scholarly journals Solar Energy Storage via Thermochemical Metal Oxide/Metal Sulfate Water Splitting Cycle

MRS Advances ◽  
2018 ◽  
Vol 3 (24) ◽  
pp. 1341-1346
Author(s):  
Rahul R. Bhosale ◽  
Anand Kumar ◽  
Fares AlMomani ◽  
Majeda Khraisheh ◽  
Gorakshnath Takalkar
Keyword(s):  
Solar Energy ◽  
Water Splitting ◽  
Flow Rate ◽  
Energy Conversion Efficiency ◽  
Efficiency Analysis ◽  
Thermodynamic Efficiency ◽  
Metal Sulfate ◽  
Molar Flow Rate ◽  
Solar Energy Input ◽  
Hsc Chemistry

ABSTRACTThis paper reports the effect of Ar molar flow-rate on thermodynamic efficiency analysis of zinc oxide-zinc sulfate (ZnS-ZnO) water splitting cycle useful for solar H2 production. The thermodynamic efficiency analysis is conducted using the HSC Chemistry 7.1 software and its thermodynamic database. Influence of Ar molar flow-rate on total solar energy input essential for the continuous operation of the cycle is explored. Furthermore, the solar-to-fuel energy conversion efficiency for the ZnS-ZnO water splitting cycle is determined.

scholarly journals Solar Thermochemical Conversion of Carbon Dioxide into Fuel via MnFe2O4 based Two-Step Redox Cycle

2021 ◽  
Author(s):  
Rahul Bhosale
Keyword(s):  
Flow Rate ◽  
Heat Recovery ◽  
Energy Conversion Efficiency ◽  
Efficiency Analysis ◽  
Thermochemical Conversion ◽  
Thermodynamic Efficiency ◽  
Molar Flow Rate ◽  
The Difference ◽  
Cycle Equation ◽  
Hsc Chemistry

Abstract Thermodynamic efficiency analysis of [[EQUATION]] based CO 2 splitting (CDS) cycle is reported. HSC Chemistry software is used for performing the calculations allied with the model developed. By maintaining the reduction nonstoichiometry equal to 0.1, variations in the thermal energy required to drive the cycle ( [[EQUATION]] ) and solar-to-fuel energy conversion efficiency ( [[EQUATION]] ) as a function of the ratio of the molar flow rate of inert sweep gas ( [[EQUATION]] ) to the molar flow rate [[EQUATION]] ( [[EQUATION]] ), i.e., [[EQUATION]] , reduction temperature ( [[EQUATION]] ), and gas-to-gas heat recovery effectiveness ( [[EQUATION]] ) are studied. The rise in [[EQUATION]] is responsible for the decrease in [[EQUATION]] . At [[EQUATION]] = 0.7, [[EQUATION]] increases from 176.0 kW to 271.7 kW when [[EQUATION]] escalates from 10 to 100. Conversely, [[EQUATION]] reduces from 14.9% to 9.9% due to the similar increment in [[EQUATION]] . The difference between [[EQUATION]] at [[EQUATION]] = 10 and 100 decreases from 363.3 kW to 19.2 kW as [[EQUATION]] rises from 0.0 to 0.9. As [[EQUATION]] and subsequently [[EQUATION]] reduces as a function of [[EQUATION]] , [[EQUATION]] increases noticeably. At [[EQUATION]] equal to 0.9 and [[EQUATION]] equal to 10 as well as 20, the maximum [[EQUATION]] equal to 17.5% is realized.

Hierarchical Ti1−xZrxO2−y nanocrystals with exposed high energy facets showing co-catalyst free solar light driven water splitting and improved light to energy conversion efficiency

2017 ◽  
Vol 5 (33) ◽  
pp. 17341-17351 ◽  
Author(s):  
Shreyasi Chattopadhyay ◽  
Swastik Mondal ◽  
Goutam De
Keyword(s):  
Solar Energy ◽  
Energy Conversion ◽  
Single Crystals ◽  
Water Splitting ◽  
Conversion Efficiency ◽  
Energy Conversion Efficiency ◽  
High Energy ◽  
Co Catalyst ◽  
Solar Water Splitting ◽  
Catalyst Free

Ti1−xZrxO2−y single crystals with exposed high energy facets and defects show co-catalyst free solar water splitting and high solar energy conversion in DSSCs.

