| 摘要 |
<p>1501084 Radiators for space heating or cooling or for utilizing solar heat IMPERIAL CHEMICAL INDUSTRIES Ltd 23 Jan 1975 [7 Feb 1974 15 Jan 1975] 05638/74 Headings F4S and F4U In a heat exchanger comprising tubular headers (such as 11, 12, Fig. 3) interconnected by a hollow board 10 comprising a plurality of through channels (such as 23), the headers and the hollow board each consist of a plastics extrusion in which the plastics material is a highly crystalline polyolefin of the type which can be made using transition metal polymerization catalysts. The plastics material may, e.g., be polypropylene or a high density polyethylene. The headers preferably are secured to the board by a bead (e.g. 55, Fig. 6) of compatible thermoplastic material. The board 10 may be generally flat or it may be curved. For decor or functional reasons the plastics material may be coloured, e.g. black. Or the surface thereof may be painted, lacquered, or coated with a metal (e.g. copper) foil. In use, the heat exchanger may comprise a radiator for space heating or cooling; or it may be used as a solar radiation collector. In the radiation collector shown in Fig. 4, the heat exchanger 30 is mounted above thermal insulation 35 in a wood or foamed-plastics tray 31 with a glass window 34, the heat exchanger being connected to a hot-water storage tank. Fig. 10 shows another radiation collector wherein the extrusion is formed as a trough of parabolic shape, most of the solar rays directly received being concentrated by reflection from the surface 104 on to a collector 103 providing a high-temperature heat source. Indirect radiations from cross-reflections are transmitted to the fluid flowing in the extrusion channels 108 and this provides a low-temperature heat source. In another radiation collector described (Fig. 9) the channelled heat exchanger extrusion is an annulus. Curved reflectors (95, 96) direct the collected radiation on to the black outer surface of the annulus. Torroidal headers (not shown) are connected to the ends of the heat exchanger fluid channels.</p> |
