Development and evaluation of optimum installation parameters of combined heat, power, cooling (CHPC) systems for energy efficiency in hospitals

Research on exergy based efficiency analysis is gradually increasing both in Turkey and in the world. Combined Heating, Cooling and Power (CHCP) applications are preferred, which increase both first-law and second-law (exergy) efficiencies. Hospitals are among the best practices for CHCP systems, since they have almost constant electricity, heat, steam and cooling demands.Such systems need to be custom designed for optimal energy savings, pay-back period, minimum emissions and maximum human comfort, indoor air and environment quality. The proposed system should be optimized with the framework of economy, environment-friendliness, and high performance building requirements. In this research, fundamental constraints and calculation methods were recognized for typical optimal design cases.Data sets on an annual, monthly and hourly basis are processed for high accuracy of implemented analysis methods. For economic evaluation, estimations of natural gas and electricity prices that cover the next ten years were carried out. Total savings and pay-back period of investment were computed with the help of these predictions, which were also compared with the previous studies. Different results regarding the pay-back period remained in ±6% band comparatively. It has been concluded that uncertainty in such applications is acceptable.