International Communications in Heat and Mass Transfer最新文献_第5页

Flow boiling heat transfer of new refrigerant blends: Experimental data in a microchannel and modelling 新型混合制冷剂的流动沸腾传热：微通道中的实验数据和建模

IF 6.4 2区工程技术

International Communications in Heat and Mass Transfer Pub Date : 2025-04-15 DOI: 10.1016/j.icheatmasstransfer.2025.108929

Nicolò Mattiuzzo, Marco Azzolin, Arianna Berto, Stefano Bortolin, Davide Del Col

{"title":"Flow boiling heat transfer of new refrigerant blends: Experimental data in a microchannel and modelling","authors":"Nicolò Mattiuzzo, Marco Azzolin, Arianna Berto, Stefano Bortolin, Davide Del Col","doi":"10.1016/j.icheatmasstransfer.2025.108929","DOIUrl":"10.1016/j.icheatmasstransfer.2025.108929","url":null,"abstract":"<div><div>Mixtures of hydrofluorocarbons (HFCs) and hydrofluoroolefins (HFOs) are suitable as drop-in substitutes in refrigeration and air conditioning, due to the low global warming potential (GWP) and desired thermodynamic properties. In the present work, the flow boiling heat transfer of four HFOs/HFCs mixtures has been studied inside a 0.96 mm diameter channel. Three of those mixtures, R513A (R1234yf/R134a, 56/44 % by mass, GWP<sub>100-y</sub> = 629), R516A (R1234yf/R152a/R134a 77.5/14/8.5 % by mass, GWP<sub>100-y</sub> = 131) and R515B (R1234ze(E)/R227ea, 91/9 % by mass, GWP<sub>100-y</sub> = 299), are azeotropic mixtures, while the fourth is quasi-azeotropic mixture R450A (R1234ze(E)/R134a, 56/44 % by mass, GWP<sub>100-y</sub> = 547, <em>ΔT</em><sub><em>GL</em></sub> = 0.63 K at 30 °C). The experimental campaign was conducted using a test section where the flow boiling is promoted by a secondary fluid, at 30 °C mean saturation temperature and mass flux between 300 kg m<sup>−2</sup> s<sup>−1</sup> and 600 kg m<sup>−2</sup> s<sup>−1</sup>. The present data have been compared with the heat transfer coefficient of R134a, in order to assess the suitability of its drop-in substitutes. From the comparison between experimental data and the predictions from some semi-empirical models, a modified method is presented. The new flow boiling heat transfer correlation has been successfully tested with data of propane, propylene, R32 and R1234yf.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"164 ","pages":"Article 108929"},"PeriodicalIF":6.4,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143828486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Efficient flow boiling in wedge-shaped manifold microchannels for high heat flux chips cooling 用于高热流量芯片冷却的楔形歧管微通道中的高效沸流

IF 6.4 2区工程技术

International Communications in Heat and Mass Transfer Pub Date : 2025-04-15 DOI: 10.1016/j.icheatmasstransfer.2025.108964

Xinyu Ji, Yuantong Zhang, Xiaoping Yang, Chuansheng Su, Jinjia Wei

{"title":"Efficient flow boiling in wedge-shaped manifold microchannels for high heat flux chips cooling","authors":"Xinyu Ji, Yuantong Zhang, Xiaoping Yang, Chuansheng Su, Jinjia Wei","doi":"10.1016/j.icheatmasstransfer.2025.108964","DOIUrl":"10.1016/j.icheatmasstransfer.2025.108964","url":null,"abstract":"<div><div>The flow boiling experiments are conducted using HFE-7100 as coolant to comprehensively investigate flow patterns, hydraulic characteristics and heat transfer performance in manifold microchannels with conventional manifolds (CMMC) and wedge-shaped manifolds (WMMC). The wedge-shaped manifolds microchannels demonstrates superior performance by facilitating flow pattern transition from churn flow to annular flow, significantly improving vapor distribution uniformity along the outlet manifold, and enhancing vapor discharge efficiency. Benefiting from these advantages, wedge-shaped manifold microchannels combine lower flow pressure drop, higher boiling heat transfer coefficient and greater critical heat flux. Compared to CMMC, the pressure drops of WMMC are reduced by 17.4 % - 29 %, the heat transfer coefficients are increased by 12.4 % - 37.3 %, and the critical heat fluxes are increased by 11.6 % - 28 %. However, both manifold configurations experience flow instability due to intermittent dry-out on the microchannel walls at high heat fluxes. In WMMC, both flow pattern transitions and flow instability trigger volumetric flow rate oscillations, which can be effectively mitigated by reducing inlet subcooling. These findings provide valuable insights for optimizing two-phase manifold microchannel in applications.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"164 ","pages":"Article 108964"},"PeriodicalIF":6.4,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143834024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Drag and heat reduction mechanism on a novel combination of spike and micro porous jet concept in supersonic/hypersonic flows 超声速/高超声速流动中新型尖峰与微孔射流组合的减阻减热机理

