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Tube bundle heat exchangers

- Liquid cooler / heater - Oilcooler - Steam condenser - Steam generation plant - Exhaust gas exchanger

General
Tube bundle heat exchangers are primarily suited for heat transfer between various liquids and gases with or without phase change. Excellent results have been obtained using water, thermal oil, wet steam etc. to warm or cool liquids and gases. The standard series consists of 6 sizes with heat transfer surfaces ranging from 0.5 to 500 m2.

Range of application
Tube bundle heat exchangers have a great versatility in their use and are applied in different branches of the industry, e.g.:

• Power station technics
• Machine industry
• Gear manufacturing
• Chemical Industry
• Process engineering

Design and Function

The heat exchangers consist basically of housing and tube bundle. The housing is a welded construction and includes all connecting, joining and fastening elements. The standard smooth tube bundle to be installed is a two-way model. The exchanger design variation with U-tubes (U-design), the variation with the floating tube base (D-design) or with a fix compensator (K-design) all of them allow for large changes in length between the casing and the tube bundle due to heat expansion.

Materials
The following material combinations are possible (special materials on request):
Casing tube: Steel St37-2, St37-2 galvanised, stainless steel V2A/V4A
Lid: Steel St37-2, St37-2 coated with RILSAN, stainless steel V2A/V4A
Cooling tubes: SF-CU, CuZn20Al, CuNi10Fe, CuNi30Fe, stainless steel V2A/V4A


Type G: Tube bundle heat exchanger

Universal tube bundle heat exchanger for liquids and gases. Depending on the requirements different materials up to maximum quality stainless steels with high corrosion resistance are used. Also operation over-pressures up to 800 bar are possible. The standard series include 6 sizes with transfer surfaces up to 150m2.



Type GK: Tube bundle condenser
GK types are used to heat up liquid or gaseous medium by means of condensation of wet steam, overheated steam or cooling agent. Depending on the application the steam is leaded on the tube side or on the shell side. Different constructions in horizontal or vertical position with transfer capacities up to 20MW are available.



Type GV: Tube bundle evaporator
The GV type is used for cooling of liquids by means of evaporation of cooling agent, especially also ammonia. This series include horizontal and vertical constructions with removable or fixed welded tube bundles.



Type GD: Steam generation plant
The GD series are used for the indirect production of low- or high-pressure steam. They are heated with steam, hot water or thermal oil. These usually horizontal position types are, depending on pressure and contents, produced with the corresponding test certificates.



Type GA: Exhaust gas heat exchanger
For heat recovery of flue gas principally the GA type is used. The recovered heat of thermal combustion processes, of heat and power plants etc. will be delivered to hot water, thermal oil or for example to the combustion air. In special applications also the condensation heat of flue gases can be recovered.



Type GS: Safety heat exchanger
By using a double tube the risk of contact between the two media is eliminated. The space in between is filled with a sealing fluid which absorbs the heat expansion while monitoring the tightness of the tubes. Any leaks can be reported immediately.