{"title":"基于卡利纳循环的低温热源利用供热发电联合系统的热力学和经济分析","authors":"","doi":"10.1016/j.tsep.2024.102904","DOIUrl":null,"url":null,"abstract":"<div><p>The Kalina cycle is effective for recovering and utilizing low-temperature heat sources, but it suffers from low efficiency. In order to enhance energy conversion efficiency, this paper proposes a novel combined heating and power system that integrates the Kalina cycle with an ammonia-water absorption refrigeration cycle. This system uniquely recovers all wasted heat to generate heating capacity, achieving 100 % thermal efficiency. Detailed thermodynamic and economic models are developed, based on which a performance optimization is conducted and shows that the new system generally outperforms the Kalina cycle with an exergy efficiency of 34.47 % and a payback period of 2.31 years. Further performance analysis reveals that turbine power output significantly impacts economic performance, and most exergy destructions occur in the heat exchanger-type equipment. Finally, a parameter sensitivity analysis explores the effects of seven key variables on system performance. Results indicate that increasing the ammonia concentration of the basic solution and turbine inlet temperature, while decreasing the turbine inlet pressure, improves the exergy efficiency of system. An optimal ammonia concentration of the ammonia-strong solution is identified for achieving the shortest payback period.</p></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":null,"pages":null},"PeriodicalIF":5.1000,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Thermodynamic and economic analysis of a Kalina cycle-based combined heating and power system for low-temperature heat source utilization\",\"authors\":\"\",\"doi\":\"10.1016/j.tsep.2024.102904\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The Kalina cycle is effective for recovering and utilizing low-temperature heat sources, but it suffers from low efficiency. In order to enhance energy conversion efficiency, this paper proposes a novel combined heating and power system that integrates the Kalina cycle with an ammonia-water absorption refrigeration cycle. This system uniquely recovers all wasted heat to generate heating capacity, achieving 100 % thermal efficiency. Detailed thermodynamic and economic models are developed, based on which a performance optimization is conducted and shows that the new system generally outperforms the Kalina cycle with an exergy efficiency of 34.47 % and a payback period of 2.31 years. Further performance analysis reveals that turbine power output significantly impacts economic performance, and most exergy destructions occur in the heat exchanger-type equipment. Finally, a parameter sensitivity analysis explores the effects of seven key variables on system performance. Results indicate that increasing the ammonia concentration of the basic solution and turbine inlet temperature, while decreasing the turbine inlet pressure, improves the exergy efficiency of system. An optimal ammonia concentration of the ammonia-strong solution is identified for achieving the shortest payback period.</p></div>\",\"PeriodicalId\":23062,\"journal\":{\"name\":\"Thermal Science and Engineering Progress\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":5.1000,\"publicationDate\":\"2024-09-16\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Thermal Science and Engineering Progress\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2451904924005225\",\"RegionNum\":3,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENERGY & FUELS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Thermal Science and Engineering Progress","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2451904924005225","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
Thermodynamic and economic analysis of a Kalina cycle-based combined heating and power system for low-temperature heat source utilization
The Kalina cycle is effective for recovering and utilizing low-temperature heat sources, but it suffers from low efficiency. In order to enhance energy conversion efficiency, this paper proposes a novel combined heating and power system that integrates the Kalina cycle with an ammonia-water absorption refrigeration cycle. This system uniquely recovers all wasted heat to generate heating capacity, achieving 100 % thermal efficiency. Detailed thermodynamic and economic models are developed, based on which a performance optimization is conducted and shows that the new system generally outperforms the Kalina cycle with an exergy efficiency of 34.47 % and a payback period of 2.31 years. Further performance analysis reveals that turbine power output significantly impacts economic performance, and most exergy destructions occur in the heat exchanger-type equipment. Finally, a parameter sensitivity analysis explores the effects of seven key variables on system performance. Results indicate that increasing the ammonia concentration of the basic solution and turbine inlet temperature, while decreasing the turbine inlet pressure, improves the exergy efficiency of system. An optimal ammonia concentration of the ammonia-strong solution is identified for achieving the shortest payback period.
期刊介绍:
Thermal Science and Engineering Progress (TSEP) publishes original, high-quality research articles that span activities ranging from fundamental scientific research and discussion of the more controversial thermodynamic theories, to developments in thermal engineering that are in many instances examples of the way scientists and engineers are addressing the challenges facing a growing population – smart cities and global warming – maximising thermodynamic efficiencies and minimising all heat losses. It is intended that these will be of current relevance and interest to industry, academia and other practitioners. It is evident that many specialised journals in thermal and, to some extent, in fluid disciplines tend to focus on topics that can be classified as fundamental in nature, or are ‘applied’ and near-market. Thermal Science and Engineering Progress will bridge the gap between these two areas, allowing authors to make an easy choice, should they or a journal editor feel that their papers are ‘out of scope’ when considering other journals. The range of topics covered by Thermal Science and Engineering Progress addresses the rapid rate of development being made in thermal transfer processes as they affect traditional fields, and important growth in the topical research areas of aerospace, thermal biological and medical systems, electronics and nano-technologies, renewable energy systems, food production (including agriculture), and the need to minimise man-made thermal impacts on climate change. Review articles on appropriate topics for TSEP are encouraged, although until TSEP is fully established, these will be limited in number. Before submitting such articles, please contact one of the Editors, or a member of the Editorial Advisory Board with an outline of your proposal and your expertise in the area of your review.