Miniature Pump for Treatment of Refractory Ascites Based on Local Magnetic Actuation

2019 ◽  
Vol 13 (3) ◽  
Author(s):  
Nicolo Garbin ◽  
Patrick Doyle ◽  
Byron Smith ◽  
Jesse G. Taylor ◽  
Mubashir H. Khan ◽  
...  
Keyword(s):  
Low Cost ◽  
Magnetic Coupling ◽  
Daily Basis ◽  
Refractory Ascites ◽  
Alignment Algorithm ◽  
Magnetic Actuation ◽  
Magnetic Field Sensors ◽  
Positive Displacement ◽  
Displacement Pump ◽  
Transjugular Portosystemic Shunt

This paper presents the design, fabrication, and experimental validation of a novel low-cost implantable pump for the treatment of refractory ascites (RA) based on local magnetic actuation (LMA). A reciprocating positive displacement pump displaces liquid unidirectionally through magnetic coupling with a magnetic controller placed on the outside of the patient's body. The proposed solution is intuitive to use given an alignment algorithm that exploits externally placed magnetic field sensors (MFS). The implantable device has a catheter-like shape, is electronic free (no on-board battery), has low fabrication cost (<8 USD), and is able to generate a flow-rate of 3.65 L/h while effectively pumping fluids with various viscosity (1–5.5 cP). RA is commonly treated via costly paracentesis or invasive surgical placement of a transjugular portosystemic shunt (TIPS). The proposed solution can be implanted with minimally invasive techniques and can be used on a daily basis to drain a set amount of liquid, without requiring recurrent hospital visits.

scholarly journals A Low-Cost, Accurate, and High-Precision Fluid Dispensing System for Microscale Application

2016 ◽  
Vol 22 (2) ◽  
pp. 144-152 ◽  
Author(s):  
Champak Das ◽  
Guochun Wang ◽  
Chien Nguyen
Keyword(s):  
Low Cost ◽  
Flow Characteristics ◽  
Positive Displacement ◽  
Real Time Measurement ◽  
Fluid Dispensing ◽  
Accuracy And Precision ◽  
Displacement Pump ◽  
The Individual ◽  
Similar Accuracy ◽  
The Cost

We present here the development of a low-cost, accurate, and precise fluid dispensing system. It can be used with peristaltic or any other pump to improve the flow characteristics. The dispensing system has a range of 1 to 100 µL with accuracy of ~99.5% and standard deviation at ~150 nL over the entire range. The system developed does not depend on the accuracy or precision of the driving pump; therefore, any positive displacement pump can be used to get similar accuracy and precision, which gives an opportunity to reduce the cost of the system. The dispensing system does not require periodic calibration and can also be miniaturized for microfluidic application. Although primarily designed for aqueous liquid, it can be extended for different nonconductive liquids as well with modifications. The unit is further used for near real-time measurement of lactate from microdialysate. The individual components can easily be made disposable or sterilized for use in biomedical applications.

scholarly journals Experimental Performance of Solar Receivers Designed to Use Oil as a Heat Transfer Fluid

2011 ◽  
Vol 2011 ◽  
pp. 1-13 ◽  
Author(s):  
J. S. P. Mlatho
Keyword(s):  
Heat Transfer ◽  
Low Cost ◽  
Thermal Studies ◽  
Experimental Tests ◽  
Heat Transfer Fluid ◽  
Flow Meter ◽  
Positive Displacement ◽  
Displacement Pump ◽  
Parabolic Dish ◽  
Parabolic Dish Concentrator

A parabolic dish concentrator (PDC) has been designed to be used for charging a thermal energy storage (TES) that is for indirect cooking purpose. Three different receivers have been designed, fabricated, and their performance tested experimentally. The three designs are Volumetric Flask (VF), Volumetric Box (VB), and Conical Tube (CT) receivers. The receivers have been fabricated to use oil as a heat transfer fluid. Of the three designs, the CT receiver has the highest efficiency for a given flow rate, thus making it the best receiver. A positive displacement pump was also designed and constructed for the experimental tests. The pump is used to drive the oil through the receivers and also to act as a flow meter. Thus a low-cost and high-temperature positive displacement pump and a flow meter have been designed and fabricated for use in solar thermal studies.

Analysis of Deep Sea Umbilical in Steep Wave Configuration

2016 ◽  
Author(s):  
Akash A. Nair ◽  
Gnanaraj A. Anbu ◽  
Panneer Selvam Rajamanickam ◽  
Gopakumar Kuttikrishnan ◽  
Ramadass Gidugu Ananda
Keyword(s):  
Deep Sea ◽  
Mining Machine ◽  
Optimum Number ◽  
Suitable Material ◽  
Static And Dynamic Analysis ◽  
Positive Displacement ◽  
Displacement Pump ◽  
Umbilical Cable ◽  
Steep Wave ◽  
Mother Ship

Deep sea mining is mineral retrieval process that takes place on the ocean floor wherein global industries are actively exploring and experimenting of different techniques in this relatively new concept of mining for extracting it economically from depths of 5000–5500 m below the ocean’s surface. National Institute of Ocean Technology (NIOT), India has been working on a mining concept for ∼6000 m water depth where a crawler based mining machine collects, crushes and pumps nodules to the mother ship using a positive displacement pump through a flexible riser (umbilical) system. The umbilical also serve as the weight supporting member for the miner and pump. In this paper, static and dynamic analysis of the umbilical system in steep wave configuration and the miner is carried out using ORCAFLEX for launching and touchdown conditions. Three different materials are considered and the best suitable material for umbilical is selected as the first step based on the tension. Then umbilical with Single Miner System is analyzed for the launching and touchdown conditions. Based on the analysis the optimum number and spacing of buoyancy tanks that will keep the stresses within the allowable limits in the umbilical cable are recommended.

