MDPI - Publisher of Open Access Journals

16 pages, 4480 KB

Open AccessArticle

Temperature Characteristics of the Port Plate Pair in an Integrated Seawater, Desalination Power Recovery Motor Pump: A Multi-Field Coupling Study

by Wenlei Li, Zhicui Wang, Yu Yang, Lei Zhang, Peng Wu, Jingyi Zhao, Rui Guo and Wei Cai

Processes 2026, 14(7), 1044; https://doi.org/10.3390/pr14071044 - 25 Mar 2026

Viewed by 369

Abstract

In order to reduce the energy consumption of a reverse osmosis seawater desalination system, a study was conducted on the port plate pair that affects the efficiency of the integrated seawater desalination power recovery motor pump. Based on its structural characteristics, a reverse [...] Read more.

In order to reduce the energy consumption of a reverse osmosis seawater desalination system, a study was conducted on the port plate pair that affects the efficiency of the integrated seawater desalination power recovery motor pump. Based on its structural characteristics, a reverse thrust model of the port plate pair was established. A fluid–solid heat multi-field coupling simulation platform was built to study the temperature characteristics of the port plate pair under different conditions. A design method was proposed to use the local temperature characteristics of the port plate pair as the range of residual compression force coefficient values. When the residual compression force coefficient is determined to be 1.05, the compression force of the port plate pair is 33,019 N, the power loss is 307 W, and the temperature reaches 45.1 °C. The simulation accuracy is verified to be 97.31% through experiments. This solved the power loss and local high-temperature problems of the port plate pair and improved the efficiency of the integrated seawater desalination power recovery motor pump. Full article

(This article belongs to the Section Environmental and Green Processes)

► Show Figures

Figure 1

25 pages, 12363 KB

Open AccessArticle

Analysis of Elastohydrodynamic Lubrication (EHL) Characteristics of Port Plate Pair of a Piston Pump

by Zhaoqiang Wang, Bo Han and Lingtao Sun

Machines 2022, 10(12), 1109; https://doi.org/10.3390/machines10121109 - 22 Nov 2022

Cited by 9 | Viewed by 3879

Abstract

This article presents a steady-state elastohydrodynamic lubrication model for the contact and sliding interface of an axial piston pump’s port plate pair. The wedge-shaped oil film thickness, pressure, viscosity, and elastic deformation distribution of the port plate pair were investigated by using the [...] Read more.

This article presents a steady-state elastohydrodynamic lubrication model for the contact and sliding interface of an axial piston pump’s port plate pair. The wedge-shaped oil film thickness, pressure, viscosity, and elastic deformation distribution of the port plate pair were investigated by using the finite difference method. The elastohydrodynamic lubrication characteristics for different operating parameters and two materials of the port plate pair were analyzed for comparison. Existing conditions for the EHL were calculated, and variations in leakage and friction coefficients were investigated. The results show that the elastic deformation of the interface greatly influences the oil film’s overall performance, which is related to the material, inlet pressure, velocity, viscosity, and the minimum oil film thickness that determines the EHL. The deformation caused by oil film pressure greatly influences the model leakage and friction coefficient, especially when the deformation is equal to the oil film clearance. Full article

(This article belongs to the Special Issue Elastohydrodynamic Lubrication)

► Show Figures

Figure 1

12 pages, 6988 KB

Open AccessArticle

High-Throughput Synthesis of Liposome Using an Injection-Molded Plastic Micro-Fluidic Device

by Sang-Won Woo, Yun Kyong Jo, Yeong-Eun Yoo and Sun Kyoung Kim

Micromachines 2021, 12(2), 170; https://doi.org/10.3390/mi12020170 - 9 Feb 2021

Cited by 5 | Viewed by 3351

Abstract

For mass production of liposomes, we designed a plastic micro-channel device on the basis of 5 μm of micro-nozzle array forming T-junction with 100 μm depth of micro-channel. A micro-channel unit for synthesizing liposomes consisted of two micro-nozzle arrays for mixing two solutions [...] Read more.

