Study on compound parabolic concentrating vaporized desalination system with preheating and heat recovery

Yingxu Chen, Xu Ji, Guanchao Lv, Yicong Jia, Bianfeng Yang and Jingyang Han

Energy, 2023, vol. 276, issue C

Abstract: This paper proposes a compound parabolic concentrating (CPC) vaporized desalination system with preheating and heat recovery. In the preheating and CPC heating subsystems, the water and heat-conducting oil are respectively employed as the working medium. The seawater is heated by circulating water and heat-conducting oil in the heat exchangers, thereby preventing collector corrosion. The latent heat recovery of the steam improves the energy utilization rate, and the spraying of the feedwater onto the vaporized plate enhances the heat and mass transport and the vaporization efficiency. The influences of the feedwater temperature and ambient temperature on freshwater production under various levels of solar irradiance are illustrated by calculation. The system freshwater production, heat loss, heat efficiency, and heat recovery efficiency are experimentally explored. The preheating and heat recovery increase the average inlet temperature of the CPC heating subsystem to 60.6 °C, thereby an energy savings of 6720.68 kJ/d. The maximum hourly production and the daily freshwater production of the system is 4.55 kg/h and 15.72 kg, respectively. The average heat recovery utilization rate of the system is 0.39.

Keywords: Desalination; Solar energy; Preheating; Heat recovery; Compound parabolic concentrator (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:276:y:2023:i:c:s0360544223010137

DOI: 10.1016/j.energy.2023.127619

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