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Mathematical modelling of cylindrical chimney effect in solar dryer 太阳能干燥机筒形烟囱效应的数学建模
Hungarian Agricultural Engineering Pub Date : 1900-01-01 DOI: 10.17676/hae.2019.36.69
G. Habtay, J. Buzás, I. Farkas
{"title":"Mathematical modelling of cylindrical chimney effect in solar dryer","authors":"G. Habtay, J. Buzás, I. Farkas","doi":"10.17676/hae.2019.36.69","DOIUrl":"https://doi.org/10.17676/hae.2019.36.69","url":null,"abstract":"A simple mathematical model of a solar chimney is proposed for the solar dryer. The physical model was made with a cylindrical channel. Outer surface of the chimney is provided with black paint which absorbing solar radiation to heat up the air inside the chimney. Openings provided at the bottom and top of the chimney allow moist air to enter from the drying chamber and leave the channel. Steady state heat transfer equations were set determining the heat transfer coefficient and the air flow in the chimney. The thermal performance of the solar chimney as determined from the surfaces, air temperatures, and air mass flow rate are presented.","PeriodicalId":104429,"journal":{"name":"Hungarian Agricultural Engineering","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130421206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
The relation between online protection regulations and the intention to ‎use e-services/age perspective : A case study from Hungary 网络保护法规与使用电子服务意愿/年龄观点之间的关系:匈牙利个案研究
Hungarian Agricultural Engineering Pub Date : 1900-01-01 DOI: 10.17676/HAE.2020.38.15
Pierre Alassaf, Miriam Bahna, Basem Munir El-assaf
{"title":"The relation between online protection regulations and the intention to ‎use e-services/age perspective : A case study from Hungary","authors":"Pierre Alassaf, Miriam Bahna, Basem Munir El-assaf","doi":"10.17676/HAE.2020.38.15","DOIUrl":"https://doi.org/10.17676/HAE.2020.38.15","url":null,"abstract":": As more regulations to protect privacy and security for online interactions is carrying out, as more complications to perform these transactions is coming forward, affecting the intention to execute these interactions online especially for old people. This study aims to reveal the relation between intention to use high secured e-services with the age of user. This study finds that there is a positive relation between the over-40 years online users’ ages and their retreating from completing online transactions due the complications of security and privacy procedures. Also, the study finds that 85% of people feel more comfortable to execute their transactions online with the high secure regulation, but from another perspective, 60% of persons between 40- 55 years old don’t prefer doing their transactions online due to the complication of transaction security procedures, where 92% of people over 65 are avoiding to do financial transaction online and they need another person help to perform it more than 82% of times.","PeriodicalId":104429,"journal":{"name":"Hungarian Agricultural Engineering","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130510350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Assessment and Modeling of Industrial-Scale Solar Thermal System Application in Hungary 匈牙利工业规模太阳能热系统应用评估与建模
Hungarian Agricultural Engineering Pub Date : 1900-01-01 DOI: 10.17676/hae.2021.40.70
Rajab Ghabour, P. Korzenszky
{"title":"Assessment and Modeling of Industrial-Scale Solar Thermal System Application in Hungary","authors":"Rajab Ghabour, P. Korzenszky","doi":"10.17676/hae.2021.40.70","DOIUrl":"https://doi.org/10.17676/hae.2021.40.70","url":null,"abstract":"With approximately 1.2% growth annually, the industrial sector accounts for 54% of the total consumed energy globally. Most of those facilities use fossil fuels to generate their needs. Renewable energies, mainly solar energy, can play a major role in meeting the global policies of reducing carbon dioxide emissions. Presently, Hungarian researchers exploit more energy from renewable energies such as solar sources, wind, and biomass. Knowing that reducing the carbon emission level is a general tendency in Hungary. This article presents an extensive analysis of the solar thermal system in the central European climate, especially in Hungary. The scope of this study is the low-to-medium heat generation in industries such as pharmaceutical, pulp & paper textile, food processing and beverages. Through all the applications, the heat is consumed in hot water form. Integrating solar thermal technology in the industrial sector depends mainly on solar radiation, conventional fuel prices, available installation