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International Journal of Renewable Energy Development
Published by Universitas Diponegoro
ISSN : 22524940     EISSN : -     DOI : -
Core Subject : Science,
The scope of journal encompasses: Photovoltaic technology, Solar thermal applications, Biomass, Wind energy technology, Material science and technology, Low energy Architecture, Geothermal energy, Wave and Tidal energy, Hydro power, Hydrogen Production Technology, Energy Policy, Socio-economic on energy, Energy efficiency and management The journal was first introduced in February 2012 and regularly published online three times a year (February, July, October).
Arjuna Subject : -
Articles 263 Documents
ANALYSING THE POSSIBILITY OF EXTRACTING ENERGY FROM OCEAN WAVES IN CABO-VERDE TO PRODUCE CLEAN ELECTRICITY - CASE-STUDY: THE LEEWARD ISLANDS Leger Monteiro, Wilson Madaleno; Sarmento, António
International Journal of Renewable Energy Development Vol 8, No 1 (2019): February 2019
Publisher : Center of Biomass & Renewable Energy, Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (13.691 KB) | DOI: 10.14710/ijred.8.1.103-112

Abstract

This work analyses the possibility of extracting energy from the ocean waves around the Leeward Islands of Cabo-Verde. This study was based on 31 years of wave and wind data, obtained through the SOWFIA - Streamlining of Ocean Wave Farm Impact Assessment, at 16° N-24° W. Then, the SWAN - Simulating Waves Nearshores - was used to perform the wave transformations to the shore. As the number of waves is very high, the cluster analysis and the Non-Parametric Wilcoxon Test were used to reduce the computing time by SWAN. The results pointed to the South of these islands and the East Coast of Maio island as the best locations for wave energy extraction. The use of the power matrix of some commercial devices that are available, such as Wave Dragon (7 MW), Pelamis (750 kW) and AquaBuoy (250 kW), allowed to estimate the best devices scale factors that leads to their best Capacity Factor (CF), at the target regions. Thus, the Wave Dragon is the most indicated device (CF=71%), at the scale of 0.3, followed by AquaBuoy scaled by 0.4 (CF=57%) and Pelamis scaled by 0.5, with CF=26%. However, in a natural scale, AquaBuoy is the most efficient device (CF = 18.8%) in comparison to the Wave Dragon (CF=17%) and Pelamis (CF=15%). AquaBuoy presented the best cost-benefit ratio (C/B = 0.135 USD/kWh) followed by Wave Dragon (C/B= 0.235 USD/kWh) and Pelamis (C/B = 0.390 USD/kWh). The limitation of the number of Wave Energy Converters to implement the wave power plant affects negatively the cost of its investment.©2019. CBIORE-IJRED. All rights reservedArticle History: Received March 27th 2018; Received in revised form October 16th 2018; Accepted January 5th 2019; Available onlineHow to Cite This Article: Monteiro, W.M.L., and Sarmento, A (2019). Analysing the Possibility of Extracting Energy from Ocean Waves in Cabo-Verde to Produce Clean Electricity - Case-Study: The Leeward Islands. Int. Journal of Renewable Energy Development, 8(1), 103-112https://doi.org/10.14710/ijred.8.1.103-112
OPTIMAL COST OF A SOLAR PHOTOVOLTAIC SYSTEM FOR A REMOTE HOUSE IN BIHAR Jha, Sujit Kumar
International Journal of Renewable Energy Development Vol 4, No 2 (2015): July 2015
Publisher : Center of Biomass & Renewable Energy, Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (804.523 KB) | DOI: 10.14710/ijred.4.2.153-161

Abstract

Energy plays a vital role for the growth of a country. Solar energy is the most important renewable energy resources that can play vital role in the replacement of fossil resources to generate clean energy. Due to technological developments in solar power technologies, solar energy can be used for cooling, heating, and daily electricity demand of the world and emerged as viable alternative to produce clean energy in future. The paper describes the technological development of PV model, its present status and future opportunities in the context of Bihar, India. The study was carried out in Bihar, global solar radiation data is required for the calculation and assessment of the working principles of PV system installed at remotely located house to provide adequate power backup. The case study has been based on the solar radiation data available in Bihar, India, the cost of a suitable PV model for a house has been computed based on the analysis of power requirement of a houses in a day.
THERMAL EFFECTS INVESTIGATION ON ELECTRICAL PROPERTIES OF SILICON SOLAR CELLS TREATED BY LASER IRRADIATION Pourakbar Saffar, Ali; Deldadeh Barani, Bahman
International Journal of Renewable Energy Development Vol 3, No 3 (2014): October 2014
Publisher : Center of Biomass & Renewable Energy, Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (719.348 KB) | DOI: 10.14710/ijred.3.3.184-187

