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- Author:
- Supriyasilp, Thanaporn; Pinitjitsamut, Montchai; Pongput, Kobkiat; Wanaset, Apinya; Boonyanupong, Suree; Rakthai, Saksri; Boonyasirikul, Thana
- Source:
- Renewable energy 2017 v.111 pp. 861-869
- ISSN:
- 0960-1481
- Subject:
- guidelines; hydroelectric power; social benefit; tariffs; Thailand
- Abstract:
- ... Thailand implemented a premium-price Feed-in Tariff (FIT), or ‘Adder’ program, in 2006 as an incentive to generate renewable energy. However, the Adder rate for hydropower was very low, and failed to motivate investors. Later, the Thai government decided to change the Adder program to a fixed-price FIT instead. As of 2014, no studies had analysed hydroelectric power rates in Thailand. Therefore, t ...
- DOI:
- 10.1016/j.renene.2017.05.009
-
https://dx.doi.org/10.1016/j.renene.2017.05.009
- Author:
- Salcedo-Sanz, S.; Jiménez-Fernández, S.; Aybar-Ruiz, A.; Casanova-Mateo, C.; Sanz-Justo, J.; García-Herrera, R.
- Source:
- Renewable energy 2017 v.111 pp. 63-76
- ISSN:
- 0960-1481
- Subject:
- algorithms; coral reefs; neural networks; prediction; radiometry; renewable energy sources; solar radiation; Spain
- Abstract:
- ... This paper tackles the prediction of the global solar radiation (GSR) at a given point, using as predictive variables the outputs of a numerical weather model (the WRF meso-scale model) obtained at a different grid points. Prediction is obtained in this work using a Multilayer Perceptron (MLP) trained with Extreme Learning Machines (ELMs). Provided that the number of WRF outputs is vast, we propos ...
- DOI:
- 10.1016/j.renene.2017.03.079
-
https://dx.doi.org/10.1016/j.renene.2017.03.079
- Author:
- Li, Jinyi; Cao, Yang; Wu, Guoqing; Miao, Zifan; Qi, Jiawei
- Source:
- Renewable energy 2017 v.111 pp. 676-687
- ISSN:
- 0960-1481
- Subject:
- aerodynamics; renewable energy sources; wind turbines
- Abstract:
- ... This paper presents a method examining static forces and moment of airfoil in steady solver. Aerodynamic stability is one subject that many scholars have begun to realize very crucial for design and daily operation. Fundamentals of aerodynamics were firstly scrutinized concerned about lift, drag and moment. Then steady simulation solver is set up instead of transient solver because we would like t ...
- DOI:
- 10.1016/j.renene.2017.04.057
-
https://dx.doi.org/10.1016/j.renene.2017.04.057
- Author:
- García-Álvarez, María Teresa; Cabeza-García, Laura; Soares, Isabel
- Source:
- Renewable energy 2017 v.111 pp. 256-264
- ISSN:
- 0960-1481
- Subject:
- European Union; issues and policy; prices; tariffs; wind; wind power
- Abstract:
- ... This paper provides an empirical evaluation of feed-in tariff and renewable portfolio standard policies applied to onshore wind power in the EU-28 over the period 2000–2014. It allows policy-makers to know: a) if these policies have actually increased onshore wind generation capacity compared to a scenario without regulatory supports, b) which policy led to most onshore wind generation capacity, c ...
- DOI:
- 10.1016/j.renene.2017.03.067
-
https://dx.doi.org/10.1016/j.renene.2017.03.067
- Author:
- Allmark, Matthew; Grosvenor, Roger; Prickett, Paul
- Source:
- Renewable energy 2017 v.111 pp. 849-860
- ISSN:
- 0960-1481
- Subject:
- models; monitoring; renewable energy sources; torque; turbines; turbulent flow
- Abstract:
- ... In order to better manage and maintain deployed Tidal Stream Turbine (TST) devices their response to complicated and severe loading mechanisms must be established. To aid this process the research presented details a methodology for mapping TST operational data, taken under a variety of operating conditions, to a set of model parameters. The parameter sets were developed based on a TST rotor torqu ...
