Pub Date : 2022-06-20DOI: 10.32933/actainnovations.43.4
W. Mahmood, Hayder A. Abdulbari, Asaad H. Laft
In the present work, the effect of three insoluble additives densities on reducing the drag of crude oil was investigated. The objective of the present work is to evaluate the effect of the insoluble additive’s densities on their drag reduction efficiency in hydrocarbon flow medium. Three powders with different densities are chosen, namely carbon powder, glass powder, and copper powder, with a density of 1710 kg/m3, 2550 kg/m3, and 8950 kg/m3, respectively. The turbulence flow environment was created in a custom-made rotating disc apparatus with a maximum rotation speed of 300 rpm. To evaluate the effect of the powder density, the particle's size was chosen to be 100 µm. All the solutions were tested at the exact operating conditions with a rotation speed ranging between 200 to 2200 rpm. The experimental results showed a clear effect of the powder density on the drag reduction performance. The glass powders showed the highest drag reduction effect, while the copper and carbon powders were lower. The effect of the degree of turbulence on the drag reduction performance of the powders was clear, where the interaction between the powders and the turbulence structures (eddies) governed the turbulence-suppression efficiency of the additives.
{"title":"Investigating the effect of insoluble additives type on the drag reduction performance in a crude oil turbulent flow system","authors":"W. Mahmood, Hayder A. Abdulbari, Asaad H. Laft","doi":"10.32933/actainnovations.43.4","DOIUrl":"https://doi.org/10.32933/actainnovations.43.4","url":null,"abstract":"In the present work, the effect of three insoluble additives densities on reducing the drag of crude oil was investigated. The objective of the present work is to evaluate the effect of the insoluble additive’s densities on their drag reduction efficiency in hydrocarbon flow medium. Three powders with different densities are chosen, namely carbon powder, glass powder, and copper powder, with a density of 1710 kg/m3, 2550 kg/m3, and 8950 kg/m3, respectively. The turbulence flow environment was created in a custom-made rotating disc apparatus with a maximum rotation speed of 300 rpm. To evaluate the effect of the powder density, the particle's size was chosen to be 100 µm. All the solutions were tested at the exact operating conditions with a rotation speed ranging between 200 to 2200 rpm. The experimental results showed a clear effect of the powder density on the drag reduction performance. The glass powders showed the highest drag reduction effect, while the copper and carbon powders were lower. The effect of the degree of turbulence on the drag reduction performance of the powders was clear, where the interaction between the powders and the turbulence structures (eddies) governed the turbulence-suppression efficiency of the additives.","PeriodicalId":32240,"journal":{"name":"Acta Innovations","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46538646","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}
This research examined at the optimum cutting parameters for producing minimum surface roughness and maximum Material Removal Rate (MRR) when turning magnesium alloy AZ91D. Cutting speed (m/min), feed (mm/rev), and cut depth (mm) have all been considered in the experimental study. To find the best cutting parameters, Taguchi's technique and Response Surface Methodology (RSM), an evolutionary optimization techniques Genetic Algorithm (GA) and Non-dominated Sorting Genetic Algorithm-II (NSGA-II) were employed. GA gives better results of 34.04% lesser surface roughness and 15.2% higher MRR values when compared with Taguchi method. The most optimal values of surface roughness and MRR is received in multi objective optimization NSGA-II were 0.7341 µm and 9460 mm3 /min for the cutting parameters cutting speed at 140.73m/min, feed rate at 0.06mm/min and 0.99mm depth of cut. Multi objective NSGA-II optimization provides several non-dominated points on Pareto Front model that can be utilized as decision making for choice among objectives
{"title":"Optimization of process parameters in turning of magnesium AZ91D alloy for better surface finish using genetic algorithm","authors":"Pradeep Kumar Madhesan, Venkatesan Rajamanickam, Manimurugan Manickam","doi":"10.32933/actainnovations.43.5","DOIUrl":"https://doi.org/10.32933/actainnovations.43.5","url":null,"abstract":"This research examined at the optimum cutting parameters for producing minimum surface roughness and maximum Material Removal Rate (MRR) when turning magnesium alloy AZ91D. Cutting speed (m/min), feed (mm/rev), and cut depth (mm) have all been considered in the experimental study. To find the best cutting\u0000parameters, Taguchi's technique and Response Surface Methodology (RSM), an evolutionary optimization techniques Genetic Algorithm (GA) and Non-dominated Sorting Genetic Algorithm-II (NSGA-II) were employed.\u0000GA gives better results of 34.04% lesser surface roughness and 15.2% higher MRR values when compared with Taguchi method. The most optimal values of surface roughness and MRR is received in multi objective optimization NSGA-II were 0.7341 µm and 9460 mm3 /min for the cutting parameters cutting speed at 140.73m/min, feed rate at 0.06mm/min and 0.99mm depth of cut. Multi objective NSGA-II optimization provides several non-dominated points on Pareto Front model that can be utilized as decision making for choice\u0000among objectives","PeriodicalId":32240,"journal":{"name":"Acta Innovations","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44903554","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 : 2022-06-20DOI: 10.32933/actainnovations.43.6
