Page 127 - tech fest 2025 ב״ש חוברת תקצירים

Book of Abstracts | 2025 Intensive Cooling of a Nuclear Reactor Wall Model Using Aqueous Salt Solutions
ME-A-01
Aviad Bunes; aviadbunes2@gmail.com Afik Yitzhak Edri; afikedri10@gmail.com
Advisors: Dr. Izhak Ladizhensky1, Dr. Gedalya Mazor1, Eng. Avi Amos1 1SCE - Shamoon College of Engineering Be’er-Sheva
The cooling system in nuclear reactors is crucial for the safety of the system itself and its surroundings, as attested by the Fukushima accident in 2011. This project investigates whether spraying aqueous salt solutions can intensify heat transfer by reducing the insulating vapor film. Using a steel wall heated to 600°C and sprayed with magnesium sulfate, calcium carbonate and potassium sulfate solutions, we measure temperatures at multiple points. Preliminary results show up to a 2.5-fold improvement in heat flux compared to distilled water use. These solutions form porous crystalline layers, enhancing contact to promote faster cooling. Ongoing optimization includes droplet size, spray distance, and salt concentrations. These findings may support advanced reactor cooling methods effective under extreme conditions.
Keywords: cooling, heat transfer, nuclear reactor, salt solutions
The Effect of Indirect Solar Drying on Fruit Quality and Moisture Content
ME-A-02
Itay Shitrit; itayshi26@gmail.com Zohar Hadar; zoharhadar32@gmail.com
Advisors: Dr. Merav Arogeti1, Ms. Nataliya Dvoskin1 1SCE - Shamoon College of Engineering, Be’er-Sheva
Fruit drying is a natural preservation method that reduces moisture content, prevents spoilage, and extends shelf life while retaining texture, color, and nutritional value. This project focuses on designing a measurement unit for an indirect solar drying system to enhance the understanding of the drying process. A sensor-based “Arduino” system continuously monitors temperature and humidity, providing data on drying conditions. To evaluate efficiency, we compared natural air drying to the indirect solar drying process. Our results highlight the advantages of controlled solar drying for improving drying rates and overall effectiveness. This study contributes to the optimization, efficiency, and sustainability of fruit drying methods.
Keywords: “Arduino”, fruit drying, indirect solar drying, moisture content, nutritional value
127