Thermal Science and Engineering Progress最新文献_第2页

6E evaluation of an innovative humidification dehumidification solar distiller unit: An experimental investigation 6E 评估创新的加湿除湿太阳能蒸馏器装置：实验研究

IF 5.1 3区工程技术

Thermal Science and Engineering Progress Pub Date : 2024-11-14 DOI: 10.1016/j.tsep.2024.103052

A.S. Abdullah , Mamoun M. Elsayad , Sulaiman Almoatham , Swellam W. Sharshir

{"title":"6E evaluation of an innovative humidification dehumidification solar distiller unit: An experimental investigation","authors":"A.S. Abdullah , Mamoun M. Elsayad , Sulaiman Almoatham , Swellam W. Sharshir","doi":"10.1016/j.tsep.2024.103052","DOIUrl":"10.1016/j.tsep.2024.103052","url":null,"abstract":"<div><div>This work aims to enhance the productivity, efficiency, energy utilization, feasibility, and environmental outcomes of solar desalination systems via representing an innovative humidification dehumidification solar distillation unit coupled with a built-in air solar heater and photovoltaic thermal unit. The air solar heater was further improved by the incorporation of copper chips as thermal energy-storing materials for extending the desalination process during the sun’s hours. Three distinct humidifier beds, including plastic waste (case A), wick materials (case B), and cellulose paper (case C) were tested and compared regarding system temperatures and hourly and daily drinkable water yield. Additionally, a 6E analysis was assessed and evaluated in terms of energy, exergy, economic, exergoeconomic, exergoenvironmental, and exergoenviroeconomic analysis for all the cases. According to the outcomes, the humidification dehumidification solar distiller with cellulose paper yielded the highest productivity and 6E outcomes where the daily drinkable water, thermal efficiency, and exergy efficiency were estimated as 7.78 L/m<sup>2</sup>, 73.45 %, and 5.3 %, outperforming the CSD by nearly 142.59 %, 144.02 %, and 229.19 %, respectively. Moreover, the price of drinkable water and the payback time decreased to 0.0099 $/L and 0.12 years, which represents a reduction of 68.27 % and 69.23 %, respectively, at an exergoeconomic factor of 4.19 kWh/$. Furthermore, the amount of CO<sub>2</sub> reduced was increased to 3.92 tons, which is associated with earned credits of carbon of 56.78$. Finally, for this case, the HDH humidifier efficiency, dehumidifier effectiveness, and gain output ratio maximum and mean values were 96.66 and 84.5 %, 85.61 and 78.96 %, and 1.86 and 1.08, respectively.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"56 ","pages":"Article 103052"},"PeriodicalIF":5.1,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654343","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

Performances of a gas turbine power plant with a direct evaporative saturator

IF 5.1 3区工程技术

Thermal Science and Engineering Progress Pub Date : 2024-11-14 DOI: 10.1016/j.tsep.2024.103047

Samira Pourhedayat, Eric Hu, Lei Chen

{"title":"Performances of a gas turbine power plant with a direct evaporative saturator","authors":"Samira Pourhedayat, Eric Hu, Lei Chen","doi":"10.1016/j.tsep.2024.103047","DOIUrl":"10.1016/j.tsep.2024.103047","url":null,"abstract":"<div><div>One way to improve the performance of gas turbine power plants is to saturate the compressed air (from the compressor) before it enters the combustion chamber, using a saturator. Indeed, utilization of an air saturator has the potential to augment the enthalpy within the combustion chamber, which may ultimately lead to an enhancement in the overall performance of the gas turbine. A direct evaporative cooler (DEC) is proposed as the saturator, i.e. DES for the GT plant in this study. The impact of the DES on the performance of the GT power plant has been studied in general through a sensitivity analysis and specifically through a case study, using an analytical model developed in this study and programmed in Engineering Equation Solver (EES) software. It has been demonstrated that increasing the inlet air and water temperatures in a DES system can lead to a notable enhancement in the performance of a gas turbine. The findings of the study indicated that the utilization of a DES could result in an increase of up to 7 % in power output and thermal efficiency of the GT in comparison to a gas turbine that does not possess a saturator. This improvement is achievable if waste heat is partially recovered through a heat recovery system (HRS) and employed for the purpose of preheating both the compressed air and water that are entering the DES. This improvement is approximately 6 % and 4 % respectively, if only the saturator inlet water or air temperatures were increased separately.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"56 ","pages":"Article 103047"},"PeriodicalIF":5.1,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142699161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis of OLED glass substrate heated by heating tube array based on multiple optimization algorithms 基于多重优化算法的加热管阵列加热 OLED 玻璃基板分析

