Akhyar, Mahmud, Siswo Pranoto, & Muhammad Fadlan Malau.
" Performance Analysis of a Horizontal Axis Spiral Type of Solar Collector Made of Copper Pipe on Solar Energy Absorption." <em>Journal of Ocean, Mechanical and Aerospace -science and engineering-</em> [Online], 69.3 (2025): 259-263. Web. 24 Jun. 2026