Trigeneration is an advanced energy system that simultaneously produces electricity, heating, and cooling from a single fuel source, maximizing total energy utilization. Also called combined cooling, heat, and power (CCHP), trigeneration captures heat from power generation and uses it to operate absorption chillers for air conditioning.
Technical Details
Trigeneration systems integrate a prime mover, generator, thermal recovery heat exchanger, and absorption chiller (typically 5 to 1,500 tons). Waste heat from the engine (140 to 180 degrees Fahrenheit) supplies the chiller’s generator, producing cooling at 44 to 48 degrees Fahrenheit. Systems achieve overall efficiency of 75 to 90 percent, compared to 45 to 55 percent for conventional separate generation. Electrical efficiency remains 25 to 40 percent, with thermal recovery providing dual heating and cooling output.
Applications and Benefits
Trigeneration optimizes energy use in facilities with significant simultaneous heating and cooling loads, such as hospitals, universities, and data centers. Systems reduce annual operating costs by 25 to 45 percent and carbon emissions by 30 to 50 percent. Implementation requires careful load profiling and absorption chiller sizing to balance thermal production with facility demands.