Passive solar water heaters don't have pumps to move hot and cold water around. They come in two distinct variations: integral collector-storage systems and thermosiphon systems. Passive solar ...

Let’s have a closer look at both the types. Passive solar water heater: A passive solar water heater is a system that uses solar energy to heat water without relying on pumps or other mechanical ...

Researchers at Thailand’s Vidyasirimedhi Institute of Science and Technology demonstrated a novel hydrogel that has high ...