Abstract

In this paper, we were investigated electrical properties of monocrystalline and polycrystalline silicon solar cells due to laser irradiation with 650 nm wavelength in two states, proximate irradiation and via optics setup. Thermal effect on the cell surface due to laser irradiation was investigated on electrical properties too. Electrical parameters investigation of solar cells illustrates cell excitement via laser irradiation and efficiency decreases due to cell surface temperature increase. Monocrystalline parameters change with uniform shape due to thermal effect and laser irradiation toward polycrystalline cells.
IMPACT OF BLANKET CONFIGURATION ON THE DESIGN OF A FUSION-DRIVEN TRANSMUTATION REACTOR Hong, Bong Guen
International Journal of Renewable Energy Development Vol 7, No 1 (2018): February 2018
Publisher : Center of Biomass & Renewable Energy, Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (613.883 KB) | DOI: 10.14710/ijred.7.1.65-70

Abstract

A configuration of a fusion-driven transmutation reactor with a low aspect ratio tokamak-type neutron source was determined in a self-consistent manner by using coupled analysis of tokamak systems and neutron transport. We investigated the impact of blanket configuration on the characteristics of a fusion-driven transmutation reactor. It was shown that by merging the TRU burning blanket and tritium breeding blanket, which uses PbLi as the tritium breeding material and as coolant, effective transmutation is possible. The TRU transmutation capability can be improved with a reduced blanket thickness, and fast fluence at the first wall can be reduced. Article History: Received: July 10th 2017; Received: Dec 17th 2017; Accepted: February 2nd 2018; Available onlineHow to Cite This Article: Hong, B.G. (2018) Impact of Blanket Configuration on the Design of a Fusion-Driven Transmutation Reactor. International Journal of Renewable Energy Development, 7(1), 65-70.https://doi.org/10.14710/ijred.7.1.65-70
PRELIMINARY INVESTIGATION ON GENERATION OF ELECTRICITY USING MICRO WIND TURBINES PLACED ON A CAR Chaudhary, Yogendra; Bangi, Vijaya; Guduru, Ramesh; Aung, Kendrick; Reddy, Ganesh
International Journal of Renewable Energy Development Vol 6, No 1 (2017): February 2017
Publisher : Center of Biomass & Renewable Energy, Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (12.841 KB) | DOI: 10.14710/ijred.6.1.75-81

Abstract

Wind energy is one of the prominent resources for renewable energy and it is traditionally extracted using stationary wind turbines. However, it can also be extracted using mini or micro wind turbines on a moving body, such as an automobile, while cruising at high speeds on freeways. If the electricity is produced using air flowing around the vehicle without affecting aerodynamic performance of the vehicle, it can be used to charge up the battery or power up additional accessories of the vehicle. For the first time, in the present work, a preliminary investigation was carried out to generate electricity by utilizing air flow on a moving car. Initially, a correlation between the car speed and wind velocity was established using an anemometer. Placing a set of two micro wind turbines along with two micro generators on the rear end of the car trunk, the present study investigated the feasibility of generating electricity from these micro wind turbines while evaluating the effect of drag force on the performance of the car through the experimental approach and computational fluid dynamics (CFD) simulations. Both approaches confirmed negligible effect of drag force on the vehicle performance in terms of gas mileage and changes in drag coefficient values. Following these studies, the micro wind turbines were also tested for electricity generation at various cruising speeds of the car ranging from 50 to 80 mph on the freeways. The voltage and power generated always showed an increasing trend with increasing the car speed, however they saturated when a cut off limit was setup with the voltage controllers. A maximum voltage of 3.5 V and a maximum current of 0.8 A were generated by each micro wind turbine when a cut off limit was used along with a load consisting of four LED bulbs in parallel with 3.5 V and 0.2 A rating each. On the other hand, when the tests were repeated without using the cut-off limit, a maximum voltage of 18.91 V and a maximum current of 0.65 A were recorded with a load of six flash bulbs in series (flash bulb rating ? 4.8 V and 0.5 A each). These studies clearly demonstrate the flexibility to vary the voltage and current outputs from the micro wind turbines indicating a possibility for utilizing the wind energy on the cars at high speeds.Article History: Received Sept 5th 2016; Received in revised form Dec 6th 2016 ; Accepted January 4th 2017; Available onlineHow to Cite This Article: Bangi, V.K.T., Chaudhary, Y., Guduru, R.K., Aung, K.T and Reddy, G.N. (2017) Preliminary investigation on generation of electricity using micro wind turbines placed on a car. Int. Journal of Renewable Energy Development, 6(1), 75-81.http://dx.doi.org/10.14710/ijred.6.1.75-81
APPLICATION OF HYDROTHERMAL TREATMENT TO HIGH CONCENTRATED SEWAGE SLUDGE FOR ANAEROBIC DIGESTION PROCESS Orikawa, M.; Kamahara, H.; Atsuta, Y.; Daimon, H.
International Journal of Renewable Energy Development Vol 2, No 3 (2013): October 2013
Publisher : Center of Biomass & Renewable Energy, Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (689.244 KB) | DOI: 10.14710/ijred.2.3.165-168