For mass production of liposomes, we designed a plastic micro-channel device on the basis of 5 μm of micro-nozzle array forming T-junction with 100 μm depth of micro-channel. A micro-channel unit for synthesizing liposomes consisted of two micro-nozzle arrays for mixing two solutions as well as delivery and recovery channels for supplying solutions and collecting liposome suspension. The number of micro-nozzles was approximately 2400 for a micro-channel unit, and seven units were applied independently on a micro-channel plate. The plastic micro-channel plate was injection-molded for mass production using a micro-channel stamper previously fabricated by UV lithography and nickel electroforming process. A plastic cover plate with seven pairs of inlet and outlet ports was machined by mechanical milling and drilling and was assembled with a micro-channel plate using a holder to form a liposome synthesizing device. Flow and mixing of solutions in the micro-channels were tested using colored water to check the micro-fluidic characteristics of the device. Finally, a L-α-phosphatidylcholine (SOY PC) liposome was synthesized using EtOH solution of SOY PC (95%) and saline (0.85% NaOH solution) to find that the liposomes were around 230 and 260 nm in diameter, depending on the flow rate of the lipid solution. Full article

(This article belongs to the Special Issue Polymer Processing for Microsystems)

► Show Figures

Figure 1

12 pages, 529 KB

Open AccessArticle

Design of Spatial-Mode (De)Multiplexer for Few-Mode Fibers Based on a Cyclically Used Michelson-Like Interferometer

by Xesús Prieto-Blanco, Carlos Montero-Orille, Vicente Moreno de Las Cuevas, María C. Nistal, Dolores Mouriz and Jesús Liñares

Appl. Sci. 2020, 10(23), 8584; https://doi.org/10.3390/app10238584 - 30 Nov 2020

Cited by 3 | Viewed by 2736

Abstract

Few mode optical fibers are a promising way to continue increasing the data rate in optical communications. However, an efficient method to launch and extract separately each mode is essential. The design of a interferometric spatial mode (de)multiplexer for few mode optical fibers [...] Read more.

Few mode optical fibers are a promising way to continue increasing the data rate in optical communications. However, an efficient method to launch and extract separately each mode is essential. The design of a interferometric spatial mode (de)multiplexer for few mode optical fibers is presented. It is based on a single Michelson-like interferometer which consists of standard optical elements and has a reflective image inverter in one arm. Particular care has been taken in its design so that both polarizations behave the same. Moreover, this interferometer can process several pairs of modes simultaneously. The multiplexer also consists of: a phase plate, focusing optics at both ports of the interferometer and elliptical core fibers to recirculate some outputs. It can multiplex ten spatial and polarization modes and it presents low losses and no intrinsic crosstalk between modes. Additionally, it is polarization insensitive, achromatic, compact and inexpensive. The same system can work as a demultiplexer when used in reverse. In this case, both the losses and the crosstalk remain very low. Similar designs that perform other functions, like an add-drop mode multiplexing, are also suggested. Full article

(This article belongs to the Special Issue Fiber Optic Communication)

► Show Figures

Graphical abstract

16 pages, 8383 KB

Open AccessFeature PaperEditor’s ChoiceArticle

Random Access Addressing of MEMS Electrostatic Shutter Array for Multi-Object Astronomical Spectroscopy

by Xufeng Liu, Takuya Takahashi, Masahiro Konishi, Kentaro Motohara and Hiroshi Toshiyoshi

Micromachines 2020, 11(8), 782; https://doi.org/10.3390/mi11080782 - 17 Aug 2020

Cited by 5 | Viewed by 5136

Abstract

An extended version of cross-bar type addressing technique is developed for three-port electrostatic micro shutters arranged in an arrayed format. A microelectromechanical systems (MEMS) shutter blade suspended by a pair of torsion beams works as a movable electrode that is either attracted upwards [...] Read more.

An extended version of cross-bar type addressing technique is developed for three-port electrostatic micro shutters arranged in an arrayed format. A microelectromechanical systems (MEMS) shutter blade suspended by a pair of torsion beams works as a movable electrode that is either attracted upwards to the cover plate to close the aperture or retracted downwards into the through-hole to open it. Tri-state positioning of the shutter—i.e., open, rest, and close—is controlled by the hysteresis loop of the electrostatic pull-in and release behavior using the combination of the voltages applied to the shutter, the cover, and the substrate. Random access addressing of the shutters is demonstrated by a control system composed of MATLAB-coded Arduino electronics. The shutter array developed in this work is for a sub-cluster of a reconfigurable shutter array under development for a multi-object galactic astronomy. Full article

(This article belongs to the Special Issue Optical MEMS, Volume II)

► Show Figures

Figure 1

16 pages, 29853 KB

Open AccessArticle

Assessment of the Dynamics Flow Field of Port Plate Pair of an Axial Piston Pump

by Lingxiao Quan, Haihai Gao, Changhong Guo and Shichao Che

Processes 2020, 8(1), 86; https://doi.org/10.3390/pr8010086 - 8 Jan 2020

Cited by 8 | Viewed by 8497

Abstract

This paper aims at studying the dynamic fluid evolution process of port plate pair of an axial piston pump. First of all, The Renormalization Group

k - ε

model (RNG

k - ε

model) is implemented to simulate the dynamic flow distribution and [...] Read more.

