Solutherm has brought the impingement technology into perfection, making use of air as a cooling means in an extremely efficient way. This efficiency comes forth from the specific arrangement of small, high velocity air streams by which product surface is exposed to the air stream, yielding high convective heat transfer values which can not be established using air in any other way. The required fan power is furthermore kept at a minimum, by minimisation of the air flow rate.
Impingement cooling and freezing is mainly applicable for thin or loose products, which have to be cooled or frozen at high rates.
Examples:The impingement technology is widely used by Solutherm, for cooling as well as freezing applications. Some examples:
Projectcase coffee freezing
Coffee freezers basically consists of a stainless steel transport belt with impingement freezing modules above and below this belt. Pre-crystallised coffee slurry is pumped on the transport belt, forming a slab with a homogeneous thickness. The slab is subsequently transported through the impingement freezing tunnel, to become entirely frozen. Cold air is hereby brought into intense contact with the coffee surface, to achieve a well defined rate of freezing, yielding:
Impingement freezing applications for the soluble coffee industry have been developed in cooperation with Sandvik Process systems. Sandvik is the global market leader in the manufacture and supply of steel belts and various process machinery, for the chemical and food industry, with a world-wide network of offices and sales representations. Sandvik and Solutherm have contributed to the successful development of the impingement coffee freezing technology each from their own viewpoint and expertise. For more information, see Website Sandvik