Wieland dry expansion evaporators are engineered to maximize heat transfer while minimizing pressure losses. Internally finned tubes enhance flow boiling behavior, improving efficiency and system stability. A uniform refrigerant distribution system ensures consistent performance across the entire tube bundle.
The robust design allows customization based on project requirements, including material options such as Cu-DHP copper, CuNi 90/10, and 316L stainless steel. With diameters ranging from 194 mm to 660 mm and lengths up to 4085 mm, the evaporators can be precisely adapted to installation space and performance needs.
Optional features such as insulation, electric heaters, pressure gauges, and water filters further support system integration and operational reliability.
In these evaporators, the counter-current configuration optimizes the temperature profile between the two fluids, in order to obtain the maximum local heat exchange coefficient and facilitate the achievement of the desired superheat on suction.
In these evaporators the refrigerant flows in a bundle of U-shaped tubes; the refrigerant connections are therefore on a single head. Optimized for R410A, R32, R452B, R454B or for low temperature operation, the EV.U guarantees optimal mass flows, such as to guarantee oil return even with scroll compressors.
Dry expansion evaporators can also be used in condensing mode, for heat pump and/or refrigerant cycle inversion systems. The good efficiencies and the versatility of configuration make them excellent alternatives where you want to standardize the layout of the exchangers in low and high pressure circuits. Available with design pressures up to 50 bar and temperatures up to 150° C, Wieland Provides heat pumps are in step with the market needs for low GWP refrigerants or natural refrigerants, such as the increasingly used propane.
