Heat-exchangers

Application:

FEMOD d.o.o. manufactures wide assortment of heat exchangers used in processing industrial facilities, electro and petrochemical industries, refineries, as well as heating and cooling and air-conditioning units, etc.

Heat exchangers can be divided into those operating on the principle of change of aggregate state (phase) of fluids such as : evaporators, condensers and reccuperators, and those operating without change of fluid phase.

According to place of mounting, operating mode and purpose, heat exchangers are used as : heaters, coolers, condensers, evaporators, etc.

Manufacture:

Depending on place of mounting and application, heat exchangers are projected and manufactured so as to fully comply with required working parameters by their construction, choice of material and operating mode.

There are various categories of heat exchangers, according to their construction, application, types of fluids, flow directions, number of changes and number of fluid inlets and outlets, used manufacturing material, etc.

Depending on application and types of fluid, heat exchangers are manufactured in shapes of a drum or a box, with smooth or finned tubes and a strong support frame. Customers choose manufacturing materials bearing in mind purity of used fluid and possible chemical reactions between fluids and used material in envisaged working conditions. When using aggressive fluids, a special analysis of chosen manufacturing material should be made.

Depending on fluid flow direction, heat exchangers are made with parallel unidirectional or counter-directional flow, transversal, spiral, or combined flows. According to number of passes, heat exchangers can be with one, two or more, (up to eight) passes through tubes and up to four passes of fluids through interconnecting area.

In its heat exchangers projects FEMOD gives priority to high-finned tubing from its production assortment, manufactured against world renown technology. Apart from low-carbon and stainless steel, most frequently used manufacturing materials for all types of heat exchangers are copper and copper alloys.Therefore heat exchangers offered by FEMOD d.o.o. are distinguished by high quality, endurance, good technical performances, reliable operation and compliance with ever stricter environmental requirements.

Fluids:

Most frequently used fluids in heat exchangers are air, water or oil, and in special cases depending on technical requirements other fluids, (nitrogen, antifreeze, hydrogen, gas mixtures, special technological oils, etc.).

Depending on the choice of fluids, various combinations are possible, such as: water-water, air-water, air-oil, water-oil, oil-oil, nitrogen-water, water-hydrogen, etc.

Examples:

1. High-finned copper tubes grid for water-air radiator Basic tube..................Cu Fins.......................Al Exchange power...... 340 kW Size...2950x1250x450 mm ("US Steel"-Smederevo)
2. Smooth copper tubes bundle for water-nitrogen radiator Exchange power.... 2000 kW Size..Ø1300x3240 mm ("MESSER-Tehnogas"a.d. Niš)
3. Spiral smooth copper tubes bundle for water-antifreeze radiator Exchange power...... 700 kW Size... Ø900x3800 mm ("MESSER-Tehnogas" a.d. Niš)
4. Spiral smooth copper tubes bundle for water-water radiator Exchange power....... 120kW Size....Ø265x1150mm (Valjaonica Bakra a.d. Sevojno)
5. High-finned brass tubes cooling bundle for hydrogen-water radiator Basic tube.........CuZn 37 Fins.....................Cu Exchange power....1900 kW Size..Ø619x3400 mm (TENT "B" Obrenovac)
6. Smooth copper tubes drum-like water-water heat exchanger Exchange power......700 kW Size..Ø436x2400 mm ("Alumina" Skoplje) ("Alpro" Vlasenica)
7. Cooling insert with high-finned brass tubes for additional air-water cooler Basic tube.........CuZn 37 Fins.......................Al Exchange power.....2850 kW Size..Ø1740x1650 mm ("MESSER-Tehnogas" a.d. Smederevo)