Pub Date : 2023-01-01DOI: 10.18226/23185279.e231102
Samuel Ribeiro Brando, Ivandro Cecconello
A Industria 4.0 e as tecnologias relacionadas a Internet of Things (IoT) têm avançado dentro das organizações e em ambientes industriais diversificados, trazendo consigo inovações disruptivas e transformações na gestão industrial destes cenários. O setor de manutenção tem papel importante como habilitador e desenvolvedor de recursos, dispositivos e ferramentas digitais tanto para processos de manufatura quanto para os seus processos internos relacionados a disponibilidade, confiabilidade, capabilidade e manutenibilidade dos ativos geridos. A partir disso, o presente artigo é baseado em um estudo de caso de observação e experimentação, demonstrando os processos, a implementação e os resultados obtidos no desenvolvimento de ferramentas digitais, dispositivos de monitoramento em tempo real e supervisórios para o gerenciamento remoto dos ativos críticos (subestações elétricas e compressores) de uma empresa do segmento metalmecânico da serra gaúcha. Os resultados demonstraram as seguintes vantagens: menor tempo para tomada de decisão por parte da gestão, os custos de manutenção são reduzidos, o risco de paradas nas operações é minimizado, além da otimização da manutenibilidade e economia de energia.
{"title":"Sistemas Ciberfísicos desenvolvidos para apoio na manutenção centrada em confiabilidade: uma aplicação em subestações de energia e central de compressores","authors":"Samuel Ribeiro Brando, Ivandro Cecconello","doi":"10.18226/23185279.e231102","DOIUrl":"https://doi.org/10.18226/23185279.e231102","url":null,"abstract":"A Industria 4.0 e as tecnologias relacionadas a Internet of Things (IoT) têm avançado dentro das organizações e em ambientes industriais diversificados, trazendo consigo inovações disruptivas e transformações na gestão industrial destes cenários. O setor de manutenção tem papel importante como habilitador e desenvolvedor de recursos, dispositivos e ferramentas digitais tanto para processos de manufatura quanto para os seus processos internos relacionados a disponibilidade, confiabilidade, capabilidade e manutenibilidade dos ativos geridos. A partir disso, o presente artigo é baseado em um estudo de caso de observação e experimentação, demonstrando os processos, a implementação e os resultados obtidos no desenvolvimento de ferramentas digitais, dispositivos de monitoramento em tempo real e supervisórios para o gerenciamento remoto dos ativos críticos (subestações elétricas e compressores) de uma empresa do segmento metalmecânico da serra gaúcha. Os resultados demonstraram as seguintes vantagens: menor tempo para tomada de decisão por parte da gestão, os custos de manutenção são reduzidos, o risco de paradas nas operações é minimizado, além da otimização da manutenibilidade e economia de energia.","PeriodicalId":21696,"journal":{"name":"Scientia cum Industria","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78637485","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}
Pub Date : 2023-01-01DOI: 10.18226/23185279.e231101
J. Zorzi, C. Perottoni
The reproducibility of some solid-state phase transition temperatures, as deter- mined by differential scanning calorimetry, is assessed by a literature search and also by analysis of results obtained in the limit of zero heating rate for KNO3, CsCl, and anhydrous Li2SO4, using different instruments. The study is complemented by an overview of previously published results for the phase transition temperatures of several inorganic materials commonly used for temperature calibration of thermal analysis instruments. Reproducibility among the onset temperature of solid-state phase transitions of inorganic salts, as determined by differential scanning calorimetry, can be conservatively estimated to be within ±1 oC under favorable circumstances and around ±2 oC in general.
{"title":"Reproducibility of some solid-state phase transition temperatures as obtained from DTA/DSC","authors":"J. Zorzi, C. Perottoni","doi":"10.18226/23185279.e231101","DOIUrl":"https://doi.org/10.18226/23185279.e231101","url":null,"abstract":"The reproducibility of some solid-state phase transition temperatures, as deter- mined by differential scanning calorimetry, is assessed by a literature search and also by analysis of results obtained in the limit of zero heating rate for KNO3, CsCl, and anhydrous Li2SO4, using different instruments. The study is complemented by an overview of previously published results for the phase transition temperatures of several inorganic materials commonly used for temperature calibration of thermal analysis instruments. Reproducibility among the onset temperature of solid-state phase transitions of inorganic salts, as determined by differential scanning calorimetry, can be conservatively estimated to be within ±1 oC under favorable circumstances and around ±2 oC in general.","PeriodicalId":21696,"journal":{"name":"Scientia cum Industria","volume":"141 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74393863","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}
Pub Date : 2023-01-01DOI: 10.18226/23185279.e231105
Laís Gilioli Tosin, Wendel Paulo Silvestre, C. Baldasso
Hybrid polymeric membranes with the addition of graphene and derivatives are currently being developed and studied due to the unique properties of this material, whose addition in membranes is related to the enhancement of physical and mechanical properties and separation performance. In this study, polysulfone (PSU) membranes containing graphene oxide (PSU/GO) and reduced graphene oxide (PSU/RGO) were developed at a concentration of 0.5 wt.%, and their morphology, physical-chemical and thermal properties, and separation performance were evaluated. Membrane morphology was evaluated by SEM, thermal stability by TGA/DTG, functional groups and material structure by FTIR, mechanical properties by pressure test, and gas permeation using synthetic air. Agglomeration of GO and RGO was verified, a factor that may have interfered with the performance of the membranes. There was no change in the thermal stability of the membranes with the presence of GO/RGO, nor the occurrence of new bands observed in FTIR spectra, indicating that the interactions between PSU and GO/RGO were physical. All membranes resisted the maximum system pressure (6 bar), and it was not possible to identify whether the addition of graphene-derived materials had a positive effect on the mechanical strength. PSU/GO membranes had a better performance regarding synthetic air permeability in the gas permeation test than PSU and PSU/RGO membranes, possibly due to the functional groups present in GO, which facilitated the mass transfer within the polymer structure.
