Combined Heat and Power (CHP): Technical Performance, Environmental Impact, and Integration in District Heating Systems

Combined Heat and Power (CHP), also known as cogeneration, is an energy-efficient technology that simultaneously produces electricity and useful thermal energy from a single fuel source. Unlike conventional systems that reject a significant portion of fuel energy as waste heat, CHP systems recover and utilize this thermal energy, thereby improving overall fuel utilization. This article evaluates the thermodynamic working principle, technical performance, environmental impact, and integration of CHP within district heating networks. A simplified numerical example demonstrates that CHP systems can achieve total efficiencies above 80% and reduce primary energy consumption by approximately 30% compared to separate generations. The findings confirm that properly designed and optimized CHP systems represent a technically viable and environmentally beneficial solution for modern energy systems.