area, and the complexity level of integrating the solar system with the existing process. Furthermore, more challenges show up during the integration of economic difficulties. This article analyses the feasibility of providing industrial hot water for small-to-medium enterprises (SMEs) in different Hungarian counties. The analysis was performed using T*Sol 5.5 software, and metrological data were obtained by MeteoSyn built-in software. Results indicate that the most suitable region for integrating solar thermal energy was Szeged, Szolnok, and Kecskemet, which supplied 54.89%, 54.16%, and 54.03% of the total heat load for the studied case, respectively. This result accounts for 849.57, 840.25 and 839.27 kWh/m2 of specific generated heat of the solar system. In addition, it results in points that the annual carbon dioxide saved amount is up to 4,442.3 kg and 2,100.7 m3 annual amount of natural gas. In conclusion, Hungary has a potentially attractive market for solar thermal systems to provide industrial hot water for small and medium-sized factories.","PeriodicalId":104429,"journal":{"name":"Hungarian Agricultural Engineering","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116590817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dehydrating Using Combined Energy Intake Method 联合能量摄入法脱水
Hungarian Agricultural Engineering Pub Date : 1900-01-01 DOI: 10.17676/hae.2022.41.24
V. Madár, János Gubó, L. Toth
{"title":"Dehydrating Using Combined Energy Intake Method","authors":"V. Madár, János Gubó, L. Toth","doi":"10.17676/hae.2022.41.24","DOIUrl":"https://doi.org/10.17676/hae.2022.41.24","url":null,"abstract":"Our paper introduces the research and development of a new, continuously operational food dehydrator, and the prototype of said machine. Conditions related to heating technology are required for dehydrators that prevent the vegetables and fruits from suffering too much damage to their internal components. In the new system, traditional convective heat transfer was combined with microwave dehydration, which is well-known for its better efficiency. The final goal is to create an industrial system that can satisfy both small works and industrial demands, while being more energy efficient than traditional solutions, and has faster dehydration potential. However, at the same time, due to dehydrating on lower temperature, it should end up in a gentler drying process. It is fundamental to keep the valuable components of the products intact. The system is continuously operational. The material is sent via conveyor belt through the canal, while magnetrons are operating, and low- heat and moisture airflow is moving above it. Materials dried with the machine were evaluated by the Institute of Horticulture, at the Hungarian University of Agriculture and Life Sciences s (MATE).","PeriodicalId":104429,"journal":{"name":"Hungarian Agricultural Engineering","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123113698","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Testing axial flow solar chimney turbine using wind tunnel 利用风洞试验轴流太阳能烟囱涡轮机
Hungarian Agricultural Engineering Pub Date : 1900-01-01 DOI: 10.17676/hae.2021.40.59
W. M. Elmagid
{"title":"Testing axial flow solar chimney turbine using wind tunnel","authors":"W. M. Elmagid","doi":"10.17676/hae.2021.40.59","DOIUrl":"https://doi.org/10.17676/hae.2021.40.59","url":null,"abstract":"The solar chimney power plant (SCPP) is a modernistic and promising technology, which utilizes the combination of solar heating and chimney effect for producing electricity. Solar collector, updraft tower and air turbine are the main components of a solar chimney unit, however, the turbine plays a royal role because it converts the kinetic energy of the heating air into useful mechanical energy. In this study, I measured the power, flow rate, rotational speed and pressure drop of the designed and industrial turbines within the wind tunnel, and the power coefficient of the turbines are calculated by measured values. The turbine was designed according to the blade element theory modified to consider the surrounding duct. we measured the electric power, flow rate and pressure drop of the turbine, and the power coefficient of the turbine is calculated by measured values. Testing of the designed and industrial turbine within wind tunnel shows that the highest power coefficient of the designed turbine is 0.45, while the highest power coefficient of the industrial turbine is 0.32. The designed turbine produces 28.89% higher than the industrial one.","PeriodicalId":104429,"journal":{"name":"Hungarian Agricultural Engineering","volume":" 46","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120827097","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Utilizing machine learning techniques to process customer claims automatically 利用机器学习技术自动处理客户索赔
