Heat conduction process of integral finned tube

Heat conduction process of integral finned tube-Glorytubetech

In order to reduce the thermal resistance on the airside and the bottleneck effect on the airside of the integral finned tube, various measures may be taken in the design of the heat exchanger. The method is to add fins on the outer surface of the airside, that is, use finned tubes. The finned tube expands the original heat transfer area on the airside, compensates for the low heat transfer coefficient on the air side, and greatly increases the heat transfer. The greater the temperature difference required for the transfer of unit heat of the finned tube, the greater its thermal resistance will become, and its thermal resistance is equal to the reciprocal of the heat transfer coefficient, indicating that the larger the overall finned tube heat transfer coefficient, the smaller its thermal resistance, On the contrary, the smaller the heat transfer coefficient, the greater the thermal resistance. The heat transfer coefficient of the airside of the fin tube is smaller than that of the waterside, so the thermal resistance of the airside is greater than that of the waterside, which becomes the main thermal resistance affecting the heat transfer of the whole fin tube, making the airside become the heat transfer coefficient. The bottleneck of the thermal process limits the increase in heat transfer

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Principle of rail clamp design

Principle of rail clamp design rail clamp design The rail clamp design has several functional features: 1. Adjustability: The adjustable length is 15mm, and its adjustability functions include: (1) The rail presser is easy to install, saves time, and has high precision (2) The track can be adjusted if the structure of the support beam is slightly changed. 2. Anti-loosening: Under the action of the lateral force of the track, through the force analysis of the welding RTYB, a part of these lateral forces are transmitted to the bottom seat through the upper cover plate as the pressure of the bottom edge to seat on the upper cover plate. The other part is the lateral friction between the base and the upper cover. Since the wedge-shaped action between the base and the upper cover plate is converted into the tightening force of the bolts, it has an anti-loosening effect. 3. Self-locking: The three pieces are self-locking together through the interaction of the upper cover, the base, and the

steel chamfer / triangular steel bar supplier from China- Glroysteelwork

steel chamfer / triangular steel bar supplier from China- Glroysteelwork Steel chamfer is manufactured from cold drawn steel and can be welded or bolted into place to provide relief from sharp edges to reduce chipping and spalling.Steel chamfer is available in three sizes: 10mm*10mm15mm*15mm20mm*20mm25mm*25mm Glorysteelwork is an professional manufacture of cold drawn, we have many years export experiences and long term cooperation clients. Materials: SS400/A36/Q235B Length:4000mm or as required Contact Us E-mail： info@glorysteelwork.com Whatsapp：86 15036167067 Mobile: 86 15036167067 Skype: karenwu7067

What is rail creep

What is rail creep rail creep Rail creep is also known as line crawl. The creeping phenomenon of the rail along the longitudinal direction of the line. With the increase in railway transportation tasks, the impact of the wheels on the rails when the train is running accelerates the creep of the rails. Rail creep can cause many diseases of the line. In order to prevent the occurrence of track creep diseases, it is necessary to find out the real cause of creeping in order to effectively eliminate the problem. There are two different manifestations: the rails move along the soft sleeper surface due to insufficient fastening pressure of the fasteners; the longitudinal movement of the row is caused by insufficient ballast bed resistance. The reason for this is the longitudinal force of the rail caused by the wheel rolling and longitudinal slip, train braking, the change of rail temperature, and the creep caused by the deflection and deformation of the rail under the action of the wheel load

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