{"title":"多因素耦合优化跨临界二氧化碳热泵的热回收效果","authors":"","doi":"10.1016/j.ijrefrig.2024.07.018","DOIUrl":null,"url":null,"abstract":"<div><p>In the background of energy shortage and climate change, transcritical CO<sub>2</sub> heat pump(HTP) technology has attracted lots of attention because of its energy-saving and environmentally friendly advantages. In this research, an experimentally verified simulation model of transcritical CO<sub>2</sub> HTP is established to investigate multi-factor coupling optimization of heat recovery effectiveness(<em>η</em><sub>IHX</sub>). First, the coupling optimization mechanism of <em>η</em><sub>IHX</sub> and discharge pressure(<em>p</em><sub>dis</sub>) is analyzed. Moreover, this research explores the influence of <em>η</em><sub>IHX</sub> on heating capacity, power consumption, discharge temperature(<em>t</em><sub>dis</sub>), and internal heat exchanger(IHX) cost, and further proposes a comprehensive heat recovery index to optimize the above factors. Based on this index the optimal heat recovery effectiveness(<em>η</em><sub>IHX,opt</sub>) for each operating condition is obtained. Also, a failure boundary for the coupling optimization of the <em>η</em><sub>IHX</sub> is also indicated. In addition, the optimal discharge pressure(<em>p</em><sub>dis,opt</sub>) prediction correlation for different <em>η</em><sub>IHX</sub>s is proposed, which can be used for heat recovery effectiveness collaborative optimization control. Finally, a general method for evaluating IHX is provided. Taking Xi'an as an example, the optimal heat recovery area(<em>A</em><sub>IHX,opt</sub>) of this HTP system is 0.42m<sup>2</sup>, with which the optimized HTP system operates safely at extreme operating conditions, resulting in an annual lucre of 1,211 CNY.</p></div>","PeriodicalId":14274,"journal":{"name":"International Journal of Refrigeration-revue Internationale Du Froid","volume":null,"pages":null},"PeriodicalIF":3.5000,"publicationDate":"2024-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Multi-factor coupling optimization of heat recovery effectiveness in a transcritical CO2 heat pump\",\"authors\":\"\",\"doi\":\"10.1016/j.ijrefrig.2024.07.018\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>In the background of energy shortage and climate change, transcritical CO<sub>2</sub> heat pump(HTP) technology has attracted lots of attention because of its energy-saving and environmentally friendly advantages. In this research, an experimentally verified simulation model of transcritical CO<sub>2</sub> HTP is established to investigate multi-factor coupling optimization of heat recovery effectiveness(<em>η</em><sub>IHX</sub>). First, the coupling optimization mechanism of <em>η</em><sub>IHX</sub> and discharge pressure(<em>p</em><sub>dis</sub>) is analyzed. Moreover, this research explores the influence of <em>η</em><sub>IHX</sub> on heating capacity, power consumption, discharge temperature(<em>t</em><sub>dis</sub>), and internal heat exchanger(IHX) cost, and further proposes a comprehensive heat recovery index to optimize the above factors. Based on this index the optimal heat recovery effectiveness(<em>η</em><sub>IHX,opt</sub>) for each operating condition is obtained. Also, a failure boundary for the coupling optimization of the <em>η</em><sub>IHX</sub> is also indicated. In addition, the optimal discharge pressure(<em>p</em><sub>dis,opt</sub>) prediction correlation for different <em>η</em><sub>IHX</sub>s is proposed, which can be used for heat recovery effectiveness collaborative optimization control. Finally, a general method for evaluating IHX is provided. Taking Xi'an as an example, the optimal heat recovery area(<em>A</em><sub>IHX,opt</sub>) of this HTP system is 0.42m<sup>2</sup>, with which the optimized HTP system operates safely at extreme operating conditions, resulting in an annual lucre of 1,211 CNY.</p></div>\",\"PeriodicalId\":14274,\"journal\":{\"name\":\"International Journal of Refrigeration-revue Internationale Du Froid\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":3.5000,\"publicationDate\":\"2024-07-21\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"International Journal of Refrigeration-revue Internationale Du Froid\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0140700724002585\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, MECHANICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Refrigeration-revue Internationale Du Froid","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0140700724002585","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
Multi-factor coupling optimization of heat recovery effectiveness in a transcritical CO2 heat pump
In the background of energy shortage and climate change, transcritical CO2 heat pump(HTP) technology has attracted lots of attention because of its energy-saving and environmentally friendly advantages. In this research, an experimentally verified simulation model of transcritical CO2 HTP is established to investigate multi-factor coupling optimization of heat recovery effectiveness(ηIHX). First, the coupling optimization mechanism of ηIHX and discharge pressure(pdis) is analyzed. Moreover, this research explores the influence of ηIHX on heating capacity, power consumption, discharge temperature(tdis), and internal heat exchanger(IHX) cost, and further proposes a comprehensive heat recovery index to optimize the above factors. Based on this index the optimal heat recovery effectiveness(ηIHX,opt) for each operating condition is obtained. Also, a failure boundary for the coupling optimization of the ηIHX is also indicated. In addition, the optimal discharge pressure(pdis,opt) prediction correlation for different ηIHXs is proposed, which can be used for heat recovery effectiveness collaborative optimization control. Finally, a general method for evaluating IHX is provided. Taking Xi'an as an example, the optimal heat recovery area(AIHX,opt) of this HTP system is 0.42m2, with which the optimized HTP system operates safely at extreme operating conditions, resulting in an annual lucre of 1,211 CNY.
期刊介绍：
The International Journal of Refrigeration is published for the International Institute of Refrigeration (IIR) by Elsevier. It is essential reading for all those wishing to keep abreast of research and industrial news in refrigeration, air conditioning and associated fields. This is particularly important in these times of rapid introduction of alternative refrigerants and the emergence of new technology. The journal has published special issues on alternative refrigerants and novel topics in the field of boiling, condensation, heat pumps, food refrigeration, carbon dioxide, ammonia, hydrocarbons, magnetic refrigeration at room temperature, sorptive cooling, phase change materials and slurries, ejector technology, compressors, and solar cooling.
As well as original research papers the International Journal of Refrigeration also includes review articles, papers presented at IIR conferences, short reports and letters describing preliminary results and experimental details, and letters to the Editor on recent areas of discussion and controversy. Other features include forthcoming events, conference reports and book reviews.
Papers are published in either English or French with the IIR news section in both languages.
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