I. Bashynska, G. Smokvina, L. Yaremko, Yuliya Lemko, T. Ovcharenko, Suhang Zhang
The article examines the existing methods of assessing the innovation and investment image of the region and proposes an author's methodology that considers the development of the region's production and infrastructure to form a strategic policy to create and apply innovation and economic potential of the region. The research hypothesis is based on the use of the method of distance from the standard, allowing to obtain relatively objective and fair assessments of the innovation and investment image of the region, considering the leading indicators of enterprises, ensuring their differentiation by industry. Enterprises, industries, and regions in the top rankings are considered more attractive to investors in terms of innovation, economic and social development. To confirm the hypothesis, the method of assessing the innovation and investment image of the regions was considered, which begins with an empirical, theoretical study and ends with the practicality of use. A method for determining the rating of business activity of innovation-active and investment-attractive enterprises considering their territorial and sectoral affiliation has been developed. The study has a significant economic and regional impact: using this method of assessing the innovation and investment image of the regions allows investors to evaluate and select the region in which the investment proposal will consider the features and priorities of economic development of the region and industry trends.
{"title":"Assessment of investment and innovation image of the regions of Ukraine in terms of sustainable transformations","authors":"I. Bashynska, G. Smokvina, L. Yaremko, Yuliya Lemko, T. Ovcharenko, Suhang Zhang","doi":"10.32933/actainnovations.43.6","DOIUrl":"https://doi.org/10.32933/actainnovations.43.6","url":null,"abstract":"The article examines the existing methods of assessing the innovation and investment image of the region and proposes an author's methodology that considers the development of the region's production and infrastructure to form a strategic policy to create and apply innovation and economic potential of the region.\u0000The research hypothesis is based on the use of the method of distance from the standard, allowing to obtain relatively objective and fair assessments of the innovation and investment image of the region, considering the leading indicators of enterprises, ensuring their differentiation by industry. Enterprises, industries, and regions in the top rankings are considered more attractive to investors in terms of innovation, economic\u0000and social development. To confirm the hypothesis, the method of assessing the innovation and investment image of the regions was considered, which begins with an empirical, theoretical study and ends with the practicality of use. A method for determining the rating of business activity of innovation-active and investment-attractive enterprises considering their territorial and sectoral affiliation has been developed.\u0000The study has a significant economic and regional impact: using this method of assessing the innovation and investment image of the regions allows investors to evaluate and select the region in which the investment proposal will consider the features and priorities of economic development of the region and industry trends.","PeriodicalId":32240,"journal":{"name":"Acta Innovations","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43649276","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 : 2022-06-20DOI: 10.32933/actainnovations.43.1
Xiaoqin Qu, Bo Li, Wei Yang, Y. Nazarenko
The main objective of the study was to evaluate the effect of added 0.3% (w/w) oat β-glucan (OG) in set-type yogurt on its protein digestion using an in vitro gastrointestinal model. During gastric digestion phase, the amount of soluble proteins and peptides increased to 25% and 40% for control yogurt (yogurt without OG) and 0.3% OG yogurt, respectively. Buccal digestion has little effect on the structure of yogurts, while large spherical vesicles were formed for both control yogurt and 0.3% OG yogurt after gastric digestion. The presence of 0.3% OG promoted the hydrolysis of yogurt in the gastric digestion phase and caused higher antioxidant activity. Compared with that of control yogurt, the inhibition of cholesterol solubility of 0.3% OG yogurt showed no differences after buccal digestion but significantly higher after gastrointestinal digestion (21.3% for gastric and 22.7% for intestinal digestion). Overall, this study enhances the understanding of digestion characteristics of 0.3% OG-fortified set-type yogurt and provides a theoretical basis for the development of this kind of dairy products.
