Thermal Science and Engineering Progress最新文献

Development and validation of innovative hot water spray defrosting method 新型热水喷雾除霜方法的开发与验证

IF 5.1 3区工程技术

Thermal Science and Engineering Progress Pub Date : 2025-05-16 DOI: 10.1016/j.tsep.2025.103668

Elif Merve Bahar , Mustafa Aktaş , Burak Aktekeli , Seyfi Şevik , Yaren Güven , Ahmet Aktaş

{"title":"Development and validation of innovative hot water spray defrosting method","authors":"Elif Merve Bahar , Mustafa Aktaş , Burak Aktekeli , Seyfi Şevik , Yaren Güven , Ahmet Aktaş","doi":"10.1016/j.tsep.2025.103668","DOIUrl":"10.1016/j.tsep.2025.103668","url":null,"abstract":"<div><div>One of the most common problems in refrigeration cycles is the failure to defrost the evaporator, resulting in decreased performance. This study proposes the hot water defrosting approach as an alternative to the defrosting process using hot gas, an electric heater, and airflow. For this purpose, a hot water box was designed to use the heat from the compressor discharge line, which contains finned tubes through which R290 (propane) refrigerant flows for defrosting. In addition, a defrost control method algorithm was established. The best coefficient of performance (COP) of 4.34 was obtained in Exp. 3. The highest defrosting efficiency was 58.79 % for the hot water defrosting method, while the lowest value was 28.29 % for the airflow. It was observed that the defrosting time could be shortened by using the hot water method, better energy usage could be achieved by using Exp. 4, and a more effective defrosting efficiency could be achieved by using Exp. 5. It was determined that the hot water method can create a difference of up to 44 % in defrost efficiency compared to the hot gas method. Moreover, it was determined that the new approach has almost the same performance compared to the reverse cycle method, but it can provide an advantage because it is not exposed to sudden pressure fluctuations and mechanical shocks. Despite the modest return on investment (0.56–2.22 years) and sustainability for as long as the system is in use, the risk of corrosion that may occur over time during the hot water spraying process should be considered.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"62 ","pages":"Article 103668"},"PeriodicalIF":5.1,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144070078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Heat transfer mechanism of downward flame spread over convex and inclined flat surfaces 向下火焰在凹凸和倾斜平面上传播的传热机理

IF 5.1 3区工程技术

Thermal Science and Engineering Progress Pub Date : 2025-05-15 DOI: 10.1016/j.tsep.2025.103672

Chuangang Fan , Guanjie Rao , Rongwei Bu , Tong Xu , Yao Huang , Yang Zhou

{"title":"Heat transfer mechanism of downward flame spread over convex and inclined flat surfaces","authors":"Chuangang Fan , Guanjie Rao , Rongwei Bu , Tong Xu , Yao Huang , Yang Zhou","doi":"10.1016/j.tsep.2025.103672","DOIUrl":"10.1016/j.tsep.2025.103672","url":null,"abstract":"<div><div>Convex structures are common in buildings. However, the underlying mechanism governing downward flame spread on convex surfaces remains inadequately understood. In this study, 65 kinds of convex and flat surfaces were designed by varying curvature (denoted by <em>K</em>, 0–2.00 m<sup>−1</sup>), inclination angle (<em>θ</em>, 0–45°), and material widths (<em>W</em>, 2.5–12.5 cm). The downward flame spread behaviors on convex surfaces was then experimentally compared with that on flat surfaces. It is found that as <em>K</em> and <em>θ</em> increase, the average path flame spread rate (APFSR) decreases firstly (Stage I) and then is basically unchanged (Stage II). For convex and inclined flat surfaces, the critical conditions for the change from Stage I to II are <em>K</em> = 1.00 m<sup>−1</sup> and <em>θ</em> = 30° respectively. Moreover, APFSR on convex surfaces is higher than that on flat surfaces. A mathematical correlation is proposed to quantify the relationship between the APFSRs of convex and flat surfaces. In addition, by introducing deRis and infinite-width flame spread models, the time-varying flame spread rate of the convex surface is further discussed to analyze the heat transfer mechanisms. For <em>K</em> < 1.00 m<sup>−1</sup>, radiant heat transfer has an important contribution during the flame spread process. However, for <em>K</em> > 1.41 m<sup>−1</sup>, the flame spread process is consistent with deRis model, indicating gas-phase conduction-dominated mechanism. This study can provide a theoretical basis for fire safety design in complex curved structures.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"62 ","pages":"Article 103672"},"PeriodicalIF":5.1,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144070004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design and performance analysis of a curved channel liquid cooling system for battery thermal management 电池热管理弯曲通道液冷系统的设计与性能分析