IF 6.4 2区工程技术

International Communications in Heat and Mass Transfer Pub Date : 2025-04-15 DOI: 10.1016/j.icheatmasstransfer.2025.108955

Yu-shan Meng, Zhong-wei Wang, Zan Xie, Wei Huang, Yao-bin Niu, Ya-jie Liang

{"title":"Drag and heat reduction mechanism on a novel combination of spike and micro porous jet concept in supersonic/hypersonic flows","authors":"Yu-shan Meng, Zhong-wei Wang, Zan Xie, Wei Huang, Yao-bin Niu, Ya-jie Liang","doi":"10.1016/j.icheatmasstransfer.2025.108955","DOIUrl":"10.1016/j.icheatmasstransfer.2025.108955","url":null,"abstract":"<div><div>For blunt forebodies flying at supersonic/hypersonic Mach numbers, spike-based concept is widely adopted for simple implementation and economic among various drag and thermal reduction approaches. In this paper, numerical simulation on a mechanical spike attached to a blunt body with micro porous jet is carried out, and the compressible turbulent three-dimensional Navier-Stokes equations are solved with <em>k</em>-<em>ω</em> (SST) turbulence model to compute the typical flow field. The effectiveness of drag reduction and thermal protection is systematically evaluated across varying jet pressure ratios (<em>PR</em>) at different flight altitudes (<em>H</em> = 1 km, 10 km and 27 km) and freestream Mach numbers (<em>Ma</em><sub><em>∞</em></sub> = 4.09, 4.77 and 5.15). When freestream conditions are taken to correspond to a flight speed of <em>Ma</em> = 6 and at an altitude of 27 km, the novel combination configuration with <em>PR</em> = 0.2 can provide drag and heat reduction effect on the spiked forebody by 61.3 % and 73.7 %, respectively. The physics behind the drag reduction and thermal protection associated with the composite configuration is presented with clarity. It is reported that the aerodynamic drag over the spiked blunt model is decreased with rising mass flow rate, and this performance is qualitatively similar for all Mach numbers. Considering that the total drag force increases continuously at large <em>PR</em> and exceeds that with low <em>PR</em>, this study also portrays the necessity of taking the additional jet drag into consideration while comparing the total drag force for different cases.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"164 ","pages":"Article 108955"},"PeriodicalIF":6.4,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143828483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 enhancement of flat plate heat exchangers through baffle integration: Thermal, flow, and entropy analysis 通过挡板集成提高平板热交换器的性能：热、流和熵分析

IF 6.4 2区工程技术

International Communications in Heat and Mass Transfer Pub Date : 2025-04-15 DOI: 10.1016/j.icheatmasstransfer.2025.108937

M. Nithya , M. Senthil Vel , C. Sivaraj

{"title":"Performance enhancement of flat plate heat exchangers through baffle integration: Thermal, flow, and entropy analysis","authors":"M. Nithya , M. Senthil Vel , C. Sivaraj","doi":"10.1016/j.icheatmasstransfer.2025.108937","DOIUrl":"10.1016/j.icheatmasstransfer.2025.108937","url":null,"abstract":"<div><div>The Plate Heat Exchangers (PHEs) are of essential integral component in industries in diverse aspects and can handle even the minimal temperature differential. This study builds on previous research in a 500 × 2 MW Thermal Power Plant by introducing novel baffle designs in PHEs for the first time. These baffles were specifically developed to address the intricate geometry and complex flow dynamics of PHEs. Building on our previous work, an in-depth analysis was conducted to assess entropy generation, shear stress distribution, and the impact of these baffles on flow maldistribution and thermal performance, as quantified by the JF factor. The study employs the Realizable k-ε turbulence model with scalable wall functions, using the PISO algorithm for pressure-velocity coupling, with a second-order approximation for momentum transport equations and a first-order for turbulence equations. Results indicate a remarkable boost of 11.5 times thermal performance enhancement compared to conventional model. The wedge type experienced a turbulent kinetic energy (TKE) increase of up to 15 %, while the aerofoil exhibited a decrease of 18 %. Additionally, Witte-Shamsundar efficiency was evaluated and advanced regression models were used to predict the Nusselt number and skin friction coefficient, with Gaussian Process Regression (GPR) emerging as the most reliable model. The findings highlight the aerofoil baffles exhibited stable and consistent performance across multiple parameters unlike wedge baffles, enhancing heat exchanger performance along with effective energy utilization.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"164 ","pages":"Article 108937"},"PeriodicalIF":6.4,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143828616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Investigating the use of nano-enhanced phase change material in floor heating system: A numerical approach 研究纳米增强相变材料在地板采暖系统中的应用：数值方法

