Abdullayeva Б., Eralieva А., Amanzholov Т., Tungatarova М. and Aizhulov Д. 2026. SENSITIVITY ANALYSIS AND IMPACT ASSESSMENT OF DESIGN AND OPERATING PARAMETERS ON THE EFFICIENCY OF A FLAT-PLATE SOLAR COLLECTOR IN BTES SYSTEMS. Bulletin of Abai KazNPU. Series of Physical and Mathematical sciences. 95, 3 (Sep. 2026), 7–17. DOI:https://doi.org/10.51889/2959-5894.2026.95.3.001.