Abstract
The behaviour of a distillation module of a desalination unit coupled with hot water storage tank heated by a solar collector field is investigated by a series of simulation, in order to increase productivity of the desalination unit. Mathematical models are developed to give the ability to estimate the expected performance of the system under given climatic conditions, allowing the choice of the proper design solutions in relation to the desired usage. The whole investigation is based mainly on experimental data under real usage conditions.