Cooling apparatus

A thermoelectric system characterised by a thermoelectric module heat pump having first and second opposed outer faces, the first outer face being relatively cool and the second outer face being relatively hot in use, a manifold defining a volume being attached to at least one outer face of the thermoelectric module, the manifold having a liquid inlet and a liquid outlet and an open face adjacent the at least one outer face of the thermoelectric module so that, in use, liquid flows through the manifold and the at least one outer face of the thermoelectric module is directly contacted by the liquid passing through the manifold, wherein the manifold contains a non-static means arranged for movement relative to the at least one outer face of the thermoelectric module for increasing turbulence in the liquid flowing through the manifold so as to increase efficiency of heat transfer between the thermoelectric module and the liquid.