Performance Comparison of a Bulk Thermoelectric Cooler With a Hybrid Device Architecture

2015 ◽  
Author(s):  
Margaret Antonik ◽  
Scott M. Ferguson ◽  
Brendan T. O’Connor
Keyword(s):  
Low Cost ◽  
Electrical Current ◽  
Performance Outcomes ◽  
Performance Comparison ◽  
Polymer Materials ◽  
Plastic Substrate ◽  
Thermoelectric Device ◽  
Hybrid Architecture ◽  
Thermoelectric Coolers ◽  
Trade Offs

This paper compares the economic viability and performance outcomes of two different thermoelectric device architectures to determine the advantages and appropriate use of each configuration. Hybrid thermoelectric coolers employ thin-film thermoelectric materials sandwiched between a plastic substrate and formed into a corrugated structure. Roll-to-roll manufacturing and low-cost polymer materials offer a cost advantage to the hybrid architecture at the sacrifice of performance capabilities while conventional bulk devices offer increased performance at a higher cost. Performance characteristics and cost information are developed for both hybrid and conventional bulk single-stage thermoelectric modules. The design variables include device geometry, electrical current input, and thermoelectric material type. The trade-offs between cooling performance and cost will be explored and the thermoelectric system configuration analyzed for both hybrid and conventional bulk thermoelectric coolers.

Performance and Design Comparison of a Bulk Thermoelectric Cooler With a Hybrid Architecture

2016 ◽  
Vol 8 (2) ◽  
Author(s):  
Margaret Antonik ◽  
Brendan T. O'Connor ◽  
Scott Ferguson
Keyword(s):  
Low Cost ◽  
Electrical Current ◽  
Performance Outcomes ◽  
Polymer Materials ◽  
Plastic Substrate ◽  
Thermoelectric Device ◽  
Hybrid Architecture ◽  
Cost Information ◽  
Thermoelectric Coolers ◽  
Design Variables

This paper compares the economic viability and performance outcomes of two different thermoelectric device architectures to determine the advantages and appropriate use of each configuration. Hybrid thermoelectric coolers (TECs) employ thin-film thermoelectric materials sandwiched between a plastic substrate and form a corrugated structure. Roll-to-roll (R2R) manufacturing and low-cost polymer materials offer a cost advantage to the hybrid architecture at the sacrifice of performance capabilities while conventional bulk devices offer increased performance at a higher cost. Performance characteristics and cost information are developed for both hybrid and conventional bulk single-stage thermoelectric modules. The design variables include device geometry, electrical current input, and thermoelectric material type. The tradeoffs between cooling performance and cost will be explored, and the thermoelectric system configuration is analyzed for both hybrid and conventional bulk TECs.

Performance Comparison Between 4D Trellis Coded Modulation and PAM-4 for Low-Cost 400 Gbps WDM Optical Networks

2016 ◽  
Vol 34 (22) ◽  
pp. 5308-5316 ◽  
Author(s):  
Cristian Prodaniuc ◽  
Nebojsa Stojanovic ◽  
Fotini Karinou ◽  
Zhang Qiang ◽  
Roberto Llorente
Keyword(s):  
Optical Networks ◽  
Low Cost ◽  
Performance Comparison ◽  
Coded Modulation ◽  
Wdm Optical Networks ◽  
Trellis Coded Modulation ◽  
Trellis Coded

scholarly journals Hardware-in-the-loop simulation of wave energy converters based on dielectric elastomer generators

Meccanica ◽  
2021 ◽  
Vol 56 (5) ◽  
pp. 1223-1237
Author(s):  
Giacomo Moretti ◽  
Andrea Scialò ◽  
Giovanni Malara ◽  
Giovanni Gerardo Muscolo ◽  
Felice Arena ◽  
...  
Keyword(s):  
Wave Energy ◽  
Large Scale ◽  
Low Cost ◽  
Test Site ◽  
Dielectric Elastomer ◽  
Operating Conditions ◽  
Polymer Materials ◽  
Hardware In The Loop ◽  
Wave Energy Converters ◽  
Energy Converters

AbstractDielectric elastomer generators (DEGs) are soft electrostatic generators based on low-cost electroactive polymer materials. These devices have attracted the attention of the marine energy community as a promising solution to implement economically viable wave energy converters (WECs). This paper introduces a hardware-in-the-loop (HIL) simulation framework for a class of WECs that combines the concept of the oscillating water columns (OWCs) with the DEGs. The proposed HIL system replicates in a laboratory environment the realistic operating conditions of an OWC/DEG plant, while drastically reducing the experimental burden compared to wave tank or sea tests. The HIL simulator is driven by a closed-loop real-time hydrodynamic model that is based on a novel coupling criterion which allows rendering a realistic dynamic response for a diversity of scenarios, including large scale DEG plants, whose dimensions and topologies are largely different from those available in the HIL setup. A case study is also introduced, which simulates the application of DEGs on an OWC plant installed in a mild real sea laboratory test-site. Comparisons with available real sea-test data demonstrated the ability of the HIL setup to effectively replicate a realistic operating scenario. The insights gathered on the promising performance of the analysed OWC/DEG systems pave the way to pursue further sea trials in the future.

