Products
Shell-and-tube heat exchanger
Liquid coolers/heaters · Oil coolers · Steam condensers · Steam generators · Exhaust gas heat exchangers
Shell-and-tube heat exchangers are particularly suitable for heat transfer between various liquids and gases – both with and without a phase change. They achieve excellent results in heating and cooling liquids and gases using water, thermal oil, saturated steam and other heat transfer media. The standard series comprises six sizes with heat transfer surfaces from 0.5 to 500 m².
Types
Six types: G, GK, GV, GD, GA and GS.
Type G: shell-and-tube heat exchanger
Universal shell-and-tube heat exchanger for liquids and gases. Various materials are used, up to premium-grade stainless steels with high corrosion resistance. Operating gauge pressures up to 800 bar are possible. The standard series comprises six sizes with transfer surfaces up to 150 m².
Type GK: shell-and-tube condenser
This type is used for heating liquids or gases through condensation of saturated steam, superheated steam or refrigerant. Depending on the application, the steam is on the tube side or the shell side. Several variants in vertical or horizontal orientation with a heat duty of up to 20 MW are available.
Type GV: shell-and-tube evaporator
Type GV is used to cool liquids by evaporating refrigerants, including ammonia in particular. It works with a refrigerant that achieves fast and effective cooling through evaporation. The series includes horizontal or vertical designs with removable or permanently welded tube bundle inserts.
Type GD: steam generator
If you need a shell-and-tube heat exchanger for heating, our steam generator (shell-and-tube heat exchanger type GD) is the unit of choice. The GD series is used for the indirect generation of low- or high-pressure steam. Steam, hot water or thermal oil is mainly used as the heating medium. The mostly horizontal designs are manufactured with the corresponding test certificates depending on pressure and volume.
Type GA: exhaust gas heat exchanger
The GA series is used to recover waste heat from flue gases. The heat recovered from thermal combustion processes and CHP plants is transferred to hot water, thermal oil or, for example, the combustion air. In special applications, the condensation heat of flue gases can also be utilized. This way, you can make good use of the heat from thermal combustion processes and benefit economically.
Type GS: safety heat exchanger
Using double-wall tubes eliminates the risk of the two media mixing. The interspace is filled with a barrier fluid that absorbs thermal expansion and, via a pressure switch, monitors the leak-tightness of the tubes. Any breaches are reported automatically.
Advantages of ETS shell-and-tube heat exchangers
ETS Energie-Technik-Systeme AG has been developing innovative solutions for over 20 years to offer companies exactly the shell-and-tube heat exchangers that match their specific requirements.
Expansion compensation
Designs with U-tubes, floating tube sheet (D type) or expansion joint (K type) prevent thermal stresses in components.
Materials
Shell and covers in steel St37-2, hot-dip galvanized, RILSAN-coated or stainless steel V2A/V4A. Cooling tubes in SF-CU, CuZn20Al, CuNi10Fe, CuNi30Fe or V2A/V4A. Special materials on request.
Removable bundles
The series includes designs with removable or permanently welded tube bundle inserts.
Monitored leak-tightness
For type GS, a pressure switch monitors the leak-tightness of the tubes via the barrier fluid in the interspace. Any breaches are reported automatically.
Design and function
The tubes inside are separated from each other, forming two self-contained circuits. One circuit contains the liquid to be cooled, which is therefore warm at the start. The opposing circuit carries the second medium, at a significantly lower temperature. According to the laws of physics, heat exchange takes place through the surface contact of the tubes. Medium 1 is cooled by medium 2. Shell-and-tube heat exchangers work not only with liquids, but are also used to cool and heat gases. The processes involved are comparable.
The heat exchangers essentially consist of a casing and a tube bundle insert. The casing is a welded construction and includes all connection, joining and fastening elements. The plain-tube bundle to be installed is provided as standard in a two-pass design.
The chosen concept with U-tubes (U design), floating tube sheet (D design) or fixed expansion joint (K design) allows for large changes in length between the shell and the bundle due to thermal expansion.
Technical specifications – shell-and-tube systems
Design parameters for the standard plain-tube bundle series.