IF 5.1 3区工程技术

Thermal Science and Engineering Progress Pub Date : 2024-11-14 DOI: 10.1016/j.tsep.2024.103053

Yiyi Wang , Chang Xu , Huikun Cai

{"title":"Analysis of OLED glass substrate heated by heating tube array based on multiple optimization algorithms","authors":"Yiyi Wang , Chang Xu , Huikun Cai","doi":"10.1016/j.tsep.2024.103053","DOIUrl":"10.1016/j.tsep.2024.103053","url":null,"abstract":"<div><div>The temperature uniformity of OLED glass substrate during heat treatment is a key factor affecting the quality of its imaging display. This paper constructs the heating process model of OLED glass substrate based on heating tube array according to the actual scene, studies the thermal characteristics of OLED glass substrate, and then optimizes the temperature uniformity of glass substrate under isometric heating mode based on genetic algorithm, particle swarm optimization algorithm and simulated annealing algorithm. Compared with the initial solution of the algorithm, the optimization rates of the three algorithms respectively reach 75.5%, 86.4% and 98.3%, and the temperature differences are reduced to 3.82℃, 1.44℃ and 0.30℃. Finally, an experimental platform is built to verify the optimization results of different algorithms. The absolute errors are 0.58℃, 1.46℃, 1.30℃ respectively, all lower than 1.5℃, which is within the allowable range of process requirements. It is proved that the proposed optimization algorithm control mode can reduce the heating temperature difference of glass substrate to the ideal level based on the heating device with low cost and simple structure. This scheme provides some reference for the formulation of temperature distribution solution in heat pipe heating technology.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"56 ","pages":"Article 103053"},"PeriodicalIF":5.1,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142698080","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

Velocity-driven optimization of film cooling in methane/oxygen rocket engines using coupled wall function

IF 5.1 3区工程技术

Thermal Science and Engineering Progress Pub Date : 2024-11-13 DOI: 10.1016/j.tsep.2024.103051

Jianing Liu , Silong Zhang , Jianfei Wei , Oskar J. Haidn

{"title":"Velocity-driven optimization of film cooling in methane/oxygen rocket engines using coupled wall function","authors":"Jianing Liu , Silong Zhang , Jianfei Wei , Oskar J. Haidn","doi":"10.1016/j.tsep.2024.103051","DOIUrl":"10.1016/j.tsep.2024.103051","url":null,"abstract":"<div><div>This study investigates the application of coupled wall functions to the research of film cooling in methane/oxygen rocket engine combustion chambers. By manipulating film mass flow rate and inlet size, the influence of different film-mainstream velocity ratios on flow dynamics, combustion, wall heat transfer, and cooling efficiency within the combustion chamber is explored. Results indicate that as the ratio of film velocity to mainstream velocity (<em>R<sub>V</sub></em>) increases, the combustion chamber pressure initially decreases before increasing, with a corresponding trend observed in vortex intensity at the inlet section. Comparative analysis reveals that, while maintaining a constant mass flow rate, reducing the film inlet height results in lower pressures and weaker swirl strength. Furthermore, wall heat transfer decreases gradually with increasing <em>R<sub>V</sub></em>, with lower heat transfer observed in cases involving additional low-temperature methane injection. Notably, the introduction of coupled wall functions minimally impacts mainstream flow and combustion. Analysis of Net Heat Flux Reduction (NHFR) indicates a rapid decrease in cooling efficiency in the front half of the combustion chamber, emphasizing the suitability of employing a film cooling inlet every one-fifth section in a methane/oxygen engine. Moreover, increasing the mass flow rate enhances cooling efficiency as <em>R<sub>V</sub></em> increases, while altering the inlet size yields nearly constant cooling efficiency. Therefore, maximizing film mass flow rate is deemed preferable for film cooling arrangements in a specific rocket engine; however, comparative studies reveal a gradual reduction in engine specific impulse with increasing mass flow rate, underscoring the necessity for engine-specific determinations.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"56 ","pages":"Article 103051"},"PeriodicalIF":5.1,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142699162","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