{"title":"Effect of oat β-glucan on in vitro digestion characteristics of set- type yogurt","authors":"Xiaoqin Qu, Bo Li, Wei Yang, Y. Nazarenko","doi":"10.32933/actainnovations.43.1","DOIUrl":"https://doi.org/10.32933/actainnovations.43.1","url":null,"abstract":"The main objective of the study was to evaluate the effect of added 0.3% (w/w) oat β-glucan (OG) in set-type yogurt on its protein digestion using an in vitro gastrointestinal model. During gastric digestion phase, the amount of soluble proteins and peptides increased to 25% and 40% for control yogurt (yogurt without OG) and 0.3% OG yogurt, respectively. Buccal digestion has little effect on the structure of yogurts, while large spherical vesicles were formed for both control yogurt and 0.3% OG yogurt after gastric digestion. The presence of 0.3% OG promoted the hydrolysis of yogurt in the gastric digestion phase and caused higher antioxidant activity. Compared with that of control yogurt, the inhibition of cholesterol solubility of 0.3% OG yogurt showed no\u0000differences after buccal digestion but significantly higher after gastrointestinal digestion (21.3% for gastric and 22.7% for intestinal digestion). Overall, this study enhances the understanding of digestion characteristics of 0.3% OG-fortified set-type yogurt and provides a theoretical basis for the development of this kind of dairy products.","PeriodicalId":32240,"journal":{"name":"Acta Innovations","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48214453","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 : 2022-06-20DOI: 10.32933/actainnovations.43.2
Mengistu Negussie, T. Woldeamanuel, T. Tefera
Dera is one of the potential districts in teff production. Nonetheless, there are some restraints and prospects in teff commercialization still unaccustomed. This study initiates to examine the teff market chain in the Dera district. It concentrates to synthesize the behavior, transparency, and effectiveness of teff market expending data from different sources. It involved teff producers, wholesalers, retailers, rural assemblers, cooperatives, urban assemblers and processors. The data investigation engaged expressive inferential statics & SCP model. Concerning marketing, the result indicates that producers supplied to the market via rural retailers, wholesalers and directly to consumers 57.7% of teff produced in 2017 cropping season. There are eleven marketing channels in transferring 2268 Quintals of teff from farmers to different intermediaries until reaching end buyers. The market structure of teff is weakly oligopolistic, implying that the market is not competitive. The producers' share of margin for the teff market accounts 68.96% associated with a 31.04% total gross margin. The marketing channel with more teff supplied can have a high or low marketing margin depending on the presence of value-adding market agents in the track. It implies that the channel with more teff supplied is not necessarily the channel in which the highest market margin. The marketing agents in the study area incur primary transaction costs like packing, loading and unloading, storage, transportation, communication and other personal costs. Therefore, improved bargaining power, access to accurate market information and infrastructural development are essential for a better performing teff market.
