【Applied Energy最新原创论文】一种用于能源系统中水-能-碳耦合评估的多目标优化方法

Highlights

• A metric, based on utopia tracking approach, for the WEC nexus is proposed.

• Metric allows visualization of synergies and conflicts among WEC nexus elements.

• NLP model for the optimal design and operation of CHP systems is presented.

• Role of thermal storage in CHP systems is analyzed using different configurations.

• Trade-offs between WEC nexus and economic performance of CHP systems are defined.

Abstract

This paper addresses the importance of thermal storage coupled to a combined heat and power systems using a multi-objective optimization approach. A nonlinear programming model is used for defining the size of a combined heat and power unit and thermal storage tank which supply energy utilities to a residential building. Water consumption, direct CO2 emissions generated by fuel consumption as well as global efficiency in energy supply are used as objective functions for addressing the water–energy–carbon nexus. In addition, total annual cost of the system is used for considering the economic performance of the system. Utopia tracking approach is used for defining a normalized approach for conducting an assessment of the economic–nexus performance. Results show the influence of thermal storage in reducing water consumption (15.5%) and emissions (67.5%) as well as improving efficiency (75%) of the system. The multi-objective analysis provides a systematic metric for the assessment of nexus, as well as a strategy for reaching trade-offs among the elements considered as part of the nexus and for identifying system performance limits for resources consumption.

Keywords:

Thermal storage

Multi-objective optimization

Water management

Nexus assessment

CHP systems

Pareto visualization

Fig. 1. Technological structure.

Fig. 2. Optimization and WEC nexus assessment process.

Fig. 3. Multi-objective strategy and nexus assessment.

Fig. 5. Pareto Front - Case 1.

本期小编：张凯；审核人：王潇笛。