This paper aims at studying the dynamic fluid evolution process of port plate pair of an axial piston pump. First of all, The Renormalization Group

k - ε

model (RNG

k - ε

model) is implemented to simulate the dynamic flow distribution and forecast the evolution of the internal vortex structure inside the valve plate chamber with different speeds of pistons and velocities of inlet fluid by using computational fluid dynamics software. Then, an equivalent amplification test model of a piston-valve plate is built up based on Reynolds similarity theory; the flow state of the piston-valve plate flow field is observed applied the particle image velocimetry (PIV) measuring technique. The resulting uniformity of numerical simulation and PIV measurement verifies that the RNG

k - ε

model can achieve high-precision prediction for the vortex structure inside the valve plate chamber. Through analysis of velocity contours and streamlines of the flow field, it can be found that vortices with different scales, strengths and positions will occur during the process of fluid distribution, and the scale and strength of the vortex inside the valve plate chamber will be reduced with the increase of the piston’s moving speed, so the energy loss is also reduced and the efficiency is improved. Full article

(This article belongs to the Special Issue Optimization of Heat and Mass Exchange)

► Show Figures

Figure 1

20 pages, 1283 KB

Open AccessArticle

A Protein Concentration Measurement System Using a Flexural Plate-Wave Frequency-Shift Readout Technique

by Chua-Chin Wang, Tzu-Chiao Sung, Chia-Hao Hsu, Yue-Da Tsai, Yun-Chi Chen, Ming-Chih Lee and I-Yu Huang

Sensors 2013, 13(1), 86-105; https://doi.org/10.3390/s130100086 - 21 Dec 2012

Cited by 3 | Viewed by 7364

Abstract

A protein concentration measurement system with two-port flexural plate-wave (FPW) biosensors using a frequency-shift readout technique is presented in this paper. The proposed frequency-shift readout method employs a peak detecting scheme to measure the amount of resonant frequency shift. The proposed system is [...] Read more.

A protein concentration measurement system with two-port flexural plate-wave (FPW) biosensors using a frequency-shift readout technique is presented in this paper. The proposed frequency-shift readout method employs a peak detecting scheme to measure the amount of resonant frequency shift. The proposed system is composed of a linear frequency generator, a pair of peak detectors, two registers, and a subtractor. The frequency sweep range of the linear frequency generator is limited to 2 MHz to 10 MHz according to the characteristics of the FPW biosensors. The proposed frequency-shift readout circuit is carried out on silicon using a standard 0.18 μm CMOS technology. The sensitivity of the peak detectors is measured to be 10 mV. The power consumption of the proposed protein concentration measurement system is 48 mW given a 0.1 MHz system clock. Full article

(This article belongs to the Section Biosensors)

► Show Figures

11 pages, 483 KB

Open AccessArticle

Multi-Input Multi-Output Integrated Ionic Polymer-Metal Composite for Energy Controls

by Gou Nishida, Motonobu Sugiura, Masaki Yamakita, Bernhard Maschke and Ryojun Ikeura

Micromachines 2012, 3(1), 126-136; https://doi.org/10.3390/mi3010126 - 29 Feb 2012

Cited by 7 | Viewed by 7744

Abstract

This paper presents an integrated sensor/actuator device with multi-input and multi-output designed on the basis of a standard control representation called a distributed port-Hamiltonian system. The device is made from soft material called an ionic polymer-metal composite (IPMC). The IPMC consists of a [...] Read more.

This paper presents an integrated sensor/actuator device with multi-input and multi-output designed on the basis of a standard control representation called a distributed port-Hamiltonian system. The device is made from soft material called an ionic polymer-metal composite (IPMC). The IPMC consists of a base film of a polyelectrolyte gel and a double layer of plated metal electrodes. The electrodes of the experimental IPMC are sectioned, and it is implemented as a control system with four pairs of inputs/outputs. We stabilize the system, and detect changes in dynamics by using the control representation. Full article

► Show Figures

Figure 1

Search Results (8)

Further Information

Guidelines

MDPI Initiatives

Follow MDPI

Saved Queries

Search Filter Reset All

Years

Feature Papers

Subjects

Journals

Article Types

Countries / Regions

Search Results (8)

Further Information

Guidelines

MDPI Initiatives

Follow MDPI