Results 61 to 70 of about 157,695 (360)

Quantum Emitters in Hexagonal Boron Nitride: Principles, Engineering and Applications

open access: yesAdvanced Functional Materials, EarlyView.
Quantum emitters in hexagonal boron nitride have emerged as a promising candidate for quantum information science. This review examines the fundamentals of these quantum emitters, including their level structures, defect engineering, and their possible chemical structures.
Thi Ngoc Anh Mai   +8 more
wiley   +1 more source

Division of Outdoor Nominal Condition of Air Source Heat Pumps in China

open access: yesZhileng xuebao, 2019
Air source heat pump,as an important heating and air-conditioning equipment, is widely used in various types of buildings in China.The different climate and building load characteristics within different zones create a gap between the demand for ...
Shi Wenxing, Yang Zixu, Wang Baolong
doaj  

Simulation of the Use of Ground and Air Source Heat Pumps in Different Climatic Conditions on the Example of Selected Cities: Warsaw, Madrid, Riga, and Rome

open access: yesEnergies, 2021
Heat pumps, an example of one of the most environmentally friendly technologies, can play a key role in the future of sustainable energy. Due to the European Union’s ambitious goals to achieve climate neutrality by 2050, research is currently focused on ...
Agata Ołtarzewska, Dorota Anna Krawczyk
doaj   +1 more source

Can you take the heat? – Geothermal energy in mining [PDF]

open access: yes, 2014
In 2013, there are less than 20 documented examples of operational geothermal systems on mine sites worldwide. This is surprising, since on remote mine sites, where fuels may have to be shipped in over great distances, heating and cooling from low ...
Preene, M., Younger, P.L.
core   +1 more source

Enhancing CoFe Catalysts with V2CTX MXene‐Derived Materials for Anion Exchange Membrane Electrolyzers

open access: yesAdvanced Functional Materials, EarlyView.
MXene dervied CoFe composites show increased initial Oxygen Evolution Reaction (OER) activity compared to the pure CoFe and MXene in an Anion Exchange Membrane device. Vanadium vacancies in the MXene plays a role in increased OER activity and hinders Fe leaching in the AEM device over using the pure V2C MXene as a support material for the CoFe ...
Can Kaplan   +16 more
wiley   +1 more source

Heat-pump performance: voltage dip/sag, under-voltage and over-voltage

open access: yesThe Journal of Engineering, 2014
Reverse cycle air-source heat-pumps are an increasingly significant load in New Zealand and in many other countries. This has raised concern over the impact wide-spread use of heat-pumps may have on the grid. The characteristics of the loads connected to
William J.B. Heffernan   +2 more
doaj   +1 more source

Enhancing Direct Solar Water Splitting via ALD of Multifunctional TiO2/Pt Nanoparticle Coatings With Engineered Interfaces to GaAs/GaInP Tandem Cells

open access: yesAdvanced Functional Materials, EarlyView.
Multifunctional atomic layer deposited coatings and interface treatments enhance direct solar water splitting on GaAs/GaInP tandem cells. Optimized TiO2/Pt nanoparticle bilayers ensure durability and catalytic efficiency with minimal optical losses, while H2 plasma pretreatments maximize photovoltage and interfacial charge extraction.
Tim F. Rieth   +8 more
wiley   +1 more source

Performance analysis on parallel condensing air-source heat pump water heater system

open access: yesEnergy Reports, 2022
Based on the technology of heat pumps, a parallel condensing air-source heat pumps water heater systems providing domestic hot water is proposed to improve the energy efficiency of common ASHPWH system.
Shouchuan Wang   +6 more
doaj   +1 more source

Exergy Analysis of Transcritical CO2 Air-Source Heat Pump with Honeycomb Gas Cooler [PDF]

open access: gold, 2023
Yujia Zhang   +6 more
openalex   +1 more source

State of the art in gas driven heat pumps [PDF]

open access: yes, 2014
All of the products currently on the market or known to be under development are being developed by European companies. The market leader is Robur, with ammonia-water absorption heat pumps available in air, water and ground source versions with nominal ...
Critoph, Robert E.
core  

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