alternative energy source
Recently Published Documents


TOTAL DOCUMENTS

259
(FIVE YEARS 95)

H-INDEX

17
(FIVE YEARS 5)

2022 ◽  
Vol 2022 ◽  
pp. 1-13
Author(s):  
Assefa Tesfaye ◽  
Fentahun Workie ◽  
Venkatesh S. Kumar

Biomass energy accounts for more than 92 percent of overall energy consumption in Ethiopia. As a result, Ethiopia is one of the world’s most biomass-dependent countries. The high reliance on wood fuels and agricultural residues for fuel harms society’s social, economic, and environmental well-being. This study aims to create and test the quality of fuel briquettes made from the coffee husk. Also built and produced are a carboniser/charcoal kiln, a manually operated molder system, and a briquette stove for burning the manufactured briquette. The carboniser converts 15 kg of raw coffee husk into 6 kg of carbonised char in 25 minutes, and the manually operated briquette molder can press 30 kg per hour. The efficiency of converting raw coffee husk into carbonised char content was 40.12%. In the geological survey of Ethiopia, the geochemical laboratory directorate received triplicate samples of the fuel briquette charcoal for analysis. Moisture content, fixed carbon content, ash content, sulfur content, and calorific value were determined using a bomb calorimeter and a ceramic lining furnace. Physical properties of fuel briquettes ranged from 10.03% moisture content, 970 kg/m3 density, 81% fixed carbon, 5.15% ash content, 0% sulfur, and 30.54 Kcal/kg higher heating value, according to laboratory results. The results of the study revealed that the coffee husk fuel briquettes produced have more positive characteristics. Fuel briquettes were cost-effective and environmentally friendly and reduced deforestation compared to firewood. This study clearly shows that briquettes made from coffee husk could be used as an alternative energy source when this kind of waste is well managed.


Energies ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 484
Author(s):  
Daniel Liberacki ◽  
Joanna Kocięcka ◽  
Piotr Stachowski ◽  
Roman Rolbiecki ◽  
Stanisław Rolbiecki ◽  
...  

Willows are one of the plants which can be used to produce biomass for energy purposes. Biomass production is classified as a renewable energy source. Increasing the share of renewable sources is one of the priority actions for European Union countries due to the need to reduce greenhouse gas emissions. To achieve the best possible growth of the willow and increase its biomass for fuel, it is crucial to provide optimal water conditions for its growth. The aim of the study was to determine the water requirements of willows under the conditions of the western Polish climate and to verify whether this area is potentially favourable for willow cultivation. The novelty of this paper lies in its multi-year climatic analysis in the context of willow water needs for the area of three voivodships: Lubusz, Lower Silesian, and West Pomeranian. This is one of the few willow water-needs analyses for this region which considers the potential for widespread willow cultivation and biomass production in western Poland. Reference evapotranspiration (ETo) was determined by the Blaney-Criddle equation and then, using plant coefficients, water needs for willow were determined. Calculations were carried out for the growing season lasting from 21 May to 31 October. The estimated water needs during the vegetation season amounted on average to 408 mm for the West Pomeranian Voivodeship, 405 mm for the Lubusz Voivodeship, and 402 mm for the Lower Silesian Voivodeship. The conducted analysis of variance (ANOVA) showed that these needs do not differ significantly between the voivodeships. Therefore, it can be concluded that the water requirements of willows in western Poland do not differ significantly, and the whole region shows similar water conditions for willow cultivation. Furthermore, it was found that water needs are increasing from decade to decade, making rational water management necessary. This is particularly important in countries with limited water resources, such as Poland. Correctly determining the water requirements of willow and applying them to the cultivation of this plant should increase the biomass obtained. With appropriate management, willow cultivation in Poland can provide an alternative energy source to coal.