scholarly journals Adaptable Monitoring Package Development and Deployment: Lessons Learned for Integrated Instrumentation at Marine Energy Sites

2020 ◽  
Vol 8 (8) ◽  
pp. 553 ◽  
Author(s):  
Brian Polagye ◽  
James Joslin ◽  
Paul Murphy ◽  
Emma Cotter ◽  
Mitchell Scott ◽  
...  
Keyword(s):  
Operating Mode ◽  
Ecological Monitoring ◽  
Performance Outcomes ◽  
Lessons Learned ◽  
Marine Animal ◽  
Time Data ◽  
Trade Offs ◽  
Marine Energy ◽  
Waves And Currents ◽  
Real Time Data Processing

Integrated instrumentation packages are an attractive option for environmental and ecological monitoring at marine energy sites, as they can support a range of sensors in a form factor compact enough for the operational constraints posed by energetic waves and currents. Here we present details of the architecture and performance for one such system—the Adaptable Monitoring Package—which supports active acoustic, passive acoustic, and optical sensing to quantify the physical environment and animal presence at marine energy sites. we describe cabled and autonomous deployments and contrast the relatively limited system capabilities in an autonomous operating mode with more expansive capabilities, including real-time data processing, afforded by shore power or in situ power harvesting from waves. Across these deployments, we describe sensor performance, outcomes for biological target classification algorithms using data from multibeam sonars and optical cameras, and the effectiveness of measures to limit biofouling and corrosion. On the basis of these experiences, we discuss the demonstrated requirements for integrated instrumentation, possible operational concepts for monitoring the environmental and ecological effects of marine energy converters using such systems, and the engineering trade-offs inherent in their development. Overall, we find that integrated instrumentation can provide powerful capabilities for observing rare events, managing the volume of data collected, and mitigating potential bias to marine animal behavior. These capabilities may be as relevant to the broader oceanographic community as they are to the emerging marine energy sector.

scholarly journals Performance Comparison of Low Cost TiO2 and ZnO Solar Cells Sensitized with Coumarin C343

2020 ◽  
Vol 12 (6) ◽  
pp. 06004-1-06004-6
Author(s):  
N. Houri ◽  
◽  
A. Djelloul ◽  
M. Adnane ◽  
◽  
...  
Keyword(s):  
Solar Cells ◽  
Low Cost ◽  
Performance Comparison

Localized Laser Sintering of Metal Nanoparticle Inks Printed with Aerosol Jet® Technology for Flexible Electronics

2017 ◽  
Vol 14 (4) ◽  
pp. 132-139 ◽  
Author(s):  
Michael J. Renn ◽  
Matthew Schrandt ◽  
Jaxon Renn ◽  
James Q. Feng
Keyword(s):  
Metal Nanoparticles ◽  
Flexible Electronics ◽  
Low Cost ◽  
Damage Threshold ◽  
Laser Sintering ◽  
Heating Time ◽  
Metal Nanoparticle ◽  
Polymer Materials ◽  
Nanoparticle Inks ◽  
Short Heating Time

Direct-write methods, such as the Aerosol Jet® technology, have enabled fabrication of flexible multifunctional 3-D devices by printing electronic circuits on thermoplastic and thermoset polymer materials. Conductive traces printed by additive manufacturing typically start in the form of liquid metal nanoparticle inks. To produce functional circuits, the printed metal nanoparticle ink material must be postprocessed to form conductive metal by sintering at elevated temperature. Metal nanoparticles are widely used in conductive inks because they can be sintered at relatively low temperatures compared with the melting temperature of bulk metal. This is desirable for fabricating circuits on low-cost plastic substrates. To minimize thermal damage to the plastics, while effectively sintering the metal nanoparticle inks, we describe a laser sintering process that generates a localized heat-affected zone (HAZ) when scanning over a printed feature. For sintering metal nanoparticles that are reactive to oxygen, an inert or reducing gas shroud is applied around the laser spot to shield the HAZ from ambient oxygen. With the shroud gas-shielded laser, oxygen-sensitive nanoparticles, such as those made of copper and nickel, can be successfully sintered in open air. With very short heating time and small HAZ, the localized peak sintering temperature can be substantially higher than that of damage threshold for the underlying substrate, for effective metallization of nanoparticle inks. Here, we demonstrate capabilities for producing conductive tracks of silver, copper, and copper–nickel alloys on flexible films as well as fabricating functional thermocouples and strain gauge sensors, with printed metal nanoparticle inks sintered by shroud-gas-shielded laser.

