[BLDG-SIM] Radiant Floor Heating System

Virdi Permana vpermana at emsi-green.com
Fri Apr 20 09:54:57 PDT 2007


Hello All,

It was suggested that convective floor heating system using zone placed
baseboards could be used to model Radiant floor heating if the floor/room
temp delta is low so the main mode is convection (typical) and the piping is
placed near the surface (also typical).

1. Is temp delta of 10 deg F acceptable? I learn that typically the floor
temperature is 85 deg F for radiant floor heating system. 

2. I understand that doe-2 does not allow a primary to secondary loop heat
exchanger - it assumes the loop-to-loop heat transfer

is via a valve and fluid flow ... where in the real radiant floor system
(typically) the boiler water is hot flow low with a heat exchanger with the
separate floor loop with higher flow and lower T (typically just a few
degrees above the desired room T rather than 150-180 degF). So in this case
a higher flow loop in doe-2 with the total pump head/flow set to get the
total pump power is tricky. What is the typical number on this? I have a
1273 sqft detach house and 3670 sqft 8 units apt.

Any help is greatly appreciated.

 

 

Virdiansyah "Virdi" Permana

EMSI

Energy Analyst

(202) 291 3102 T

(202) 291 3107 F 

 



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