Flow Properties of Bamboo Fiber Suspensions

2012 ◽  
Author(s):  
Takuya Kubo ◽  
Satoshi Ogata
Keyword(s):  
Energy Consumption ◽  
Natural Resources ◽  
Pipe Flow ◽  
Reducing Agent ◽  
Bamboo Fiber ◽  
Environmental Load ◽  
Fiber Suspensions ◽  
Flow Properties ◽  
Bamboo Fibers ◽  
Reduce Energy Consumption

Reducing pipe friction by adding a drag reducing agent has attracted interest as a means to reduce energy consumption. In addition to reducing drag, drag reducing agents should also have a low environmental load and conserve natural resources. However, no drag reducing agent currently satisfies both these conditions. The present study investigates the use of bamboo fibers as a drag reducing agent that satisfies both conditions. The drag reducing effect was evaluated by measuring the pressure drop in pipe flow. Bamboo fiber suspensions reduced drag by up to 20%. In addition, bamboo fibers could be easily removed from suspensions by a filter. These results demonstrate that bamboo fibers are a drag reducing agent that both save natural resources and have a low environmental load.

scholarly journals Flow characteristics of drag-reducing natural bamboo fiber suspensions with minimal environmental load

TAPPI Journal ◽  
2019 ◽  
Vol 18 (9) ◽  
pp. 559-566
Author(s):  
SATOSHI OGATA ◽  
TAKUYA KUBO
Keyword(s):  
Flow Characteristics ◽  
Average Diameter ◽  
Reducing Agents ◽  
Bamboo Fiber ◽  
Pipe Diameter ◽  
Mechanical Degradation ◽  
Environmental Load ◽  
Resource Saving ◽  
Application Range ◽  
Bamboo Fibers

The reduction of pipe friction loss by adding drag-reducing agents has attracted attention as an aid to energy conservation. Drag-reducing agents induce drag reduction (DR) effects and should have a minimal environmental load, with natural resource-saving potential. This study demonstrates bamboo fiber as a drag-reducing agent that saves natural resources and has a low environmental load. Using pressure drop measurements, we report DR with suspensions of bamboo fibers with the average diameter of 13.3 μm and aspect ratio of 98.7. The maximum DR obtained in this experiment is 43% at the concentration of 4000 ppm and pipe diameter of 30 mm; DR is affected by the Reynolds number, suspension concentration, and pipe diameter. In addition, the bamboo fibers can be easily removed from the suspensions by filtration. We found that low-environmental-load bamboo fiber has DR effects like those of other fibers; its effects are greater than those of conventional synthetic fibers and wood pulp. Furthermore, it is resistant to mechanical degradation, recoverable, and recyclable. Therefore, DR effects can be selectively obtained by adding the fibers only when DR is needed; the fibers can then be collected when DR is no longer necessary. This method might greatly expand the application range of DR agents. The results demonstrate the usefulness of bamboo fibers as DR additives.

scholarly journals Drag Reduction of a Pipe Flow Using Nata de Coco Suspensions

2014 ◽  
Vol 6 ◽  
pp. 651260 ◽  
Author(s):  
Satoshi Ogata ◽  
Gunawan ◽  
Jun Warashina ◽  
Yanuar
Keyword(s):  
Natural Resources ◽  
Drag Reduction ◽  
Pipe Flow ◽  
Reducing Agents ◽  
Friction Loss ◽  
Mechanical Degradation ◽  
Environmental Load ◽  
Fiber Structure ◽  
Naturally Occurring

The addition of drag-reducing agents to reduce pipe friction loss has attracted attention as a method to conserve energy. In addition to reducing drag, these agents are required to have a low environmental load and conserve natural resources. Therefore, naturally occurring biopolymer additives, which are considered to have a low environmental load, have recently received much attention. Here we focused on nata de coco, a type of biopolymer that exhibits low mechanical degradation, and found that it reduced drag by up to 25% at a concentration of 50 ppm. With respect to the drag reduction (DR) mechanism, we investigated the relation between DR phenomena and the fiber structure of nata de coco by visualization. As a result, we found that the DR effect appeared only when a network of nata de coco fibers was formed in the suspension. In addition, DR increased as the size of the network of nata de coco fibers increased.

scholarly journals Aplicación móvil para la optimización de procesos de consumo de energía en sector hotelero

2019 ◽  
pp. 7-12
Author(s):  
Julio Cesar Rojas-Nando ◽  
Nayely Reyes-Luna
Keyword(s):  
Energy Consumption ◽  
Natural Resources ◽  
Mobile Application ◽  
Technological Knowledge ◽  
Household Appliance ◽  
Excessive Consumption ◽  
Reduce Energy Consumption

