Results 91 to 100 of about 25,657 (311)

Comparative analysis of HFO-1234ze(E) and R-515B as low GWP alternatives to HFC-134a in moderately high temperature heat pumps

open access: yes, 2020
This study provides a theoretical comprehensive performance and environmental analysis of the hydrofluoroolefin HFO-1234ze(E) and the mixture R-515B as alternative low global warming potential (GWP) refrigerants to replace the hydrofluorocarbon HFC-134a ...
C. Mateu-Royo   +3 more
semanticscholar   +1 more source

Engineering Biochar‐Derived Functional Materials for High‐Performance Supercapacitors: Design Principles, Mechanisms, and Scalable Strategies

open access: yesCarbon Energy, EarlyView.
ABSTRACT Biochar has emerged as a useful and adaptable source of carbon for supercapacitor electrodes. Its value comes from the way biomass chemistry, thermal conversion, and activation conditions shape the resulting pore network, surface groups, and degree of carbon ordering.
Soumen Mandal   +6 more
wiley   +1 more source

Linear regression between the GWP and the MPH-GWP of reciprocal combinations and the GDI.

open access: yes, 2014
a. Quadratic regression between the GDI and the GWP of group 1; the peak is at GDI = 0.3645. b. Quadratic regression between the GDI and the MPH-GWP of group 1; the peak is at GDI = 0.378. c.
Guoxin Yao (542679)   +8 more
core   +1 more source

Oxidative Fast Pyrolysis Enabling Autothermal Production of Porous Functionalized Biochar and Anhydrosugar/Phenol‐Rich Bio‐Oil From Biomass

open access: yesCarbon Energy, EarlyView.
Oxidative fast pyrolysis of biomass enables autothermal production of value‐added products. ABSTRACT Oxidative fast pyrolysis can potentially overcome the heat‐supply bottleneck of conventional fast pyrolysis by enabling autothermal operation while also tailoring product quality through controlled oxygen addition.
Bin Li   +15 more
wiley   +1 more source

Radiative efficiencies and global warming potentials of agricultural fumigants

open access: yesEnvironmental Research Communications, 2023
A rounded assessment of the environmental impacts of fumigants used within the agricultural sector must consider the potential climate impacts of their release into the atmosphere. Within policy settings, the 100-year Global Warming Potential (GWP _100 )
Keith P Shine, Yi Kang
doaj   +1 more source

Multi-objective optimization of low-GWP mixture composition and heat exchanger circuitry configuration for improved system performance and reduced refrigerant flammability

open access: yes, 2021
The recently introduced hydrofluoroolefin (HFO) refrigerants, including R1234yf and R1234ze(E), have significantly lower global warming potentials (GWPs) than traditional hydrofluorocarbon (HFC) refrigerants like R410A.
Zhenning Li   +2 more
semanticscholar   +1 more source

Energy‐Efficient Induction Carbonization: Tailoring Pore Structures in Hard Carbon Anodes Toward Enhanced Electrochemical Performance

open access: yesCarbon Energy, EarlyView.
ABSTRACT Hard carbon (HC) is currently the predominant anode material for sodium‐ion batteries; however, its practical application is still limited by insufficient initial Coulombic efficiency (ICE) and plateau capacity. Meanwhile, conventional HC production relies on energy‐intensive carbonization processes with considerable carbon emissions. Here, an
Yanghao Jin   +18 more
wiley   +1 more source

On the relationship between metrics to compare greenhouse gases – the case of IGTP, GWP and SGTP [PDF]

open access: yesEarth System Dynamics, 2012
Metrics for comparing greenhouse gases are analyzed, with a particular focus on the integrated temperature change potential (IGTP) following a call from IPCC to investigate this metric.
D. J. A. Johansson, C. Azar
doaj   +1 more source

High‐Temperature Heat Pump Test Bench with n‐Butane (R‐600) Generating Steam

open access: yesChemie Ingenieur Technik, EarlyView.
This work involves building a test bench for a high‐temperature heat pump (HTHP) and analyzing the measurements. The focus is on steam generation using an HTHP to decarbonize process steam demand. The findings indicate that stable steam generation is possible, providing a higher heat transfer coefficient in the heat pump's condenser.
Sebastian Benkert   +7 more
wiley   +1 more source

A Methodology to Integrate Closed‐Cycle Heat Pumps into Batch Distillation Columns

open access: yesChemie Ingenieur Technik, EarlyView.
Batch distillation often cannot use vapor recompression due to contamination risks in food and pharma. This study proposes a design for integrating closed‐loop heat pumps using natural fluids. Results show significant energy savings, offering a sustainable alternative to traditional setups.
Philipp Dorn   +5 more
wiley   +1 more source

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