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Mathematics 2021, 9, 33 10 of 31 Reference [48] Description A hybrid humidification-dehumidification desalination system operated through a waste heat recovered from a vapour compression refrigeration based on a household air-conditioning unit is presented. The heat rejected from the condenser in the form of heated air is utilized to drive the desalination unit. The heat and mass transfer characteristics of various components were simulated using TRNSYS and experimental validation is also carried out. The authors have presented a review article focusing that desalination market has greatly expanded in recent decades and expected to continue growing in the coming years. This study reviews some of the most promising desalination techniques including humidification-dehumidification desalination powered by a solar energy resource. The review focuses on water sources, demand, availability of potable water, and purification method. Table 1. Cont. It is concluded that the average maximum freshwater produced using the waste heat from the vapour-compression refrigeration system for hot and medium (pre-monsoon) climatic conditions were 4.63 kg per hour and 4.13 kg per hour, respectively. The freshwater production rate is higher during the summer season as the ambient air has lower relative humidity and higher temperature. Finally, the economic analysis has indicated that the cost of freshwater produced from the integration is around $0.1658 per kilogram. It is concluded by the authors that desalination seems to be a reasonable and technically attractive option towards the emerging water-energy scarcity problems. The authors have mentioned that cheap freshwater can be produced from brackish, sea, and ocean water by using solar panels, wind turbines, along with other emerging renewable energy technologies. The authors have mentioned that the HDH system has some advantages for a small-scale decentralized water production which includes simpler brine pretreatment, disposal requirements, and simplified operation and maintenance. It is recommended that a multi-effect closed-air-open-water water-heated system is the most energy efficiency. The authors have also proposed several methods to improve the performance such as water heating and innovative ways of atomization (misting) of the hot water. Findings Location of the Analysis Chennai city (12.98◦ N latitude, 80.17◦ E longitude), Southern India Demonstration Dates of the Analysis Months of March and May. Gaps with the Current Work The configuration, research design, analysis procedure, findings, and conclusion of this work are completely different from the one proposed by Santosh et al. [48]. The recovered waste heat in the work of reference [48] is attained to drive the solar desalination unit from a vapour-compression refrigeration cycle. However, the emphasis of the waste heat recovery is quite different in the case of the current work. [49] The work of reference [49] is a review work and doesn’t quantitatively describe the performance indicators of any desalination plant which is making the current work unique in its novelty.PDF Image | Humidification Dehumidification Solar Desalination System
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