GPHE plate technology Plate-and-frame heat exchangers are designed to optimize heat transfer because the corrugated plates provide by far the greatest surface area through which the heat can be drawn from one gas or liquid to the other. Despite this substantial area for heat transfer, plate heat exchangers are usually relatively compact. The design of the plate channels also ensures maximum turbulence as each fluid passes through. This results in maximum efficiency in transferring heat from one medium to the other. Plate design The heat-transfer surface The heat exchanger plates are pressed in a so-called herringbone corrugation pattern. When two plates are superimposed with opposing herringbone patterns, this type of corrugation generates a helix-like flow with very high turbulence, thus producing the essential condition for achieving high transfer coefficients and effective heat exchanger self-cleaning. By changing the plate corrugation pattern, the heat exchanger can be used in different processes, even those with very dirty media.

The distribution area The plate distribution is pressed in a chocolate pattern (an Alfa Laval design feature). This type of corrugation has numerous advantages: • Optimizes flow distribution over the entire transfer surface, ensuring highest energy efficiency • Dead spots, that are the main cause of corrosion and fouling, are eliminated • Reduced maintenance cost and increased uptime New plate technology Distribution area design - CurveFlow The new design of the CurveFlow distribution area means superior flow distribution and more of the available pressure drop over the main heat transfer area. This results in a number of benefits: • A more compact heat exchanger – less plates needed • Increased energy efficiency – better flow distribution reduces the risk of fouling build up, reducing the need for increased pumping power to compensate for higher pressure drop • Reduced maintenance costs – fewer plates mean faster cleaning and low cost for spares Up to 15% higher efficiency With the new CurveFlow design the media is more optimally distributed over the entire plate width. Additionally, the cross corrugation pattern between the distribution surface and the main heat transfer area gives improved heat transfer.

Compared to a traditional plate design, it's also possible to use thinner plates at high pressures. Total improvement of the heat transfer efficiency is up to 15%.

PHE Impact is a free-cooling payback analysis program for ARI-certified plate heat exchangers. The interactive program calculates the payback time. High performance heat transfer In Alfa Laval’s plate heat exchangers (PHEs), the two media are separated by a thin, corrugated plate. The rule is the thinner the plate, the more efficient and more uniform heat transfer, the better the process control.

Higher flow capacity Thanks to the non-circular ports, the port area in the plate has increased compared to a conventional circular design. This equals to higher flow capacity at the same velocity, allowing higher utilization. Up to 40% improvement in self-cleaning capability The media will have up to 20% higher velocity at the far end of the plate width. This will improve the shear stress over the heat transfer area by up to 40%, minimizing the risk of fouling build-up at the most critical part of the plate. Perpendicular corner guiding The new corner guiding design ensures that the plate pack is perfectly aligned independent of the number of plates. A perfect alignment ensures a reliable performance of the heat exchanger and faster closing of the unit after service. To learn more about the new plate features.

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Special plates Double-wall plates Double-wall gasketed plate heat exchangers are ideal for use with fluids that must not be allowed to mix. Pairs of identical plates are laser-welded around the ports. The gasket is installed in the conventional manner and the welded plate pairs are assembled in a plate pack in the same way as ordinary single plates. In the unlikely event of leakage through a plate because of a puncture or crack, the leaking fluid will never come into contact with the fluid in the other circuit, as it will be stopped by the double plate and flow outside the heat exchanger. WideGap plates With wide channels free of contact points, this plate is ideal for fluids containing fibers or coarse particles.