A while back I wrote about pressure processing which was driven by the “fresher flavour” of juice that is not heated. Freeze concentration is driven by the same quality concerns and is an alternative to concentration by boiling off water.
Interesting is that the energy needed to melt a kg of ice is several times lower than that required to evaporate a kg of water. In these days of high energy costs and carbon footprints this would seem to be an advantage. However, the freeze concentrator can not be run in mutiple effect plants which allows an evaporator with sufficient effects to use almost the same energy.
Even more disadvantageous, is that the freeze concentrator is often unable to reach the concentration required and a thermal evaporator has to be used as a finisher.