Thermal Science最新文献_第3页

A comparative study on 3E (energy, exergy and economic) analysis of solar PV operated dome-shaped solar stills 太阳能光伏运行的圆顶型太阳能蒸馏器3E(能源、能源和经济)分析比较研究

IF 1.7 4区工程技术

Thermal Science Pub Date : 2023-01-01 DOI: 10.2298/tsci220502168p

Ragupathy Palaniappan, V. Murugesan, Kumaresan Govindasamy, Lakshmi Manirao

{"title":"A comparative study on 3E (energy, exergy and economic) analysis of solar PV operated dome-shaped solar stills","authors":"Ragupathy Palaniappan, V. Murugesan, Kumaresan Govindasamy, Lakshmi Manirao","doi":"10.2298/tsci220502168p","DOIUrl":"https://doi.org/10.2298/tsci220502168p","url":null,"abstract":"The present investigation centres on the empirical examination of a solar photovoltaic (PV) system that is integrated with a dome-shaped solar still (DSSS) in order to facilitate the process of desalination. The objective is to increase the production of freshwater through the utilisation of saline water at elevated temperatures. The assessment of the DSSS system's efficacy is conducted through the examination of various parameters, including water yield, energy, exergy, concentrator performance, and economic feasibility. The study's results demonstrate that the DSSS system's water yield, energy, and exergy were evaluated under varying inlet temperatures and mass flow rates. The study recorded the water yield, energy, and exergy at 4.73, 4.27, and 4.91 l/m?, respectively, with respect to the ambient inlet temperature. The water yield was observed to range from 6.9 to 7.7 litres per square metre under different input temperatures and air mass flow rates. The DSSS system's energy and exergy efficiency were evaluated, indicating encouraging results for various inlet air temperatures. Furthermore, the economic evaluation revealed that the rate of freshwater production was cost-effective in comparison to conventional solar stills. In summary, this research offers empirical proof of the efficacy of a solar photovoltaic-powered dome-shaped solar still for the purpose of desalination. It emphasises enhancements in the output of fresh water, energy and exergy efficiency, and the economic viability of this technology.","PeriodicalId":23125,"journal":{"name":"Thermal Science","volume":"1 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68243012","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

An optimized method for TTSV placement with non-uniform heat sources in 3D-IC 3D-IC中非均匀热源TTSV的优化布置方法

IF 1.7 4区工程技术

Thermal Science Pub Date : 2023-01-01 DOI: 10.2298/tsci220801021d

Feng Dai, Zhong-liang Pan

引用次数: 0

Linear frequency modulation infrared thermal imaging detection technology for GFRP/PMI foam sandwich structure defects 线性调频红外热成像检测GFRP/PMI泡沫夹层结构缺陷技术

IF 1.7 4区工程技术

Thermal Science Pub Date : 2023-01-01 DOI: 10.2298/tsci220806007s

Yanping Song, Q. Tang, Chi-wu Bu, Yumei Lu, Peng Xu

{"title":"Linear frequency modulation infrared thermal imaging detection technology for GFRP/PMI foam sandwich structure defects","authors":"Yanping Song, Q. Tang, Chi-wu Bu, Yumei Lu, Peng Xu","doi":"10.2298/tsci220806007s","DOIUrl":"https://doi.org/10.2298/tsci220806007s","url":null,"abstract":"As one of the important structures of composite materials, PMI foam sandwich structure is prone to debonding and delamination defects during manufacturing and service, which seriously affects the mechanical properties of materials. Therefore, it is necessary to detect the defects of foam sandwich structure. A linear frequency modulation (LFM) infrared thermal wave nondestructive testing system was built to study the correlation between the geometric characteristics (diameter and depth) of the defect and the surface temperature signal and its influence on the detection effect. The image sequence is processed by principal component analysis, discrete Fourier transform, thermal wave signal reconstruction and other algorithms. Studies have shown that: the larger the defect diameter, the shallower the depth, easy to detect defects, detection effect is good. The detection system can effectively detect and identify debonding and delamination defects. The thermal wave signal reconstruction method is superior to the principal component analysis method and the discrete Fourier transform method in the signal-to-noise ratio (SNR)index, which improves the quality of the image and is conducive to the effective identification of the image surface defect information.","PeriodicalId":23125,"journal":{"name":"Thermal Science","volume":"1 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68246422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

CFD analysis of the effect of internal peak angle and mass flow rates on the thermal performance of solar air heater with triangle cross-section 内峰角和质量流量对三角截面太阳能空气加热器热性能影响的CFD分析

