Study On The Characteristic Of Far-infrared Radiation Heating Using Hot Fluid

Infrared radiation heating (particularly far-infrared radiation heating) compared with other heating methods can shorten the time of the heating and elevation temperature, and control the spatial distribution of radiant flux and directly heating objects to avoid energy consuming in heating medium. Therefore, infrared radiation heating technology had the advantages of energy conservation and improving productivity efficiency. But the traditional infrared radiation heating consumed the electric energy basically, and energy consumption was enormous. It could greatly improve the utilization of energy if using steam, flue gas and the industry waste gas to produce the infrared radiant energy.In this paper, infrared radiation heating was used hot liquid. The experimental tentative plan of using conduction oil as heat carrier to obtain infrared radiation had been proposed, and the preliminary study had been carried on according to the independently designed equipment. The simulated infrared radiation heating experiment using water as materials had been investigated. The influence of different radiation paint and radiation distance to radiation effect had been studied.The influence of heating system structure and technics parameters in heating process was discussed with the contrast experiment of heating dynamics under different work conditions, and reliable basis to theoretical analysis and calculation of infrared radiation is provided.Two different heating methods which were the irradiation type and immerge type had been used, and the influence of them to material temperature change had been discussed. The respectively applicable scopes of the two methods was got.The total heat transfer coefficient of two different paints were calculated theoretically. The total heat transfer coefficient of non-paint radiant tube was 9.40 W/(m2·K), while that of radiant tube using domestic paint was 11.65 W/(m2·K), so the heat-transfer efficiency had been improved 23.9%. That of radiant tube using Japanese paint was 11.40 W/(m2·K), and the heat-transfer efficiency had improved 21.7%.According to estimating the economic performance approximately, it is showed that using steam heating can save about 13.4% of economic cost comparing to the electrical energy heating. It could conserve energy sources and protect environment if industrial waste gas, such as low-pressure steam and flue gas to produce infrared radiation were made the best of.