IF 5.1 3区工程技术

Thermal Science and Engineering Progress Pub Date : 2025-05-15 DOI: 10.1016/j.tsep.2025.103690

Sinan Keyinci , Petar Ilinčić , Erdi Tosun , Metin Uzun , Ali Cem Yakaryilmaz , Mustafa Ozcanli

{"title":"Design and performance analysis of a curved channel liquid cooling system for battery thermal management","authors":"Sinan Keyinci , Petar Ilinčić , Erdi Tosun , Metin Uzun , Ali Cem Yakaryilmaz , Mustafa Ozcanli","doi":"10.1016/j.tsep.2025.103690","DOIUrl":"10.1016/j.tsep.2025.103690","url":null,"abstract":"<div><div>Optimized thermal management is critical for ensuring the safety, longevity, and performance of lithium-ion battery packs, particularly in high-power applications. This study aims to improve thermal regulation by introducing a novel curved, multi-branch liquid cooling plate (LCP) design and implementing a multi-inlet architecture tailored for realistic battery modules. The thermal performance of these configurations was evaluated using computational fluid dynamics. Various cooling channel configurations were analyzed, including two-channel, four-channel, and multi-inlet LCPs, to assess their impact on temperature uniformity and heat dissipation efficiency. The results indicate that conventional two-channel LCPs provide adequate cooling at higher flow rates but fail to maintain uniform temperature distribution at lower velocities. The four-channel configuration improved thermal performance but still exhibited localized temperature variations. In contrast, the three-inlet cooling system significantly enhanced thermal uniformity, reducing temperature gradients and mitigating maximum temperature (T<sub>max</sub>) rise across all tested flow rates. Even at 0.1 m/s, the T<sub>max</sub> remained below 304 K, demonstrating the system’s ability to maintain safe operating conditions. Pressure drop analysis revealed that while increasing the number of cooling channels improves heat dissipation, it also raises flow resistance, highlighting the need for an optimized balance between thermal performance and pumping power. These findings contribute to the advancement of scalable and application-oriented battery thermal management systems for electric vehicles.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"63 ","pages":"Article 103690"},"PeriodicalIF":5.1,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Circularity assessment of industrial heat exchanger and water treatment systems integration 工业热交换器与水处理系统集成的循环性评价

IF 5.1 3区工程技术

Thermal Science and Engineering Progress Pub Date : 2025-05-14 DOI: 10.1016/j.tsep.2025.103661

João Miguel Ribeiro , Daniel Filipe Cristo Dias , Eliza Nika , Bertrand Delpech , Evina Katsou , Hussam Jouhara

{"title":"Circularity assessment of industrial heat exchanger and water treatment systems integration","authors":"João Miguel Ribeiro , Daniel Filipe Cristo Dias , Eliza Nika , Bertrand Delpech , Evina Katsou , Hussam Jouhara","doi":"10.1016/j.tsep.2025.103661","DOIUrl":"10.1016/j.tsep.2025.103661","url":null,"abstract":"<div><div>Water recycling and reusing strategies in industries have beenpromoted to reduce freshwater consumption. In addition, Heat Pipe Heat Exchanger technology has been employed successfully, resulting in the reduction of natural gas consumption and mitigating greenhouse gas emissions. It is important to assess the true benefits of the application of these Circular Economy strategies. Therefore, this work assesses the integration of a Heat Pipe Condenser Economiser (HPCE) and a water treatment system in a ceramic industry. Additionally, rooftop rainwater harvesting is integrated into the industry. The CE assessment methodologies and selected indicators measure the efficiency of the transition from a linear to a circular economy and identify strategies for optimisation. However, the interactions between human and natural systems related to the abstraction of resources and release of outflows are not considered. This is important to understand potential disruptions when implementing circular actions. Therefore, the assessment focuses on circular principles such as resource traceability and value created by implemented actions, and through resource flow and circular action indicators, the intrinsic circularity of system integration is quantified. The assessment showed the integration of both systems and the rooftop rainwater harvesting increased the Circular Water Flow and the Water Withdrawal Reduction up to 33.73 % and 22.88 %, respectively. Moreover, it demonstrates that the HPCE integration increased the Recovered Energy Contribution up to 19.98 %. This indicates the system’s integrations increased circular performance over the baseline scenario. Additionally, the assessment enabled a scenario analysis which aided in identifying further strategies to improve the circular actions, such as reducing freshwater withdrawal.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"62 ","pages":"Article 103661"},"PeriodicalIF":5.1,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144070005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sustainable management of anaerobic digestate through torrefaction into bioenergy: Mass and energy balance, performance indices, thermal-pyrolysis behavior 厌氧消化物转化为生物能源的可持续管理：质量和能量平衡、性能指标、热热解行为

