| 摘要 |
A heat transfer system, in particular a floor heating system, comprises tubes 5 of plastics material arranged in a settable or hardenable material 6 (e.g. a floor finishing layer of cement skim), the position of the tubes being fixed by holding means e.g. 3,4 relative to an underlying structure (e.g. concrete 1 overlaid by a heat-barrier material 2), and the tubes being in the main part of their length of oval or elliptical cross-section. The tube major axis may be normal to (as shown) or parallel to (Fig. 2) the surface of the said underlying structure. The pressure of the heat transfer medium applied to the inside surface of the tubes causes deformation of the tube wall in the regions thereof having the larger radius of curvature, whereby the tubes are force-lockingly applied against the associated surface of the floor finishing layer and heat transfer at these regions is substantially improved. <IMAGE> |
