Water is the secret of life. People demand more and more water. Solar stills generate distilled water. The present project involved designing and evaluating a heat exchanger-connected solar collector and solar still system. The effects of nanofluids on solar collector performance and solar still productivity were studied. Hybrid and mono ZnO/WO3- water nanofluids have been produced in two steps. Individual and mixed nanofluids have a volume concentration of 0.035%. Four hybrid nanofluids with varying ZnO and WO3 concentrations were examined. Nanofluid stability has been established. The thermal conductivity of nanofluids increased by 5.18–24.8%. The thermal optical efficiency of the solar collector was 0.708, with energy removal parameters of 34.888. The heat removal factor was raised to 0.8 for mono ZnO nanofluid. At a concentration of 0.035%, ZnO/water nanofluid can produce 3.14 kg of distilled water daily. The solar still's total efficiency, including pump consumption, was 39.9% for mono ZnO and 36.4% for WO3. The highest efficiency received for hybrid ZnO + WO3 nanofluids were 37.6%, 37.9%, 38.6%, and 39.2% for ZnO 0.01% + WO3 0.025%, 0.015% + WO3 0.022%, 0.025% + WO3 0.015%, and 0.025% + WO3 0.01%, respectively. As the ZnO percentage rose in hybrid ZnO + WO3 nanofluids, energy absorption, thermal conductivity, solar still productivity, and efficiency were promoted.
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