Results 91 to 100 of about 53,922 (261)

Thermodynamic Evaluation of Low-GWP A1 Refrigerants for Ultra-Low Temperature Refrigeration Applications

Energies
Slow market development has caused the lack of low-GWP A1 refrigerants for ultra-low temperature (ULT) refrigeration. Consequently, the high-GWP refrigerant R23 (GWP = 14,600) remains widely used within the ULT sector.
Pau Giménez-Prades, Cosmin-Mihai Udroiu, Joaquín Navarro-Esbrí, Adrián Mota-Babiloni   +3 more
doaj   +1 more source

Low Global Warming Potential (GWP) Alternative Refrigerants Evaluation Program (Low-GWP AREP)

, 2012
In response to environmental concerns raised by the use of high global warming potential (GWP) refrigerants, the Air-Conditioning, Heating, and Refrigeration Institute (AHRI) launched an industry-wide cooperative research program, AHRI Low-GWP Alternative Refrigerants Evaluation Program (Low-GWP AREP), to identify and evaluate promising alternative ...
Wang, Xudong, Amrane, Karim, Johnson, Phillip   +2 more
openaire   +1 more source

Carbon emission assessment of tunnel infrastructures: From construction to operation

Deep Underground Science and Engineering, EarlyView.
This study develops a lifecycle carbon accounting framework for tunnel infrastructures, covering design, construction, operation, maintenance, and dismantling. Applied to a subsea tunnel case, the framework reveals the carbon emission distribution among four typical tunnel types and highlights potential carbon offset methods for low‐carbon tunnel ...
Luyuan Long, Wout Broere, Xuehui Zhang, Tian Xia, Richard de Nijs   +4 more
wiley   +1 more source

Variations in Line Profiles of Atomic Transitions in RR Lyrae Stars

The Astronomical Journal
We have investigated the absorption shapes of atomic lines and H α in RR Lyrae stars. We used the database of high-resolution spectra gathered with the Las Campanas Observatory du Pont Telescope, analyzing a set of about 2700 short exposure spectra of 17
Christopher Sneden, George W. Preston
doaj   +1 more source

Dynamic Covariance Models for Multivariate Financial Time Series [PDF]

, 2013
The accurate prediction of time-changing covariances is an important problem in the modeling of multivariate financial data. However, some of the most popular models suffer from a) overfitting problems and multiple local optima, b) failure to capture ...
Ghahramani, Zoubin, Hernández-Lobato, José Miguel, Wu, Yue   +2 more
core  

Solar Fuels Via Methane Valorization: Thermochemical Pathways, Unified Metrics, and Techno‐Economic Perspectives

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
A first‐of‐its‐kind review benchmarks three solar methane valorization pathways with unified performance metrics for clean fuel production. Meeting global climate targets and sustainable energy demands requires carbon‐neutral fuels and innovative conversion pathways.
Muhammad Abdulmoez, Amjad Othman, Majid Linjawi, Amro Al‐Qutub   +3 more
wiley   +1 more source

Testing GWP* to quantify non-CO2 contributions in the carbon budget framework in overshoot scenarios

npj Climate and Atmospheric Science
The Global Warming Potential-star (GWP*) approach is a way to convert the emissions of short-lived climate forcers to CO2-equivalent emissions while maintaining consistency with temperature outcomes.
Matteo Mastropierro, Katsumasa Tanaka, Irina Melnikova, Philippe Ciais   +3 more
doaj   +1 more source

Global meta-analysis reveals different grazing management strategies change greenhouse gas emissions and global warming potential in grasslands

Geography and Sustainability
Grazing management significantly influences greenhouse gas (GHG) emissions and the global warming potential (GWP) in grasslands. Yet, a limited understanding of the impact of grazing and grazing exclusion on GHG emissions and GWP in grasslands hinders ...
Lingfan Wan, Guohua Liu, Xukun Su
doaj   +1 more source

Carbon‐Negative Upcycling of Sewage Sludge into Superiorly Stable Gel Via Liquid‐Phase Utilization Strategy for Water‐Remediation

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
This work developed a low‐temperature sludge hydrothermal coupled with gel crosslinking strategy which could upgrade the waste liquid generated from sewage sludge hydrothermal treatment into the hydrothermal‐liquid‐gel. The inventive hydrothermal‐liquid‐gel exhibited the enhanced pollutant removal capability, high synthetic stability, and superior ...
Zifan Liu, Sunxinyi Wang, Lingxiao Lu, Weiguo Zhang, Qiang Zheng, Cailiang Yue, Huimin Chang, Xiaohui Lu, Ming Xu, Zhi Qian, Qing Zhou, Fuqiang Liu, Baoshan Xing   +12 more
wiley   +1 more source

Pragmatic but Principled: Background report on Integrated Water Resource Management [PDF]

, 2010
IWRM is about integrated and "joined-up" management. It is about promoting integration across sectors, applications, groups in society and time, based upon an agreed set of principles.
Heath, Tom
core