Abstract
For achieving higher energy transferring efficiency from the resources to the load, the Combined Cooling, Heating, and Power (CCHP) systems have been widely researched and applied as an efficient approach. The key idea of this study is designing a novel structure of a hybrid CCHP system and evaluating its performance. In this research, there is a hybrid energy storage unit enhancing the whole system’s operation flexibility while supplying cooling, heating, and power. An ORC system is integrated into the CCHP system which takes responsibility of absorbing the low-temperature heat source for electricity generation. There are a few research studies focusing on the CCHP systems’ performance with this structure. In order to evaluate the integrated system’s performance, investigation and optimisation work has been conducted with the approaches of experimental studies and modelling simulation. The integrated system’s configuration, the model building process of several key components, the optimisation method, and the case studies are discussed and analysed in this study. The design of the integrated system and the control strategy are displayed in detail. Several sets of dynamic energy demand profiles are selected to evaluate the performance of the integrated system. The simulation study of the system supplying selected scenarios of loads is conducted. A comprehensive evaluation report indicates that the system’s efficiency during each study process differs while supplying different loads. The results include the power supplied by each component, the energy consumed by each type of load, and the efficiency improvements. It is found that the integrated system fully satisfies the selected domestic loads and various selected scenarios of loads with high efficiency. Compared to conventional power plants or CHP systems, the system efficiency enhancement comes from higher amount of recovery waste heat. Especially, the ORC system can absorb the low-temperature heat source for electricity generation. Compared to the original following electrical load (FEL) control strategy, the optimisation process brings overall efficiency improvements. The system’s overall efficiency was increased by from 3%, 3.18%, 2.85%, 17.11%, 8.89%, and 21.7% in the second case studies. Through the whole study, the main challenge lies within the design and the energy management of the integrated system.
Highlights
For achieving higher energy transferring efficiency from the resources to the load, the Combined Cooling, Heating, and Power (CCHP) systems have been widely researched and applied as an efficient approach. e key idea of this study is designing a novel structure of a hybrid CCHP system and evaluating its performance
The energy demands are similar, which are 12.92 kWh and 15.98 kWh, respectively. e energy demand of the target residential household has larger energy demand on a winter day than on a summer day. e engine is designed to operate at a shortest time to save energy. e integrated system
Electrical energy demand Energy supplied by the engine Energy supplied by energy storage units Electricity generated by the ORC system Cooling energy demand Heating demand∗ System capacity enhancement Energy consumed by the integrated system Energy consumed by the separate system Overall system efficiency Efficiency enhancement compared to the separate system
Summary
E generator operates with the energy storage units to supply energy for the electrical load. When the electrical demand is fully satisfied, the waste heat recovery system supplies energy for the thermal part and cooling part. The hybrid energy storage units operate to supply electricity, using electrical appliance to satisfying the heat and cooling demand. When the generator is not operating, the energy storage units support the electric loads. Based on the control strategy of this integrated system, most of the recovery system’s operations are settled when the engine is loaded over 60%. It indicates that the error of the recovery system’s model is around 0.2% to 1.75%. Ε is the dielectric constant, E is the electric field intensity, and C is the volume of the supercapacitor
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
