Tips & Warnings. 1  Use an epoxy resin spray on cured pieces to cover indents or other imperfections. 2  You can also buff out imperfections with plastic polish and a buffing stick. 3  If air bubbles form in the mold, blow gently on them to pop them. 4  Wear gloves and work in a well-ventilated room.f it does show an indentation, leave to cure for an additional 1 to 2 days. Turn the mold upside down and lightly tap the back until the the resin piece emerges. Spread the resin pieces out on a sheet of wax paper and leave them to finish curing for an additional 12 to 24 hours before buffing or mounting.
1.0 Passive Solar Design Introduction. Solar energy is a radiant heat source that causes natural processes upon which all life depends. Some of the natural processes can be managed through building design in a manner that helps heat and cool the building. The basic natural processes that are used in passive solar energy are the thermal energy flows associated with radiation, conduction, and natural convection.
Solar thermal (ST) is one of the most cost-effective renewable energy systems. Solar thermal water heating systems collect the sun's energy in the form of thermal or heat energy. The system can save a major portion of your utility bill. This solar thermal system will cost about $4,600 US (with the price decreasing all the time). 2  A solar pool heater, popular and practical, is an open loop system. 3  It's called this because water circulates back into the pool, which is (of course) an open system.