Evaluation of a novel environmentally friendly cascade combined cooling and power system integrated with LNG regasification and desalination unit

IF 5.4 3区工程技术 Q2 ENERGY & FUELS

Thermal Science and Engineering Progress Pub Date : 2025-09-17 DOI:10.1016/j.tsep.2025.104113

Ch. Hsu , Ali Basem , L. Thanh Le , Pradeep Kumar Singh , M. Ali Rusho , B. Abdullaeva , A.M.A. Mohamed , Masoud Alajmi , A. Smerat , J. Khan Bhutto , S. Islam

{"title":"Evaluation of a novel environmentally friendly cascade combined cooling and power system integrated with LNG regasification and desalination unit","authors":"Ch. Hsu , Ali Basem , L. Thanh Le , Pradeep Kumar Singh , M. Ali Rusho , B. Abdullaeva , A.M.A. Mohamed , Masoud Alajmi , A. Smerat , J. Khan Bhutto , S. Islam","doi":"10.1016/j.tsep.2025.104113","DOIUrl":null,"url":null,"abstract":"<div><div>In this study, a comprehensive thermo-economic performance analysis is conducted on a newly developed cascade combined cooling and power system that utilizes the cold energy of liquefied natural gas, integrated with seawater desalination. The proposed system generates electricity through a gas turbine cycle, an organic Rankine cycle equipped with a recuperator, and a power generation unit using LNG as the working fluid. Additionally, gas expansion within the turbine, combined with the integration of an evaporator, yields a cooling output of 943.1 kW. The system demonstrates an energy efficiency of 72.97 %, an exergy efficiency of 48.79 %, total exergy destruction of 3694 kW, a total cost rate of $4569.04/h, and a unit exergy cost of $201.4/GJ. For single-generation and combined cooling and power modes, the energy efficiencies are evaluated at 48.36 % and 55.84 %, respectively. Second-law analysis reveals that the gas turbine and fuel burner are responsible for the highest exergy destruction, contributing 74 % and 54.3 % of the total, respectively. To mitigate system irreversibilities, three key parameters were examined: combustion air flow rate, air temperature before the gas turbine, and the working fluid pressure in the ORC. The analysis indicates that increasing the combustion air temperature to 1000 °C enhances energy efficiency to 76.6 %, exergy efficiency to 53 %, and gas turbine power output to 7581 kW. Moreover, increasing the combustion air flow rate to 12 kg/s results in an improvement in energy efficiency to 77 %, an increase in exergy efficiency to 52 %, and a reduction in the unit exergy cost to $189.13/GJ.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"67 ","pages":"Article 104113"},"PeriodicalIF":5.4000,"publicationDate":"2025-09-17","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/S2451904925009047","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}

引用次数: 0

Abstract

In this study, a comprehensive thermo-economic performance analysis is conducted on a newly developed cascade combined cooling and power system that utilizes the cold energy of liquefied natural gas, integrated with seawater desalination. The proposed system generates electricity through a gas turbine cycle, an organic Rankine cycle equipped with a recuperator, and a power generation unit using LNG as the working fluid. Additionally, gas expansion within the turbine, combined with the integration of an evaporator, yields a cooling output of 943.1 kW. The system demonstrates an energy efficiency of 72.97 %, an exergy efficiency of 48.79 %, total exergy destruction of 3694 kW, a total cost rate of $4569.04/h, and a unit exergy cost of $201.4/GJ. For single-generation and combined cooling and power modes, the energy efficiencies are evaluated at 48.36 % and 55.84 %, respectively. Second-law analysis reveals that the gas turbine and fuel burner are responsible for the highest exergy destruction, contributing 74 % and 54.3 % of the total, respectively. To mitigate system irreversibilities, three key parameters were examined: combustion air flow rate, air temperature before the gas turbine, and the working fluid pressure in the ORC. The analysis indicates that increasing the combustion air temperature to 1000 °C enhances energy efficiency to 76.6 %, exergy efficiency to 53 %, and gas turbine power output to 7581 kW. Moreover, increasing the combustion air flow rate to 12 kg/s results in an improvement in energy efficiency to 77 %, an increase in exergy efficiency to 52 %, and a reduction in the unit exergy cost to $189.13/GJ.

查看原文本刊更多论文

结合LNG再气化和海水淡化装置的新型环保型梯级联合冷却和电力系统的评估

本研究对新开发的一种利用液化天然气冷能并结合海水淡化的梯级冷电联合系统进行了综合热经济性能分析。该系统通过燃气轮机循环、配备回热器的有机朗肯循环和使用液化天然气作为工作流体的发电单元来发电。此外，涡轮内的气体膨胀，结合蒸发器的集成，产生943.1千瓦的冷却输出。该系统的能源效率为72.97%，火用效率为48.79%，总火用损耗为3694 kW，总成本为4569.04美元/h，单位火用成本为201.4美元/GJ。对于单代和联合冷却和电源模式，能源效率分别为48.36%和55.84%。第二定律分析表明，燃气轮机和燃料燃烧器的火用破坏最大，分别占总破坏量的74%和54.3%。为了减轻系统的不可逆性，研究了三个关键参数：燃烧空气流量、燃气轮机前的空气温度和ORC内的工作流体压力。分析表明，将燃烧空气温度提高到1000℃，可将能效提高到76.6%，将火用效率提高到53%，将燃气轮机输出功率提高到7581 kW。此外，将燃烧空气流速提高到12 kg/s，可将能源效率提高到77%，将火用效率提高到52%，并将单位火用成本降低到189.13美元/GJ。

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

Thermal Science and Engineering Progress Chemical Engineering-Fluid Flow and Transfer Processes

CiteScore

7.20

自引率

10.40%

发文量

327

审稿时长

41 days

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.