Seasonal performance comparison of R-410A and R-454B in a variable-speed air-cooled scroll chiller 变速风冷涡旋式制冷机中 R-410A 和 R-454B 的季节性性能比较

IF 5.1 3区工程技术

Thermal Science and Engineering Progress Pub Date : 2024-11-12 DOI: 10.1016/j.tsep.2024.103050

Avinash Kumar , Nitin Karwa , Ankit Sethi , Nilesh Purohit

{"title":"Seasonal performance comparison of R-410A and R-454B in a variable-speed air-cooled scroll chiller","authors":"Avinash Kumar , Nitin Karwa , Ankit Sethi , Nilesh Purohit","doi":"10.1016/j.tsep.2024.103050","DOIUrl":"10.1016/j.tsep.2024.103050","url":null,"abstract":"<div><div>In recent years, there has been increasing concern about the impact of air conditioning and refrigeration on global warming. This is particularly related to the emissions of refrigerants with high global warming potentials (GWP), such as R-410A, which is used in air conditioning and chiller systems. There has been a concerted effort within the HVAC industry to find lower GWP refrigerants to replace R-410A in HVAC systems. In this paper, a 10.5 kW (3 TR) air-cooled variable-speed scroll chiller has been utilized to conduct an experimental comparison of R-410A (GWP of 2088) and its low GWP A2L alternative R-454B (GWP of 466) according to AHRI 551/591 testing condition at rating and part load condition with optimized charge. The compressor speed and suction superheat were matched for both refrigerants at all the test conditions. R-454B shows 98 % capacity and 102 % efficiency compared to R-410A at rating conditions of 35 °C outdoors and water return temperature of 12 °C. The IPLV of the R-454B chiller was just 1 % higher than R-410A. The discharge temperature of R-454B and compressor isentropic efficiency is 8 % higher and almost like R-410A, respectively. The optimized charge of R-454B was 5 % lower refrigerant charge compared to R-410A. The LCCP analysis for major Indian cities over a 15-year operational span demonstrates a notable reduction, ranging from 6.6 % to 7.3 %, in overall R-454B emissions compared to R-410A. The study demonstrates that R-454B is a drop-in replacement to R-410A designs and reduces the direct GHG emission from the chiller by 76 %.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"56 ","pages":"Article 103050"},"PeriodicalIF":5.1,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654347","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

Enhancing Li-ion battery efficiency: An experimental study on hybrid cooling approach with paraffin and forced air convection 提高锂离子电池效率：石蜡和强制空气对流混合冷却方法的实验研究

IF 5.1 3区工程技术

Thermal Science and Engineering Progress Pub Date : 2024-11-12 DOI: 10.1016/j.tsep.2024.103048

Enis Selcuk Altuntop , Dogan Erdemir , Yüksel Kaplan , Veysel Özceyhan

{"title":"Enhancing Li-ion battery efficiency: An experimental study on hybrid cooling approach with paraffin and forced air convection","authors":"Enis Selcuk Altuntop , Dogan Erdemir , Yüksel Kaplan , Veysel Özceyhan","doi":"10.1016/j.tsep.2024.103048","DOIUrl":"10.1016/j.tsep.2024.103048","url":null,"abstract":"<div><div>This article experimentally investigates the application of commercial paraffin for the thermal management of Li-ion battery packs under various operational and design parameters. The performance of paraffin is compared to natural and forced air convection effects without paraffin. In the experiments, battery packs of 12 V, 24 V, and 48 V are utilized. The discharge rates are 1, 2, 3, 4, and 5C. The distance variations between the battery cells for the PCM cooling method are examined at 0.25D, 0.5D, and 1D (D is the diameter of the battery cell). The results indicate that the battery packs with natural air convection exceed the thermal limitations recommended by the battery cell manufacturer. Besides that, forced air convection created undesirable conditions for the long-term use of batteries. The energy efficiency values for hybrid cooling that combines paraffin and forced air are higher than those for forced air convection. The battery packs have demonstrated the best performance in 48 V, 0.5D and 0 m/s case with 97 % efficiency for 4C discharge rate. The lowest efficiency has been seen in 12 V, 0.5D and 0 m/s with 50 % for 5C discharge rate. The lowest temperature difference is observed in 12 V, 0.25D and 0 m/s for 1C discharge rate which is 1.9 °C. The highest temperature difference is spotted in 12 V, 0D, and 0 m/s case for 5C discharge rate which is 32 °C. The highest temperature is 102 °C in 48 V, 0D, and 0 m/s case for 5C discharge rate. The lowest temperature is 24 °C in 24 V, 0.5, and 7.5 m/s case for 1C discharge rate.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"56 ","pages":"Article 103048"},"PeriodicalIF":5.1,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142699151","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 thermo-economic comparison on new and conventional alternatives of pressurization of CO2 in CCS systems 二氧化碳捕获和封存系统中二氧化碳加压的新型和传统替代方法的热经济比较

