Results 91 to 100 of about 8,926,589 (248)

Dual source heat pump systems: operation and performance

, 2011
In dual source systems the heat pump main cold source is aided by another source. Two combinations have received a special attention and have been studied: air and solar collectors; ground and solar collectors.
LAZZARIN, RENATO
core   +1 more source

Quantum Saturation of the Electro‐Optic Effect

Advanced Materials, EarlyView.
At low temperatures, quantum fluctuations saturate the ferroelectric soft mode, suppressing thermal sensitivity in functional properties. By tuning the phase boundaries of ferroelectric materials to 0 K, large temperature insensitive electro‐optic effects are realized, establishing a pathway toward high‐efficiency optical modulation for quantum ...
Aiden Ross, Sankalpa Hazra, Albert Suceava, Dylan Sotir, Ian Reed Philippi, Darrell G. Schlom, Venkatraman Gopalan, Long‐Qing Chen   +7 more
wiley   +1 more source

Experimental Study on Household Air-source Heat Pump Water Heater with Flash Tank

Zhileng xuebao, 2022
The experimental system of household air-source heat pump water heater with flash tank was set up, and its operation perform- ance at different temperatures was studied in the environmental control room, and compared with the single-stage compression ...
Wang Jiazheng, Ma Guoyuan, Yu Guoxin, Zhu Wanpeng, Gou Qianqian, Xu Shuxue   +5 more
doaj  

Scalable Production of Disordered Nickel‐Iron‐Aluminum Oxides as Stable Anodes for Water Electrolysis: The Role of Aluminum

Advanced Materials Interfaces, EarlyView.
Solution precursor plasma spraying enables the scalable fabrication of porous and disordered nickel‐iron‐aluminum oxide coatings as precious‐metal‐free anodes. Aluminum inhibits crystal growth, optimizes local atomic sites, and enhances charge and ion transport to accelerate reaction kinetics, leading to excellent performance and operational stability.
Tugce Ustunel, Joakim Bäckström, Esdras J. Canto‐Aguilar, Mouna Rafei, Litty Thomas Manamel, Mahesh Ramakrishnan, Konstantin Klementiev, Nina Grunditz, Erik Zimmerman, Thomas Wågberg, Susanne Holmin, Eduardo Gracia‐Espino   +11 more
wiley   +1 more source

Oxygen‐Controlled Structural and Defect Engineering of Magnetron‐Sputtered ZnO Thin Films for Photosensing

Advanced Materials Interfaces, EarlyView.
Zinc oxide thin films are engineered by controlling oxygen flow and nominal partial pressure during growth to tune atomic‐scale defects and crystallographic texture that limit device performance. By balancing competing defects, the films achieve improved preferential c‐axis orientation and enhanced ultraviolet photoresponse.
Julfikar Ali Sarkar, Rupa Jeena, Mohammed Aslam   +2 more
wiley   +1 more source

Cycle Analysis of Heating and Refrigeration in New Air-source Heat Pump

Zhileng xuebao, 2005
An air source heat pump operating in cascade cycle way was presented. The new-type heat pump can operate not only in a single-stage cycle, but also in a cascade cycle. The operation performance of the heat pump was stimulated.
王林, 陈光明, 陈斌, 王勤
doaj   +2 more sources

Review of Frost-free and Defrost Methods for Air-source Heat Pump Systems

Zhileng xuebao, 2019
Air-source heat pumps have been widely used for room heating and air conditioning because of their stable performance and easy installation. The greatest performance limitation is the frosting and defrosting problem of the outdoor heat exchanger during ...
Shen Jiubing, Li Ziqiang, Xing Ziwen, Yu Yue, Ge Meicai   +4 more
doaj  

From the Discovery of the Giant Magnetocaloric Effect to the Development of High‐Power‐Density Systems

Advanced Materials Technologies, EarlyView.
The article overviews past and current efforts on caloric materials and systems, highlighting the contributions of Ames National Laboratory to the field. Solid‐state caloric heat pumping is an innovative method that can be implemented in a wide range of cooling and heating applications.
Agata Czernuszewicz, Yaroslav Mudryk, Jun Cui, Lucas Griffith, Duane D. Johnson, Julie Slaughter   +5 more
wiley   +1 more source

Programmable Variable‐Stiffness Multilayer Elastomer Composites With High‐Aspect‐Ratio Low‐Melting‐Point Alloy Inclusions

Advanced Materials Technologies, EarlyView.
High‐aspect‐ratio low‐melting‐point alloy inclusions are embedded within multilayer silicone laminates to create thermally programmable stiffness. Sequential activation of alloy‐rich layers produces four distinct mechanical states and reconfigures tendon‐driven actuator trajectories under the same load.
Palpolage Don Shehan Hiroshan Gunawardane, Gyan Edbert Zesiro, Hao Zhou, Gursel Alici, Mu Chiao   +4 more
wiley   +1 more source

Influences and Optimization on R32 Vapor Injection Parameters of Air-source Heat Pump System Enhanced with Vapor Injection

Zhileng xuebao, 2021
This study aimed to optimize the heat production performance of an enhanced vapor injection air source heat pump system with R32. Combined with the structure and actual operation characteristics of a scroll compressor system, a complete mathematical ...
Zhang Tong, Zhao Lei, Li Yan
doaj