TY - JOUR TI - Performance improvements of solar evacuated tube collectors: a literature review AU - Mathukia, M.D. AU - Motwani, D.K.H. AU - Chotai, D.N.J. JO - Journal of Thermal Engineering PY - 2026 VL - 12 SP - 1 EP - 37 DO - https://doi.org/10.47481/jten.0012 ER -