Radiant Ceiling Cooling

[buffalobillpatrick]

http://www.oorja.in/wp-content/uploa...antcooling.pdf

"Unlike most cooling systems in California, which circulate cold
air to maintain comfort, most radiant cooling systems circulate
cool water through ceiling, wall, or floor panels. “Coolth” from
that water is then absorbed by occupants and interior spaces
according to the dynamics of thermal radiation. These radiant
cooling systems, which are popular in Europe, are rarely found
in California buildings, however. That’s bad news for building
owners and occupants, because radiant cooling systems are
more efficient, more comfortable, more attractive, and more
healthful than systems that circulate air. Over their lifetimes, they
are also less expensive to own and operate.
Given these advantages, radiant cooling is poised to make a big
splash in California markets in all climate zones. Currently, there
are two important barriers to its entry into these markets: a lack
of familiarity with radiant cooling technology and lingering
memories of moisture control problems experienced by a few
pioneering systems installed decades ago. The latter barrier
should be mitigated by recent advancements in sensor and con-
trol technology. The first barrier, local industry unfamiliarity, will
probably diminish as information becomes more widely avail-
able about successful applications in Europe, North America,
and California. Healthcare facilities, which especially benefit
from the way radiant cooling systems separate comfort cooling
from ventilation functions, may lead the way."

Seems like a good match for a Water-to-water Heat Pump.
I know that ceiling would have to kept above the Dew point.
Would need dehumidifiers.

I got the Dew Point Arduino sketch working that A/C linked to in another similar thread.