scholarly journals Optimalisasi Sistem Mikrogrid Hibrida Berbasis Jarak Pagar menggunakan HOMER

2019 ◽  
Vol 7 (2) ◽  
pp. 268
Author(s):  
IBRAHIM IBRAHIM ◽  
DANI RUSIRAWAN
Keyword(s):  
Vegetable Oil ◽  
Natural Resource ◽  
Secondary Data ◽  
Diesel Oil ◽  
Optimal Conditions ◽  
Diesel Generator ◽  
Hybrid Microgrid ◽  
Straight Vegetable Oil ◽  
Cost Of Energy ◽  
Synthetic Gas

ABSTRAKPenggunaan genset diesel minyak solar untuk kelistrikan di pulau Medang terkendala dengan mahal dan tingginya biaya pengadaan minyak solar. Biomassa jarak pagar yang ada di pulau Medang potensial untuk dimanfaatkan sebagai sumber daya alam (SDA) lokal, untuk menggantikan minyak solar sebagai bahan bakar genset. Bahan bakar yang dapat dihasilkan dari buah jarak pagar terdiri dari straight vegetable oil (SVO), biogas dan synthetic gas (syngas). Berdasarkan data sekunder, 1 ha kebun jarak pagar dapat menghasilkan listrik 19.425 kWh/tahun menggunakan genset diesel berbahan bakar SVO ditambah 6.475 kWh/tahun menggunakan genset biogas. Dalam penelitian ini, optimalisasi sistem mikrogrid hibrida berbasis jarak pagar sudah dilakukan. Kondisi optimal untuk beban rata-rata 4.000 kWh/hari terdiri dari 1X360 kW genset SVO + 1X360 kW genset Biogas + Baterai 300 kWh + inverter-rectifier 300 kW. Hasil evaluasi memperlihatkan untuk operasi 25 tahun, sistem mikrogrid hibrida berbasis biomassa jarak pagar membutuhkan net present cost (NPC) sebesar $7.750.000 dan memberikan cost of energy (COE) $0,368/kWh.Kata kunci: genset, bioenergi, SVO, biogas, listrik ABSTRACTUtilization of diesel oil for diesel generators in the Medang island is constrained by high costs of diesel oil. The jatropha (type of biomass) in the Medang island can be used as a local natural resource (SDA), in substituting of diesel oil as a generator fuel. The type of fuel whics is produced by jatropha consist of straight vegatable oil (SVO), biogas and synthetic gas (syngas). Based on secondary data, it is found that 1 ha of Jatropha equal by produces electricity 19.425 kWh/year using an SVO diesel generator set and 6.475 kWh/year using biogas generator set. In this study, optimization of the hybrid microgrid system was carried out. The optimal conditions for an average 4,000 kWh/day of load is consisting of 1X360 kW SVO generator + 1X360 kW Biogas generator + 300 kWh + 300 kW rectifier inverter. Evaluation results showed that for 25-year operation, the hybrid microgrid jatophra bases system requires of NPC of $ 7,750,000 and yield the COE of $ 0.368/kWh.Keywords: genset, bioenergy, SVO, biogas, electricity

scholarly journals Optimal Sizing and Assessment of a Renewable Rich Standalone Hybrid Microgrid Considering Conventional Dispatch Methodologies

2021 ◽  
Vol 13 (22) ◽  
pp. 12734
Author(s):  
Md. Fatin Ishraque ◽  
Sk. A. Shezan ◽  
Md. Sohel Rana ◽  
S. M. Muyeen ◽  
Akhlaqur Rahman ◽  
...  
Keyword(s):  
Operating Cost ◽  
Storage Device ◽  
Optimized Design ◽  
Diesel Generator ◽  
Optimal Sizing ◽  
Load Following ◽  
Hybrid Microgrid ◽  
Cost Of Energy ◽  
Voltage Frequency ◽  
Superior Approach

This paper presents an evaluation of the optimized design of an off-grid hybrid microgrid for alternative load dispatch algorithms with the determination of the most optimal sizing of each equipment, analyzing the voltage and frequency outputs and various costs of the proposed microgrids. Kushighat and Rajendro Bazar, two geographical locations in Bangladesh have been taken as test sites. The proposed microgrids incorporating diesel generator, renewable resources, storage device, and 23.31 kW of demand have been optimized for five conventional load dispatch methodologies: HOMER predictive dispatch, Load Following, Generator Order, Cycle Charging, and Combined Dispatch to reduce the system’s net present cost, gas discharge and cost of energy. HOMER (Hybrid Optimization of Multiple Electric Renewables) software has been used for the analysis to determine the optimal sizes and costing and the voltage-frequency performances of the microgrids are analyzed using MATLAB/Simulink. From our analysis, load following is determined as the superior approach with a minimum operating cost of 3738 USD, net present cost of 152,023 USD, CO2 discharge of 3375 kg/year and cost of energy of 0.208 USD /kWh along with a steady voltage-frequency output. Combined dispatch is determined as the worst strategy for the proposed microgrids with the highest energy cost of 0.532 USD /kWh, the operational cost of 15,394 USD, net present cost of 415,030 USD, and high CO2 discharge. At the end of this work, a comparative analysis between the proposed design, another hybrid, and traditional generation plant is also presented. The findings of this work will be appropriate for any location with an identical demand profile and meteorological estate.

