The radiator is the heating system of htm (hot water or steam) carried by thermal wall through the radiator to convection style, pass to the indoor air of a cooling device. By radiator cooling, indoor thermal balance of gains and losses in order to maintain the room air temperature required to achieve the purpose of heating. How it works: when the heating system normal operation, the internal surface of the radiator side is temperature higher htm and exterior side is temperature lower indoor air. The following small series will introduce you to five common heat sink, as well as its functional advantages disadvantages in comparison.
1. cast iron radiator
The biggest advantage is corrosion resistant. However, energy consumption, environmental pollution is serious, weight and appearance quality is poor, low bearing capacity, production technology, cavity-sand, did not meet the requirements of energy-saving, environmental protection, has been listed as my current period are phasing out the product.
2. steel-pipe column radiator
Appearance, can be curved, but when you need to make different welded steel tubes, welded closed, and the welding point is not easy to do. At the same time as the curved shape, bend pipes bibian thin, there are risks; pipe column radiator relies on its outer wall with heat transfer tubes, heat transfer area is small, relatively poor heat dissipation.
3. aluminum radiator
With aluminium as raw material, light weight, good heat-but because of aluminum's own characteristics, it is difficult to manufacture, the shape is not easy diversification, high requirements of the home is not easy to meet, the welding process also poses a problem; aluminum soda serious corrosion, boiler and heating systems for steel pipe, in order to protect the system, the General water quality alkaline, aluminum radiator must do internal coating, but internal coating quality is difficult to guarantee. In addition, aluminum and other metals prone electrochemical corrosion, it is not possible with steel products, copper products Asst., and strictly control the water content of copper and iron.
4. copper-aluminum compound radiator
To copper, aluminium two kinds of materials as raw materials, and heating system water contact pipeline for brass, its surface is made of aluminium. Copper is corrosion-resistant, copper-aluminum heat transfer performance. But such products if two material compound is not good, because of the heat transfer performance of two different materials, thermal effects are not necessarily good. At the same time manufacturing process difficult, welding, appearance form is limited, the product quality is also guaranteed. At the same time in the water easy to copper chloride ions form point corrosion; in addition, the sulfate ion the copper sulfide oxidation, the presence of sulfur compounds in water is also the main cause of the corrosion of copper and the welding point formed by welding of electrochemical corrosion potential difference, and copper tube thinner, it easily in the welding point leakage.
5. steel plate radiator
To steel as raw materials, manufacturing time by running water and convective tablets. Walk water component consists of two pieces of roll formed of block steel with welded together, the thermal area, no deformation, easy-to-plate welding. Production technology of cleaning, environmental protection, product appearance, generous, decorative effect is good, high bearing capacity, good heat, which can effectively reduce energy consumption, energy saving, environmental protection requirements. But steel radiator needs in non-heating period full of water and maintenance, but at present, some parts of the heating system to do full water maintenance or man-made causes system maintenance cannot be filled with water.
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