I am currently involved in a university project to produce a domestic water chiller. The unit has a tank of approximately 2 to 3 liters (there is a little flexibility in this). Doesn't sound too difficult yet does it?! However, to keep cost down we are trying to utilise solid state refrigeration (ie thermoelectric) to cool the tank, as appose to a vapour cycle system. The tank is to be cooled to 15C below ambient. Does anybody have any experience of thermoelectric chilling of water or any suggestions? I am familiar with vapour cycle refrigeration but have virtually no experience of thermoelectric systems.