IF 5.1 3区工程技术

Thermal Science and Engineering Progress Pub Date : 2024-11-10 DOI: 10.1016/j.tsep.2024.103046

S. Khalili, L.Garousi Frashi

{"title":"A thermo-economic comparison on new and conventional alternatives of pressurization of CO2 in CCS systems","authors":"S. Khalili, L.Garousi Frashi","doi":"10.1016/j.tsep.2024.103046","DOIUrl":"10.1016/j.tsep.2024.103046","url":null,"abstract":"<div><div>The final stage of carbon capture and storage processes involves the pressurization of CO<sub>2</sub> by a suitable method which is conventionally carried out through a series of compressors with intercoolers in between them. In the present study, the idea of liquefying the captured CO<sub>2</sub> is considered. Four different systems for the liquefaction process are evaluated and compared Thermo-economically with the benchmark system of direct carbon dioxide compression. The results indicate that the EPLS system outperforms the others, with a product cost 5.89% lower than the benchmark system. Evaluations show that most of the costs are imposed by the initial compression stage in each system. A detailed investigation of the sensitivity analysis shows that the benchmark and claude systems have the largest dependency on pressure ratio and intercooling temperature, respectively. Additionally, evaluation of the economic parameters indicates that the changes in unit cost of power have the most effect on the benchmark system while the interest rate affects the results of claude and DEBARS more than other options. Detailed evaluations reveal that the EPLS layout has the advantage of less dependency on the changes of operating parameters and on the other hand, the cost of input heat, the maintenance factor, and the generator and evaporator temperatures make a high difference in the final product cost of the DEBARS. Finally, the effect of pressure drops in heat exchangers is investigated and results reveal that the consideration of pressure drops leads to power penalties ranging from 0.97 to 8.52 $/hr in different systems.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"56 ","pages":"Article 103046"},"PeriodicalIF":5.1,"publicationDate":"2024-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654346","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

Predictive modeling for dynamic heat load in frigid railway roadbeds: An energy-efficient approach 寒冷铁路路基动态热负荷预测模型：节能方法

IF 5.1 3区工程技术

Thermal Science and Engineering Progress Pub Date : 2024-11-10 DOI: 10.1016/j.tsep.2024.103049

Tianfei Hu , Liqi Zhao , Tengfei Wang , Zurun Yue , Yifei Yuan

{"title":"Predictive modeling for dynamic heat load in frigid railway roadbeds: An energy-efficient approach","authors":"Tianfei Hu , Liqi Zhao , Tengfei Wang , Zurun Yue , Yifei Yuan","doi":"10.1016/j.tsep.2024.103049","DOIUrl":"10.1016/j.tsep.2024.103049","url":null,"abstract":"<div><div>This research presents an innovative approach to dynamic heat load prediction in railway roadbeds situated in cold climates by incorporating the concept of heat load, traditionally used in the building sector. The method facilitates a comprehensive evaluation and energy-efficient control of heating systems in these specialized transportation infrastructures. Utilizing an integrated building simulation toolkit (DeST), a computational model for roadbed micro-elements is established, integrating weather, radiation, and shading models to simulate pertinent environmental factors. Employing the state space method, a thermal module calculates the base temperature of these micro-elements. Subsequent calculations determine the roadbed’s target temperature and temporal heat load. Empirical data from the Harbin-Qiqihar high-speed railway validates the method, revealing strong alignment between computed and measured roadbed temperatures. Heat load peaks at 945 W/m and averages 335 W/m in freezing conditions. The method accounts for thermal hysteresis and variations related to roadbed orientation and depth. Regional statistics show a heat load range of 531 to 1,338 W/m and establish a direct correlation between heat load and latitude. The findings significantly enhance the ability to assess frost damage and design energy-efficient heating plans for railway roadbeds in frigid environments.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"56 ","pages":"Article 103049"},"PeriodicalIF":5.1,"publicationDate":"2024-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654345","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 study on the factors influencing the transient deformation characteristics of compressor cylinders based on thermal–mechanical coupling 基于热机械耦合的压缩机气缸瞬态变形特性影响因素研究

