Thermodynamic performance assessment of a small size CCHP (combined cooling heating and power) system with numerical models

The system performance has been calculated by introducing some performance parameters that have allowed: i) to estimate the efficiency of the primary energy conversion into useful energy EUF (energy utilization factor), ii) to consider the quality difference between cool/heat and work and among heats at different temperatures ExUF (exergy utilization factor); iii) to evaluate the primary energy saving with respect to the separate production of the same energy fluxes TPES (trigeneration primary energy saving).