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Possibilities and limitations of radiant floor cooling.

Author(s) : OLESEN B. W.

Summary

To evaluate the usefulness of radiant floor cooling, it is important to take into account comfort, cooling capacity, control, and design. One limiting factor is the floor surface temperature. Another one will be the dew-point temperature in the space. The heat exchange coefficient between a cooled floor and the room is typically around 7 watts/m2.deg C, where 5.5 watts/m2.deg C is radiant heat transfer. In spaces with occupants who are mostly seated, the upper comfort limit for the operative temperature in summer is 26 deg C. This means that a maximum cooling capacity for a floor system is about 5 watts/m2.deg C. In several spaces, where there will often be a lot of direct sunshine on the floor, the cooling capacity is significantly higher and may reach 100 to 150 watts/m2. The cooling capacity, however, also depends on the floor construction, distance between tubes, water flow rate, and floor covering. The influence of these parameters is discussed.

Details

  • Original title: Possibilities and limitations of radiant floor cooling.
  • Record ID : 1998-1848
  • Languages: English
  • Source: ASHRAE Transactions.
  • Publication date: 1997
  • Document available for consultation in the library of the IIR headquarters only.

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