Vapour Condenser From Alfa Laval

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Vapour Condenser From Alfa Laval

Date Added: 4th May 2012

Alpha Laval has a new plate condenser and a world first; the AlfaCond Plate Condenser.

Anywhere there is a need for low-pressure vapour condensing such as in the chemical and food processing industry, the AlfaCond plate condenser now presents a much higher efficiency alternative to the hitherto ubiquitous but bulky indirect shell-and-tube condenser or the direct condensers.

With its floor footprint being of the order of 3 times smaller than its equivalent duty shell-and-tube alternative and its low weight, the AlfaCond Plate Condenser is making rapid inroads into applications such as in ethanol bio-fuel condensing, evaporation crystallisation plant and even condensing exhaust steam from small turbine plants.

In appearance, the AlfaCond Plate Condenser bears a marked resemblance to Alfa Laval's fluid plate heat exchangers used typically for pasteurising milk in dairy processing where efficient heating and cooling and accurate temperature control is vital. Where the difference lies is in the pipe size of the inlet for the medium to be cooled. For the plate heat exchanger, it is similar to that of the medium being cooled. On the AlfaCond, the vapour inlet is relatively speaking, much larger.

Technical Description

The AlfaCond Plate Condenser is constructed from thin stainless steel plate stampings welded in pairs to make a cassette. A number of these cassettes are bolted together with shaped gas-tight gaskets interleaved.

This forms separate chambers, the welded cassette for the vapour to be cooled and the gasketted space in between the welded cassettes carries the cooling medium. Thus the two mediums are separated only by a thin steel plate for efficient heat transfer.

The AlfaCond's layout is specifically designed to cool the vapour with the vapour and as it passes through each cassette, more and more vapour is condensed with the condensed fluid passing back through the vapour cassette chambers at the bottom.

The cooling medium in the alternate cassette with smaller ports is fed in and passed through the labyrinthine spaces in between the cassettes with a higher velocity and turbulence and exits back at the top on the left.

The asymmetric port arrangement encourages a greater vapour residence time and hence it offers unprecedented efficiency for this type of condensing operation.