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Typical fields of application for this heat exchanger type
Where shell-and-tube heat exchangers are used
Shell-and-tube heat exchangers are highly versatile in their use and are employed in various industry sectors, e.g.:
- Power plant engineering
- Machinery industry
- Gearbox manufacturing
- Chemical industry
- Process engineering
Downloads
Product brochure
Shell-and-tube heat exchanger
Questions & answers on sizing
Useful information about shell-and-tube heat exchangers in plant operation.
What benefits do flue gas heat exchangers offer in waste incineration plants?
ETS Energie-Technik-Systeme AG equips your company with the right exhaust gas heat exchanger and, on request, advises you in advance on the available types and models. Our flue gas heat exchangers are frequently used, especially in waste incineration plants. They enable safe and effective recovery of thermal energy. Since waste incineration releases a particularly large amount of heat, this heat must be recovered to the fullest extent so that the economic benefit is felt quickly. With the flue gas heat exchanger from ETS AG, you are guaranteed to experience this effect.
How does ETS support the selection and delivery of exhaust gas heat exchangers?
Throughout the consultation, costs remain transparent, and you receive fast, concrete proposals. We have specialized in heat exchangers since 1991 and also deliver custom designs promptly.
What advantages do ETS exhaust gas heat exchangers offer in operation?
Our exhaust gas heat exchangers are certified and will therefore noticeably improve your economic performance while complying with all safety regulations. At the same time, the exhaust gas heat exchangers are easy to maintain, and you can always count on service from ETS AG.
Which industries use ETS exhaust gas heat exchangers?
Exhaust gas heat exchangers are of course not only in demand in waste incineration plants, but are used in every industry where work processes generate heat. We have many customers in the food and chemical industries. Companies in power plant engineering as well as the machinery and paper industries also rely on exhaust gas heat exchangers from ETS AG.
How does ETS support the selection of a shell-and-tube heat exchanger?
We offer individual, no-obligation advice on your selection, at attractive prices and with personal support throughout the entire implementation.
Which expansion compensation is suitable for my system?
The U design (U-tube bundle) is excellent for large temperature differences, since each tube can expand freely. For heavily fouling media, the D design (floating tube sheet) is recommended, since its construction allows easier mechanical cleaning of the tube interior.
When should a safety design (double-wall tube) be chosen?
Type GS is required wherever mixing of the two liquids would have devastating consequences. This applies, for example, to lubricating-oil cooling circuits with river-water cooling (environmental protection against oil leaks) or to chemical process engineering with highly reactive chemical combinations.
What is an exhaust gas heat exchanger, and which type does ETS use for it?
An exhaust gas heat exchanger, often simply abbreviated as AWT in German, is being adopted by more and more companies. The units make waste heat from production processes usable instead of releasing it unused into the environment. At ETS, this is type GA: the energy from flue gases of combustion engines, gas turbines or CHP plants is transferred to hot water, thermal oil or directly to the combustion air. Depending on type and material, exhaust gas heat exchangers work with different gases and fuels. Thanks to their flexibility, modern exhaust gas heat exchangers can be integrated into almost any existing industrial plant without affecting the efficiency of the equipment in any way. Using exhaust gas heat exchangers therefore brings the operation nothing but advantages. Many companies use exhaust gas heat exchangers for space heating or water heating. In larger operations, conversion into district heating is also feasible and worthwhile. This creates an additional source of income for the business.
Why is the exhaust gas routed inside the tubes for type GA?
The soot particles in the exhaust gas require a heat exchanger type that can be cleaned mechanically: the gas flow is therefore routed inside the tubes, where the soot can be removed simply by pushing a cleaning rod through them. If condensation heat is also utilized, the material requirements increase – for acidic condensate, high-grade stainless steels are generally used.
What does belonging to the APL Group mean for the manufacture of my unit?
Manufacturing takes place within the APL Group: over 11,000 m² of production area. Sizing, 3D design and project management remain in Tübach. Manufacturing is carried out in accordance with the Pressure Equipment Directive 2014/68/EU; on request, designs to ASME (U-Stamp) are also possible through the APL Group. We clarify which approvals your unit needs at the design stage.
Shell-and-tube heat exchanger type GA or gas/gas heat exchanger type GB – which is suitable for heat recovery?
In the paper or machinery industry, the shell-and-tube heat exchanger type GA is usually recommended. If, however, the task is to recover heat from contaminated or aggressive air, the gas/gas heat exchanger type GB (see special heat exchangers) is the better choice.
Heat exchangers: always the right units for your company
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