Abstract

Tomato and seaweed were produced by utilizing CO2 and heat discharged from power generation using biogas in Toyogawa biomass park, Japan. The biogas was obtained by anaerobic digestion with hydrothermal treatment. The hydrothermal treatment was applied to the high concentrated sewage sludge (22 % total solids (TS) dewatered sludge). The purpose of this study is to clarify the effect of hydrothermal treatment on the qualities of high concentrated sewage sludge, by analyzing particulate organic carbon (POC) and dissolved organic carbon (DOC). The hydrothermal treatment was investigated under 10-60 min of treatment time, 180-200 °C of temperature, 10-22 %-TS of sewage sludge concentration. The results showed that the DOC in each conditions increased through hydrothermal treatment. The highest DOC obtained was 67 % of total carbon concentration, when the temperature was 180 °C, treatment time was 60 min and sewage sludge concentration was 10 %-TS. Furthermore, the viscosity of treated sewage sludge was decreased by hydrothermal treatment. In batch anaerobic digestion test, methane gas production was confirmed. In addition, this study evaluated the energy balance of this system. Thus, the results of this study indicated that the possibility of application of hydrothermal treatment to high concentrated sewage sludge for anaerobic digestion process. Keywords: anaerobic reaction, hydrothermal treatment, sewage sludge, solubilization
MULTI-FEEDSTOCKS BIODIESEL PRODUCTION FROM ESTERIFICATION OF CALOPHYLLUM INOPHYLLUM OIL, CASTOR OIL, PALM OIL AND WASTE COOKING OIL Hadiyanto, H; Aini, Apsari Puspita; Widayat, Widayat; Kusmiyati, Kusmiyati; Budiman, Arief; Roesyadi, Achmad
International Journal of Renewable Energy Development Vol 9, No 1 (2020): February 2020
Publisher : Center of Biomass & Renewable Energy, Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (370.154 KB) | DOI: 10.14710/ijred.9.1.119-123

Abstract

Biodiesel can be produced from various vegetable oils and animal fat. Abundant sources of vegetable oil in Indonesia, such as Calophyllum inophyllum, Ricinus communis, palm oil, and waste cooking oil, were used as raw materials. Multi-feedstock biodiesel was used to increase the flexibility operation of biodiesel production. This study was conducted to determine the effect of a combination of vegetable oils on biodiesel characteristics. Degumming and two steps of esterification were applied for high free fatty acid feedstock before trans-esterification in combination with other vegetable oils. Potassium hydroxide was used as a homogenous catalyst and methanol as another raw material. The acid value of C. inophyllum decreased from 54 mg KOH/gr oil to 2.15 mg KOH/gr oil after two steps of esterification. Biodiesel yield from multi-feedstock was 87.926% with a methanol-to-oil molar ratio of 6:1, temperature of 60 ?, and catalyst of 1%wt. ©2020. CBIORE-IJRED. All rights reserved
THE USE OF ODD AND EVEN CLASS WIND SPEED TIME SERIES OF DISTRIBUTION HISTOGRAM TO ESTIMATE WEIBULL PARAMETERS Salami, Adekunlé Akim; Ajavon, Ayité Sénah Akoda; Kodjo, Mawugno Koffi; Ouedraogo, Seydou; Bédja, Koffi-Sa
International Journal of Renewable Energy Development Vol 7, No 2 (2018): July 2018
Publisher : Center of Biomass & Renewable Energy, Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1703.27 KB) | DOI: 10.14710/ijred.7.2.139-150