IF 5.1 3区工程技术

Thermal Science and Engineering Progress Pub Date : 2025-05-14 DOI: 10.1016/j.tsep.2025.103688

Rickwinder Singh , Christoph Lindenberger , Aakash Chawade , Vivekanand Vivekanand

{"title":"Sustainable management of anaerobic digestate through torrefaction into bioenergy: Mass and energy balance, performance indices, thermal-pyrolysis behavior","authors":"Rickwinder Singh , Christoph Lindenberger , Aakash Chawade , Vivekanand Vivekanand","doi":"10.1016/j.tsep.2025.103688","DOIUrl":"10.1016/j.tsep.2025.103688","url":null,"abstract":"<div><div>This study examines the torrefaction of raw digestate (RD) to upgrade properties of product followed by thermal-pyrolysis behaviour analysis of RD and torrefied product. Results showed that key torrefaction indices mainly mass yield (MY%), energy yield (EY%), higher heating ealue (HHV), energy-mass co-benefit index (EMCI) were affected by torrefaction reaction temperature. As temperature increased 200 °C to 300 °C, MY% was decreased from∼95 % to ∼69 % while EY% initially enhanced till 260 °C, then became constant till 300 °C. Torrefaction enhanced fixed carbon and HHV by 14.3–86.7 % and 15.8–35.8 % as compared to RD as temperature increased from 200 to 300 °C, however, ash content increased. Torrefaction of RD at 240 °C for 30 mins provided best results in terms of MY%, EY% and HHV with tradeoff between fixed-carbon and ash-content. Furthermore, thermal-pyrolysis behaviour of RD and TD240 was investigated by model-free and model-based kinetic models to examine the kinetics primary reactions under thermal decomposition. Estimated activation energies (Ea) reduced from 129.2-225.9 kJ/mol, 122.4–203.5 kJ/mol, and 127.3–227.4 kJ/mol for RD to 107.5–132.4 kJ/mol, 110.4–132.8 kJ/mol and 106.2–132.7 kJ/mol for TD240 using Friedman, Kissinger-Akahira-Sunose (KAS) and Ozawa-Flynn-Wall (OFW) models respectively. Activation enthalpy (ΔH) obtained 123.9–190 kJ/mol and 108.4–127.6 kJ/mol for RD and TD240. Furthermore, mass and energy balance showed the process has 97.65 % self-efficient without any external energy. Overall, effectiveness of torrefaction process showed to upgrade the existing biogas plants.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"62 ","pages":"Article 103688"},"PeriodicalIF":5.1,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144070952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical investigation of the Space-Fractional Straight Fin Model with temperature-dependent properties using the Shooting Method 具有温度相关特性的空间分数直鳍模型的射击法数值研究

IF 5.1 3区工程技术

Thermal Science and Engineering Progress Pub Date : 2025-05-14 DOI: 10.1016/j.tsep.2025.103640

Fran Sérgio Lobato , Fábio de Oliveira Arouca

{"title":"Numerical investigation of the Space-Fractional Straight Fin Model with temperature-dependent properties using the Shooting Method","authors":"Fran Sérgio Lobato , Fábio de Oliveira Arouca","doi":"10.1016/j.tsep.2025.103640","DOIUrl":"10.1016/j.tsep.2025.103640","url":null,"abstract":"<div><div>Traditionally, models based on physical phenomena are represented by integer-order differential equations. The extension to non-integer (fractional) orders represents a significant advancement in modeling highly nonlinear systems. However, fractional differential models introduce greater complexity compared to integer-order models. This study aims to analyze the physical parameters and evaluate the influence of fractional orders on the temperature and efficiency profiles of fins. To achieve this, the original two-point boundary value problem is transformed into an equivalent single-point problem using the Shooting Method. The resulting system is then solved using the Fractional Adams Predictor–Corrector Method. To validate the proposed approach, two straight fins with temperature-dependent properties are considered. The results demonstrate that the proposed methodology is a promising strategy for solving both integer and fractional order problems. The change in the fractional order influences the model parameters and, consequently, the temperature profiles and fin efficiency. Furthermore, depending on the fractional order, the temperature profile may be distorted in relation to the integer-order model, and the heat transfer process may be faster (or slower) in fractional order models compared to those with an integer order. Regarding the integer-order model, the fin efficiency can be maximized by choosing an appropriate fractional order.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"62 ","pages":"Article 103640"},"PeriodicalIF":5.1,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144070954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Performance improvement and fuel saving by using obstacle in cathode channel of a porous-end PEMFC: A CFD simulation study 多孔端PEMFC阴极通道中使用障碍物提高性能和节省燃料的CFD模拟研究