{"title":"Analysis of tef market chain: evidence from South Gondar Zone, Ethiopia","authors":"Mengistu Negussie, T. Woldeamanuel, T. Tefera","doi":"10.32933/actainnovations.43.2","DOIUrl":"https://doi.org/10.32933/actainnovations.43.2","url":null,"abstract":"Dera is one of the potential districts in teff production. Nonetheless, there are some restraints and prospects in teff commercialization still unaccustomed. This study initiates to examine the teff market chain in the Dera district.\u0000It concentrates to synthesize the behavior, transparency, and effectiveness of teff market expending data from different sources. It involved teff producers, wholesalers, retailers, rural assemblers, cooperatives, urban assemblers and processors. The data investigation engaged expressive inferential statics & SCP model. Concerning marketing, the result indicates that producers supplied to the market via rural retailers, wholesalers and directly to consumers 57.7% of teff produced in 2017 cropping season. There are eleven marketing channels in transferring 2268 Quintals of teff from farmers to different intermediaries until reaching end buyers. The market structure of teff is weakly\u0000oligopolistic, implying that the market is not competitive. The producers' share of margin for the teff market accounts 68.96% associated with a 31.04% total gross margin. The marketing channel with more teff supplied can have a high or low marketing margin depending on the presence of value-adding market agents in the track. It implies\u0000that the channel with more teff supplied is not necessarily the channel in which the highest market margin. The marketing agents in the study area incur primary transaction costs like packing, loading and unloading, storage, transportation, communication and other personal costs. Therefore, improved bargaining power, access to accurate market information and infrastructural development are essential for a better performing teff market.","PeriodicalId":32240,"journal":{"name":"Acta Innovations","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49228823","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}
Background: One of the most important fields of biomedical engineering study nowadays is targeted drug delivery to specific cells. A drug's therapeutic efficacy can be improved and optimised by tightly targeting it to a pathophysiologically essential tissue architecture. The goal of this research is to develop saccharide conjugates for the targeted delivery of Atenolol, a -blocker. Methods: Galactose (monosaccharide), pectin (polysaccharide), and chitosan were chosen as the saccharides (polysaccharide). By grafting Atenolol with the modified saccharides, the conjugates were created. Spectroscopic and thermal studies were used to describe the chemically changed saccharides conjugates. H9c2 cell lines were used to conduct drug release research and cellular uptake studies. To investigate cytotoxicity, a brine shrimp lethality test was done. Results: The outcomes exhibit that Atenolol-modified saccharide conjugates can productively convey the medication to the target. Conclusion: It can be inferred that the improvement of saccharide-drug conjugates can be a compelling methodology for targeting cardiovascular medication.
{"title":"Engineered atenolol-glycoconjugates to target H9c2 cardiomyocyte cell lines","authors":"Smita Tukaram Kumbha, Manish Sudesh Bhatia, Shitalkumar Shivgonda Patil","doi":"10.32933/actainnovations.43.3","DOIUrl":"https://doi.org/10.32933/actainnovations.43.3","url":null,"abstract":"Background: One of the most important fields of biomedical engineering study nowadays is targeted drug delivery to specific cells. A drug's therapeutic efficacy can be improved and optimised by tightly targeting it to a pathophysiologically essential tissue architecture. The goal of this research is to develop saccharide conjugates for the targeted delivery of Atenolol, a -blocker. \u0000Methods: Galactose (monosaccharide), pectin (polysaccharide), and chitosan were chosen as the saccharides (polysaccharide). By grafting Atenolol with the modified saccharides, the conjugates were created. Spectroscopic and thermal studies were used to describe the chemically changed saccharides conjugates. H9c2 cell lines were used to conduct drug release research and cellular uptake studies. To investigate cytotoxicity, a brine shrimp lethality test was done. \u0000Results: The outcomes exhibit that Atenolol-modified saccharide conjugates can productively convey the medication to the target. \u0000Conclusion: It can be inferred that the improvement of saccharide-drug conjugates can be a compelling methodology for targeting cardiovascular medication.","PeriodicalId":32240,"journal":{"name":"Acta Innovations","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47487701","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 : 2022-05-26DOI: 10.32933/actainnovations.44.4
Supriya Lamba Sahdev, G. Singh, Mamta Chawla, C. S. Sharma
This study throws light on the outline of innovation taking place in Indian Food Processing SMEs with a special focus on open Innovation taking place in these SMEs and the exchange of information or knowledge taking place between inside-out and outside-in parties for the purpose of innovation. In addition, puts special focus on describing how SMEs’ product innovation output related with the effect of outside-in and inside-out exchange of knowledge and information. Further, it analyzes how expenditure on innovation and collaborating with outside parties can help in the predicting product innovation output of Indian Food Processing SMEs. The analysis was done with the help of Jamovi to find out regression between the dependent variable- “Product innovation output” & independent variables- “Extent of openness”, “Inhouse R& D expenditure”, “Purchase of R&D from outside sources”, “Acquiring knowledge from outside sources” and control variable- “Indian Food Processing SMEs”. And towards the end, it contains the summary of the survey done, which suggested that Indian Food Processing SMEs are proactively involved themselves in inside R&D in comparison to the outside R&D and buying or taking license from outside sources. Other than these activities, one more pointer came as a takeaway from the study, product innovation is performed more in comparison to process innovation by the Indian Food Processing SMEs.