IF 6.4 2区工程技术

International Communications in Heat and Mass Transfer Pub Date : 2025-04-15 DOI: 10.1016/j.icheatmasstransfer.2025.108962

Mohammad Kamrava , Mohammad Ali Fazilati , Davood Toghraie

{"title":"Investigating the use of nano-enhanced phase change material in floor heating system: A numerical approach","authors":"Mohammad Kamrava , Mohammad Ali Fazilati , Davood Toghraie","doi":"10.1016/j.icheatmasstransfer.2025.108962","DOIUrl":"10.1016/j.icheatmasstransfer.2025.108962","url":null,"abstract":"<div><div>By increasing the environmental concerns and the scarcity of fossil fuel resources, it is imperative to explore new ways for curbing energy consumption. Among the pivotal strategies aimed at mitigating thermal energy consumption, the utilization of phase change materials (<em>PCM</em>s) stands out prominently. In this study, we delve into the intricacies of floor heating systems and study the effects of incorporating nano-enhanced <em>PCM</em> (<em>NEPCM</em>) on the performance of the system. The work investigates the dynamic behavior of the floor heating system and the temporal characteristics with and without implementing <em>PCM</em>. <em>Al</em><sub>2</sub><em>O</em><sub>3</sub>, <em>ZnO</em> and <em>CuO</em> are the employed nanoparticles (<em>NP</em>s) whose effect is examined at volume percentages of 1 % and 3 %. The results show that the <em>NP</em> employment reduced the melting start time by 23 % for all employed <em>NP</em> types; also, the time of complete melted state, increased approximately by 369.11 min, followed by a discharge period increment of 454.55 min. By increasing the <em>NP</em> concentration from 1 to 3 %, there was a noticeable reduction for the time of the complete melting; also, the thermal response time of the floor heating decreased by 2 % which was attributed to the elevated thermal conductivity of the <em>PCM</em>.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"164 ","pages":"Article 108962"},"PeriodicalIF":6.4,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143828617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Prediction of 2D film cooling effectiveness distribution: A generative neural network with physical prior knowledge 预测二维薄膜冷却效果分布：具有物理先验知识的生成神经网络

IF 6.4 2区工程技术

International Communications in Heat and Mass Transfer Pub Date : 2025-04-14 DOI: 10.1016/j.icheatmasstransfer.2025.108956

Hao-nan Yan , Cun-liang Liu , Lin Ye , Han-Qing Liu , Si-wei Su , Li Zhang

{"title":"Prediction of 2D film cooling effectiveness distribution: A generative neural network with physical prior knowledge","authors":"Hao-nan Yan , Cun-liang Liu , Lin Ye , Han-Qing Liu , Si-wei Su , Li Zhang","doi":"10.1016/j.icheatmasstransfer.2025.108956","DOIUrl":"10.1016/j.icheatmasstransfer.2025.108956","url":null,"abstract":"<div><div>Film cooling is an essential thermal protection technology that directly influences the performance of hot-end components. Its effectiveness affects combustion efficiency and significantly influences pollutant and carbon emissions during combustion. Consequently, the rapid design and evaluation of cooling schemes have become critical research priorities. Traditional neural network prediction models, however, demand large datasets, with data acquisition costs often being high. This study integrates physically meaningful prior knowledge with image encoding and decoding modules that utilize multi-head attention mechanisms. The goal is to enhance the prediction accuracy of the two-dimensional distribution of film cooling effectiveness (<span><math><mi>η</mi></math></span>) with limited sample sizes. Furthermore, a highly reliable PSP measurement system was developed to substitute for sample sets generated by CFD simulations. The results indicate that, compared to the traditional model with prediction errors for <span><math><mi>η</mi></math></span> and non-uniformity (<span><math><mi>σ</mi></math></span>) exceeding 50 %, the proposed model can control the prediction accuracy within the range of 5 % to 15 %. Furthermore, the integration of encoding and decoding modules with a multi-head attention mechanism allows the model to excel in predicting local distributions while also improving its generalization ability. The gradient-based sensitivity analysis on the input structural parameters revealed that three factors—spacing P, exit width, and inlet-to-outlet area ratio—exhibit more pronounced effects on <span><math><mi>η</mi></math></span>.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"164 ","pages":"Article 108956"},"PeriodicalIF":6.4,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143825955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Impact of fractional derivative on the distribution of concentration injected from the walls in diverging channel 分数阶导数对分流通道壁面注入浓度分布的影响

