DETERMINATION OF FLOW VELOCITY UNDER FREE CIRCULATION OF HEAT CARRIER IN SOLAR WATER HEATING SYSTEMS

• Date: 2025
• Main Authors: Golovko , V., Volodarskyi , V.
• Format: Article
• Language: Ukrainian
• Published: Institute of Renewable Energy National Academy of Sciences of Ukraine 2025
• Subjects: renewable energy sources; solar radiation energy; natural circulation; solar water heater; flow rate; temperature head.
• Online Access: https://ve.org.ua/index.php/journal/article/view/553
• Journal Title: Vidnovluvana energetika

An analytical model for the flow of heat carrier in natural-circulation (thermosiphon) solar water heaters is presented. A differential equation for the flow velocity   is derived, accounting for the gravitational driving head due to density differences between hot and cold fluid a...