GUPEX® industrial air⁄air heat exchangers made of glass fibre reinforced plastic (GRP) is a cost effective plate heat exchanger unit with ever improving payback time as energy prices increase, combined with very long economic life.  Gupex AS has developed the technology of heat recovery from polluted and corrosive emission as well as heat recovery from low temperature process air and gas, an area which has been ignored up until now.

PAPER PRODUCTION MACHINE HALL VENTILATION

Large quantities of moist and humid air and steam evaporate from paper production machine into the machine hall during paper manufacturing, from the wire section, the press section and the dryer section. The vapour and steam is corrosive and destructive to all the surfaces in the machine hall onto which it condensates, including concrete constructions, steel reinforcements, factory plant and the paper machine itself.

FLUE GAS DESULPHURISATION IN COAL POWER PLANTS

The GUPEX® gas–to–gas plate heat exchangers are designed for lower range temperature areas of flue gasses from coal fired power station processes.  The air⁄air (gas⁄gas) plate heat exchanger is a very good alternative to the rotating heat exhangers. And with no moving parts, no cross contamination or leakage and with its excellent chemical resistance the plate heat exchanger improves efficiency and pay–back time and reduce the cost.

In arctic and other cold regions the supply air to shaft mines must be preheated prior to use in mining ventilation.  This is typically done with large gas or diesel mine heaters.  In addition air–to–liquid fluid heat exchangers have been  used to recover some of the heat from the extract air.  However this method has a very low inherent thermal efficiency since the exchange air–to–liquid has to happen twice.