pics of commercial hydro air

tim smith

Brad, & whoever else. The coils were sized for 600 mbh each at 160 degree entering water at od design and 60 degree entering air. Airflow is appx 10000cfm per air handler. The boilers will be in condensing mode most of the time at our avg od winter temp here in Seattle. set for 20 degree delta t. 50 gpm per coil. I set up the reset curve pretty steep on boilers as this is really for space tempering not space comfort so we need full output at appx 30 degrees out. Tim

tim smith

Pics of commercial hydro air, Tim

Here is some pics of larger hydro air system for tempering air for old 50,000 sft cemetary building. Aaron, our lead installer is in one, he did a stellar job on this. Tim

Brad White_185

NICE Job!

Aaron has his hat on but everyone else ought to take theirs off... Nice tin work and I particularly like the coil offsets.

What temperatures are you running? Air and BTU capacities? Tell us more about this. Those 4-row coils are great extractors especially when piped counter-flow.

50,000 foot cemetery building? Who or what needs that kind of space?
Ought to be comfortable. Talk about The Grateful Dead.

john_83

Great job on the install just wondering if you guys were thinking of swithcing to press it would of saved you a whole lot of time. Again though great job.

tim smith

Regarding Press fitts

John, We slaughter fast and I figure the cost of fittings vs the time savings, I don't think I am any ahead to speak of IMHO. Thanks for the comments and the heads up. Tim

Brad White_185

Tim, you might

just might try to reduce your flow a bit and see what happens toward improving your condensing range. You can cut your flow by 50 percent and still get about 90 percent of your initial capacity, you know.

Cutting the flow in half only shifts the average water temperature in your case by ten degrees but your return comes back 40 degrees cooler rather than 20 degrees. You may have enough "fat" in your calculations to cover any paper deficit.

Just a thought.

mtfallsmikey

Nice!..and a question for Brad

Good metal/piping work...as for not using Pro-Press, my tenant just added some Leiberts on a glycol system, sez no way they use that on glycol..had read all of the stuff on here about it! (small world!) And, a question for Brad, in parallel with the thread on chilled water... does the same coil design criteria apply for a heating hydro-coil as well as cooling?

Brad White_185

If you mean counter-flow

then yes, you will get more capacity out of a counter-flow piped coil that one piped the other way. You do not notice as much capacity drop-off as with chilled water because the temperature differences to start with using hot water are much wider.

More to the point, with chilled water, the temperature differences are fairly narrow, water to air.

With the greater use of low temperature water systems however, this too can change in the industry, with similar temperature difference above rather than below the coil entering air temperature. Thus counter-flow will take on a greater importance even though you should be doing it anyway right now.

Does that make sense? I have not had my coffee yet.

tim smith

Thanks Brad, I will take a look at that. Tim