The homogeniser is also equipped with a
cooler, attached in a helical line along the inner casing
of the homogeniser. Cooling is facilitated by cold tap
water. The whole inner surface is thoroughly insulated,
including the end lids, which are neither heated nor
cooled. The heat transfer is therefore influenced by the
heat conductivity of the wall material only (stainless
steel). In order to increase the homogeneity of the heat
transfer, the space between the cooler, heating coil and
the inner wall is filled with aluminium wool.
The homogeniser was filled by approximately one
half of the chamber volume. The product temperature
was measured by a Ni1000- sensor installed on a spreading blade near the heat-exchange wall.