{"title":"Graphene oxide and reduced graphene oxide as additives in polysulfone hybrid membranes for gas permeation","authors":"Laís Gilioli Tosin, Wendel Paulo Silvestre, C. Baldasso","doi":"10.18226/23185279.e231105","DOIUrl":"https://doi.org/10.18226/23185279.e231105","url":null,"abstract":"Hybrid polymeric membranes with the addition of graphene and derivatives are currently being developed and studied due to the unique properties of this material, whose addition in membranes is related to the enhancement of physical and mechanical properties and separation performance. In this study, polysulfone (PSU) membranes containing graphene oxide (PSU/GO) and reduced graphene oxide (PSU/RGO) were developed at a concentration of 0.5 wt.%, and their morphology, physical-chemical and thermal properties, and separation performance were evaluated. Membrane morphology was evaluated by SEM, thermal stability by TGA/DTG, functional groups and material structure by FTIR, mechanical properties by pressure test, and gas permeation using synthetic air. Agglomeration of GO and RGO was verified, a factor that may have interfered with the performance of the membranes. There was no change in the thermal stability of the membranes with the presence of GO/RGO, nor the occurrence of new bands observed in FTIR spectra, indicating that the interactions between PSU and GO/RGO were physical. All membranes resisted the maximum system pressure (6 bar), and it was not possible to identify whether the addition of graphene-derived materials had a positive effect on the mechanical strength. PSU/GO membranes had a better performance regarding synthetic air permeability in the gas permeation test than PSU and PSU/RGO membranes, possibly due to the functional groups present in GO, which facilitated the mass transfer within the polymer structure.","PeriodicalId":21696,"journal":{"name":"Scientia cum Industria","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75891985","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}
Pub Date : 2023-01-01DOI: 10.18226/23185279.e231104
Débora Carolina Vanni, Wendel Paulo Silvestre, C. Baldasso
Water contamination by micropollutants is increasing, including steroid hormones. Indiscriminate use, incorrect disposal, inefficient treatment of water and effluents, and less restrictive legislation promote the contamination of effluents and water, with harmful consequences for the environment and human health. In this work, it was evaluated the use of reverse osmosis in the removal of ethinylestradiol and levonorgestrel, synthetic steroids that are components of contraceptives. The hydraulic permeability of the membrane was assessed before, during, and after reverse osmosis of an aqueous solution of contraceptive, as well as the retention of hormones, of a synthetic solution of contraceptive used as the feed. 95.6% retention of the compounds was observed, demonstrating the efficiency of reverse osmosis in the removal of solutes. In addition, there was no important reduction of the hydraulic permeability of the membrane when compared to the clean membrane and after reverse osmosis, demonstrating that the cleaning step was efficient in removing fouling or other interferents formed during the process. Reverse osmosis was efficient in the removal of constituents of contraceptives from aqueous solutions, being an option in the treatment of water and effluents aiming to attain better potability and smaller toxicity risks for the environment and human health.
