Soliman, Amina A.  <br/><br/>
Using of solar energy for the operation of a cooling system for the hydroponic in the greenhouses  [electronic resource]. 
 إستخدام الطاقة الشمسية لتشغيل نظام تبريد للزراعة المائية فى الصوب الزراعية 

 - p. 213-234. 
<br/><br/>Includes bibliographic reference. 
<br/><br/> This research aims to study the effect of using the cooling and ventilation system on the production and quality of lettuce <br/>and mint crops in autumn and winter season. Two poly-greenhouse models were constructed at the Agricultural Engineering <br/>Research Institute (AEnRI), Al-Giza Governorate, Egypt (Latitude of 30.02? and longitude of 31.13?( . One of them was <br/>equipped with photovoltaic (PV) system to feed electrical load of greenhouse as cooling and ventilation control system <br/>(treatment) to control, the maximum and minimum temperature to control the interior climate and the other was a traditional <br/>greenhouse (control). The plants were planted in a greenhouse under a hydroponic system. Results of the experimental work <br/>shows that the specific approach of cooling and mechanical ventilation for lettuce and mint crop production enhances the rate <br/>of growth and increasing the fresh lettuce and mint yield by 52.88% and 49.91%, respectively comparing with control greenhouse.<br/> 
<br/><br/><br/>Summary in Arabic. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Greenhouses	--Heating and ventilation<br/>Solar energy