{"title":"A study on impact of Open Innovation Openness on the Practices adopted by Indian Food Processing SMEs on Product Innovation Output","authors":"Supriya Lamba Sahdev, G. Singh, Mamta Chawla, C. S. Sharma","doi":"10.32933/actainnovations.44.4","DOIUrl":"https://doi.org/10.32933/actainnovations.44.4","url":null,"abstract":"This study throws light on the outline of innovation taking place in Indian Food Processing SMEs with a special focus on open Innovation taking place in these SMEs and the exchange of information or knowledge taking place between inside-out and outside-in parties for the purpose of innovation. In addition, puts special focus on describing how SMEs’ product innovation output related with the effect of outside-in and inside-out exchange of knowledge and information. Further, it analyzes how expenditure on innovation and collaborating with outside parties can help in the predicting product innovation output of Indian Food Processing SMEs. The analysis was done with the help of Jamovi to find out regression between the dependent variable- “Product innovation output” & independent variables- “Extent of openness”, “Inhouse R& D expenditure”, “Purchase of R&D from outside sources”, “Acquiring knowledge from outside sources” and control variable- “Indian Food Processing SMEs”. And towards the end, it contains the summary of the survey done, which suggested that Indian Food Processing SMEs are proactively involved themselves in inside R&D in comparison to the outside R&D and buying or taking license from outside sources. Other than these activities, one more pointer came as a takeaway from the study, product innovation is performed more in comparison to process innovation by the Indian Food Processing SMEs.","PeriodicalId":32240,"journal":{"name":"Acta Innovations","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44532638","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 : 2022-05-22DOI: 10.32933/actainnovations.44.2
R. Bahuguna, S. Chamoli, Y. Barthwal, Sumit Rana, Ashutosh Gupta, Vijay Singh Bisht
Due to the minimal transfer of heat from absorber plate to moving air in the duct, solar air heaters have low performance. One of the procedures to augment the heat transfer by substantial amount is by utilizing artificial roughness, by which the performance can be improved considerably. In this study, an economic investigation of solar air heater embedded with artificial roughness is accomplished numerically employing v-shaped roughness, with the objective of optimising life cycle solar savings. The non-dimensional parameters of roughness, namely, angle of attack (α), roughness pitch (p/e) and roughness height (e/Dh) are examined by varying temperature rise over the solar air heater (∆T) and solar radiations (I) for different economic parameters values i.e., cost of collector, cost of roughness elements, and cost of conventional fuel.