Study on Electromagnetic Vibration Pump

2013 ◽  
Vol 774-776 ◽  
pp. 312-315
Author(s):  
Zhan Xiong Lu
Keyword(s):  
Research Field ◽  
Pump Design ◽  
Positive Displacement ◽  
Low Viscosity ◽  
Electromagnetic Vibration ◽  
Displacement Pump ◽  
Small Flow ◽  
Working Principle ◽  
Low Specific Speed ◽  
Specific Speed

Electromagnetic vibration pump is one type of first proposed new household positive displacement pump.It is mainly used to transport water and other low viscosity liquid. It has many advantages including small flow, high head, simple structure,good self-priming performance. Electromagnetic driving method was combined with displacement pump in vibration pump for the first time. Its specific speed can reach below 10,and this is a breakthrough in super-low specific speed pump design. The working principle of electromagnetic vibration pump and its performance were studied in the paper. each of these problems is further discussed and explained in order to point out the research field for the development of electromagnetic vibration pump later.

Meaningful and Physically Consistent Efficiency Definition for Positive Displacement Pumps - Continuation of the Critical Review of ISO 4391 and ISO 4409

2021 ◽  
Author(s):  
Christian Schänzle ◽  
Peter F. Pelz
Keyword(s):  
Critical Review ◽  
Volumetric Efficiency ◽  
Dead Volume ◽  
Specific Enthalpy ◽  
Positive Displacement ◽  
Displacement Pump ◽  
Fluid Properties ◽  
The Common ◽  
Isentropic Efficiency ◽  
The Ideal

Abstract ISO 4391:1984 gives the common efficiency definition for positive displacement machines. ISO 4409:2019 uses this efficiency definition to specify the procedure for efficiency measurements. If the machine conditions do not correspond with an incompressible flow due to operation at high pressure levels, the compressibility of the fluid and the dead volume of a pump must be taken into account. On this point, ISO 4391:1984 is physically inconsistent. Achten et. al. address this issue in their paper at FPMC 2019 presenting a critical review of ISO 4409:2007. They introduce new definitions of the overall efficiency as well as the mechanical-hydraulic efficiency. At the same time, they question the validity of the volumetric efficiency definition. Li and Barkei continue on this issue in their paper at FPMC 2020 and give a new efficiency definition based on the introduction of a new quantity Φ which describes the volume specific enthalpy of the conveyed fluid. The motivation of this paper is to contribute to the ongoing and fruitful discussion. Our approach starts with the most general efficiency definition, namely the isentropic efficiency. Subsequently, we make assumptions concerning the fluid properties with respect to the compressibility of the conveyed fluid. On the basis of the ideal cycle of a positive displacement pump and the p-v diagram, we derive physically consistent and more meaningful representations of the overall, the mechanical-hydraulic and the volumetric efficiency that address the inconsistency of ISO 4391:1984. Furthermore, we compare our findings with the existing results of Achten et. al. and Li and Barkei.

Space Elevator

2011 ◽  
pp. 312-331
Author(s):  
Paul E. Nelson
Keyword(s):  
High School ◽  
Cost Saving ◽  
Science Fiction ◽  
Low Cost ◽  
Outer Space ◽  
Daily Basis ◽  
Easy Access ◽  
The World ◽  
Survey Results ◽  
The Cost

Currently, transporting cargo into Outer Space is not only expensive, but a complicated and prolonged process. The Space Shuttles used today are inadequate, overused and obsolete. At this time, there are efforts all around the world to make Space more accessible. There have been many proposals to solve the Space transportation dilemma. One proposal is the creation of a Space Elevator. The Space Elevator would provide low-cost, easy access to Space by dramatically reducing the cost of sending cargo into Space. A $10-$100 per pound the Space Elevator would provide an astounding cost-saving compared to the tens of thousands of dollars per pound it costs today. This low-cost access to Space would make it possible to substantially increase the amount of cargo that could be sent into Space on a daily basis. The first part of this paper describes how the Space Elevator is expected to work, and the advantage of access to space via the SE versus using primarily rockets. A compendium of information from a variety of sources is included in order to explain how the Space Elevator would be designed, constructed, and how it could solve the problems of transporting cargo into Space easily, cheaply, and frequently. The Space Elevator is a relatively new topic in the area of realistic science concepts and was merely science fiction not too long ago. The Space Elevator (“SE”) concept has only been in the spotlight in the last five years due to the work of Dr. Bradley Edwards of Carbon Designs Inc. Acceptance of the SE will be a difficult task for many reasons. One of these is that most people do not know about the SE concept, and those who do, tend to have trouble believing it is possible to build. In order to determine the best way of integrating the SE concept into society, a survey was conducted at Darien High School. The survey included such topics as the naming of "The Space Elevator," and how best to get the younger generation interested in the idea. The second part of this paper describes how to utilize the survey results to further the SE concept.

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