Hungarian Agricultural Engineering Pub Date : 1900-01-01 DOI: 10.17676/hae.2019.36.15
S. Sader
{"title":"Utilizing machine learning techniques to process customer claims automatically","authors":"S. Sader","doi":"10.17676/hae.2019.36.15","DOIUrl":"https://doi.org/10.17676/hae.2019.36.15","url":null,"abstract":"In this paper, Supervised Machine Learning was used to develop a new approach to handle customers’ claims which were gathered from a real-case company. Supervised machine learning was used with accurate data in order to develop a machine learning model. This model was deployed and used to evaluate new un-evaluated claims by examining their content variables and assigning a ranking value for each claim expressing its priority. The goal of this experiment was to show evidence on the ability of new technologies such as Machine Learning to automate quality management traditional activities, improve efficiency and effectiveness, and support a new approach to “Quality 4.0”. Other goals were to improve customer satisfaction by enhancing responsiveness to their claims and to convince the company (the real case of this study) to extend the project for further applications.","PeriodicalId":104429,"journal":{"name":"Hungarian Agricultural Engineering","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115007631","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Detection of the efficiency of enzymatic hydrolysis and fermentation processes by dielectric measurement 电介质法测定酶解和发酵过程的效率
Hungarian Agricultural Engineering Pub Date : 1900-01-01 DOI: 10.17676/hae.2020.37.21
S. Beszédes, Z. Jákói, Balázs Lemmer, I. Czupy, C. Hodúr
{"title":"Detection of the efficiency of enzymatic hydrolysis and fermentation processes by dielectric measurement","authors":"S. Beszédes, Z. Jákói, Balázs Lemmer, I. Czupy, C. Hodúr","doi":"10.17676/hae.2020.37.21","DOIUrl":"https://doi.org/10.17676/hae.2020.37.21","url":null,"abstract":": In our work the efficiency of enzymatic degradation of cellulosic biomass was investigated by conventional analytical methods and dielectric measurements. Our results show, that the dielectric measurements proved to be efficient and rapid method to detect the chemical and physicochemical change of biomass during the enzymatic hydrolysis of cellulose. Because of molecular weight decreasing, and the increasing of the concentration of polar and ionic components, the polarization ability of the system has been changed, what manifested in the change of dielectric parameters. Furthermore, dielectric measurements were suitable to detect the efficiency of biomass pre-treatment, as well.","PeriodicalId":104429,"journal":{"name":"Hungarian Agricultural Engineering","volume":"395 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132068147","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Technical and Technological Parameters of ISOBUS System Supported Machinery Management ISOBUS系统支持的机械管理技术参数
Hungarian Agricultural Engineering Pub Date : 1900-01-01 DOI: 10.17676/hae.2019.35.34
L. Magó, I. Kovacs
{"title":"Technical and Technological Parameters of ISOBUS System Supported Machinery Management","authors":"L. Magó, I. Kovacs","doi":"10.17676/hae.2019.35.34","DOIUrl":"https://doi.org/10.17676/hae.2019.35.34","url":null,"abstract":"ISO organization in early 90s defined an industry standard for the communication protocol among electronic devices of different manufacturers of agricultural machines. After that, all of the market actors recognised that this technology would be very important for agricultural electronics. The appearance of ISOBUS products in the market was in the mid-2000s. ISOBUS description could be found in ISO-11783. It is a very complex and large electronics protocol standard based on CAN and SAE-J1939 standards, extended for the Agricultural Industry. The standard consists of 14 different parts and more than thousands of specification pages. Through the standards and the related technical background, the production processes and the operations could be followed and monitored by the extensive Data Management. Farmers' and users legitimate needs and developing goal is to elaborate a decision support systems that follow-up the utilisation of the machines and ensure the quality of operations. For this purpose, it is essential to determine which technical, economical, technological parameters, detection, measurement, transmission, processing, and evaluation becomes necessary. In our work, we reviewed which mechanical characteristics, settings are monitored within the ISOBUS system by the major machine manufacturers. We developed the system of parameters and derived features that provide effective farm-, and land-management in case of attached equipment for spreading of input materials and tillage implements.","PeriodicalId":104429,"journal":{"name":"Hungarian Agricultural Engineering","volume":"26 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128399067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Application of Two Techniques Used for Measuring the Soil Strength : A Review 两种土壤强度测量技术的应用综述
