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Comment Heat Transfer

A very efficient heat exchanger for very hot applications

By Tetsuo Satoh |

At the end of last year, Mino Ceramics Co. (Nagoya City, Japan; www.mino-ceramic.co.jp) began shipping its first commercial high-temperature heat exchangers, which were developed in a project by Thermal Management Materials and Technology Research Assn. (TherMAT, Tokyo, Japan; www.thermat.jp). Developed with support from the New Energy and Industry Technology Development Organization (NEDO; Kawasaki City, Japan), the heat exchangers can be operated at temperatures as high as 1,300°C, with a heat-recovery efficiency nearly three times higher than existing technology, making them suitable for utilizing waste energy from industrial furnace applications. In addition to incorporating materials that are both highly heat resistant and durable, the new heat exchangers (diagram) feature a hybrid structure of double and multiple cylindrical tubes to enhance surface area and thus, the heat-recovery performance. At a temperature of 1,300°C, the heat-recovery performance of the new heat exchangers is 18–24%, which is almost three times higher than the 5–7% achieved by existing high-temperature exchangers. Mino Ceramics is planning to further enhance the performance of the heat exchangers for temperatures up to 1,500°C, and develop the…
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