Abstract

In this article, we introduced a new approach based on graphical method (GPM), maximum likelihood method (MLM), energy pattern factor method (EPFM), empirical method of Justus (EMJ), empirical method of Lysen (EML) and moment method (MOM) using the even or odd classes of wind speed series distribution histogram with 1 m/s as bin size to estimate the Weibull parameters. This new approach is compared on the basis of the resulting mean wind speed and its standard deviation using seven reliable statistical indicators (RPE, RMSE, MAPE, MABE, R2, RRMSE and IA). The results indicate that this new approach is adequate to estimate Weibull parameters and can outperform GPM, MLM, EPF, EMJ, EML and MOM which uses all wind speed time series data collected for one period. The study has also found a linear relationship between the Weibull parameters K and C estimated by MLM, EPFM, EMJ, EML and MOM using odd or even class wind speed time series and those obtained by applying these methods to all class (both even and odd bins) wind speed time series. Another interesting feature of this approach is the data size reduction which eventually leads to a reduced processing time.Article History: Received February 16th 2018; Received in revised form May 5th 2018; Accepted May 27th 2018; Available onlineHow to Cite This Article: Salami, A.A., Ajavon, A.S.A., Kodjo, M.K. , Ouedraogo, S. and Bédja, K. (2018) The Use of Odd and Even Class Wind Speed Time Series of Distribution Histogram to Estimate Weibull Parameters. Int. Journal of Renewable Energy Development 7(2), 139-150.https://doi.org/10.14710/ijred.7.2.139-150
BIOGAS PRODUCTION IN DAIRY FARMING IN INDONESIA: A CHALLENGE FOR SUSTAINABILITY Wahyudi, Jatmiko; Achmad Kurnani, Tb. Benito; Clancy, Joy
International Journal of Renewable Energy Development Vol 4, No 3 (2015): October 2015
Publisher : Center of Biomass & Renewable Energy, Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1034.925 KB) | DOI: 10.14710/ijred.4.3.219-226

Abstract

Biogas plays an important role in supporting and ensuring the dairy farming sector remains sustainable. Biogas technology is not only as a method to dispose dairy farming waste but also benefiting economically, socially and environmentally. Biogas technology has been introduced since 1970s and many biogas programmes have been implemented in Indonesia. However compare to other countries like China and India, the dissemination of biogas technology in Indonesia runs quite slowly. There are several factors such as financial, policies and people?s perception hindering biogas use regarding the increase of biogas plants installed in Indonesia. In addition, many installed biogas plants are non-functional due to inadequate maintenance causing users stop to operate biogas plants and influencing potential users to reject adopting the technology. This paper provides an overview of biogas production sustainability which consists of five sustainability dimensions: technical, economic, social, environmental and organizational/institutional sustainability. Understanding the biogas sustainability helps stakeholders to realize that in order to promote biogas technology many sectors must be developed and many institutions must be involved and cooperated. The sustainability of biogas will determine the success of biogas dissemination particularly in dairy farming in the future. 
COMPARATIVE ANALYSIS BETWEEN PYROLYSIS PRODUCTS OF SPIRULINA PLATENSIS BIOMASS AND ITS RESIDUES Jamilatun, Siti; Budhijanto, B.; Rochmadi, R.; Yuliestyan, Avido; Hadiyanto, H.; Budiman, Arief
International Journal of Renewable Energy Development Vol 8, No 2 (2019): July 2019
Publisher : Center of Biomass & Renewable Energy, Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (800.155 KB) | DOI: 10.14710/ijred.8.2.133-140

Abstract

Today?s needs of energy are yet globally dominated by fossil energy sources, causing the depletion of non-renewable energy. Alternatively, a potential substitute is the energy of biomass. Spirulina platensis (SP) is a microalgae biomass which, if extracted, will produce solid waste called Spirulina platensis residue (SPR). This research explores the pyrolysis product, produced within the range of 300 ? 600 ºC, from the pyrolysis of SP and SPR using fixed bed reactors. The influence of temperature on pyrolysis product?s yield and characteristics are investigated by using mass balance method and gas chromatography ? mass spectrometry (GC-MS) technique, respectively. The results from mass balance method present an optimum pyrolysis temperature of 550 ºC to obtain the desired liquid product of bio-oil, presenting the percentage of 34.59 wt.% for SP and 33.44 wt.% for SPR case. Additionally, with the increasing temperature, the char yield decreases for about 30 wt.% and the yield of gas seems to sharp increase from 550 to 600 ºC. These tendencies are both applied for SP and SPR source pyrolysis product. Interestingly, the benefit use as fossil fuel substitute might be derived, thanks to high HHV at the bio-oil product (32.04 MJ/kg for SP and 25.70 MJ/kg for SPR) and also at the char product with of 18.85-26.12 MJ/kg for both cases. The additional benefit come from the high content of C in its char product (50.31 wt.% for SPR and 45.26 wt.% for SP) that might be able to be used as an adsorbent, soil softener or other uses in the pharmaceutical field. ©2019. CBIORE-IJRED. All rights reserved

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