Hungarian Agricultural Engineering Pub Date : 1900-01-01 DOI: 10.17676/hae.2021.39.29
N. D. Salman, P. Kiss
{"title":"Application of Two Techniques Used for Measuring the Soil Strength : A Review","authors":"N. D. Salman, P. Kiss","doi":"10.17676/hae.2021.39.29","DOIUrl":"https://doi.org/10.17676/hae.2021.39.29","url":null,"abstract":"This paper reviews the application of two techniques are used for the measurement of soil strength. The two techniques (cone penetrometer and bevameter) enable measurements to be made in situ. However, the penetrometer is the only equipment that can evaluate soil resistance variation with depth. Neither the cone index nor the gradient that belongs to it concerning the depth is uniquely associated with density or soil cohesion but varies with structural state and moisture content. Moreover, the formation of compaction zones and soil bodies ahead of the cone efficiently alters its geometry, thus the penetration no longer reveals the original characteristics of the soil. Furthermore, the bevameter technique only identifies surface soil properties. Nonetheless, among all the presently available techniques, the bevameter gives the closest imitation of vehicle-terrain interaction.","PeriodicalId":104429,"journal":{"name":"Hungarian Agricultural Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129838349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The main influencing factors of mobile banking adoption in the open innovation business environment (Case study) 开放式创新商业环境下手机银行采用的主要影响因素(案例分析)
Hungarian Agricultural Engineering Pub Date : 1900-01-01 DOI: 10.17676/hae.2021.40.28
Thabit Atobishi, Miriam Bahna, C. Fogarassy
{"title":"The main influencing factors of mobile banking adoption in the open innovation business environment (Case study)","authors":"Thabit Atobishi, Miriam Bahna, C. Fogarassy","doi":"10.17676/hae.2021.40.28","DOIUrl":"https://doi.org/10.17676/hae.2021.40.28","url":null,"abstract":"Mobile banking is a mobile commerce application that is revolutionizing financial services. Accepting and using a virtual system is not easy for users, either technologically or emotionally. The purpose of this research is to find out the effects of \"Effect of Risk Perception\", \"Perceived Ease of Use\" and \"Perceived Usefulness of Mobile Banking\" on mobile banking attitude and adoption. For this study, data was collected in 2019 from N=220 participants using 19 items of five Likert-type questionnaires. The data was analyzed using Statistical Package for Social Sciences and Regression Analysis through the enter method was used. It was found out that there is a positive significant effect of perceived ease of use and perceived usefulness of mobile banking on mobile banking attitude. The results also showed, that attitude towards switching to mobile banking has a positive significant effect on the intentions of mobile banking adoption. It can be concluded that the perceived ease of use of mobile banking will have a significant impact on attitudes towards switching to mobile banking services. The results of the research show that the perceived risk has a significant effect on the mobile. Also, for the ractitioners it is very important to take into consideration these results to promote the usage of mobile banking among the customers in Jordan. Our research results also show similarities and differences from previous research results, confirming the unique characteristics of the rapidly developing Arab region. User behavior related to mobile banking is shaped by the combined effect of custom and culture. Mobile banking services may be a very efficient and cost-effective tool in the future, accelerating industry development processes.","PeriodicalId":104429,"journal":{"name":"Hungarian Agricultural Engineering","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129293797","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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