In this paper, an effort has been made to evaluate the convective heat transfer coefficient and mass of water evaporated from a single slope passive solar still for different water depth (0.01, 0.015, 0.02 and 0.025 m) by various thermal models like Dunkle's model, Chen et al.'s model, Clark's model, Adhikari et al.'s model, Kumar and Tiwari's model, Zheng Hongfei et al.'s model and Tsilingiris model. These models were studied and compared with the experimental work. Also, the energy and exergy efficiency were calculated and the percentage deviation between experimental and theoretical prediction also listed out. The experimental validation of energy and exergy efficiency using different thermal models was carried out at Chennai, Tamil Nadu, India. By comparing the theoretical values of the hourly yield with the experimental data it was found that Dunkle's, Chen et al.'s model and Tsilingiris model gave better conformity between the forecasted and experimental results. Kumar and Tiwari's model yield is very high where as Clark's model, Adhikari et al.'s model and Zheng Hongfei et al.'s model predicts lower values as compared with the experimental results.
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