IF 5.1 3区工程技术

Thermal Science and Engineering Progress Pub Date : 2024-11-09 DOI: 10.1016/j.tsep.2024.103044

Guoxu Zhang, Zhiqiang Huang, Cheng Wang, Zhenye Li, Shichaun Tan, Biao Xu

{"title":"A study on the factors influencing the transient deformation characteristics of compressor cylinders based on thermal–mechanical coupling","authors":"Guoxu Zhang, Zhiqiang Huang, Cheng Wang, Zhenye Li, Shichaun Tan, Biao Xu","doi":"10.1016/j.tsep.2024.103044","DOIUrl":"10.1016/j.tsep.2024.103044","url":null,"abstract":"<div><div>The deformation of the reciprocating compressor seriously affects the efficiency and reliability of the shale gas extraction unit. In order to study the deformation characteristics and influencing factors, this paper established a coupled system model of reciprocating compressor cylinder block-piston assembly, proposed a transient calculation method applicable to the 3D compressor cylinder model, and studied and analyzed the heat transfer characteristics, deformation characteristics, and main factors influencing the deformation of each component in one cycle. The results show that the temperature of the compressor cylinder shows a “W”-type trend, with low temperature fluctuation; the stress and deformation of the cylinder block are almost unchanged, and the stress of the piston fluctuates greatly, with a maximum fluctuation of 14.37 MPa; the temperature and deformation of the compressor cylinder block-piston assembly show the distribution characteristics of ‘high out and low in’; the maximum deformation of the cylinder block at the extreme moment is 0.298 mm; the piston ring expands and deforms on the exhaust side, and shrinks on the intake side, the maximum deformation is 0.089 mm at the extreme moment; thermal load has a greater influence on the deformation of the working chamber and piston ring.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"56 ","pages":"Article 103044"},"PeriodicalIF":5.1,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654286","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

Role of constraint volume and heat flux on the design of evaporator tubes of steam generator by entropy generation minimization 通过熵生成最小化设计蒸汽发生器蒸发管时约束体积和热通量的作用

IF 5.1 3区工程技术

Thermal Science and Engineering Progress Pub Date : 2024-11-08 DOI: 10.1016/j.tsep.2024.103043

Md Naim Hossain , Koushik Ghosh

{"title":"Role of constraint volume and heat flux on the design of evaporator tubes of steam generator by entropy generation minimization","authors":"Md Naim Hossain , Koushik Ghosh","doi":"10.1016/j.tsep.2024.103043","DOIUrl":"10.1016/j.tsep.2024.103043","url":null,"abstract":"<div><div>This paper proposes a design methodology for evaporator tubes of a steam generator by applying the entropy generation minimization (EGM) approach. A two-phase flow-based entropy generation model for steam generator evaporator tubes is developed, with coolant volume as a constraint. For a target steam generation rate, the total entropy generation of the evaporator circuit is minimized using system volume and furnace heat flux as two constraints. It is observed that for a fixed steam generation rate, with increasing evaporator diameter, the furnace height decreases while the cross-sectional area increases. The analysis reveals that for a steam generation rate of 100 kg/s and a fixed circuit volume of 47 m<sup>3</sup>, increasing the heat flux from 36 to 50 kW/m<sup>2</sup> shifts the EGM point from an evaporator diameter of 62 mm to 84 mm, respectively. On the other hand, the minimum point shifts to a diameter of 43 mm when the heat flux is decreased to 25 kW/m<sup>2</sup>. The present study concludes that the selection of the constraint volume for designing the evaporator downcomer circuit for a target steam generation rate should be done based on the available furnace heat flux to choose the most efficient design.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"56 ","pages":"Article 103043"},"PeriodicalIF":5.1,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654285","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