Keywords: furnace, vacuum furnace, Vacuum Furnace, Water Cooling, Calculation, Bright Furnace, Vacuum Bright, Resistance Vacuum Furnace, Cooling Water, Water Jacket, Mechanical Pump, Water Cooling Jacket, Seal, Diffusion Pump, Heat Treatment, Industrial Furnace, Resistance Furnace,

Calculation of water cooling systems for vacuum furnaces

　　The water cooling system of the resistance vacuum furnace includes the furnace body and the vacuum system. Its purpose is to take away the heat loss and cool the rubber sealing area to maintain the operating environment at room temperature and protect the sealing area.

　　Cooling can be welded on the wall of a number of coils of water pipe, or made into the entire water jacket jacket, the former must have sufficient heat transfer area, and because of the water pipe is easy to have processing and transportation process of touching the bad, so the cold wall of the water jacket is used more.

　　Vacuum furnace body water jacket including side walls, bottom, top cover, electrodes, observation windows and other external surfaces. The water cooling parts of vacuum system include diffusion pump, water-cooled baffle, water-cooled cap of diffusion pump, booster pump, mechanical pump and so on. The converging copper rows also need water cooling due to the high current.

　　Design of water-cooled set, first according to the part of the radiation or conduction heat loss and the temperature difference between the water in and out of the water volume flow rate, because the water-cooled set has enough heat transfer area, so only require the diameter of the outlet pipe can be.

Vacuum furnace

Weight flow Q

    G=------ [kg/h], Q: heat loss [kcal/h] 

      C*△t

Assuming that the specific heat of water C = 1000 kcal / kg * degrees, in and out of the water temperature difference △ t = 30-20 = 10 degrees.

               G

volume flow rate V = -----, the weight of water Y = 1000 kg / m 3, the

               Y

            ____ 

            √4V 

So the diameter of the pipe d = --------, the flow rate of water W = 2 m / s

             ЛW

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