IF 6.4 2区工程技术

International Communications in Heat and Mass Transfer Pub Date : 2025-04-14 DOI: 10.1016/j.icheatmasstransfer.2025.108932

M. Tolami , A. Nazari-Golshan , S.S. Nourazar

{"title":"Impact of fractional derivative on the distribution of concentration injected from the walls in diverging channel","authors":"M. Tolami , A. Nazari-Golshan , S.S. Nourazar","doi":"10.1016/j.icheatmasstransfer.2025.108932","DOIUrl":"10.1016/j.icheatmasstransfer.2025.108932","url":null,"abstract":"<div><div>This study examines the influence of fractional derivatives on the concentration distribution in the flow of a Newtonian fluid within a divergent channel with wall injection. The governing equations, originally formulated with integer derivatives in the radial direction, were modified using Caputo fractional derivatives. These transformed equations were converted into ordinary differential equations through similarity transformations and solved using the Adaptive Fraction Method (AFM) and numerical techniques. Key parameters, including the Reynolds number (<em>Re</em>), Peclet number (<em>Pe</em>), and fractional derivative orders<span><math><mi>β</mi></math></span>and<span><math><mi>ξ</mi></math></span>, were analyzed to assess their effects on flow dynamics and concentration profiles. The results indicate that increasing <em>Re</em> and<span><math><mi>β</mi></math></span>enhances the dimensionless radial velocity and velocity at the channel center while reducing them near the walls. As Re increases, the dimensionless concentration significantly decreases at the center, showing a minor rise near the walls. A surge in<span><math><mi>ξ</mi></math></span> causes a slight decrease in concentration across the channel, whereas increasing <span><math><mi>Pe</mi></math></span>reduces concentration in a localized central region with minimal impact elsewhere. Additionally, higher<span><math><mi>ξ</mi></math></span>values enhance concentration throughout the channel. These findings provide insights for optimizing fluid systems in mass transfer, heat transfer, and flow control by leveraging fractional derivatives to model non-local and memory effects in fluid flow phenomena.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"164 ","pages":"Article 108932"},"PeriodicalIF":6.4,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143825966","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Potentials of porous materials and thermal control system for performance enhancement of humidification-dehumidification desalination unit powered by solar dish collector: Experimental study with 4E analysis 多孔材料和热控系统对太阳能集热器加湿-除湿海水淡化装置性能提升的影响：基于4E分析的实验研究

IF 6.4 2区工程技术

International Communications in Heat and Mass Transfer Pub Date : 2025-04-14 DOI: 10.1016/j.icheatmasstransfer.2025.108958

Ali Mahmoudi , Mohammad Sadegh Valipour , Saman Rashidi

{"title":"Potentials of porous materials and thermal control system for performance enhancement of humidification-dehumidification desalination unit powered by solar dish collector: Experimental study with 4E analysis","authors":"Ali Mahmoudi , Mohammad Sadegh Valipour , Saman Rashidi","doi":"10.1016/j.icheatmasstransfer.2025.108958","DOIUrl":"10.1016/j.icheatmasstransfer.2025.108958","url":null,"abstract":"<div><div>A sustainable solution to water shortage crises is desalination technology. Solar-based humidification-dehumidification desalination systems are a cost-effective method of providing water in remote areas. In the current study, a solar parabolic dish collector-powered humidification-dehumidification desalination system was studied experimentally. An auxiliary heater with a controller box was used to maintain the system temperature at higher feed water flow rates. The main test scenarios were different feed water flow rates at different salinity values. This study evaluates the use of machining metal scraps as a porous material's effects on the system's dehumidifier. Based on the results, for the feed saline water flow rate of 1.2 <em>l/</em>min and salinity value of 5000 <em>ppm</em>, the maximum gain output ratio and specific energy consumption of 0.24 and 3.48 <em>kWh/m</em><sup><em>3</em></sup> were calculated for the desalination system. The utilization of porous material in the dehumidifier enhanced the thermal efficiency of the desalination cycle by 1.49 %, from 8.06 % to 9.55 %. The freshwater production flow rate was improved from 3.95 to 4.76 <em>l/day</em>. According to the economic and environmental analysis, the freshwater production cost was calculated at 0.043 <em>USD/l</em>, and the application of the porous material in the dehumidifier enhanced carbon dioxide emissions reduction by 0.14 tons.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"164 ","pages":"Article 108958"},"PeriodicalIF":6.4,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143825967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Comprehensive review of green roof and photovoltaic-green roof systems for different climates to examine the energy-saving and indoor thermal comfort 全面审查不同气候条件下的绿色屋顶和光伏-绿色屋顶系统，研究其节能效果和室内热舒适度

