Heat recovery is a heat exchange process where the focus is on utilising the extracted energy. Cooling the gases is merely a side effect. Depending on the application, the heat can be transferred from gas to gas or to a liquid heat transfer medium. Kühner offers a broad product range for a broad range of applications.
With Kühner heat exchangers, existing heat can be used efficiently at other places - this allows for considerable reductions in the company's energy costs." Heat recovery also makes sense from ecological perspectives, because no fossil fuels are burned to generate the required heat
Kühner plate heat exchangers allow for efficient heat exchange between two gas flows. The gas flows are passed separately through plates in a cross-flow or counter-flow arrangement. The heat is transferred via the contact surfaces. The plate heat exchangers are designed according to the temperature, leak tightness and aggressiveness requirements of the media. The spectrum of applications is broad, ranging from indoor air applications to gas-tight stainless steel heat exchangers for media temperatures up to a maximum of 600°C.
The Kühner circuit distribution system consists of a cooler in the exhaust has flow and a heater in the supply air flow. A constant fluid volume circulates through these two directly connected heat exchangers. The return temperature of one heat exchanger is the inlet temperature of the other one. The Kühner system is optimally balanced and is ideally suited to cases where the gas flows are far apart and the material requirements are different.
Kühner exhaust gas heat exchangers remove heat from a hot exhaust gas flow and transfer it to a liquid medium. Condensation is considered during design of the exhaust gas heat exchangers. Condensation allows for higher transfer efficiency, but results in a greater risk of corrosion due to the water or acids which may form. Potential effects of dust or other particles is also considered in the design.
Kühner economisers are exhaust gas heat exchangers in a functional housing. A bypass routes the exhaust gas past the heat exchanger so that the liquid transfer medium doesn't overheat when continuous heat consumption isn't possible. The heat exchanger is isolated from the exhaust gas flow by dampers, allowing the gas to flow by(pass).