Engineering is the set of technological knowledge that helps in innovation, invention, development and improvement of techniques and tools that meet the needs and solve problems of companies and society in general, creating projects that facilitate the solution to any problem raised, not It matters what nature it is, always visualizing the benefit attached to a sustainability in general. Nowadays the biggest problem we have is the excessive consumption of natural resources, we need to give sound solutions that little by little will minimize this situation. In this project, a mobile application called Applight was visualized, which will help to reduce energy consumption in hotels, through an indicator that will let us know if any household appliance or lamps and lights were activated, thus having the opportunity to turn off and deactivate all those components that were left on when leaving. In this way, it will help to reduce energy consumption, in a large amount thus contributing to the care of the environment and the expenditure of energy payments in hotel companies.

Naval Energy Management System

2020 ◽  
Vol 26 (3) ◽  
pp. 20-25
Author(s):  
Laurențiu Bogdan Asalomia ◽  
Gheorghe Samoilescu
Keyword(s):  
Energy Consumption ◽  
Power Systems ◽  
New Technologies ◽  
Integrated Navigation ◽  
Integrated Navigation System ◽  
Efficient Management ◽  
Reduce Energy Consumption ◽  
Energy Efficiency Design Index ◽  
Green Ship

AbstractThe paper analyses the role of control and monitoring of electro-energetic equipment in order to reduce operational costs, increase profits and reduce carbon emissions. The role of SCADA and EcoStruxure Power systems is presented and analysed taking into account the energy consumption and its savings. The paper presents practical and modern solutions to reduce energy consumption by up to 53%, mass by up to 47% and increase the life of the equipment by adjusting the electrical parameters. The Integrated Navigation System has allowed an automatic control and an efficient management. For ships, the implementation of an energy efficiency design index and new technologies was required for the GREEN SHIP project.

The Research of Measuring Approach and Energy Efficiency for Hadoop Periodic Jobs

2015 ◽  
Vol 8 (1) ◽  
pp. 206-210 ◽  
Author(s):  
Yu Junyang ◽  
Hu Zhigang ◽  
Han Yuanyuan
Keyword(s):  
Energy Efficiency ◽  
Cloud Computing ◽  
Energy Consumption ◽  
Energy Saving ◽  
Energy Estimate ◽  
Cloud Platform ◽  
Periodic Tasks ◽  
Current Consumption ◽  
Reduce Energy Consumption

Current consumption of cloud computing has attracted more and more attention of scholars. The research on Hadoop as a cloud platform and its energy consumption has also received considerable attention from scholars. This paper presents a method to measure the energy consumption of jobs that run on Hadoop, and this method is used to measure the effectiveness of the implementation of periodic tasks on the platform of Hadoop. Combining with the current mainstream of energy estimate formula to conduct further analysis, this paper has reached a conclusion as how to reduce energy consumption of Hadoop by adjusting the split size or using appropriate size of workers (servers). Finally, experiments show the effectiveness of these methods as being energy-saving strategies and verify the feasibility of the methods for the measurement of periodic tasks at the same time.

Performance Analysis of Energy Efficient Opportunistic Routing Protocols in Wireless Sensor Network

2019 ◽  
Vol 09 ◽  
Author(s):  
Premkumar Chithaluru ◽  
Rajeev Tiwari ◽  
Kamal Kumar
Keyword(s):  
Energy Consumption ◽  
Routing Protocols ◽  
Energy Efficient ◽  
Data Communication ◽  
Opportunistic Routing ◽  
Link Quality ◽  
Delivery Ratio ◽  
Performance Parameters ◽  
Wireless Medium ◽  
Reduce Energy Consumption

Background: Energy Efficient wireless routing has been an area of research particularly to mitigate challenges surrounding performance in category of Wireless Networks. Objectives: The Opportunistic Routing (OR) technique was explored in recent times and exhibits benefits over many existing protocols and can significantly reduce energy consumption during data communication with very limited compromise on performance. Methods : Using broadcasting nature of the wireless medium, OR practices to discourse two foremost issues of variable link quality and unpredictable node agility in constrained WSNs. OR has a potential to reduce delay in order to increase the consistency of data delivery in network. Results : Various OR based routing protocols have shown varying performances. In this paper, a detailed conceptual and experimental analysis is carried out on different protocols that uses OR technique for providing more clear and definitive view on performance parameters like Message Success Rate, Packet Delivery Ratio and Energy Consumption.

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