Foremost among the options are geothermal, micro-hydroelectric and wind generators. Geothermal Geothermal systems address the need for a comfortable interior environment. The system incorporates a series of pipes or coils, which are buried deep in the ground behind or beneath a home. The pipes are filled with liquid that is circulated to a heat pump, where the heat energy is removed and transferred to the home. The water passes through a nozzle that increases the velocity, then strikes the turbine runner, which is connected to the generator shaft.
Power is generated at a steady rate and stored in a battery bank for later use.
Not surprisingly, the installation cost of a geothermal system is usually around 15 percent higher than the installation cost of a traditional heating system. Over time, however, the saving is substantial. During the winter months, you should save 20 to 70 percent on your heating bill. Summer saving will be less impressive, but could be up to 25 percent. The system can also heat your bath water and save you up to 50 percent in the process.