IF 5.1 3区工程技术

Thermal Science and Engineering Progress Pub Date : 2025-05-13 DOI: 10.1016/j.tsep.2025.103684

Sahar Bashiri , Nima Amanifard , Hesam Moayedi

{"title":"Performance improvement and fuel saving by using obstacle in cathode channel of a porous-end PEMFC: A CFD simulation study","authors":"Sahar Bashiri , Nima Amanifard , Hesam Moayedi","doi":"10.1016/j.tsep.2025.103684","DOIUrl":"10.1016/j.tsep.2025.103684","url":null,"abstract":"<div><div>Performance development of polymer electrolyte membrane (PEM) fuel cells has attracted a great attention as clean and affordable energy sources. In the present study, the effect of using a rectangular obstacle in the cathode channel of a porous-end PEMFC was numerically investigated using computational fluid dynamics (CFD) simulation in ANSYS Fluent software. The aim of this work is to utilize the passive method in both anode and cathode channels of a PEMFC to improve the fuel cell efficiency while decreasing hydrogen consumption and pumping power. Hence, the impact of various positions and dimensions of a rectangular obstacle within the cathode channel of a PEMFC is numerically studied. Also, the influence of adding porous media with a specified thickness at the anode channel outlet within a PEMFC is examined. Results show that the presence of an obstacle at h = 0.95 mm and b = 50 mm, along with a porous media of suitable thickness (1 mm), it causes a more uniform dispersion of species and pressure in both channels. Also, results illustrate that increasing the height and distance of the obstacle from the cathode channel inlet of the porous-end PEMFC reduces the pumping power consumption by 93.64 %, while simultaneously maintaining a constant current density. It is indicated by the results that the overall performance of the porous-end PEMFC with the optimal obstacle configuration is enhanced by a factor of 14.31 compared to the Base PEMFC model.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"62 ","pages":"Article 103684"},"PeriodicalIF":5.1,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144070033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental study on heat transfer performance of spray cooling on high heat flux rail surface 高热流密度轨道表面喷雾冷却换热性能实验研究

IF 5.1 3区工程技术

Thermal Science and Engineering Progress Pub Date : 2025-05-13 DOI: 10.1016/j.tsep.2025.103685

Shuo Ma , Yongyichuan Zhang , Chang Xu , Yu Wang , Zhipeng Zhou , Kexun Wang , Hongting Ma

{"title":"Experimental study on heat transfer performance of spray cooling on high heat flux rail surface","authors":"Shuo Ma , Yongyichuan Zhang , Chang Xu , Yu Wang , Zhipeng Zhou , Kexun Wang , Hongting Ma","doi":"10.1016/j.tsep.2025.103685","DOIUrl":"10.1016/j.tsep.2025.103685","url":null,"abstract":"<div><div>Lack of the principle of selecting the best spray cooling parameters will be detrimental to the effective thermal management of the high heat flux electromagnetic rail. This paper conducted experimental study on the heat transfer characteristics and cooling effect of spray cooling on a high heat flux vertical rail surface, an experimental system was designed and built, and the main influencing factors on the cooling effect of the rail were experimentally studied. the results showed that with the increasing spray distance, the critical heat flux (CHF), average heat flux (AHF) and integrated heat transfer coefficient (IHTC) all increased first and then decreased, while the average temperature of rail surface gradually decreased. When the spray increased to 25 cm, the CHF, AHF and IHTC reached the maximum value of 241.69 W/cm<sup>2</sup>, 44.10 W/(cm<sup>2</sup> K) and 14007.02 W/(m<sup>2</sup> K), while the average surface temperature (AST) of rail reached the minimum value of 55.77 ℃. With the increase of spray angle, the CHF, AHF and IHTC shown a trend of first increasing and then decreasing, while the AST of rail shown a trend of first decreasing and then increasing. The best cooling effect can be obtained at the spray angle of 0°. As the cooling water pressure at the nozzle inlet increased, the CHF, AHF and IHTC all shown a gradually increasing trend, while the AST of rail shown a gradually decreasing trend. When the cooling water pressure increased to 0.5 MPa, the CHF, AHF and IHTC reached the maximum value, while the AST reached the lowest value. The results have a positive guiding significance for improving the spray cooling effect of the high heat flux rail surface.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"62 ","pages":"Article 103685"},"PeriodicalIF":5.1,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144070032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical simulation research on downhole methane combustion heating tool for hydrate exploitation: Gas−liquid heat transfer performance