{"title":"Study of the efficiency of the removal of steroid hormones from water by reverse osmosis","authors":"Débora Carolina Vanni, Wendel Paulo Silvestre, C. Baldasso","doi":"10.18226/23185279.e231104","DOIUrl":"https://doi.org/10.18226/23185279.e231104","url":null,"abstract":"Water contamination by micropollutants is increasing, including steroid hormones. Indiscriminate use, incorrect disposal, inefficient treatment of water and effluents, and less restrictive legislation promote the contamination of effluents and water, with harmful consequences for the environment and human health. In this work, it was evaluated the use of reverse osmosis in the removal of ethinylestradiol and levonorgestrel, synthetic steroids that are components of contraceptives. The hydraulic permeability of the membrane was assessed before, during, and after reverse osmosis of an aqueous solution of contraceptive, as well as the retention of hormones, of a synthetic solution of contraceptive used as the feed. 95.6% retention of the compounds was observed, demonstrating the efficiency of reverse osmosis in the removal of solutes. In addition, there was no important reduction of the hydraulic permeability of the membrane when compared to the clean membrane and after reverse osmosis, demonstrating that the cleaning step was efficient in removing fouling or other interferents formed during the process. Reverse osmosis was efficient in the removal of constituents of contraceptives from aqueous solutions, being an option in the treatment of water and effluents aiming to attain better potability and smaller toxicity risks for the environment and human health.","PeriodicalId":21696,"journal":{"name":"Scientia cum Industria","volume":"56 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77628784","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}
Pub Date : 2023-01-01DOI: 10.18226/23185279.e231106
Larissa Coêlho de Azevêdo, Anderson de Jesus Lima, Débora de Gois Santos, Denise Conceição de Gois Santos Michelan
A água consumida pelo ser humano necessita passar por tratamento, para apresentar qualidade. A fim de identificar possibilidades de tratamento simplificado, o estudo verificou o uso do quiabo como coagulante/floculante no tratamento de água para consumo humano, por meio de revisão sistemática, pautada na varredura de artigos científicos disponíveis em bases internacionais: Scopus, Web of Science e ScienceDirect. Fundamentou-se na criação de protocolo de pesquisa, levantamento e identificação dos artigos, seleção destes a partir dos critérios de inclusão e exclusão e, por fim, extração dos dados, para assim analisar integralmente artigos para compor o portfólio bibliográfico. Das 1532 publicações regatadas, 13 artigos foram lidos. Houve registro de estudos a partir de 1996, com destaque para 2015 e 2016. Ressalva-se que alguns trabalhos utilizam o quiabo apenas como coagulante, outros como floculante ou mesmo nessa dupla função. Além disso, o quiabo foi estudado tanto individualmente como associado a coagulantes químicos ou orgânicos, nas mais diversificadas dosagens. No tocante à eficiência, observou-se melhorias dos parâmetros estudados (58 a 98 %), o que retrata resultados promissores. Com isso, percebe-se que o uso do quiabo no tratamento de água, além de acessível utilização, por apresentar facilidade na aquisição, é também sustentável por ser um coagulante/floculante natural.
{"title":"Aplicação do fruto Abelmoschus esculentus no tratamento de água: uma revisão sistemática","authors":"Larissa Coêlho de Azevêdo, Anderson de Jesus Lima, Débora de Gois Santos, Denise Conceição de Gois Santos Michelan","doi":"10.18226/23185279.e231106","DOIUrl":"https://doi.org/10.18226/23185279.e231106","url":null,"abstract":"A água consumida pelo ser humano necessita passar por tratamento, para apresentar qualidade. A fim de identificar possibilidades de tratamento simplificado, o estudo verificou o uso do quiabo como coagulante/floculante no tratamento de água para consumo humano, por meio de revisão sistemática, pautada na varredura de artigos científicos disponíveis em bases internacionais: Scopus, Web of Science e ScienceDirect. Fundamentou-se na criação de protocolo de pesquisa, levantamento e identificação dos artigos, seleção destes a partir dos critérios de inclusão e exclusão e, por fim, extração dos dados, para assim analisar integralmente artigos para compor o portfólio bibliográfico. Das 1532 publicações regatadas, 13 artigos foram lidos. Houve registro de estudos a partir de 1996, com destaque para 2015 e 2016. Ressalva-se que alguns trabalhos utilizam o quiabo apenas como coagulante, outros como floculante ou mesmo nessa dupla função. Além disso, o quiabo foi estudado tanto individualmente como associado a coagulantes químicos ou orgânicos, nas mais diversificadas dosagens. No tocante à eficiência, observou-se melhorias dos parâmetros estudados (58 a 98 %), o que retrata resultados promissores. Com isso, percebe-se que o uso do quiabo no tratamento de água, além de acessível utilização, por apresentar facilidade na aquisição, é também sustentável por ser um coagulante/floculante natural.","PeriodicalId":21696,"journal":{"name":"Scientia cum Industria","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135709402","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}
Pub Date : 2023-01-01DOI: 10.18226/23185279.e231103
Ş. Güngör, Emre Taş
Energy consumption based on the building heating, ventilation, and air-conditioning (HVAC) systems is sharply rising daily. At this point, heat recovery ventilation systems save energy while contributing to indoor air quality and thermal comfort. This work mainly focuses on designing the air-to-air cross-flow heat exchanger system and duct lines. First, the ducts, bends, vents, and heat recovery ventilation unit are placed around the selected domain complying with the ASHRAE 55 and 62.1 standards. The requirements on temperature levels of the cold and hot streams, air flow rates, number of vents, velocity at the supply air vent outlets are considered. Then, calculations are conducted for the cross-flow air-to-air heat exchanger to determine the number of layers, heat transfer surface areas, flow regime, and heat transfer rate. Thermal calculations of the recuperator system are initially performed by effectiveness-number of transfer unit (ϵ-NTU) method as the outlet temperatures are not known at the beginning of the design. In addition, the findings are compared and validated via logarithmic mean temperature difference methodology. The results show that the fresh air temperature can increase from 5 °C to 13.32 °C when the exhaust air temperature is at 26 °C in winter. Furthermore, the heat transfer rate of air-to-air heat exchanger system is analytically calculated as 1806.7 W and 1807.5 W via ϵ-NTU and logarithmic mean temperature difference (LMTD) methods, respectively.
