Renewable Energy
Sumi Kumari; Deepak Bhatia; Praveen Agarwal; S . A Edalatpanah
Abstract
This paper illustrates the process for creating innovative nano-heterostructures (NHs) and compares how well they perform electrochemically when used as supercapacitor electrodes. The created supercapacitor electrodes for Co-Mn core/shell and Co-Mn/ Co3O4-MnO2 core/shell nano-heterostructures offer the ...
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This paper illustrates the process for creating innovative nano-heterostructures (NHs) and compares how well they perform electrochemically when used as supercapacitor electrodes. The created supercapacitor electrodes for Co-Mn core/shell and Co-Mn/ Co3O4-MnO2 core/shell nano-heterostructures offer the requisite macroporosity to facilitate electrolyte flow, hence lowering device resistance, and nanoporosity with large surface area to enable quicker reaction kinetics. Co-Mn core/shell and Co-Mn/ Co3O4-MnO2 core/shell supercapacitor electrodes both displayed specific capacitance values (731 and 2013 F g-1, respectively, at a constant current density of 2.5 A g-1), high energy (36.5 and 44.7 Wh kg-1, respectively), power density (7.5 and 5.6 kW kg-1, respectively), good capacitance retention, and long cyclicality in a three electrode configuration. Based on the efficient nano-architectural design of the electrode and the coexistence of highly redox active materials at the surface supported by highly conducting metal channels at the core for faster charge transport, the remarkable electrochemical property of the large surface area nano-heterostructures is demonstrated.
Renewable Energy
Filscha Nurprihatin; Agnes Octa; Tasya Regina; Tony Wijaya; Julliete Luin; Hendy Tannady
Abstract
From 2001 to the present, natural gas production in Indonesia dominates petroleum production. Most of the natural gas is used for export until 2013. From 2014 until now, most of the natural gas production is being utilized for domestic with an increasing trend. Domestic gas usage for households is still ...
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From 2001 to the present, natural gas production in Indonesia dominates petroleum production. Most of the natural gas is used for export until 2013. From 2014 until now, most of the natural gas production is being utilized for domestic with an increasing trend. Domestic gas usage for households is still far below industry and commercial sectors. Domestic gas usage in the household can be done in two ways, namely city gas and Liquefied Petroleum Gas cylinder. The use of city gas is better in terms of price, mitigation, and gas emission. The government plans to build a new city gas network for 4,000 households. This study aim is to propose the design of city gas network, so the construction and operational costs become minimal. This research uses three stages, namely division of region by using the clustering algorithm, the gas network route determination using heuristics algorithm, and determination of the feasibility using the Benefit-Cost Ratio. We have successfully calculated the maximum region’s capacity by making use of Weymouth Formula. The iterative clustering algorithm is done to make sure the location of Distribution Centers is well-defined. We modified the distance measurement by preferring driving distance rather than Euclidean in the interest of precision. In the end, we also discuss the feasibility study of the project. Based on the calculation, we have obtained that the gas network development project is feasible to run.
Thermal Comfort
Abdullah. N. Olimat; Ahmed Al-Salaymeh; Ayman Al-Maaitah
Abstract
Experimental analysis of thermal properties of phase change material was conducted using DCS and TG apparatus. Moderate rang of temperature of phase change material was selected and experimentally investigated. Measurement of melting and solidification temperature at several heating rate are carried ...
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Experimental analysis of thermal properties of phase change material was conducted using DCS and TG apparatus. Moderate rang of temperature of phase change material was selected and experimentally investigated. Measurement of melting and solidification temperature at several heating rate are carried out. Furthermore, the stability and thermal decomposition of the selected phase change material are also investigated. Experiment demonstrates clearly the phase change material effect in melting and solidification. The lab test with DSC and TG proves that the catalogue data of the Plus ICE H190 PCM is reasonable to be used for thermal storage devices with great deal of consistency. In general, results showed that the utilization of phase change material in thermal storage is feasible to store and extract heat at constant temperature in the range between 170oC to 200oC which has many applications in engineering and industry.