Degradation of Colored Polystyrene Films

2018 ◽  
Vol 930 ◽  
pp. 254-257 ◽  
Author(s):  
Francisca Pereira de Araújo ◽  
Josy Anteveli Osajima ◽  
Mônica Regina Silva de Araujo ◽  
Edson Cavalcanti da Silva Filho ◽  
João Sammy Nery de Souza
Keyword(s):  
Crystal Violet ◽  
Carbonyl Compounds ◽  
Low Cost ◽  
Chemical Properties ◽  
Polymer Materials ◽  
Visible Radiation ◽  
No Formation ◽  
Crystal Violet Dye ◽  
Physical And Chemical ◽  
And Chemical Properties

Polystyrene is commercial polymer of extensive use in industrial scale due to great physical and chemical properties and low cost. Lifespan of polymer materials can be changed by incorporation of additions to polymeric matrix.The present study aimed to evaluate the influence of crystal violet dye in polystyrene matrices when irradiated by visible radiation. The samples were studied in the form of films, in which solution of crystal violet (5.0x10-4mol.L-1) was added to the PS solution (8% w / w). The films were irradiated with commercial lamp for 150 hours and analyzed with UV-Vis and FTIR. The results showed that the dye degraded at a rate of 16%, however the FTIR analysis revealed that polystyrene did not degrade under the conditions studied, since no formation of carbonyl compounds was observed.

A NOVEL APPROACH OSA DETECTION USING SINGLE-LEAD ECG SCALOGRAM BASED ON DEEP NEURAL NETWORK

2019 ◽  
Vol 19 (04) ◽  
pp. 1950026 ◽  
Author(s):  
SINAM AJITKUMAR SINGH ◽  
SWANIRBHAR MAJUMDER
Keyword(s):  
Neural Network ◽  
Sleep Apnea ◽  
Learning Algorithm ◽  
Low Cost ◽  
Performance Outcomes ◽  
Classification Systems ◽  
Analysis Model ◽  
Time Frequency ◽  
Novel Approach ◽  
Obstructive Sleep

Obstructive sleep apnea (OSA) is the most common and severe breathing dysfunction which frequently freezes the breathing for longer than 10[Formula: see text]s while sleeping. Polysomnography (PSG) is the conventional approach concerning the treatment of OSA detection. But, this approach is a costly and cumbersome process. To overcome the above complication, a satisfactory and novel technique for interpretation of sleep apnea using ECG were recording is under development. The methods for OSA analysis based on ECG were analyzed for numerous years. Early work concentrated on extracting features, which depend entirely on the experience of human specialists. A novel approach for the prediction of sleep apnea disorder based on the convolutional neural network (CNN) using a pre-trained (AlexNet) model is analyzed in this study. After filtering per-minute segment of the single-lead ECG recording accompanied by continuous wavelet transform (CWT), the 2D scalogram images are generated. Finally, CNN based on deep learning algorithm is adopted to enhance the classification performance. The efficiency of the proposed model is compared with the previous methods that used the same datasets. Proposed method based on CNN is able to achieve the accuracy of 86.22% with 90% sensitivity in per-minute segment OSA classification. Based on per-recording OSA diagnosis, our works correctly classify all the abnormal apneic recording with 100% accuracy. Our OSA analysis model using time-frequency scalogram generates excellent independent validation performance with different state-of-the-art OSA classification systems. Experimental results proved that the proposed method produces excellent performance outcomes with low cost and less complexity.

scholarly journals Performance Outcomes After Metacarpal Fractures in National Basketball Association Players

Hand ◽  
2016 ◽  
Vol 11 (4) ◽  
pp. 427-432 ◽  
Author(s):  
Michael S. Guss ◽  
John P. Begly ◽  
Austin J. Ramme ◽  
Richard M. Hinds ◽  
Raj J. Karia ◽  
...  
Keyword(s):  
Operative Management ◽  
Performance Outcomes ◽  
Performance Comparison ◽  
National Basketball Association ◽  
Press Releases ◽  
Metacarpal Fractures ◽  
Appropriate Treatment ◽  
Performance Statistics ◽  
And Performance ◽  
Return To Competition

Background: The aim was to determine whether players in the National Basketball Association (NBA) who sustain metacarpal fractures demonstrate decreased performance upon return to competition when compared with their performance before injury and that of their control-matched peers. Methods: Data for 32 NBA players with metacarpal fractures incurred over 11 seasons (2002-2003 to 2012-2013) were obtained from injury reports, press releases, and player profiles ( www.nba.com and www.basketballreference.com ). Player age, body mass index (BMI), position, shooting hand, number of years in the league, and treatment (surgical vs nonsurgical) were recorded. Individual season statistics for the 2 seasons immediately prior to injury and the 2 seasons after injury, including player efficiency rating (PER), were obtained. Thirty-two controls matched by player position, age, and performance statistics were identified. A performance comparison of the cohorts was performed. Results: Mean age at the time of injury was 27 years with an average player BMI of 24. Players had a mean 5.6 seasons of NBA experience prior to injury. There was no significant change in PER when preinjury and postinjury performances were compared. Neither injury to their shooting hand nor operative management of the fracture led to a decrease in performance during the 2 seasons after injury. When compared with matched controls, no significant decline in performance in PER the first season and second season after injury was found. Conclusion: NBA players sustaining metacarpal fractures can reasonably expect to return to their preinjury performance levels following appropriate treatment.

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