Results 101 to 110 of about 280,655 (302)

Influence of Surface Finish on the Tribological Performance of AlTiBN Coatings Deposited on Forming Tools

Advanced Engineering Materials, EarlyView.
Aluminum and nitride coatings are used in industry because they are hard, resist wear, and protect against oxidation. Adding boron can improve friction behavior and other properties. This study tests coatings on surfaces with different finishes. Results show smoother surfaces perform better, while rough ones wear faster, although coatings can reduce ...
Adrián Claver, Iker Alfonso, Eneko Barba, Javier León, José Antonio García, Iñaki Zalakain, Iván Fernández Martínez, Arley García‐Carrero, Christian Almeyda, Daniel Salcedo   +9 more
wiley   +1 more source

Fixing Efficiency Values by Unfixing Compressor Speed: Dynamic Test Method for Heat Pumps

Energies, 2019
The growing market penetration of heat pumps indicates the need for a performance test method that better reflects the dynamic behavior of heat pumps.
Carsten Palkowski, Andreas Zottl, Ivan Malenkovic, Anne Simo   +3 more
doaj   +1 more source

MILP Model for Energy Supply Design to overcome the Cannibalization of Solar Thermal Plants and large-scale Heat Pumps in Urban District Heating Systems [PDF]

, 2020
Urban infrastructure is accountable for a large share of carbon emissions, especially energy supply to meet the demand for thermal heat and domestic water. Regarding the climate agreements these systems have to be decarbonized.
Thommessen, Christian, Scheipers, Jan, Roes, Jürgen, Heinzel, Angelika, Miglani, Somil, Bokor, Balász   +5 more
core  

Photoswitching Conduction in Framework Materials

Advanced Functional Materials, EarlyView.
This mini‐review summarizes recent advances in state‐of‐the‐art proton and electron conduction in framework materials that can be remotely and reversibly switched on and off by light. It discusses the various photoswitching conduction mechanisms and the strategies employed to enhance photoswitched conductivity.
Helmy Pacheco Hernandez, Stefan Hecht, Wolfgang Wenzel, Lars Heinke, Mariana Kozlowska   +4 more
wiley   +1 more source

3D‐Printed Sulfur‐Derived Polymers With Controlled Architectures for Lithium‐Sulfur Batteries

Advanced Functional Materials, EarlyView.
Rheology‐guided formulation design for direct ink writing enables the fabrication of 3D sulfur copolymer cathodes with controlled architectures for lithium‐sulfur batteries. The printed electrodes exhibit multiscale porosity and high sulfur utilization, delivering enhanced electrochemical performance compared to conventional cast electrodes.
Bin Ling, Haoran Wang, Pan Yang, Rishav Agrawal, Alex R. Neale, Laurence J. Hardwick, Tom Hasell, Esther García‐Tuñón   +7 more
wiley   +1 more source

Evaluation of the Energy Efficiency of the Stage Compression Heat Pump Cycle

Известия высших учебных заведений и энергетических объединенний СНГ: Энергетика, 2019
The increase in production and modernization of existing heat pumps are global trends in the development and implementation of heat pump technology. Application of refrigerant with zero potential ozone depletion relative to fluorinetrichloromethane and ...
S. K. Abildinova, R. A. Musabekov, A. S. Rasmukhametova, S. V. Chicherin   +3 more
doaj   +1 more source

Heat pumps testing methodology [PDF]

, 2012
Tato bakalářská práce se zabývá metodikou zkoušení tepelných čerpadel. První část práce zahrnuje základní principy funkce tepelného čerpadla z termomechanického hlediska, popis základních prvků tepelného čerpadla a zdroje nízkopotenciálního tepla.
Španihelová, Kateřina
core  

Hot‐Film and Calorimetric Methods With Transient Heating for Measurement of High Biofluid Flow Rate

Advanced Functional Materials, EarlyView.
Accurate measurement of biofluid flow rate is vital for clinical diagnostics. We propose a transient heating strategy using short thermal pulses and peak temperature tracking to enhance the flow sensitivity of the hot‐Film and calorimetric methods. Simulations show how optimal heating time maximizes sensitivity across flow rates.
Yuanting Wei, Shupeng Li, Kyung Rok Pyun, Tianyu Yang, Bosung Kim, Haotian Yang, John A. Rogers, Yonggang Huang, Haohui Zhang   +8 more
wiley   +1 more source

‘Greening’ the UK: A Comparative Study of Heat Pumps and Hydrogen Boilers in Residential Heating

Energies
With a key policy decision on the role of hydrogen boilers expected by 2026, the UK is at a strategic crossroads in implementing its Heat and Buildings Strategy.
Lin Gao, Philip Naylor, Abdelrahman Hegab, Pericles Pilidis   +3 more
doaj   +1 more source

Ground source heat pumps [PDF]

, 2012
Tato bakalářská práce popisuje a charakterizuje tepelná čerpadla země-voda. Obsahuje také souhrn ostatních druhů tepelných čerpadel z hlediska principu, získávání energie a ekologičnosti.
Nykl, František
core