In thermal desalination, what impact does decreasing the condenser temperature have on system efficiency?

In thermal desalination, decreasing the condenser temperature generally increases the system's efficiency, but only up to a certain point, after which further reductions may have diminishing returns or even negative impacts. The condenser's role is to condense the steam produced during the evaporation process back into liquid water, releasing the latent heat of condensation. A lower condenser temperature increases the temperature difference between the condensing steam and....