A. Mustikaningtyas, S. Sihana, E. Wijayanti, and N. Riyandi, “THE PIPE DIAMETER EFFECT ON HEAT TRANSFER OF HELICAL COIL HEAT EXCHANGER IN THE SOLAR WATER HEATER STORAGE TANK”, J. Din. Vok. Tek. Mesin, vol. 9, no. 1, Apr. 2024.