2022 ◽  
pp. 277-297
Author(s):  
Shinjini Paul Choudhury ◽  
Biswanath Saha ◽  
Izharul Haq ◽  
Ajay S Kalamdhad

2021 ◽  
Vol 2 (4) ◽  
Author(s):  
Moojin Kim

Energy harvesting through motion caused by wind is a unique way of finding an alternative energy source for several electronic devices. Piezo-electronic sensors, which harvest energy from small vibrations and movements, are investigated by many researchers nowadays. This paper conducted an experimental study to find an alternative energy source for diverse electronics with forced oscillations from a fan. The relations between the force applied by wind and the oscillation of a paper strip were studied.


2021 ◽  
Vol 2021 (4) ◽  
pp. 601-610
Author(s):  
Iliya A. TEREKHIN ◽  
◽  
Alexander Yu. BALAKIN ◽  

Objective: To assess the possibility of using alternative sources of electrical energy to power auxiliaries of traction substations of power supply divisions on the example of ECHE-20 “Bronevayaˮ. Methods: Alternative energy is used on the railways. Results: Equipment was selected and a solar power plant was designed, economic effi ciency from the introduction of an alternative energy source and its payback period were calculated. Practical importance: The designed alternative source of electrical energy makes it possible to increase the energy effi ciency indicators of production processes of railway transport


Author(s):  
Dwi Pangga ◽  
Sukainil Ahzan ◽  
Habibi Habibi ◽  
A’an Hardiyansyah Putra Wijaya ◽  
Linda Sekar Utami

ABSTRAKTujuan dari penelitian ini yaitu untuk menghasilkan briket tongkol jagung sebagai alternative sumber energi yang memiliki nilai kalor yang tinggi. Briket tongkol jagung dibuat dari tongkol jagung yang sudah dikeringkan dan dihaluskan sebelumnya dengan ukuran 20 mesh. Masing-masing perlakuan dicetak dengan variasi persentase perekat tepung tapioka yaitu 5%, 10%, dan 15%. Selain variasi perekat dilakukan juga variasi tekanan pembentukannya untuk melihat komposisi terbaik yang menghasilkan nilai kalor yang tinggi dan laju pembakaran yang sesuai. Briket selanjutnya diuji nilai kalor dan laju pembakarannya dengan menggunakan alat bom calorimeter. Hasil penelitian menunjukkan bahwa secara berturut-turut nilai kalor dan laju pembakaran briket dengan persentase komposisi perekat 5%, 10%, 15% yaitu 21,00 kJ, 22,68 kJ, 31,08 kJ, dan 12,00 gram/menit, 13,33 gram/menit, 13,50 gram/menit. Hasil terbaik dihasilkan pada komposisi persentase perekat 15% dengan nilai kalor mencapai 31,08 kJ, dan laju pembakaran 13,50 gram/menit yang tidak terlalu jauh meningkat dibandingkan dengan komposisi persentase perekat lainnya. Kata kunci: briket; tongkol jagung; nilai kalor; laju pembakaran  ABSTRACTThe purpose of this research is to produce corn cobs briquettes as an alternative energy source that has a high calorific value. Corn cobs briquettes are made from corn cobs that have been dried and previously mashed with a size of 20 mesh. Each treatment was printed with variations in the percentage of tapioca starch adhesive, namely 5%, 10%, and 15%. In addition to variations of the adhesive, variations in the formation pressure were also carried out to see the best composition that produced a high heating value and an appropriate combustion rate. The briquettes were then tested for calorific value and rate of combustion using a bomb calorimeter. The results showed that the calorific value and burning rate of briquettes with the percentage of adhesive composition 5%, 10%, 15%, were 21.00 kJ, 22.68 kJ, 31.08 kJ, and 12.00 gram/minute, respectively. 13.33 grams/minute, 13.50 grams/minute. The best results were obtained at 15% adhesive percentage composition with a calorific value of 31.08 kJ, and a burning rate of 13.50 gram/minute which was not significantly increased compared to other adhesive percentage compositions. Keywords: briquettes; corn cobs; calorific value; combustion rate


2021 ◽  
Vol 886 (1) ◽  
pp. 012118
Author(s):  
Zakiah Uslinawaty ◽  
Rosmarlinasiah ◽  
Niken Pujirahayu ◽  
Nurhayati Hadjar ◽  
La Mirdawali

