STAGE #2: A SOLAR-POWERED BOILER

摘要

Why use natural gas or oil to heat your home's water supply when the sun can do it for free? The big boiler in the sky lays down 100 watts of power across a single square foot. The simple solar-powered hot-water system that I've built from scratch will put these free watts to work on the rooftop of my new eco-conscious home. Once I get it installed, it will generate about 450 gallons of hot water a day, plenty for my family of four, while consuming half the amount of energy of a conventional hot-water system. Plus, it will fuel my home's radiant heating system, a series of polyeth ylene pipes built into the floor thatrnuse hot water to warm the house.