Results 71 to 80 of about 53,922 (261)

P-V-T Behavior of 2,3,3,3-Tetrafluoroprop-1-ene (HFO-1234yf) in the Vapor Phase from (243 to 373) K [PDF]

, 2010
The P-V-T properties of 2,3,3,3-tetrafluoroprop-1-ene (CF 3 CFdCH 2 , HFO-1234yf), an environmentally friendly refrigerant, were measured using a constant volume apparatus.
Di Nicola, Cristiano, Di Nicola, Giovanni, Pacetti, Marco, Polonara, Fabio, Santori, Giulio   +4 more
core   +1 more source

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

Carbon 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, Mengge Song, Sunwen Xia, Kexin Jia, Wojciech Jerzak, Yusuf Makarfi Isa, Dongjing Liu, Xing Xie, Qingfa Zhang, Zhong Ma, Mingfeng Wang, Weiwei Liu, Shihong Zhang, Haiping Yang, Rock Keey Liew, Su Shiung Lam   +15 more
wiley   +1 more source

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

Earth 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

Dynamics of one-dimensional tight-binding models with arbitrary time-dependent external homogeneous fields

, 2012
The exact propagators of two one-dimensional systems with time-dependent external fields are presented by following the path-integral method. It is shown that the Bloch acceleration theorem can be generalized to the impulse-momentum theorem in quantum ...
A Eckardt, A Eckardt, AR Kolovsky, C Search, H Fukuyama, H Lignier, I Buluta, J Ma, JN Zhang, JQ Liao, JQ You, JQ You, K Kudo, L Zhou, L Zhou, L Zhou, L. Jin, M Steffen, M Wallquist, Q Thommen, S Yang, SN Shevchenko, T Hartmann, W. H. Hu, WH Hu, XF Cao, Z Song, Z. Song, ZL Xiang, ZL Xiang   +29 more
core   +1 more source

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

Chemie 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, Lukas Joos, Ursula Wittstadt, Torsten Will, Andreas Burger, Lena Schnabel, Stefan Henninger, Thorsten Klahm   +7 more
wiley   +1 more source

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

Chemie 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, Michael Libuda, Thomas Meyer, Christian Hoffmann, Jens‐Uwe Repke, Stefan Elbel   +5 more
wiley   +1 more source

Groundwater potential mapping in semi-arid region of Northern Nigeria by integrating analytic hierarchy process and GIS

Frontiers in Water
Groundwater resource management in drylands, characterized by climate variability and population growth, is difficult. Exploration and exploitation of groundwater, due to inadequate surface water is very costly. This study employed the analytic hierarchy
Abdulmutallib A. Saidu, Ali Aldrees, Salisu Dan'azumi, Sani I. Abba, Salahu M. Hamza   +4 more
doaj   +1 more source

Transport properties measurement on low GWP alternative refrigerants [PDF]

AIP Conference Proceedings, 2017
New experimental data on the thermal conductivity and the viscosity of low-GWP refrigerants such as HFOs are reported in order to contribute to the development of low-GWP refrigeration/heat pump systems. Accurate data on thermodynamic and transport properties are indispensable to design and to manufacture the systems with high efficiency.
Keishi Kariya, Mohammad Ariful Islam, Alam Md Jahangir, Hirotaka Ishida, Akio Miyara   +4 more
openaire   +1 more source

Potential Analysis of On‐Site Oxygen and Ozone Production for Wastewater Treatment Plants

Chemie Ingenieur Technik, EarlyView.
The potential of a power‐to‐gas process focusing on the oxygen stream to cover an upcoming demand of ozone at German wastewater treatment plants is analyzed. Economic and ecological parameters are compared to the conventional production of hydrogen and oxygen. Powered by on‐site produced wind energy, the process is deemed beneficial.
Vincenta Franßen, Paul Goerdten, Christian Hoffmann, Jens‐Uwe Repke   +3 more
wiley   +1 more source

Exploring the Environmental Sustainability of Primary Al-Air Batteries for Long-Term Energy Storage Applications. [PDF]

ChemSusChem
An exploratory life cycle assessment compares aluminum–air batteries with gaseous and liquefied hydrogen for long‐term energy storage. The results reveal strong trade‐offs between climate benefits, resource burdens, and system efficiency, highlighting key hot spots and showing how decarbonized smelting and circular material flows can improve the ...
Ersoy H, Baumann MJ, Jasper FB, Wulf C, Weil M, Ramos TB, Passerini S.   +6 more
europepmc   +2 more sources