Abstract One of the trees that has fruit with high acid content that has the potential to be used as an alternative energy source is the acid contained in Singi (Dillenia serrata Thunb.) fruit. Therefore, this study aims to test the ability of the singi fruit to turn on the LED lights and determine the value of voltage, current and electrical power in the fruit. This research was conducted at the Laboratory Ministry of Forestry, Faculty of Forestry and Environmental Sciences, Halu Oleo University. In June-July 2019 using an experimental method for 5 days by measuring the acidity (pH) value of voltage, current and electric power. The results showed that the LED was on until the 5th day but the value of the electricity content tended to decrease, namely the first day with a power value of 7.533 watts and the fifth day 1.722 watts. While the acidity (pH) of the singi fruit which is decreasing over time affects the value of the electrical content contained in the solution of the singi fruit.


2021 ◽  
Vol 8 ◽  
Author(s):  
Jose Enrique de la Rubia Ortí ◽  
David Fernández ◽  
Félix Platero ◽  
María Pilar García-Pardo

Background: Alzheimer's disease is the most common neurodegenerative disorder in our society, mainly characterized by loss of cognitive function. However, other symptoms such as anxiety and depression have been described in patients. The process is mediated by alterations in the synaptic and extrasynaptic activity of the neurotransmitter glutamate, which are linked to a hypometabolism of glucose as the main source of brain energy. In that respect, Ketogenic diet (KD) has been proposed as a non-pharmacological treatment serving as an alternative energy source to the neurons increasing the fat percentage and reducing the carbohydrates percentage, showing promising results to improve the cognitive symptoms associated with different neurodegenerative disorders, including AD. However, the association of this type of diet with emotional symptoms and the modulation of glutamate neurotransmission systems after this dietary reduction of carbohydrates are unknown.Objective: The aim of this short review is to provide update studies and discuss about the relationship between KD, anxiety, depression, and glutamate activity in AD patients.Discussion: The main results suggest that the KD is an alternative energy source for neurons in AD with positive consequences for the brain at different levels such as epigenetic, metabolic and signaling, and that the substitution of carbohydrates for fats is also associated with emotional symptoms and glutamate activity in AD.


2021 ◽  
Vol 878 (1) ◽  
pp. 012067
Author(s):  
B Orlando ◽  
M D Sebayang ◽  
R Samosir

Abstract Re-Design Stalled Water Pump in Middle Siberut sub-district to be used again by using solar panel as an alternative energy source. Solar Panels used in this re-design are 48 pieces with capacity 200 WP. Energy produced from solar panels is stored in batteries with capacity 48 volts 400 Ah. Electrical equipment used is still alternating voltage, an inverter is needed so that can change the voltage in the same direction produced on solar panels be alternating voltage which will then be used as a source of electrical energy for activate water pump as well as other electrical equipment.


Author(s):  
Amalia Amira Rashidah ◽  
Amar Lohot Tanjung ◽  
Sindi H Sembiring

Charcoal is the residual waste from the heat decomposition process of carbon-containing materials, most of whose components are carbon. This study aims to determine the frequency of charcoal water as an electrolyte solution to produce an alternative energy source that is environmentally friendly. The method used in the experiment is to find the type of water with the addition of zinc and copper and to measure the sample voltage of charcoal water to determine the optimum mass and optimum interaction time. The variation in the volume of water with 50 ml and 100 ml of charcoal water was produced, with the addition of zinc and copper in the size of 1x5 cm, 2x5 cm, 3x5 cm which resulted in fluctuations in each data. For example, the difference in voltage value in the type of water used is tap water, 100 ml well water with the addition of zinc and copper measuring 2x5 cm. Tap water, namely with an electric voltage of 0.65 V, 0.70 V, 0.60 V, 0.60 V, 0.75 V and well water with an electric voltage of 0.60 V, 0.55 V, 0.55 V, 0.55 V, 0.55 V. Less than the maximum frequency produced with two glasses that are not made into a series or parallel circuit.


Sign in / Sign up

Export Citation Format

Share Document