الفهرس 
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Abstract
Energetic performance of a thermo-solar greenhouse was suggested, developed and investigated represent fish hatchery system. The developed system was mainly consisted of a double cover greenhouse coupled with solar collector and heat exchanger for water heating. The main aim was to control the water environment, namely temperature and dissolved oxygen, of a fish (Nile Tilapia) hatchery at the desired levels. In addition, a simulation model system to predict the temperature-fish basin and the degree of greenhouse air temperature was developed. The results indicated that an efficient control in water temperature and quality. The achieved corresponding value of air temperature rise inside the greenhouse was 8.4°C. The average value of overall thermal efficiency of the solar collector was 40%. The average value of total daily water energy gained from the heat exchanger was 18.185 MJ/ day per m2 of water surface area at an average value of 13.433 MJ/ (m2.day) of the incident solar radiation on the horizontal plane. Based on their operating time the weekly average percentage of energy contribution of both greenhouse action and heat exchanger operating times were 58.13% of the whole operating time and the rest which is 41.87% was accomplished by the heat exchanger system. The average temperature and dissolved oxygen concentration of water pond throughout the whole experimental period were 26.8 (SD = 0.15) °C and 7.62 (SD =0.68) ppm respectively. The average of fingerlings production rate was 115 eggs / female hatched by almost 63.9%. A good agreement between the predicted and observed fish pond water temperature and air temperature inside greenhouse was achieved. The difference between the predicted and observed water temperature ranged from -0.02 to 0.55 ºC. The difference between the predicted and observed air temperature inside greenhouse ranged from -5.59 to 0.0.36 ºC.