Technological Research of a Clean Energy Router Based on Advanced Adiabatic Compressed Air Energy Storage System

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.

Exergy analysis and particle swarm optimization of clean energy router based on a solar‐thermal‐assisted advanced adiabatic compressed air energy storage system

“…Some main simulation results can be compared between AA‐CAES in [5] and hybrid adiabatic compressed air energy storage (HA‐CAES) in Table 8. First, the RTE and EXE for each system are 95.5% and 55.9%, respectively.…”

“…The energy analysis of the ST‐AA‐CAES under the first law of thermodynamics. It demonstrates the coupling of various components and the energy conversion process [5]. The outlet temperature of the compressor $$T_{c,i}^{out}$$ is followed by: $$$$\begin{equation}T_{c,i}^{out} = T_{c,i}^{in}\;\left( {1 + \frac{1}{{{\eta _{com,i}}}}\left( {\beta _{c,i}^{\frac{{k - 1}}{k}} - 1} \right)} \right),\end{equation}$$$$where $${\eta _{com,i}}$$ represents the adiabatic efficiency of the i‐th stage of the compressor, $${\beta _{c,i}}$$ is the i‐th stage of the compressor pressure ratio and k is the adiabatic index, and which is estimated by $$$$\begin{equation}{\eta _{com,i}} = \frac{{{h_{out,s}} - {h_{in}}}}{{{h_{out}} - {h_{in}}}}\;,\end{equation}$$$$where $${h_{in}}$$ and $${h_{out}}$$ are outlet and inlet enthalpy, respectively.…”

“…The energy analysis of the ST-AA-CAES under the first law of thermodynamics. It demonstrates the coupling of various components and the energy conversion process [5]. The outlet temperature of the compressor T out c,i is followed by:…”

“…Because of the irreversible heat loss of the process of heat transfer, HEX of TUR and HEX of AC have relatively more exergy destruction of the CER. Some main simulation results can be compared between AA-CAES in [5] and hybrid adiabatic compressed air energy storage (HA-CAES) in Table 8. First, the RTE and EXE for each system are 95.5% and 55.9%, respectively.…”

“…The power can be stored through specific mediums and then the stored energy should be released to generate power when the demand for the power grid increases. The electric energy storage system is one of the schemes for large-scale utilization RE, which is an effective approach to improve the efficiency, safety and economy of the conventional power system [5]. At the same time, large-scale energy storage system is a necessary part of smart grid, distributed energy generation and microgrid technology.…”