View Single Post
Old 08-29-14, 11:41 AM   #7
AC_Hacker
Supreme EcoRenovator
 
AC_Hacker's Avatar
 
Join Date: Mar 2009
Location: Portland, OR
Posts: 4,004
Thanks: 303
Thanked 723 Times in 534 Posts
Default

Quote:
Originally Posted by Mikesolar View Post
Their rules of thumb are mass, mass and mass, tighter spacing for tubing and lower temps...
As I mentioned, this presentation was about low-mass and low-temp options.

As far as I can tell, not having your wealth of experience, the high mass solutions work best for conditions where it gets cold and stays cold, with more gradual variations in heat load.

As you surely know, with low-mass emitters, the buffer tank becomes the thermal mass, and when temps change rapidly, the heating system is able to adjust to those changes.

My interest is more in ultra high efficiency (fossil fuel is not part of the picture), which would call for ultra low feed temps, so heat load reduction (massive insulation) and maximizing radiant area seem to be the answer to this. Low mass or high mass makes no difference to me personally.

There are issues with optimum flow rate and distribution optimization that I have not come to grips with yet.

BTW, I just asked him why he did give significant mention to already existing low mass high efficiency floor options in his presentation... I'll share that with you when the answer comes in.

-AC
__________________
I'm not an HVAC technician. In fact, I'm barely even a hacker...
AC_Hacker is offline   Reply With Quote
The Following User Says Thank You to AC_Hacker For This Useful Post:
buffalobillpatrick (09-10-14)