Integrating a redox flow battery into a Z-scheme water splitting system for enhancing the solar energy conversion efficiency

2019 ◽  
Vol 12 (2) ◽  
pp. 631-639 ◽  
Author(s):  
Zhen Li ◽  
Wangyin Wang ◽  
Shichao Liao ◽  
Mingyao Liu ◽  
Yu Qi ◽  
...  
Keyword(s):  
Solar Energy ◽  
Energy Conversion ◽  
Water Splitting ◽  
Conversion Efficiency ◽  
Solar Energy Conversion ◽  
Energy Conversion Efficiency ◽  
Hydrogen Energy ◽  
Redox Flow Battery ◽  
Solar Energy Conversion Efficiency ◽  
Splitting System

A RFB-integrated Z-scheme water splitting system produces hydrogen energy and electricity for efficient solar energy conversion.

scholarly journals TiO2 nanotubes with ultrathin walls for enhanced water splitting

2015 ◽  
Vol 51 (63) ◽  
pp. 12617-12620 ◽  
Author(s):  
Ahmad M. Mohamed ◽  
Amina S. Aljaber ◽  
Siham Y. AlQaradawi ◽  
Nageh K. Allam
Keyword(s):  
Solar Energy ◽  
Energy Conversion ◽  
Water Splitting ◽  
Conversion Efficiency ◽  
Wall Thickness ◽  
Tio2 Nanotubes ◽  
Solar Energy Conversion ◽  
Energy Conversion Efficiency ◽  
Solar Energy Conversion Efficiency

Nanotube wall thickness determines its solar energy conversion efficiency.

Synthesis of SnS:Ag nanosheets for solar energy water splitting

2021 ◽  
pp. 130158
Author(s):  
Meng Cao ◽  
Yongsheng Guan ◽  
Jiaying Bie ◽  
Xiang Zhang ◽  
Huipei Gong ◽  
...  
Keyword(s):  
Solar Energy ◽  
Water Splitting

Transition metal-based layered double hydroxides for photo(electro)chemical water splitting：a mini review

Nanoscale ◽  
2021 ◽  
Author(s):  
Rui Gao ◽  
Jia Zhu ◽  
Dongpeng Yan
Keyword(s):  
Transition Metal ◽  
Solar Energy ◽  
Water Splitting ◽  
Layered Double Hydroxides ◽  
Hydrogen Gas ◽  
Carbon Neutral ◽  
Double Hydroxides ◽  
Chemical Water

The conversion of solar energy into the usable chemical fuels, such as hydrogen gas, via photo(electro)chemical water splitting is a promising approach for creating a carbon neutral energy ecosystem. The...

SIn2Te/TeIn2Se: a type-II heterojunction as water-splitting photocatalyst with high solar energy harvesting

2021 ◽  
Author(s):  
Peishen Shang ◽  
Chunxiao Zhang ◽  
Mengshi Zhou ◽  
Chaoyu He ◽  
Tao Ouyang ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Solar Energy ◽  
Water Splitting ◽  
First Principles ◽  
Type Ii ◽  
Two Dimensional ◽  
First Principles Calculations ◽  
Solar Energy Harvesting ◽  
Renewable Hydrogen

Searching for photocatalysts is crucial for the production of renewable hydrogen from water. Two-dimensional (2D) vdW heterojunctions show great potential. Using first- principles calculations within the HSE06 functional, we propose...

scholarly journals Experimental Investigation and Modeling of Inertance Tubes

2005 ◽  
Vol 127 (5) ◽  
pp. 1029-1037 ◽  
Author(s):  
L. O. Schunk ◽  
G. F. Nellis ◽  
J. M. Pfotenhauer
Keyword(s):  
Mass Flow Rate ◽  
Mass Flow ◽  
Flow Rate ◽  
Acoustic Power ◽  
Operating Conditions ◽  
Thermodynamic Efficiency ◽  
Pulse Tube ◽  
Design Charts ◽  
Wide Range ◽  
Pulse Tube Refrigerators

Growing interest in larger scale pulse tubes has focused attention on optimizing their thermodynamic efficiency. For Stirling-type pulse tubes, the performance is governed by the phase difference between the pressure and mass flow, a characteristic that can be conveniently adjusted through the use of inertance tubes. In this paper we present a model in which the inertance tube is divided into a large number of increments; each increment is represented by a resistance, compliance, and inertance. This model can include local variations along the inertance tube and is capable of predicting pressure, mass flow rate, and the phase between these quantities at any location in the inertance tube as well as in the attached reservoir. The model is verified through careful comparison with those quantities that can be easily and reliably measured; these include the pressure variations along the length of the inertance tube and the mass flow rate into the reservoir. These experimental quantities are shown to be in good agreement with the model’s predictions over a wide range of operating conditions. Design charts are subsequently generated using the model and are presented for various operating conditions in order to facilitate the design of inertance tubes for pulse tube refrigerators. These design charts enable the pulse tube designer to select an inertance tube geometry that achieves a desired phase shift for a given level of acoustic power.

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