Radiant Floor Cooling
While this makes sense in some cases delivering cooling from the ceiling has several advantages.
Radiant floor cooling. The cost up charge is minimal potable water rated tubing stainless or brass circulater and few other hardware items. Of course it all starts with the load calculations from which the design water temps for doing it solely with the floor can. Cooling the ceiling is usually done in homes with radiant panels. Although potentially suitable for arid climates radiant cooling is problematic for homes in more humid.
Radiant cooling cools a floor or ceiling by absorbing the heat radiated from the rest of the room. The circulating water only needs to be 2 4 c below the desired indoor air temperature heat is removed by the water flowing in the hydronic circuit once the heat from different sources in the space is absorbed by the actively cooled surface ceiling. Radiant cooling slabs use similar design and sizing principles as a hydronic radiant floor system using the same types of pex pipes manifolds and pumps as in heating. Radiant floor cooling radiantec has promoted open direct radiant floor heating that also has a limited cooling capacity.
Chilled water between 55f to 58f is circulated through the pipes which are embedded in either floor or ceiling. Panels must be maintained at a temperature very near to the dew point within the house and. Cooling the ceiling is usually done in homes with radiant panels. Under optimal design conditions capacities of a floor system up to 16 btu h ft can be achieved with more typical capacities in the 8 to 12 btu h ft range.
Most important studies in usa by lawrence berkley national laboratory in california estimate the energy saving of radiant floor cooling to be over 30 of traditional forced air cooling. Radiant cooling from a slab can be delivered to a space from the floor or ceiling. Incoming cold water from the homes well is directed through the radiant tubing prior to reaching the tap. Radiant cooling systems typically use chilled water running in pipes in thermal contact with the surface.
Radiant cooling cools a floor or ceiling by absorbing the heat radiated from the rest of the room. Radiant cooling ceiling or wall panels is more effective per square foot than radiant floor cooling due to the stratification issue with cold floors pooling the cool air near the floor rather than convecting to the air. Radiant cooling is quiet dust free efficient and has been used in europe for decades. Homes built on concrete slabs are prime candidates for radiant heating systems and radiant floor cooling takes advantage of the same principle using chilled water.
The capacity of a radiant cooling system depends on factors such as insulation pipe spacing floor construction and indoor air temperatures. Aluminum panels suspended from the ceiling through which chilled water is circulated. Radiant cooling systems have been embedded in the ceilings of adobe homes taking advantage of the thermal mass to provide a steady cooling effect.
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