IF 6.4 2区工程技术

International Communications in Heat and Mass Transfer Pub Date : 2025-04-14 DOI: 10.1016/j.icheatmasstransfer.2025.108946

Xiayan Liao , Ali B.M. Ali , Narinderjit Singh Sawaran Singh , Mohammadreza Baghoolizadeh , Mohammad Mahtab Alam , Tatyana Orlova , Soheil Salahshour , As'ad Alizadeh

{"title":"Comprehensive review of green roof and photovoltaic-green roof systems for different climates to examine the energy-saving and indoor thermal comfort","authors":"Xiayan Liao , Ali B.M. Ali , Narinderjit Singh Sawaran Singh , Mohammadreza Baghoolizadeh , Mohammad Mahtab Alam , Tatyana Orlova , Soheil Salahshour , As'ad Alizadeh","doi":"10.1016/j.icheatmasstransfer.2025.108946","DOIUrl":"10.1016/j.icheatmasstransfer.2025.108946","url":null,"abstract":"<div><div>Built-up regions are increasingly at risk from climate change and urban heat islands (UHIs). Solar panels and green roof systems (PV/GR) can provide several advantages to support ecologically sustainable cities. Research gaps in hot climates at the building and urban sizes are highlighted in this study, which examines the advantages of GR and combined PV/GR systems as well as their optimal design parameters. An extensive analysis of published works from the Scopus database was conducted to examine how energy-saving and indoor thermal comfort (UH-ES-ITC) was accomplished in urban structures, as well as the impact of green roofs (GR) and photovoltaic/GR systems on UHI mitigation. It's been found that, especially at building scale, GR and GR/PV systems enhance notable qualities in hot, dry locations. Sadly, not much research has been done on GR/PV systems on coupling scales. Among the research gaps identified in this study are those related to the methodology, scope, climate, objectives, variables, and features of this integration in different climate zones. Researchers and urban planners might use the findings to inform future research directions and implementation.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"164 ","pages":"Article 108946"},"PeriodicalIF":6.4,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143826084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Low frequency thermal stability of the TianQin inertial sensor 天琴惯性传感器的低频热稳定性

IF 6.4 2区工程技术

International Communications in Heat and Mass Transfer Pub Date : 2025-04-12 DOI: 10.1016/j.icheatmasstransfer.2025.108960

Fulong Wei , Xiaobing Luo , Shaobo Qu , Li Liu , Xingyu Yan , Yupeng Zhou , Xin Zhao , Jinlong Ma , Zebing Zhou

{"title":"Low frequency thermal stability of the TianQin inertial sensor","authors":"Fulong Wei , Xiaobing Luo , Shaobo Qu , Li Liu , Xingyu Yan , Yupeng Zhou , Xin Zhao , Jinlong Ma , Zebing Zhou","doi":"10.1016/j.icheatmasstransfer.2025.108960","DOIUrl":"10.1016/j.icheatmasstransfer.2025.108960","url":null,"abstract":"<div><div>Temperature fluctuation is a major disturbance for the space-based gravitational wave detectors, especially for the strain sensitivity of the TianQin inertial sensor. Comprehensive low-frequency thermal stability of the inertial sensor are essential inputs to the thermal design and the thermal diagnostics. However, the relative contributions of the different heat transfer effects within the vacuum chamber, as well as the effect of rarefied gas, remain undefined. In this work, the various heat transfer processes are decoupled and analyzed, particularly the rarefied gas heat transfer based on the frequency domain thermal framework. The results indicate that the thermal radiation accounts for only 4.55 % of the total heat transfer within the inertial sensor, and the rarefied gas heat transfer contributes even less. In order to meet the error budget, the temperature fluctuations along the x-axis direction of the vacuum chamber in the inertial sensor should be limited to 1 mK/Hz<sup>1/2</sup>. Moreover, the thermocouples on the vacuum chamber should be arranged in pairs.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"164 ","pages":"Article 108960"},"PeriodicalIF":6.4,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143823956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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