الفهرس 
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Abstract
The hybrid solar desalination system is experimentally investigated
during Aug. and Oct. 2020 under the climate of the Egyptian Suez governorate
29.9669°N, 32.5499°E. The investigation is carried out according to
humidification dehumidification methodology (HDH) with hot air stream flow
and cooling system as a condensation unit. The proposed system utilized two
configurations as a humidification technique: a high-frequency ultrasonic
atomizer and a porous-activated carbon tube. The system performance at
various airflow rates, water basin height on the daily production were tested.
The first configuration results of HFUA illustrated that increasing atomizer
number and decreasing water height increases the daily distillate production.
The maximum daily freshwater productivity occurred at six atomizer numbers
with an increase of 38.6% and 115% compared with atomizer numbers four
and two, respectively. Furthermore, water height at 1cm is the most efficient
with increase of 16% and 28.6% compared with 2 cm and 3 cm, respectively.
The optimum hot air stream flow rate is 0.011 kg/s with an increment of
36.88%, 31.07%, 6.48%, 11.72%, 23.52 % and 38.60% compared with 0.009,
0.010, 0.013, 0.014, 0.016, and 0.017 kg/s, flow rates, respectively. The air
mass flow rate has a significant impact on system performance. The system’s
maximum gain output ratio (GOR) is about 1.09. The daily production reaches
7.72 kg\day, the system energy efficiency is 33.84% and 4.85 % exergy
efficiency, and the estimated cost is 0.0112 USD/L. The second configuration
results of PACT revealed that increasing water height Hw enhances freshwater
productivity. The highest distillate yield occurred at Hw = 3cm, with increase
of 13.75% and 5.5 % compared with Hw = 1cm and 2cm, respectively. The
optimal hot air flow rate 0.01156 kg/s with increase of 100%, 38.46%, 15.9%,
and 34.5% compared with varying flow rates of 0.0057, 0.0086, 0.0144, and 0.0173 kg/s, flow rates, respectively. The daily production reaches 6.12 kg, the
system energy, exergy efficiency, and gain output ratio GOR are 26.73% 3.84
%, and 0.83, respectively. The estimated cost is 0.01386 USD/L.
The hybrid desalination system using HFUA enhanced the system
productivity and reduced the distillate cost by about 17.6% and 23.21 %,
respectively, compared with PACT.