Optimization Design of Capacity and Operation Strategy for Building Level Distributed Energy System
Abstract Combined cooling, heating, and power (CCHP) system is an effective solution to implement energy-step-utilization, and achieve energy conservation and emissions reduction. In this paper, the energy requirements are obtained by energy consumption simulation on a building and are classified to several subcategories by energy grade of exergy. The CCHP systems include natural gas internal combustion engine, heat recovery system, gas boiler, absorption chiller, and heat exchangers. The economic efficiency, energy efficiency, and environmental benefits are taken in account to establish a multi-objective evaluation methodology. According the energy balance principle, an integrated optimization model of CCHP system is established by the means of non-liner programming (NLP). The optimization model will automatic match the energy demands’ grade and the result will show the capacity of all the equipment and the operation strategy in the whole year. The computational results also prove the integrated optimization method is valid.