Abstract
Choosing a distributed energy system (DES) is a multi-criteria decision-making problem. Decision-makers should not only consider the cost of the system, but also consider the energy efficiency and environmental protection of the system. In order to help decision-makers choose the best DES, this paper designs seven different DESs based on specific examples, using five criteria: investment cost, operation cost, primary energy consumption, primary energy utilization, and yearly CO2 emission. Additionally, three methods of super-efficiency Data Envelopment Analysis (DEA), Technique for Order Preference by Similarity to an Ideal Solution (TOPSIS), and Complex Proportional Assessment (COPRAS) are used to evaluate the system priority and analyze the sensitivity under different decision-making scenarios. The results show that when decision-makers only consider cost factors, traditional systems are the best choice. However, renewable energy systems are the best choice when decision-makers consider energy efficiency and environmental protection rather than cost. Among them, the photovoltaic storage system is the best system in many decision-making scenarios, because of its comprehensive advantages in cost, energy efficiency, and environmental benefit. Simultaneously, the system’s prioritization of different decision-making methods is different. In this paper, according to the Spearman correlation index test, the results achieved from TOPSIS and COPRAS are relevant and feasible.
Highlights
IntroductionA distributed energy system (DES) is based on the concept of energy cascade utilization, distributed on the demand side to achieve the comprehensive utilization of resources and renewable energy
In this paper, according to the Spearman correlation index test, the results achieved from TOPSIS and Complex Proportional Assessment (COPRAS) are relevant and feasible
A distributed energy system (DES) is based on the concept of energy cascade utilization, distributed on the demand side to achieve the comprehensive utilization of resources and renewable energy
Summary
A distributed energy system (DES) is based on the concept of energy cascade utilization, distributed on the demand side to achieve the comprehensive utilization of resources and renewable energy. According to the different needs of the demand-side energy-users, a DES aims to achieve the effective supply of energy, minimize the loss of transportation links, and maximize the efficiency of energy utilization. China has a vast territory, and increasingly more power users are scattered around the country. The centralized supply of energy is difficult and the cost is high; a DES can effectively achieve demand-side management, reduce load peak-valley difference, reduce power supply costs, and bring about a revolutionary impact on the traditional way to supply energy [1]. With the development and maturity of different energy technologies, increasingly more technology is becoming available.
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