1 December 25, 2019
Articles
1. Le Vinh Thang, Anatolii V. Schagin, Ngo Xuan Cuong, Nguyen Thi Hong
Construction and Simulation of a Water Cooling System Controller for PV Modules: Some Initial Results
European Journal of Renewable Energy, 2019, 4(1): 3-11.
Number of views: 352 Download in PDF
2. A.L. Ujoatuonu, E.L. Efurumibe, P.I. Ekwo, Efurumibe, J. NwoguEuropean Journal of Renewable Energy, 2019, 4(1): 3-11.
Abstract:
In recent years, equipment for the use of solar energy has been actively developing in the world, which provides heat and electricity. In particular, photovoltaic technology using photovoltaic modules is widely used. This paper focuses on cooling controllers for the surface of photovoltaic modules to reduce surface temperatures, increase their output power and improve the performance of photovoltaic systems. The paper presented the design, simulation and construction of water cooling system controller for photovoltaic modules. The application of water cooling system controller for grid-connected photovoltaic system with 250 Wp has brought good results. The experiments were conducted at Central Vietnam, the water cooling system controller is set to automatically work so that when the surface temperature reaches 40oC, after each operation the power of the grid-connected photovoltaic system increased significantly. The results also indicate that the power consumption of the water cooling system controller is much smaller than the increased power of grid-connected photovoltaic system.
In recent years, equipment for the use of solar energy has been actively developing in the world, which provides heat and electricity. In particular, photovoltaic technology using photovoltaic modules is widely used. This paper focuses on cooling controllers for the surface of photovoltaic modules to reduce surface temperatures, increase their output power and improve the performance of photovoltaic systems. The paper presented the design, simulation and construction of water cooling system controller for photovoltaic modules. The application of water cooling system controller for grid-connected photovoltaic system with 250 Wp has brought good results. The experiments were conducted at Central Vietnam, the water cooling system controller is set to automatically work so that when the surface temperature reaches 40oC, after each operation the power of the grid-connected photovoltaic system increased significantly. The results also indicate that the power consumption of the water cooling system controller is much smaller than the increased power of grid-connected photovoltaic system.
Number of views: 352 Download in PDF
Extraction and Optical Characterization of the Active Ingredient in Solanium Melongena Extract
European Journal of Renewable Energy, 2019, 4(1): 12-19.
Number of views: 337 Download in PDF
3. European Journal of Renewable Energy, 2019, 4(1): 12-19.
Abstract:
In carrying out the experiment, first liquid extract was obtained from Solanium Melongena leaves using solvent extraction method at room temperature of 300K with acetone solvent. The liquid extract was concentrated to a certain degree using a rotary evaporator and the concentrated extracts were afterwards analyzed using a Hewlett-Packard 6890 gas chromatography mass spectrometer. Following additional analysis of the extract, it was observed that Solanium melongena extract contains 2, 3, 5, 6-tetraisopropylpyrazine (5.15 %), 6-octadecenoic acid (33.84 %), 1-(hydroxymethyl)-1, 2-ethanediyl ester (2.60 %) and stearic acid (20.68 %) as the active ingredients. The result of optical characterization using a Jenway 6405 UV-Visible spectrophotometer revealed that Solanium Melongena extract has optical band gap range from 1.10eV to 1.20eV.
In carrying out the experiment, first liquid extract was obtained from Solanium Melongena leaves using solvent extraction method at room temperature of 300K with acetone solvent. The liquid extract was concentrated to a certain degree using a rotary evaporator and the concentrated extracts were afterwards analyzed using a Hewlett-Packard 6890 gas chromatography mass spectrometer. Following additional analysis of the extract, it was observed that Solanium melongena extract contains 2, 3, 5, 6-tetraisopropylpyrazine (5.15 %), 6-octadecenoic acid (33.84 %), 1-(hydroxymethyl)-1, 2-ethanediyl ester (2.60 %) and stearic acid (20.68 %) as the active ingredients. The result of optical characterization using a Jenway 6405 UV-Visible spectrophotometer revealed that Solanium Melongena extract has optical band gap range from 1.10eV to 1.20eV.
Number of views: 337 Download in PDF