A Study on Reasonable Ratios of Vegetable Oils and Diesel Oil in Mixed Fuel Used as an Alternative Fuel for Marine Diesel Engines in Vietnam

2019 ◽  
Vol 889 ◽  
pp. 244-253
Author(s):  
The Nam Tran ◽  
Van Uy Dang ◽  
Dai An Nguyen
Keyword(s):  
Diesel Engine ◽  
Vegetable Oil ◽  
Fuel Mixture ◽  
High Viscosity ◽  
Diesel Oil ◽  
Negative Effects ◽  
Injection Process ◽  
Straight Vegetable Oil ◽  
Marine Engines ◽  
Marine Diesel

Vegetable oil is used directly as a fuel, in either modified or unmodified equipment, it is referred to as straight vegetable oil (SVO). SVOs have some advantages in comparison with fossil fuel oils such as: renewability, local availability, lower sulfur content, etc. avoiding the environmental effects caused by sulfuric acid, lower aromatic content and high biodegradability. However, SVOs are also attached to several disadvantages such as: high viscosity, low heating value, high fatty contents, influencing on injection process and causing engine coking if misused. In order to prevent such negative effects of diesel engine fuelled by SVO, one of potential solutions is using blends of SVO with diesel oil (DO). In such case, the reasonable ratio of SVO and diesel oil plays a very important role for normal running condition, but also seems to be challenge to identify. The article shows results of a study on defining the ratio for marine diesel application. It is firstly based on the assessment on the heat release processes inside the diesel engine cylinder upon a specific simulation with different blends of SVO and diesel oil. In comparison with the particular requirements for fuel of marine engines, the preferable percentage of vegetable oil in the fuel mixture is pointed out. And finally, the experiments with fuel system of a typical marine diesel engine, HANSHIN 6LU32, installed at the lab of Vietnam Maritime University in terms of checking real engine’s operation and reducing harmful emissions.

scholarly journals Optimal load dispatch strategies for a hybrid system using renewable energy sources

2021 ◽  
Vol 897 (1) ◽  
pp. 012015
Author(s):  
Ronald Ayala Ramírez ◽  
Javier Tenesaca Chacaguasay ◽  
Juan Lata García
Keyword(s):  
Power Systems ◽  
Renewable Energy Sources ◽  
Optimal Operation ◽  
Diesel Generator ◽  
Hybrid Power Systems ◽  
Software Optimization ◽  
Hybrid Microgrid ◽  
Cost Of Energy ◽  
Optimal Load

Abstract Recently, the idea of hybrid power systems (HES) has attracted interest for the electrification of isolated or energy efficient areas. This document examines the modelling and optimal dimensions of a hybrid microgrid using different dispatch strategies. The sizing of the HES components such as Photovoltaic panels, Batteries, Inverter, a Diesel generator has been optimized by three strategies: (i) load tracking, (ii) cycle load, and (iii) combined dispatch. The location of the case study is in a rural community in Ecuador whose load profile is 17 kW. By utilizing HOMER software, optimization for the HES was achieved with the Combined Dispatch strategy (CD) which presented the minimum levels in the net annual cost (NPC), initial capital, levelized cost of energy (LCOE) of $ 90,073.10, $ 21,208 and $ 0.2016 / kWh, respectively. The conclusions offer a guide to consider the resources and generation combination essential for the optimal operation of an island microgrid with different dispatch scenarios.

scholarly journals Accessibility and Sustainability of Hybrid Energy Systems for a Cement Factory in Oman

2020 ◽  
Vol 13 (1) ◽  
pp. 93
Author(s):  
Wesam H. Beitelmal ◽  
Paul C. Okonkwo ◽  
Fadhil Al Housni ◽  
Wael Alruqi ◽  
Omar Alruwaythi
Keyword(s):  
Functional Limitations ◽  
Energy Systems ◽  
Energy System ◽  
Electricity Production ◽  
Diesel Generator ◽  
Hybrid Energy ◽  
Electric System ◽  
Cement Factory ◽  
Hybrid Energy Systems ◽  
Cost Of Energy