{"title":"Economic analysis of artificially roughened solar air heater with v-shaped ribs","authors":"R. Bahuguna, S. Chamoli, Y. Barthwal, Sumit Rana, Ashutosh Gupta, Vijay Singh Bisht","doi":"10.32933/actainnovations.44.2","DOIUrl":"https://doi.org/10.32933/actainnovations.44.2","url":null,"abstract":"Due to the minimal transfer of heat from absorber plate to moving air in the duct, solar air heaters have low performance. One of the procedures to augment the heat transfer by substantial amount is by utilizing artificial roughness, by which the performance can be improved considerably. In this study, an economic investigation of solar air heater embedded with artificial roughness is accomplished numerically employing v-shaped roughness, with the objective of optimising life cycle solar savings. The non-dimensional parameters of roughness, namely, angle of attack (α), roughness pitch (p/e) and roughness height (e/Dh) are examined by varying temperature rise over the solar air heater (∆T) and solar radiations (I) for different economic parameters values i.e., cost of collector, cost of roughness elements, and cost of conventional fuel.","PeriodicalId":32240,"journal":{"name":"Acta Innovations","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45353148","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 : 2022-05-04DOI: 10.32933/actainnovations.44.3
K. Rawat, P. Bhandari, V. S. Bisht
The trend of utilization of low-grade thermal energy gain huge attention due to increase in energy demand and depletion of conventional resources of energy. Low grade energy can be used in ORC-VCR cycle for refrigeration purpose. In the present work, to improve the performance a modified ORC-VCR cycle, recuperator and reheater are integrated in the cycle. The thermodynamic analysis of the modified system has been conducted with R600a, R600, R290 and R1270 as working fluids under various operating conditions viz. evaporator temperature, condenser temperature, boiler exit temperature. Different parameters evaluated to assess the performance are overall COP, mass flow rate per kW cooling capacity, expansion ratio and compression ratio. From the analysis, butane is found as a best choice for the modified ORC–VCR cycle. It was found that for the modified ORC-VCR cycle at boiler exit temperature of 90°C and condenser temperature 40°C has system COP of 0.5542 with butane, which is 7.1% and 18% higher than that of ORC-VCR cycle with recuperator and simple ORC-VCR cycle, respectively.
{"title":"Thermodynamic analysis of combined ORC-VCR system with recuperator and reheater","authors":"K. Rawat, P. Bhandari, V. S. Bisht","doi":"10.32933/actainnovations.44.3","DOIUrl":"https://doi.org/10.32933/actainnovations.44.3","url":null,"abstract":"The trend of utilization of low-grade thermal energy gain huge attention due to increase in energy demand and depletion of conventional resources of energy. Low grade energy can be used in ORC-VCR cycle for refrigeration purpose. In the present work, to improve the performance a modified ORC-VCR cycle, recuperator and reheater are integrated in the cycle. The thermodynamic analysis of the modified system has been conducted with R600a, R600, R290 and R1270 as working fluids under various operating conditions viz. evaporator temperature, condenser temperature, boiler exit temperature. Different parameters evaluated to assess the performance are overall COP, mass flow rate per kW cooling capacity, expansion ratio and compression ratio. From the analysis, butane is found as a best choice for the modified ORC–VCR cycle. It was found that for the modified ORC-VCR cycle at boiler exit temperature of 90°C and condenser temperature 40°C has system COP of 0.5542 with butane, which is 7.1% and 18% higher than that of ORC-VCR cycle with recuperator and simple ORC-VCR cycle, respectively.","PeriodicalId":32240,"journal":{"name":"Acta Innovations","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41705906","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 : 2022-04-05DOI: 10.32933/actainnovations.44.1
I. Burmaka, Mykyta Vorokhobin, I. Vorokhobin, I. Zhuravska
Navigation traffic and the danger of collision are steadily increasing. Features of navigation in narrow corridors (water, air, etc.) require the development of modern methods for assessing the situation of convergence and the choice of maneuvering divergence of vessels. A method is proposed for forming the area of inadmissible values of the parameters of the movement of any vehicles (including marine) with remote control of the process of their divergence. Situations are considered when a collision of sea vessels can be avoided only by changing the speed in case such vessels cannot change course. The proposed method can be generalized to any environment of navigation.
{"title":"Forming the area of unacceptable values of the parameters of vessels’ movement for the vessels’ divergence at remote control process","authors":"I. Burmaka, Mykyta Vorokhobin, I. Vorokhobin, I. Zhuravska","doi":"10.32933/actainnovations.44.1","DOIUrl":"https://doi.org/10.32933/actainnovations.44.1","url":null,"abstract":"Navigation traffic and the danger of collision are steadily increasing. Features of navigation in narrow corridors (water, air, etc.) require the development of modern methods for assessing the situation of convergence and the choice of maneuvering divergence of vessels. A method is proposed for forming the area of inadmissible values of the parameters of the movement of any vehicles (including marine) with remote control of the process of their divergence. Situations are considered when a collision of sea vessels can be avoided only by changing the speed in case such vessels cannot change course. The proposed method can be generalized to any environment of navigation.","PeriodicalId":32240,"journal":{"name":"Acta Innovations","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47508377","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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