Performance Analysis of Constant-Pressure Pumped Hydro Combined with Compressed Air Energy Storage System Considering Off-Design Model of Compressor

能源与动力工程(英文) Pub Date : 2021-01-01 DOI:10.4236/EPE.2021.134B002

Xi＇an

{"title":"Performance Analysis of Constant-Pressure Pumped Hydro Combined with Compressed Air Energy Storage System Considering Off-Design Model of Compressor","authors":"Xi＇an","doi":"10.4236/EPE.2021.134B002","DOIUrl":null,"url":null,"abstract":"With the wide application of renewable energy, energy storage technology has become a research hotspot. In order to overcome the shortcomings of energy loss caused by compression heating in compressed air energy storage technology, a novel constant-pressure pumped hydro combined with compressed air energy storage system was proposed. To deepen the understanding of the system and make the analysis closer to reality, this paper adopted an off-design model of the compressor to calculate and analyze the effect of key parameters on system thermodynamics performance. In addition, the results of this paper were compared with previous research results, and it was found that the current efficiency considering the off-design model of compressor was generally 2% - 5% higher than the previous efficiency. With increased preset pressure or with decreased terminal pressure, both the previous efficiency and current efficiency of the system increased. The exergy destruction coefficient of the throttle valve reached 4%. System efficiency was more sensitive to changes in water pump efficiency and hydroturbine efficiency.","PeriodicalId":62938,"journal":{"name":"能源与动力工程(英文)","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"能源与动力工程(英文)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.4236/EPE.2021.134B002","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 3

Abstract

With the wide application of renewable energy, energy storage technology has become a research hotspot. In order to overcome the shortcomings of energy loss caused by compression heating in compressed air energy storage technology, a novel constant-pressure pumped hydro combined with compressed air energy storage system was proposed. To deepen the understanding of the system and make the analysis closer to reality, this paper adopted an off-design model of the compressor to calculate and analyze the effect of key parameters on system thermodynamics performance. In addition, the results of this paper were compared with previous research results, and it was found that the current efficiency considering the off-design model of compressor was generally 2% - 5% higher than the previous efficiency. With increased preset pressure or with decreased terminal pressure, both the previous efficiency and current efficiency of the system increased. The exergy destruction coefficient of the throttle valve reached 4%. System efficiency was more sensitive to changes in water pump efficiency and hydroturbine efficiency.

查看原文本刊更多论文

考虑压缩机非设计模型的恒压抽水蓄能与压缩空气蓄能系统性能分析

随着可再生能源的广泛应用，储能技术已成为研究热点。为了克服压缩空气储能技术中压缩加热造成能量损失的缺点，提出了一种新型恒压抽水蓄能与压缩空气储能系统相结合的储能系统。为了加深对系统的理解，使分析更贴近实际，本文采用压缩机非设计模型，计算分析关键参数对系统热力学性能的影响。此外，本文的研究结果与前人的研究结果进行了比较，发现考虑压缩机非设计模型的当前效率一般比前人的效率高2% - 5%。随着预设压力的增大或终端压力的减小，系统的先前效率和当前效率均有所提高。节流阀的火用破坏系数达到4%。系统效率对水泵效率和水轮机效率的变化更为敏感。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

能源与动力工程(英文)

自引率

0.00%

发文量

922