{"title":"Design and analytical investigation on air-to-air cross flow heat exchanger of an industrial heat recovery ventilation system","authors":"Ş. Güngör, Emre Taş","doi":"10.18226/23185279.e231103","DOIUrl":"https://doi.org/10.18226/23185279.e231103","url":null,"abstract":"Energy consumption based on the building heating, ventilation, and air-conditioning (HVAC) systems is sharply rising daily. At this point, heat recovery ventilation systems save energy while contributing to indoor air quality and thermal comfort. This work mainly focuses on designing the air-to-air cross-flow heat exchanger system and duct lines. First, the ducts, bends, vents, and heat recovery ventilation unit are placed around the selected domain complying with the ASHRAE 55 and 62.1 standards. The requirements on temperature levels of the cold and hot streams, air flow rates, number of vents, velocity at the supply air vent outlets are considered. Then, calculations are conducted for the cross-flow air-to-air heat exchanger to determine the number of layers, heat transfer surface areas, flow regime, and heat transfer rate. Thermal calculations of the recuperator system are initially performed by effectiveness-number of transfer unit (ϵ-NTU) method as the outlet temperatures are not known at the beginning of the design. In addition, the findings are compared and validated via logarithmic mean temperature difference methodology. The results show that the fresh air temperature can increase from 5 °C to 13.32 °C when the exhaust air temperature is at 26 °C in winter. Furthermore, the heat transfer rate of air-to-air heat exchanger system is analytically calculated as 1806.7 W and 1807.5 W via ϵ-NTU and logarithmic mean temperature difference (LMTD) methods, respectively.","PeriodicalId":21696,"journal":{"name":"Scientia cum Industria","volume":"60 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80469740","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}
Pub Date : 2022-10-01DOI: 10.18226/23185279.v10iss1p19
Senair Antunes Marques
{"title":"Jogos educativos no ensino de números decimais","authors":"Senair Antunes Marques","doi":"10.18226/23185279.v10iss1p19","DOIUrl":"https://doi.org/10.18226/23185279.v10iss1p19","url":null,"abstract":"","PeriodicalId":21696,"journal":{"name":"Scientia cum Industria","volume":"136 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76451118","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}
{"title":"Show da Luna: mediando a alfabetização científica na Educação Infantil","authors":"Oraide Suzana Antunes Bittencourt, Guilherme Brambatti Guzzo","doi":"10.18226/23185279.v10iss1p53","DOIUrl":"https://doi.org/10.18226/23185279.v10iss1p53","url":null,"abstract":"","PeriodicalId":21696,"journal":{"name":"Scientia cum Industria","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81430787","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}
Pub Date : 2022-10-01DOI: 10.18226/23185279.v10iss1p70
Alana Della Giustina Salami, Tainá da Costa Nunes Santos, Elisa Boff
{"title":"Proposta pedagógica: introduzindo o pensamento computacional com App Inventor","authors":"Alana Della Giustina Salami, Tainá da Costa Nunes Santos, Elisa Boff","doi":"10.18226/23185279.v10iss1p70","DOIUrl":"https://doi.org/10.18226/23185279.v10iss1p70","url":null,"abstract":"","PeriodicalId":21696,"journal":{"name":"Scientia cum Industria","volume":"37 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89503448","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}
Pub Date : 2022-10-01DOI: 10.18226/23185279.v10iss1p83
D. Fracasso, Josiana de Góes Pedroso Terres, Júlia Giacomet Thomazoni, José Arthur Martins
{"title":"Uma proposta de ação interdisciplinar sobre densidade no Ensino Fundamental","authors":"D. Fracasso, Josiana de Góes Pedroso Terres, Júlia Giacomet Thomazoni, José Arthur Martins","doi":"10.18226/23185279.v10iss1p83","DOIUrl":"https://doi.org/10.18226/23185279.v10iss1p83","url":null,"abstract":"","PeriodicalId":21696,"journal":{"name":"Scientia cum Industria","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84584561","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}
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