{"id":7721,"date":"2020-07-31T14:40:04","date_gmt":"2020-07-31T12:40:04","guid":{"rendered":"https:\/\/www.tempco.it\/blog\/?p=7721"},"modified":"2020-07-31T14:40:04","modified_gmt":"2020-07-31T12:40:04","slug":"hydraulic-passages-in-plate-heat-exchangers","status":"publish","type":"post","link":"https:\/\/www.tempco.it\/blog\/en\/7721\/hydraulic-passages-in-plate-heat-exchangers\/","title":{"rendered":"Hydraulic passages in plate heat exchangers"},"content":{"rendered":"

An information we are often asked for is the size of hydraulic passages<\/strong> in plate heat exchangers<\/strong><\/a>, especially when working with dirty fluids or with particles in suspension<\/strong>.<\/p>\n

The actual trend is to decrease the size of passages, in order to obtain a higher turbulence of fluids<\/strong>, even when working with low flow rates, therefore obtaining a more packed transfer network with multiple crossings and angles. The reason of it is to increase the thermal transfer rate<\/strong>, decreasing the required thermal exchange surface for a certain thermal duty, producing smaller and more efficient exchangers, with lower costs and more competitive.<\/p>\n

But there are some limits, obviously, because when working with dirty waste water, a small passage can be clogged very quickly<\/a><\/strong>. And working in industrial applications, it happens very often, working with not very clean water, some times in open circuit, or even in closed circuits but polluted by the production processes that they serve.<\/p>\n

Brazed plate exchangers<\/strong><\/a> have passage of approx. 2 mm, which is a very small section. But brazed plate exchangers are conceived ad maintenance-free exchangers<\/strong>, except for chemical washing, the so called cleaning-in-place, which is possible only if the exchanger is not completely clogged.<\/p>\n

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