The channels where the water flows through are very thin (in the order of few millimeters), as imposed by the
compact heat exchanger technology in which the solution is based. Thus, these channels are modeled in 1D in the
direction of the flow as presented by Eq. 1. By means of a hydraulic study, it was observed that the turbulent regime
would increase significantly the pressure drop of the system. For this reason, only laminar regime is considered for
the flow , selecting 2 mm as the optimal width of the channels.