Trigeneration or trigen is the simultaneous production of mechanical power (often converted to electricity), heat and cooling from a single heat source such as fuel or solar energy. As with cogeneration, the "waste heat" byproduct that results from power generation is harnessed, thus increasing the overall efficiency of the system. Trigeneration can also refer to systems involving the production of Electricity, Heat/Cold AND some Product (mainly chemicals) Details Usually space heating and hot… (More on Trigeneration)