Heat Recovery
Plate heat exchangers for energy conservation
With energy conservation becoming a major focus for manufacturers, the demand for plate heat exchangers is booming.
A medida que la conservación de energía se convierte en un punto central para los fabricantes, la demanda de intercambiadores de calor de placas está en auge.
Energieeinsparung steht immer mehr im Fokus der Hersteller und so boomt die Nachfrage nach Plattenwärmetauschern.
A
Fig. 2. Plate heat exchangers (PHEs) are key to capturing processing heat and effectively reusing it, either within the processing system itself or by diverting the energy elsewhere.
Photo: Trelleborg AB.
s fundamental parts of many production processes, plate heat exchangers allow the use of what otherwise would be wasted heat. With energy conservation
becoming a major focus for manufacturers, the demand for plate heat exchangers is booming. As fundamental parts of many production processes, they allow the use of what otherwise would be wasted heat. “Heat is generated in all types of processing,”
says Jon Cutler, Trelleborg Sealing Solutions Material Development Manager for Plate Heat Exchanger gaskets. “In less environmentally aware times heat was just pumped out of the processing system and wasted. Tat wasn’t good for energy conservation or the atmosphere.”
Diverting energy
Now this is happening less and less. Plate heat exchangers (PHEs) are key to capturing processing heat and effectively reusing it, either within the processing system itself or by diverting the energy elsewhere. Tey ensure efficient energy use for heating
Fig. 1. Heat exchanger plate and gasket. Photo: Trelleborg AB.
and cooling, minimising overall heat loss and helping protect the environment. Te applications for PHEs are countless.
Originally they were used in the sterilisation and pasteurisation of dairy products, mainly milk. Now, however they are used on ships, to feed heating systems for buildings and in almost every processing plant. Driven by a desire to manage energy better, in the past 10 years the market for PHEs has doubled. “In power stations PHEs make it possible for the steam used for energy production to be diverted into heating offices and homes,” continues Cutler. “On a ship, PHEs mean heat from its combustion engine can be used for air- conditioning and heating. In processing plants, PHEs ensure efficient energy use by recycling heat. When they are employed within a system, the overall heat loss can be extremely low,” he added.
Leak prevention
Te plates within a PHE are sealed with rubber gaskets, preventing the two liquids within a PHE from leaking out or mixing. “Gaskets are critical elements within a PHE and potentially their weakest link,” says Cutler. “Sealing in PHEs is not easy. Temperatures are at extremes, while chemicals are some of the most aggressive processed and pressures are also high.” Trelleborg has been making plat heat
exchangers gaskets for more than 25 years, and customers rely on its material expertise.
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