Process cooling units SUK/DV -
Operating temperatures from -100 up to 150 °C
LAUDA heating and cooling systems from the SUK family consist of the modules compressor, pump, expansion tank, evaporator and condenser. For units series DV pump module and expansion tank are removed. Depending on the lowest operating temperature LAUDA use one-stage (down to -35°C) or two-stage compressors (down to -50 °C), cascade switching of two refrigeration systems down to -100 °C for very low temperatures. The condensing of the refrigerant takes place via cooling water or air (-W or -L) with energy conservation being controlled by the infinitely variable and precise cooling water injection valve or variable speed fan control in air cooled applications. If there are several compressors, a sequencing system ensures energy saving, equal-wear, partial load operation.
With an electric heater or steam heat exchanger added, the SUK line can be expanded to make a compact, ready-for-connection heating and cooling system for temperatures between -100 and 150 °C. Additional precooling via in-house brine or air can easily be put into practice with the help of the modular system, and as far as energy is concerned, this often implies economic advantages compared to conventional systems. Some very exothermic processes require the additional cold storage buffer tanks that again are easily incorporated into the LAUDA modular approach.
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