Abstract

As a fundamental infrastructure of energy supply for future society, energy Internet (EI) can achieve clean energy generation, conversion, storage and consumption in a more economic and safer way. This paper demonstrates the technology principle of advanced adiabatic compressed air energy storage system (AA-CAES), as well as analysis of the technical characteristics of AA-CAES. Furthermore, we propose an overall architectural scheme of a clean energy router (CER) based on AA-CAES. The storage and mutual conversion mechanism of wind and solar power, heating, and other clean energy were designed to provide a key technological solution for the coordination and comprehensive utilization of various clean energies for the EI. Therefore, the design of the CER scheme and its efficiency were analyzed based on a thermodynamic simulation model of AA-CAES. Meanwhile, we explored the energy conversion mechanism of the CER and improved its overall efficiency. The CER based on AA-CAES proposed in this paper can provide a reference for efficient comprehensive energy utilization (CEU) (93.6%) in regions with abundant wind and solar energy sources.

Highlights

  • With the continuous growth of global energy production and consumption as well as the exhaustion of traditional fossil fuels, posing a great threat to the survival and development of mankind, the development of renewable energy (RE) has become a common challenge facing the world

  • The modeling and operation based on the adiabatic compressed air energy storage system (AA-compressed air energy storage system (CAES)) system mainly assumed that air is an ideal gas and satisfies the ideal gas state equation, and that the specific heat capacity of air for the heat transfer medium and the heat storage medium are constant

  • The CCHP system requires the combustion of natural gas and the consumption of electric energy, which brings a large amount of carbon emissions

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Summary

Introduction

With the continuous growth of global energy production and consumption as well as the exhaustion of traditional fossil fuels, posing a great threat to the survival and development of mankind, the development of renewable energy (RE) has become a common challenge facing the world. In order to obtain the optimization of the network distribution in different regions and the allocation of comprehensive energy (cooling, heating, and electricity), a clean energy router (CER) with various energy conversion and routing functions could be a core link to realize energy interconnection, shared production, and distribution. To the EI, the aim of the integrated energy system can act as the large-scale development of RE to realize the significant improvement of energy utilization efficiency Their ultimate purpose is to solve the problems of a sustainable energy supply and environment [9]. This paper proposes a clean, safe, and efficient CER based on the energy storage system (ESS), which can improve the comprehensive energy utilization (CEU) rate and can meet various energy demands.

AA-CAES System
The Working Principle of AA-CAES
Compound CAES
Coupling
Schematic
Thermodynamic
Heat Exchanger Module
Heat Exchanger on the Compression Side
Heat Exchanger on the Expansion Side
Thermal Storage Module
AST Module
Turbine Module
Energy Flow Analysis and Conversion Mechanism
Heating Energy Produced
Overall Energy Storage Efficiency
Simulation and Results
Charging Process
Discharging
The Whole System Operation Process
Temperature and pressure pressure variation variation of of the the AST
Conclusions
Full Text
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