内燃机增压-压缩空气储能冷热电联产系统

doi:10.19799/j.cnki.2095-4239.2020.0150

储能科学与技术 ›› 2020, Vol. 9 ›› Issue (6): 1917-1925.doi: 10.19799/j.cnki.2095-4239.2020.0150

内燃机增压-压缩空气储能冷热电联产系统

杨珍帅(), 王焕然, 李瑞雄(), 陈昊, 张严, 李智搏, 姚尔人

西安交通大学能源与动力工程学院，陕西西安 710049

收稿日期:2020-04-19 修回日期:2020-05-06 出版日期:2020-11-05 发布日期:2020-10-28
通讯作者: 李瑞雄 E-mail:18292877501@163.com;ruixiong.li@xjtu.edu.cn
作者简介:杨珍帅（1995—），男，硕士研究生，研究方向压缩空气储能，E-mail：18292877501@163.com；
基金资助:
国家自然科学基金项目(51676151);陕西省重点研发计划项目(2016MSZD-G-2-17)

A novel combined cooling heating and power system with coupled compressed air energy storage and supercharged diesel engine

Zhenshuai YANG(), Huanran WANG, Ruixiong LI(), Yan ZHANG, Hao CHEN, Zhibo LI, Erren YAO

School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, China

Received:2020-04-19 Revised:2020-05-06 Online:2020-11-05 Published:2020-10-28
Contact: Ruixiong LI E-mail:18292877501@163.com;ruixiong.li@xjtu.edu.cn

摘要/Abstract

摘要：

为解决可再生能源发电系统中存在能源输出的间歇性和波动性问题，基于热力学定律和能量梯级利用的原则，提出了一种内燃机增压-压缩空气储能冷热电联产系统，建立了系统的热力学模型并对系统进行了热力学分析，重点研究了系统中压气机等熵效率及出气压力、透平膨胀机等熵效率及进气压力、换热器效能和内燃机的进气压力对系统性能的影响规律。研究结果表明：在设计工况下，系统的能量效率为86.08%，?效率为59.45%，相对节能率为43.50%；透平膨胀机进气压力对系统的能量效率影响较小，有效改善发电过程中的变工况问题；提高系统中换热器效能和内燃机进气压力可以提高系统的能量效率、?效率和相对节能率。该结果可为系统的工程应用提供理论依据。

关键词: 分布式压缩空气储能, 内燃机增压技术, 冷热电联产, 热力学分析

Abstract:

To solve the problem of intermittent and fluctuating energy output in renewable energy power generation systems, a small-scale combined cooling, heating and power (CCHP) system with compressed air energy storage and supercharged internal combustion engine technology is proposed based on the laws of thermodynamic and the principle of cascade energy utilization. The thermodynamic model of the system is established and the thermodynamic properties of the system are analyzed. The effects of isentropic efficiency and outlet pressure of compressor, isentropic efficiency and inlet pressure of expander, efficiency of heat exchanger and inlet pressure of diesel engine on system performance are emphatically discussed. The simulation indicates that under the design condition, the energy efficiency, exergy efficiency and energy saving rate (ESR) are respectively 86.08%, 59.45% and 43.50%. The inlet pressure of the expander has little influence on the energy efficiency of the system, which effectively improves the problem of variable operating conditions in the process of power generation. Energy efficiency, exergy efficiency and energy saving rate of the system increase with the rising the efficiency of heat exchanger and the inlet pressure of diesel engine in the system. The results provide a theoretical basis for the engineering application of the system.

Key words: distributed compress air energy storage, diesel engine supercharging technology, combined cooling, heating and power, thermodynamic analysis

中图分类号:

TK 02

杨珍帅, 王焕然, 李瑞雄, 陈昊, 张严, 李智搏, 姚尔人. 内燃机增压-压缩空气储能冷热电联产系统[J]. 储能科学与技术, 2020, 9(6): 1917-1925.

Zhenshuai YANG, Huanran WANG, Ruixiong LI, Yan ZHANG, Hao CHEN, Zhibo LI, Erren YAO. A novel combined cooling heating and power system with coupled compressed air energy storage and supercharged diesel engine[J]. Energy Storage Science and Technology, 2020, 9(6): 1917-1925.

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参数	数值
环境温度/^oC	25
环境压力/kPa	101.325
空气绝热系数	1.4
水比热容/kJ·kg^-1·K^-1	4.20
空气质量流量/kg·s^-1	1
压气机等熵效率	0.8
透平膨胀机等熵效率	0.85
换热器效能	0.85
冷凝温度/^oC	30
蒸发温度/^oC	7
储能压力/MPa	7.2
释能压力/MPa	5.0
内燃机进气压力/kPa	283.71

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内燃机增压-压缩空气储能冷热电联产系统

A novel combined cooling heating and power system with coupled compressed air energy storage and supercharged diesel engine

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