with the HP ipaq, which has a...

    In November we went with the HP ipaq, which has a blackberry competitor, as it was cheaper. It has a nice GPS map that includes traffic too. The nice thing is everything the blackberry advertises...
  16. If you want to spend money to save money, how...

    If you want to spend money to save money, how about putting in an enthalpy wheel? It could exchange your sensible & latent loads before hitting the rest of your system, lowering your cooling &...
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    What I've found is that about half the time I had...

    What I've found is that about half the time I had no idea what the guy before me was thinking. I just didn't understand something he'd done right away, and it would get me all worked up. Now I sit...
  18. Thread: SPIRAL DUCT

    by marauderx
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    3,772

    Also look at your temperature differences. Some...

    Also look at your temperature differences. Some engineers look to maintain a ~60F supply air so there is zero chance of condensation. The higher CFM also helps with air changes per hour to satisfy...
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    I've always like the AO Smith. I've seen some...

    I've always like the AO Smith. I've seen some old and some new installed, and it seems they can take hits of cold water and not flinch. To me they are the middle of the road manufacturer.
    See if...
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    Ever heard of Borf?

    Welcome to my neighborhood:
    http://en.wikipedia.org/wiki/Borf
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    Since I'm in HVAC, if it doesn't suck or blow I'm...

    Since I'm in HVAC, if it doesn't suck or blow I'm not interested. That's a fast blow.
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    ...breasts...mmmmmmmmmmmmmmmmmmm

    ...breasts...mmmmmmmmmmmmmmmmmmm
  23. It is an interesting idea. The problem comes...

    It is an interesting idea. The problem comes from trying to extract the heat out and still have a cool server room. You could use a heat pump in both the server room and the rest of the building,...
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    Ya gotta be able to live with loosing the money...

    Ya gotta be able to live with loosing the money ya put on the table.

    We have a poker player in our neighborhood that goes on the tours & such every year. He's won a few major tournaments, and he...
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    It sounds like one of the usual ad-hoc server...

    It sounds like one of the usual ad-hoc server room expansions. 12 pounds of crap stuffed in a 10 pound bag.

    Liebert and Stultz ATS are your two best options. Stultz will likely be cheaper, but...
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    How about not using the dryer and hanging your...

    How about not using the dryer and hanging your clothes up on a rack if it's so dry?

    You could get a mini humidifier for a room if you need to have the humidity at a certain level for something...
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    I think you need to put these factors into a load...

    I think you need to put these factors into a load calc and let it tell you how important each is for each case. I think it will tally the votes in something called 'BTUs'.
  28. Oh my. You need help. You will not learn this...

    Oh my. You need help. You will not learn this fast enough and be comfortable enough with it to get the project done. Every engineer is junior at one time, but the difference and experience from...
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    We're designing stricting around ASHRAE 99.6% and...

    We're designing stricting around ASHRAE 99.6% and 0.4% for the weather conditions instead of 99% and 1% respectively. It gives a little more sway for the number of heating and cooling peaks & hours...
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    Only sissies would buy that bike. A real man...

    Only sissies would buy that bike. A real man would just pound the crap out of him to get it, or if he couldn't, he doesn't deserve such a bad @$$ bike.
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    Yup. Nothing sells the fabric duct better than...

    Yup. Nothing sells the fabric duct better than an architect showing an owner.
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    Yeah, no need to flush or anything unless you...

    Yeah, no need to flush or anything unless you have some real nasty deposits from a system that wasn't cared for in a while.
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    Fire rated?? You fire rate all your other ducts?...

    Fire rated?? You fire rate all your other ducts?

    And how does it kill polar bears? Seems odd it wouldn't kill some fish or squirrels or otters too.

    Fabric ducts are rethinking metal ducts. ...
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    Seal it. Otherwise you get that dark lining...

    Seal it. Otherwise you get that dark lining around it that looks like it was a cheap motel.
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    It's probably pretty tight construction, but...

    It's probably pretty tight construction, but residential varies a lot. You likely have dry air since there aren't too many things giving off moisture and you're loosing moisture via infiltration...
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    Yep, width then height typically. So 12x18 = 12"...

    Yep, width then height typically. So 12x18 = 12" wide by 18" high.
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    Heh, as a former student of Dr. Mumma, I know you...

    Heh, as a former student of Dr. Mumma, I know you can model DOAS systems in Trane's Trace 700 program. It's a bit complicated, but you can nail down your loads from the building vs. OA and have the...
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    Get an engineer. You're calcs are so far off...

    Get an engineer. You're calcs are so far off there is hardly a way to correct them via this forum. Especially with a small commercial project like this with lots of variable latent loads &...
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    I think we got it, as the CTs weren't being rated...

    I think we got it, as the CTs weren't being rated with all the 'extras' it had on it. We had nozzle freezing, but that was running too low.
    Turns out the flow rates weren't set right as there is...
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    We had a guy that left secret "i love you" notes...

    We had a guy that left secret "i love you" notes around the site, like someone on the site was gay & wanted him. He never turned his back to us for about 2 weeks, and he was trying to figure out who...
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    Cooling Tower operation

    We have some Marley legacy cooling towers that we are using with a site near Chicago. The towers are having problems with running free cooling this time of year, for some reason. The towers are...
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    You can measure the airflows from the tiles, but...

    You can measure the airflows from the tiles, but don't anticipate being able to do much else. Jogas is right on this, no matter how bad the Browns are.
  43. Eh, BCS is always skewed toward the SEC even...

    Eh, BCS is always skewed toward the SEC even though half the teams in it lie down for the same big dogs.
    The game of the (new) year will be Penn State vs. USC.
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    Hey, you can look up the Condensation Resistance...

    Hey, you can look up the Condensation Resistance Factor on the internet, which will give you an idea of what to expect.
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    We've had a couple of guys go over at different...

    We've had a couple of guys go over at different times. What they do is string out the work. Once they have qualified people on site, they like to keep you there somehow. As I understand it, you've...
  46. This is putting the proverbial cart before the...

    This is putting the proverbial cart before the horse. It seems like you have a few contractors willing to price out systems for you, so let them price out what a consulting engineer would recommend...
  47. I couldn't agree more. You can only do so much...

    I couldn't agree more. You can only do so much yourself on this. Go get an engineer with experience doing MEP system design to justify which system is best for you and why, using $. Drag him...
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    Ok, thought I'd add to this as well, since I'm...

    Ok, thought I'd add to this as well, since I'm rather experienced with geothermal.

    The head for the pumps should be pretty low, given that the loop is fully closed. ~600' total length + ~100'...
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    You will need to assume a number of days that the...

    You will need to assume a number of days that the economizer will run based on the internal loads, humidity, and days of weather where running in economizer mode makes sense. This is complicated. ...
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    Ground source will get higher EER values. ...

    Ground source will get higher EER values.

    The high EER pays for itself over a long period. Presumably energy prices will stay the same or increase, the cost for the higher EER will pay for...
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