Abstract
The techno-economic performance evaluation of a combined cooling heating and power (CCHP) system installed in a hospital building in Greece is presented. The aim was to verify performance standards and evaluate real behavior, while highlighting the economic gains. In this research, system performance was evaluated using actual and year-round field measurements. The data were used to calculate the recovered heat and the generated electric energy. Furthermore, the performance was modeled and compared to the manufacturer specifications. Financial assessment was conducted through energy cost analysis to verify the operating viability of the system, both for its heating and cooling functions. The results showed that, overall, after eight years of operation, the energy efficiency was still within design standards. Electrical efficiency was constantly above 30%, while thermal efficiency was around 40–45%. Total efficiency was usually above the 75% threshold, characterizing the system as fully CHP operating. The analysis also pointed out the economic effectiveness of the system in the Greek energy market. The results verified the potential of a CCHP system for improving the energy and economic performance of a building.
Highlights
Laboratory of Process Analysis and Design, National Technical University of Athens, 15780 Athens, Greece; Abstract: The techno-economic performance evaluation of a combined cooling heating and power (CCHP) system installed in a hospital building in Greece is presented
A typical Combined heat and power (CHP) system consists of an engine producing mechanical work to operate a generator, which converts the mechanical work into electricity, while a heat recovery system utilizes the waste heat to meet the thermal needs
The implementation of a CHP system as an energy saving application is in line with the objectives of protecting the environment and securing an energy supply, as is mentioned in the Directive 2018/2001/EC of the European Parliament and of the Council, highlighting the necessity to take measures ensuring that cogeneration potential is further exploited [6]
Summary
Laboratory of Process Analysis and Design, National Technical University of Athens, 15780 Athens, Greece; Abstract: The techno-economic performance evaluation of a combined cooling heating and power (CCHP) system installed in a hospital building in Greece is presented. Financial assessment was conducted through energy cost analysis to verify the operating viability of the system, both for its heating and cooling functions. The results showed that, overall, after eight years of operation, the energy efficiency was still within design standards. The results verified the potential of a CCHP system for improving the energy and economic performance of a building. Combined heat and power (CHP) is defined as “the simultaneous generation of useful thermal energy and electrical and/or mechanical energy from the same initial energy, within a single process” [1]. Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations
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