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Moving bed heat exchanger
Moving Bed Heat Exchangers (known as MBHEs) are widely used in industry, on applications involving heat recovery (providing a high volumetric transfer area) and filtering (avoiding common operational problems in fixed bed or ceramic filters like the pressure drop increase during operation).〔(【引用サイトリンク】url=http://www.academia.edu/2133711/Exergy_optimization_in_a_steady_moving_bed_heat_exchanger )〕
==Construction==
The MBHE is a gravity driven indirect heat exchanger using fine grained bulk material. Media moves along heat transfer surfaces which can be tubes, plates or panels.MBHEs offer the advantages of little external equipment, a compact design, low maintenance cost and low construction costs.〔(【引用サイトリンク】title=Moving Bed Heat Exchangers for Use with Heat Storage in Concentrating Solar Plants: A Multiphase Model )〕
The Moving Bed Heat Exchanger can consist of several heat exchanger modules arranged one above the other. The product leaves the heat exchanger via the discharge bottom and a funnel. The funnel can be equipped with a collecting screw conveyor if necessary. This does not affect the moving bed. A roof-shaped protecting screen can be installed above the heat exchanger modules to keep out agglomerates and impurities that cannot pass safely through the tube packages. Baffle plates can be installed to prevent wear of the protective screen. At the water/steam side, the ends of the heat exchanger packages (ends of the cooling water tubes) are fitted with reversing chambers and sealed with removable end plates.
On the product side, the outer tubes of the heat exchanger packages are equipped with steel plate strips at the sides. Their patented design keeps the product inside the heat exchanger - without the side walls obstructing access to the inside or interfering with the product movement. In addition, doors can be fitted (to protect the environment and the product quality).〔(【引用サイトリンク】url=http://www.grenzebach.com/index.php/eng/technology/process_engineering/thermal_process_engineering/moving_bed_heat_exchanger )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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