IF 5.1 3区工程技术

Thermal Science and Engineering Progress Pub Date : 2025-05-13 DOI: 10.1016/j.tsep.2025.103686

Bingyu Sun , Yuting Wang , Yanxin Liu , Xin Zhang , Hanxiang Wang , Jiaqi Che , Shen Fan

{"title":"Numerical simulation research on downhole methane combustion heating tool for hydrate exploitation: Gas−liquid heat transfer performance","authors":"Bingyu Sun , Yuting Wang , Yanxin Liu , Xin Zhang , Hanxiang Wang , Jiaqi Che , Shen Fan","doi":"10.1016/j.tsep.2025.103686","DOIUrl":"10.1016/j.tsep.2025.103686","url":null,"abstract":"<div><div>Natural gas hydrates are considered a promising clean energy resource with significant development potential. This study focuses on the research and application of energy supplementation tools in natural gas hydrate extraction. First, a methane combustion heating process is proposed, and a methane combustion heating tool is designed to heat hydrate reservoirs through methane combustion. The tool includes key components such as a pressure-bearing pipe and an igniter, with the primary goal of promoting hydrate dissociation by increasing the reservoir temperature. To assess the tool’s ignition and heating capabilities in a water-immersed environment, surface experiments are conducted, and the tool’s actual value for reservoir development is verified using a gas production model. Next, a flow field model of the tool in the downhole environment is established using Computational Fluid Dynamics (CFD), and the flow field characteristics and heat transfer performance of the tool are systematically studied. The results show that the tool can increase the reservoir temperature by 10 °C. Further analysis of the impact of various operational parameters on the internal flow field and heating efficiency reveals that a higher inlet gas flow rate (methane at 6 m/s) and optimized gas ratio (e.g., 1:5) significantly improve heating efficiency. Additionally, the influence of key structural parameters, such as the number of combustion ports and combustion channel dimensions, on the tool’s heating performance is analyzed. Based on these findings, recommendations for optimizing the tool’s design are proposed.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"62 ","pages":"Article 103686"},"PeriodicalIF":5.1,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143943455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A unique thermal system coupled with thermal energy and carbon capturing and storage options 一个独特的热系统，加上热能和碳捕获和储存选项

IF 5.1 3区工程技术

Thermal Science and Engineering Progress Pub Date : 2025-05-12 DOI: 10.1016/j.tsep.2025.103683

Mohamad Ayoub, Ibrahim Dincer

{"title":"A unique thermal system coupled with thermal energy and carbon capturing and storage options","authors":"Mohamad Ayoub, Ibrahim Dincer","doi":"10.1016/j.tsep.2025.103683","DOIUrl":"10.1016/j.tsep.2025.103683","url":null,"abstract":"<div><div>In this work, a Municipal Solid Waste (MSW) and solar thermal driven trigeneration system for power, space heating, and freshwater production is developed and thermodynamically assessed. The novelty of this work includes the use of MSW composition listed for Ontario, as fuel feed to an air-Brayton cycle, as well as coupling a heat pump to it through water conduits, to carry out thermal desalination and space heating applications. Related calculations are carried out using corresponding mass, energy, entropy, and exergy balance equations of key system components, and Engineering Equation Solver (EES). The integrated heat pump utilizes R134a refrigerant and is driven by solar thermal collectors during periods when sunlight is available, and through sensible thermal energy storage otherwise. Under nominal operating conditions, an irradiance of 800 W/m<sup>2</sup> is considered, and the energy and exergy efficiencies of 37.43 % and 24.55 %, are achieved, respectively. Moreover, a coefficient of performance of 2.72 is obtained for the same operating conditions. For more location specific calculations, the solar profile for the Durham region in Ontario, Canada, is used and values are obtained as yearly averages for irradiance. This results in a variation of energy and exergy efficiencies across a diurnal operation, where they range between 52.56 % to 43.98 % and 35.67 % to 29.27 %, respectively. The thermal energy storage charging capacity ranges between 2,625 kWh to 12,985 kWh during the day, and results in a uniform discharge capacity of 6,297 kWh for periods of no sunlight where energy and exergy efficiencies are obtained to be 49.43 % and 33.3 %, respectively. The variation of the reference temperature is also considered where the exergy efficiency decreases from 24.55 % to 23.38 %, as the reference temperature increases from 296.15 K to 340 K for 800 W/m<sup>2</sup> irradiance. Finally, corresponding exergy destruction calculations are carried out to determine potential room for improvement.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"62 ","pages":"Article 103683"},"PeriodicalIF":5.1,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144070953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0