Diesel generators are being used as a source of electricity in different parts of the world. Because of the significant expense in diesels cost and the requirement for a greener domain, such electric generating systems appear not to be efficient and environmentally friendly and should be tended to. This paper explores the attainability of utilizing a sustainable power source based on a cross-breed electric system in the cement factory in Salalah, Oman. The HOMER software that breaks down the system setup was utilized to examine the application and functional limitations of each hybridized plan. The result showed that a renewable-energy (RE)-based system has a lower cost of energy (COE) and net present cost (NPC) compared to diesel generator-based hybrid electric and standalone systems. Although the two pure renewable hybrid energy systems considered in this study displayed evidence of no emissions, lower NPC and COE values are observed in the photovoltaic/battery (PV/B) hybrid energy system compared with photovoltaic/wind turbine/battery (PV/WT/B). The PV/WT/B and PV/B systems have higher electricity production and low NPC and COE values. Moreover, the PV/B has the highest return on investment (ROI) and internal rate of return (IRR), making the system the most economically viable and adjudged to be a better candidate for rural community electrification demands.

scholarly journals An evaluation of the life cycle cost of rapeseed oil as a straight vegetable oil fuel to replace petroleum diesel in agriculture

2011 ◽  
Vol 35 (8) ◽  
pp. 3687-3697 ◽  
Author(s):  
Grau Baquero ◽  
Bernat Esteban ◽  
Jordi-Roger Riba ◽  
Antoni Rius ◽  
Rita Puig
Keyword(s):  
Life Cycle ◽  
Vegetable Oil ◽  
Life Cycle Cost ◽  
Rapeseed Oil ◽  
Straight Vegetable Oil ◽  
Oil Fuel

scholarly journals Bidirectional Power Flow Control in AC/DC Hybrid System under AC and DC Fault Conditions

2019 ◽  
Vol 3 (2) ◽  
Author(s):  
Wai Wai Hnin
Keyword(s):  
Power Flow ◽  
Storage System ◽  
Control Technique ◽  
Diesel Generator ◽  
Dc Microgrid ◽  
Photovoltaic Array ◽  
Hybrid Microgrid ◽  
Dc Bus ◽  
Bidirectional Power Flow ◽  
Ac Microgrid

This paper presents a hybrid AC-DC microgrid to reduce the process of multiple conversions in an individual AC microgrid or DC microgrid. The proposed hybrid microgrid compose of both AC microgrid and DC microgrid connected together by bidirectional interlink converter (BIC). Utility grid, 150kVA diesel generator (DG) and 100kW AC load are connected in AC microgrid. DC microgrid is composed of 100 kW photovoltaic array (PV), 20kW battery energy storage system (BESS) and 20kW DC load. The droop control technique is applied to control the system for power sharing within the sources in AC/DC hybrid microgrid in proportion to the power rating. When the faults occur at AC bus, protection signal applied to breaker for isolating the healthy and faults system. DC faults occur at DC bus, DC breaker isolate the AC and DC bus. The system performance for power flow sharing on hybrid AC-DC microgrid is demonstrated by using MATLAB/SIMULINK.

scholarly journals Government Responsibility in The Management of Natural Resources for The Protection of Economic, Social, and Cultural Rights in The Balaesang Region

2020 ◽  
Vol 1 (1) ◽  
pp. 146-173
Author(s):  
Jeane Neltje Saly ◽  
Journal Manager APHA
Keyword(s):  
Resource Management ◽  
Natural Resources ◽  
Natural Resource Management ◽  
Natural Resource ◽  
Local Governments ◽  
Secondary Data ◽  
Customary Law ◽  
Government Responsibility ◽  
Healthy Environment ◽  
The Government

There are two aims of this paper: first to analyze the responsibility of the government in the commitment to protect the rights of indigenous and tribal peoples in natural resource management activities; secondly, to analyze the implementation of government responsibilities in mining management in relation to the rights of indigenous and tribal peoples in enjoying their rights in the ecosystem, such as the environment. The method used in the research is empirical normative method, namely research that emphasizes the secondary data that is by studying and reviewing the principles of law and positive law principles derived from the existing literature materials in legislation and the provisions especially in relation to the exclusion of indigenous people's rights in the obligation of the state to create a healthy environment for the management of natural resources as a manifestation of human rights protection, and supplemented by empirical data in the form of interviews with related parties in Balaesang Tanjung Donggala District. The results show that natural resource management activities, linked to indigenous and tribal peoples' rights in environmental protection are regulated in various laws, both nationally and internationally. Implementation of government responsibility in mining management is related to the right of customary law community in enjoying the environment has not been optimally done. From the case of Balaesang Tanjung Donggala, it is envisaged that local governments ignore the rights of indigenous and tribal peoples in enjoying a healthy environment.

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