Scraped Surface Heat Exchangers
HRS Heat Exchangers designs and manufactures scraped surface heat exchangers for applications where either one or both of the following problems require special solutions: Fouling causes heat transfer rates to drop and viscous fluids having very low heat transfer rates.
HEAT EXCHANGER FOULING
Fouling is a major problem in heat transfer technology. In the US alone, estimated losses due to fouling are estimated at $18 billion a year. Fouling occurs when fluids degrade near the tube wall and layers of solids deposit or stick to the tube wall. These layers work as an insulator for heat transfer, causing performance to drop. Another form of fouling is crystallisation where, due to cooling or increasing concentration, components in the fluid change to the solid state and deposit on the heat exchanger surface.
To maintain heat transfer high these fouling layers need removal and that is where scraping of the heat transfer surface come in place.
In general, the more viscous the fluid, the lower the heat transfer is. This means that very viscous fluids require a very large heat transfer area. Scraped surface heat exchangers mix the fluid vigorously, which helps to move the fluid to and from the heat exchange surface. This increases heat transfer rates, so the total area required for heat exchange is reduced.
HRS understands these difficult heat transfer applications where fouling and high viscosity cause problems. Two scraped surface heat exchanger solutions have been developed for different types of applications.
Reciprocating Scraped Surface Heat Exchangers – HRS Unicus Series
The patented HRS Unicus Series is a scraped surface heat exchanger for high fouling and viscous fluid applications. It has been specially designed and developed to offer a solution for those difficult heat transfer applications where very viscous fluids are used or fouling appears.Learn More
Rotating Scraped Surface Heat Exchangers – HRS R Series
The R Series is a scraped surface heat exchanger designed for the most difficult heat transfer applications, for example where very high viscosities and highly fouling fluids need heat treatment. Unlike the HRS Unicus Series, where the scraper movement is back and forth, the R Series technology uses a rotary scraper rod. This scraper rod…Learn More
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