Results 61 to 70 of about 28,831 (309)

Digital Actuation Control of Soft Robotic Origami With Self‐Folding Liquid Crystal Elastomer Hinges

Advanced Functional Materials, EarlyView.
Self‐folding soft‐rigid hybrid robotic origami is enabled by liquid crystal elastomer actuators with embedded Joule heating and closed‐loop digital control. Digitally addressable hinges provide reversible and programmable transitions between distinct folded states while maintaining actuation performance at high cycle counts (over 1500).
David C. Bershadsky, Tuo Zhao, Glaucio H. Paulino, Emily C. Davidson   +3 more
wiley   +1 more source

State of the Art of Research and Applications of Low-carbon Refrigerants

Zhileng xuebao, 2016
Refrigerant is the blood of refrigeration systems. Since the synthetic refrigerants were developed, refrigeration technology has experienced a rapid development.
Chen Guangming, Gao Neng, Piao Chuncheng
doaj  

The implications of residential air conditioning refrigerant choice on future hydrofluorocarbon consumption in the United States

Journal of Integrative Environmental Sciences, 2020
As the primary alternative to ozone-depleting refrigerants, hydrofluorocarbons (HFCs) have increased in use and emissions in the United States. This increase, and a large portion of total U.S.
David S. Godwin, Rebecca Ferenchiak
doaj   +1 more source

Additive Manufacturing of NiTi Shape Memory Alloys for Elastocaloric Applications: A Review

Advanced Functional Materials, EarlyView.
Additive manufacturing enables complex NiTi architectures that overcome key limitations in elastocaloric refrigeration, including poor heat transfer and high mechanical work input. This review surveys recent advances in LPBF‐ and DED‐fabricated NiTi shape memory alloys for elastocaloric applications, highlighting process–structure–performance ...
Ignatius Andre Setiawan, Mohammad Mehrali, Jaka Tušek, Shiva Mohajerani, Xiebin Wang, Dermot Brabazon, Mohammad Elahinia, Mehrshad Mehrpouya   +7 more
wiley   +1 more source

Performance Assessment of R-454C, R-449A, and R-744 in Food Retail Refrigeration Systems

Energies
Reduced energy use and increased energy efficiency are essential for decarbonization and sustainable development. The food cold chain is a crucial infrastructure with high energy consumption and rising demand.
William Ferretto, Luca Molinaroli, Fabrizio Codella   +2 more
doaj   +1 more source

The Analysis of Next-Generation Refrigerants in Terms of Energy, Exergy, and LCCP Perspective

Düzce Üniversitesi Bilim ve Teknoloji Dergisi, 2023
In this study, commonly used hydrofluorocarbon (HFC)-based refrigerants R404A and R410A, as well as hydrofluoroolefin (HFO)-based environmentally friendly next-generation refrigerant R1234yf with a low global warming potential (GWP), were analyzed in ...
Mehmet Onur Karaagac, Mustafa Aktaş, Merve Özer, Alper Ergün   +3 more
doaj   +1 more source

Probabilistic Flow Regime Map Modeling of Two-Phase Flow [PDF]

, 2006
The purpose of this investigation is to develop models for two-phase heat transfer, void fraction, and pressure drop, three key design parameters, in single, smooth, horizontal tubes using a common probabilistic two-phase flow regime basis ...
Chato, J.C., Jassim, E.W., Newell, T.A.
core  

Aqueous Two‐Phase Bioinks for Discrete Packing and Compartmentalization of 3D Bioprinted Cells

Advanced Healthcare Materials, EarlyView.
Aqueous two‐phase systems (ATPS) enable the formation of biomimetic interfaces crucial for tissue engineering. However, clinical translation remains limited by the challenge of precisely controlling cellular compartmentalization. Here, we developed ATPS biomaterial inks for 3D bioprinting allowing tuneable droplet formation via NaCl modulation.
Martina Marcotulli, Arianna Iacomino, Federico Serpe, Lucia Iafrate, Marco Bastioli, Giorgia Montalbano, Michele D'Orazio, Biagio Palmisano, Silvia Franco, Arianna Mencattini, Roberta Angelini, Eugenio Martinelli, Alessandro Corsi, Mara Riminucci, Giancarlo Ruocco, Chiara Scognamiglio, Andrea Barbetta, Gianluca Cidonio   +17 more
wiley   +1 more source

1,2-Difluoroethylene (HFO-1132): synthesis and chemistry

Beilstein Journal of Organic Chemistry
This article provides a comprehensive overview of the synthesis and chemistry of 1,2-difluoroethylene (HFO-1132). The major routes for the preparation of the E- and Z-isomer of HFO-1132 are reviewed, along with the chemistry in radical, nucleophilic, and
Liubov V. Sokolenko, Taras M. Sokolenko, Yurii L. Yagupolskii   +2 more
doaj   +1 more source

An Investigation of Void Fraction in the Stratified/Annular Flow Regions in Smooth, Horizontal Tubes [PDF]

, 1999
Refrigerants R134a and R410A have been used for void fraction measurements in smooth horizontal tubes with diameters between 4mm and 7mm. Quality and mass flux were varied from 5% to 90% and 75 kglm2-s to 700 kglm2-s, respectively.
Chato, J.C., Graham, D.M., Kopke, H.R., Newell, T.A., Wilson, M.J., Yashar, D.A.   +5 more
core