IF 1.7 4区工程技术

Thermal Science Pub Date : 2023-01-01 DOI: 10.2298/tsci220918046a

Walid Amara, Yashar Aryanfar, H. Koten, A. Bouabidi, M. Chrigui, J. Alcaraz

{"title":"CFD analysis of the effect of internal peak angle and mass flow rates on the thermal performance of solar air heater with triangle cross-section","authors":"Walid Amara, Yashar Aryanfar, H. Koten, A. Bouabidi, M. Chrigui, J. Alcaraz","doi":"10.2298/tsci220918046a","DOIUrl":"https://doi.org/10.2298/tsci220918046a","url":null,"abstract":"A new design of Solar Air Heater (SAH) with triangle cross-section is numerically studied. The thermal performance of SAH is studied at various mass flow rates, inlet air temperatures and solar irradiation intensities. The CFD model is developed using the software ?ANSYS Fluent? to study the fluid flow and heat transfer in the solar air heater. 3D discretization is applied to study the thermal performance of solar collector with triangle cross section. Mesh independence is performed in order to choose the adequate mesh. The discrete ordinate radiation model (DOM) and the RNG k-? turbulence model are used to study the radiative heat transfer and the turbulent flow inside the SAH. Particularly, effects of different internal peak angles (145?,126?, 100?, 80? and 67.5?) under different solar irradiation intensities (from 620W/m^2 to 1081W/m^2) are studied to improve the thermal performance of the SAH. The results show a good agreement between the numerical model and the experimental data with an average error of 6%. The maximum outlet air temperature of the SAH reached 72?C for the geometries with 12 and 16 channels (Internal peak angles of 80? and 67.5?, respectively) under mass flow rate of 0.0264kg/s. The thermal performances of the SAH with 16 and 12 channels are 24.2% higher than standard geometry, respectively for solar irradiation intensity of 1081 W/m^2. The configuration with internal peak angle of 80? and 12 channels is selected as the optimal with a thermal efficiency of 79%, a low pressure drops compared to geometry with 16 channels and lower costs.","PeriodicalId":23125,"journal":{"name":"Thermal Science","volume":"1 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68248307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 1

Flame and emission characteristics from NH3/CH4 combustion under ultrasonic excitation 超声波激励下NH3/CH4燃烧火焰及发射特性

IF 1.7 4区工程技术

Thermal Science Pub Date : 2023-01-01 DOI: 10.2298/tsci221008029s

Yi Su, Yifeng Chen, Chunjie Sui, Tianjiao bi, Wei Chen, Bin Zhang

{"title":"Flame and emission characteristics from NH3/CH4 combustion under ultrasonic excitation","authors":"Yi Su, Yifeng Chen, Chunjie Sui, Tianjiao bi, Wei Chen, Bin Zhang","doi":"10.2298/tsci221008029s","DOIUrl":"https://doi.org/10.2298/tsci221008029s","url":null,"abstract":"As a high energy density hydrogen-rich carrier, ammonia (NH3) is a highly promising carbon-free fuel. The large-scale industrial application of NH3 is limited by its low reactivity and high nitrogen oxide (NOX) emission. In this work, the flame and emission characteristics of ammonia/methane (NH3/CH4) non-premixed combustion were investigated under ultrasonic excitation. An experimental system was designed and built, including non-premixed combustion system, loading ultrasonic system, deflection tomography temperature measurement system and flue gas measurement system. Combustion and measurement experiments at different ultrasonic frequencies and NH3/CH4 blending ratios were carried out. Flame images and flue gas species concentrations under ultrasonic excitation were acquired. The 3D temperature field was reconstructed. The influence of ultrasonic excitation at different frequencies on flame characteristics, flame temperature field and emission characteristics of the combustion process was analysed. The mechanism of NH3/CH4 combustion enhancement and emission reduction was revealed when the flame was excited by ultrasonic waves. Results showed that part of the hydrocarbon fuels was replaced by NH3 to reduce carbon dioxide (CO2) emission. The height and colour of the NH3/CH4 flame were changed and the high-temperature area of the flame gradually expanded as ultrasonic acted on the flame. As ultrasonic frequency increased, the emission concentrations of unburned CH4, unburned NH3 and NO decreased significantly. The flame was excited by ultrasonic waves, which reduced its local equivalent ratio, improved combustion efficiency and suppressed NOX generation.","PeriodicalId":23125,"journal":{"name":"Thermal Science","volume":"1 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68249102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 1

Thermodynamic analysis and optimization design of cooling plate with multiple channels for linear synchronous motor 直线同步电机多通道冷却板的热力学分析与优化设计

IF 1.7 4区工程技术

Thermal Science Pub Date : 2023-01-01 DOI: 10.2298/tsci221111053d

F. Du, Yang Bo, Tangjia Zhang

引用次数: 0

Special solutions for the Laplace and diffusion equations associated with the algebraic number field 与代数数场相关的拉普拉斯方程和扩散方程的特殊解

IF 1.7 4区工程技术

Thermal Science Pub Date : 2023-01-01 DOI: 10.2298/tsci221113006y

Xiao-jun Yang, N. Sweilam, M. Bayram

引用次数: 0

The influence of temperature on geothermal power plant performance based on geology in Huangshadong geothermal field, China 基于地质的黄沙洞地热田温度对地热发电厂性能的影响