. AKHYAR. Increase the Heating Capacity of Solar Water Heaters by Placing Paraffin in Copper Tubes under Two Conditions. New Approaches in Engineering Research Vol. 8, [S. l.], p. 1–15, 2021. DOI: 10.9734/bpi/naer/v8/10427D. Disponível em: https://stm.bookpi.org/NAER-V8/article/view/2266. Acesso em: 3 jul. 2026.