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. 2019 Jul 26;5(7):eaax0763. doi: 10.1126/sciadv.aax0763

Fig. 1. Key factors in efficient STD systems.

Fig. 1

The governing equation for distillation-based STD, with the SWP as the performance metric. The impact of three important parameters—solar absorptivity (α), thermal efficiency (ηt), and GOR—on SWP is illustrated. The three thick arrows denote three independent steps: (i) conversion of solar energy to thermal energy by solar absorber, (ii) generation of vapor using the thermal energy, and (iii) production of water from vapor through condensation and latent heat recovery.