Radiant cooling

Bob Gagnon plumbing and heating

And lower the dew point simply by running the cool well water first through a large fan coil unit, then through my radiant system. This removes humidity just like a standard air conditioner, except the well water isn't as cold as the refrigerant they normally use, so the fan coil simply has to be bigger. It works awesome. I think a dewpoint sensor to interrupt the power to the radiant system until the fan coil does its job, would make this system foolproof.
Thanks, Bob Gagnon



<A HREF="http://www.heatinghelp.com/getListed.cfm?id=331&Step=30">To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"</A>

John Pipkorn

Radiant cooling

I did a search and could not find much here on the subject of radiant cooling. I am aware of the system involving cappilary tubing in walls and ceilings, but I am wondering if anyone has any engineering experience with using "in-floor"? I have a customer with a repair shop 75'x70' and he uses the infloor system for cooling much of the summer. I am working on a church proposal and am thinking of this as an option to a bunch of ductwork and air handling equipment. I just know that the engineer I will need to stamp my drawings will probably say that it won't work. Any help would be much appreciated.
Thanks,
John

Derheatmeister

I think it is the people from Danfoss that can help you with this.will find out more for you!Richard from Heatmeister. HM

Pat_11

radiant cooling

The Viega training facility in NH uses radiant cooling. Where are you located and I can put you in touch with a Viega Radiant specialist. May be able to help.

Mike Dunn

radiant cooling

The trick is controlling the dew point. You may still need ductwork and AC to control humidity. The Rehau rep(Michel Sales) in St. Paul, MN uses a form of passive radiant cooling. They buried 3/4" tubing 4' deep under most of their warehouse and just use a circulater to move the fluid to the cool ground loop then through the floor tubing. When there is high load situation they have a humidistat that kicks on the AC when the humidity gets close to dewpoint.

Uponor has design some some active systems using a chiller with the same AC setup.

Geoff McDonell

Radiant cooling

I'm a consulting engineer who designs large scale commercial radiant cooling systems and I'm wondering if you've done a plain old Google search on "radiant cooling design"?

There are numerous radiant cooling control and design sources out there that take you through the basics. As other posters have pointed out - a "total comfort system" consists of radiant heating and cooling, with heat recovery ventilation, and fresh air humidity control as required.

The key is to design the building envelope to keep the cooling loads minimized so you don't need very cool water temperatures to get effective radiant cooling, and therefore stay out of dewpoint ranges. If one can use radiant cooling in the new Bangkok airport (speaking of hot'n'humid climates", well, I think the design issues can be worked out pretty well by now. Heck, a man got put on the moon nearly 40 years ago, you'd think we could figure out how to effectively apply radiant cooling systems.

Unknown

natural cooling

I've been reading up on the subject for a while now but don't yet have any practical experience. I'm going to use our new shop as a test bed this summer though, using a large cistern with a steady flow of icy spring water through it by pumping water through a heat exchanger coupled to the floor heat system and back to the cistern. We have an HRV system to alay any condensation fears, though I think those fears are unfounded as the flow temperatures would be kept around 2deg cooler than the air temp. Here's a good read that breaks it all down into easily digested info. Cooling With Viessmann Heat Pumps (scroll down to the natural cooling part.)

Nick Ciasullo

John,
We did a radiant cooling job for the Comcast building that recently went up in Philadelphia. One item is to make sure your water is not too cold. Cool, not cold. You don't need very cold water to cool off the building.

John Pipkorn

Where are you located

Just wondering what part of the country you work in, may want to use your services?
Thanks,
John

John Pipkorn

Thanks

I am in Milwaukee Wisconsin

GMcD

High priced talent

I'm in Vancouver, BC. Home to close to a dozen large scale radiant cooling systems installations that are currently running just fine. My charge out rates are not for the faint of heart.