Results 91 to 100 of about 14,157 (254)

Experimental Study on R454C Electric-Vehicle Heat-Pump System

Zhileng xuebao
To evaluate the low Global-Warming-Potential （GWP） zeotropic refrigerant R454C in multimode thermal management systems for electric vehicles， an integrated heat pump test bench was developed that combines direct expansion in cabin with a secondary ...
Zhang Genyun, Zhang Yunlong, Huang Haozhe, Li Yulu, Zhang Lubao, Shi Junye, Chen Jiangping, Yu Binbin   +7 more
doaj  

Ice gliding diatoms establish record-low temperature limit for motility in a eukaryotic cell

Proceedings of the National Academy of Sciences
Abstract Despite periods of permanent darkness and extensive ice coverage in polar environments, photosynthetic ice diatoms display a remarkable capability of living inside the ice matrix. How these organisms navigate such hostile conditions with limited light and extreme cold remains unknown.
Qing Zhang, Hope T. Leng, Hongquan Li, Kevin R. Arrigo, Manu Prakash   +4 more
openaire   +2 more sources

Habitat‐Specific Design Strategies for Untethered Soft Robots

Advanced Science, EarlyView.
Habitat shapes the design of untethered soft robots. Across land, water, air, and living tissues, environmental constraints govern viable combinations of compliant structures, actuation mechanisms, and energy delivery. This review connects these constraints with robotic performance and identifies design principles for advancing adaptable, durable, and ...
Siyang Li, Zhikun Miao, Tuck‐Whye Wong, Tiefeng Li   +3 more
wiley   +1 more source

Decoupling Stable Cyclic Deformation From Defect Accumulation in Metals

Advanced Science, EarlyView.
Introducing amorphous nanoparticles into a metal matrix enables a cyclic deformation regime where strain hardening and defect accumulation are decoupled. These nanoparticles act as dislocation sinks and undergo reversible shear transformations, sustaining microstructural stability over millions of cycles.
Chenjun Ye, Shaofan Ge, Tian Yang, Leyi Tang, Kang Wang, Y. Morris Wang, Jun Ding, Zan Li, Di Zhang, En (Evan) Ma   +9 more
wiley   +1 more source

Experimental Investigation of Heat Pump Water Heater Using CO₂ Zeotropic Mixture with Large Temperature Glide for Waste Heat Recovery

Zhileng xuebao
Heat pump technology can be used to upgrade and enhance the quality of low-grade waste heat in production and daily life. Zeotropic mixtures can achieve temperature matching during the heat exchange process of heat pump cycles, which realizes in-depth ...
Zhang Tao, Wu Jiafeng, Liu Jian, Zhang Xiaosong, Li Mingxia   +4 more
doaj  

From Materials to Systems: Challenges and Solutions for Fast‐Charge/Discharge Na‐Ion Batteries

Advanced Energy Materials, EarlyView.
This review systematically analyzes the key characteristics limiting the fast‐charge/discharge capability of Na‐ion batteries (SIBs) from a multi‐scale perspective encompassing electrode materials, the electrode‐electrolyte interface, and the system. Furthermore, it presents practical solution strategies for the fundamental issues arising at each scale,
Bonyoung Ku, Sangbin Park, Sunha Hwang, Sunghyun Lim, Won‐Sub Yoon, Jongsoon Kim   +5 more
wiley   +1 more source

Optimum high temperature strength of two-dimensional nanocomposites

APL Materials, 2013
High-temperature nanoindentation was used to reveal nano-layer size effects on the hardness of two-dimensional metallic nanocomposites. We report the existence of a critical layer thickness at which strength achieves optimal thermal stability ...
M. A. Monclús, S. J. Zheng, J. R. Mayeur, I. J. Beyerlein, N. A. Mara, T. Polcar, J. Llorca, J. M. Molina-Aldareguía   +7 more
doaj   +1 more source

Safety of Sodium‐Ion Batteries: Evaluation and Perspective from Component Materials to Cells, Modules, and Packs

Advanced Energy Materials, EarlyView.
This review provides a bottom‐up evaluation of sodium‐ion battery safety, linking material degradation mechanisms, cell engineering parameters, and module/pack assembly. It emphasizes that understanding intrinsic material stability and establishing coordinated engineering control across hierarchical levels are vital for preventing degradation coupling ...
Won‐Gwang Lim, Seoa Kim, Erik A. Wu, Darren H. S. Tan, Shawn Peng, Xiaolin Li   +5 more
wiley   +1 more source

Multi-objective optimization and TOPSIS-based comprehensive evaluation of low-GWP refrigerant mixtures for high-temperature heat pumps

Case Studies in Thermal Engineering
Selecting low global warming potential (GWP) refrigerant mixtures for high-temperature heat pumps requires balancing cycle efficiency, volumetric capacity, temperature matching, environmental impact, and cost.
Lei Zeng, Rong Feng, Ganglin Cao, Zhiguo Wang, Mingyang Xu, Zhiru Li, Ye Liu, Xiaoyi Xie, Yongzhi Cheng, Xiaolin Lyu, Hong Cui   +10 more
doaj   +1 more source

Study and modeling of the CO2 frosting on a gliding temperature evaporator

Étude et modélisation du givrage du CO2 sur un évaporateur à glissement de température Le captage et le stockage du dioxyde de carbone est la solution pour réduire les émissions de CO2 des grandes sources fixes. Le captage du CO2 par « Antisublimation » consiste à refroidir les fumées sous le point triple du CO2 qui passe alors ...
openaire   +2 more sources