الفهرس 
CHAPTER ONE: INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
In the present study, pilot-scale HDH system was constructed and investigated at different conditions of water flowrate and temperatures. The performance of HDH desalination system was analyzed using traditional energy analysis (first law of thermodynamics) and exergy analysis (second law of thermodynamics). A comparison between energy and exergy analysis also was presented. For solar HDH system, the highest productivity is 3 lit/hr and the highest productivity is 8.8 lit/hr for hybrid HDH system. Energy and exergy analyses were performed for solar heating system. First law efficiency of solar collector is 79.08% and for heat exchanger is 52.81% therefore, the largest energy losses occurred in heat exchanger. Second law(exergetic) efficiency of solar collector was found 2.19% and 55.79% for the heat exchanger so, the largest exergy losses occurred in the solar collectors. Engineering Equation Solver (EES) software was used for investigation of humidifier and dehumidifier effectiveness. Good agreements were obtained between our results and EES software results. The highest humidifier effectiveness was 97.86% and 79% for the dehumidifier. The highest exergetic efficiency of the humidifier was 65.13% and 42.67% for the dehumidifier. The highest exergy destruction was found in the dehumidifier (68.1%) but at maximum saline water flowrate the highest destruction was found in the humidifier (64.9%).