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their use in the pasteurisation of milk . As the years passed and technology was improved , heat exchangers started being made out of several different raw materials to accommodate such things as more corrosive media and conditions . Improvements continued through the 1960s with a better understanding of viscous flows and plate exchangers were first introduced to the oil and gas industry during this time . Reports further state that the 1960s also saw the rapid development in the fields of space technology , industrial activity and sciences – combined with improved developments in production techniques , and so heat exchanger manufacturing improved to supply to a variety of applications as well as size requirements .
Today we find that the possibilities with a fluid ’ s thermal state , be it hot or cold , allow for a vast range of solutions in the world of heat exchangers ( HEX ) - from simple scenarios to complex processing plants with multiple circuits , and even industrial processing feeding large district systems as seen in several countries around the world .
The technology and design methodology in the various HEX types has therefore continued to develop to offer appropriate solutions for many applications – even insofar as the use of magnets to actively change the geometry inside the exchanger which can produce significant improvement and control of liquid flow or distribution in micro-channel forms . Here a lot of research and development has been pursued at university-levels in the US and UK owing to the growth of these ranges .
In South Africa , a unique HEX design was developed over the Covid pandemic period for the storage of vaccines at
© RACA Journal | Benjamin Brits
A great example of the various forms of heat exchangers – cooling tower , condensing units , thermal storage and air handling unit .
ultra-low temperatures and charged with helium gas that can operate independently from any power source – thus making it a perfect stand-alone solution that can also be used in remote areas and easy air freight as light weight storage per capacity . This technology was covered extensively in Cold Link Africa at the time .
Based on the rising demand from various industries and along with an increasing focus on improving efficiency standards , international analysis shows that it is expected that the HEX market will continue to grow exponentially over the next years .
Much of this growth is owed to the favourable conditions in several emerging economies that aim to establish or expand on their manufacturing capabilities – as well as the expected www . thermofin . de
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www . refrigerationandaircon . co . za RACA Journal I January 2023 29