- DOI:
- 10.1016/j.renene.2017.05.010
-
https://dx.doi.org/10.1016/j.renene.2017.05.010
- Author:
- Civelek, Zafer; Lüy, Murat; Çam, Ertuğrul; Mamur, Hayati
- Source:
- Renewable energy 2017 v.111 pp. 708-717
- ISSN:
- 0960-1481
- Subject:
- blades; energy; fuzzy logic; renewable energy sources; wind speed; wind turbines
- Abstract:
- ... In the world, efforts to increase the resource diversity in electric generation have accelerated lately. So, the great improvements have been achieved in wind turbines (WTs). The dimensions of WTs have grown for more electric generation and their energy productions have increased. Depending on these developments, it has become more important to reduce the WT load mitigation. Thus, a tendency to pa ...
- DOI:
- 10.1016/j.renene.2017.04.064
-
https://dx.doi.org/10.1016/j.renene.2017.04.064
- Author:
- Zullaikah, Siti; Rahkadima, Yulia T.; Ju, Yi-Hsu
- Source:
- Renewable energy 2017 v.111 pp. 764-770
- ISSN:
- 0960-1481
- Subject:
- biodiesel; carbon dioxide; free fatty acids; hydrolysis; methanol; rice; rice bran; rice bran oil; sugars; transesterification
- Abstract:
- ... A non-catalytic method to produce biodiesel in situ from a rice milling by-product, i.e. rice bran, using subcritical water-methanol mixture has been investigated. The method was found to be unaffected by initial moisture and free fatty acids (FFA) contents in rice bran so that no pretreatment was required. The yield and purity of biodiesel were higher under CO2 atmosphere than those under N2 atmo ...
- DOI:
- 10.1016/j.renene.2017.04.040
-
https://dx.doi.org/10.1016/j.renene.2017.04.040
- Author:
- Wei, Shengnan; Song, Yahui; Rong, Yang; Tang, Liang; Chen, Yang; Lu, Chunxiao; Zhang, Zhaohong; Wang, Jun
- Source:
- Renewable energy 2017 v.111 pp. 628-637
- ISSN:
- 0960-1481
- Subject:
- Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; aqueous solutions; energy-dispersive X-ray analysis; graphene oxide; hydrogen; hydrogen production; irradiation; methanol; photocatalysis; photocatalysts; photoluminescence; renewable energy sources; scanning electron microscopy; sol-gel processing; transmission electron microscopy; ultraviolet-visible spectroscopy
- Abstract:
- ... Here, a high effective visible-ultraviolet up-conversion luminescence agent (Er³⁺:YAlO3) was synthesized and the Er³⁺:YAlO3/Ta2O5 composite was prepared by sol-gel method. The MoSe2-reduced graphene oxide (MoSe2-RGO) hybrid as co-catalyst was prepared by hydrothermal method. Afterwards, a new Z-scheme photocatalyst, Er³⁺:YAlO3/Ta2O5-CaIn2S4/MoSe2-RGO, was successfully assembled by hydrothermal met ...
- DOI:
- 10.1016/j.renene.2017.04.022
-
https://dx.doi.org/10.1016/j.renene.2017.04.022
- Author:
- Müller, Gerald; Chavushoglu, Mert; Kerri, Mark; Tsuzaki, Toru
- Source:
- Renewable energy 2017 v.111 pp. 803-814
- ISSN:
- 0960-1481
- Subject:
- blades; buildings; geometry; models; wind power; wind speed; wind turbines; windmills
- Abstract:
- ... The Persian or Sistan wind mill is possibly the oldest wind energy device. It consists of a vertical axis with six blades, and an outer shroud which encases half the rotor against the wind. The wind only acts on one half of the runner, providing the driving force. The efficiency of this machine was assumed to be between 5 and 14%, too low for practical application today. The concept however is int ...
- DOI:
- 10.1016/j.renene.2017.05.017
-
https://dx.doi.org/10.1016/j.renene.2017.05.017
- Author:
- Tavares, Gilmar Roberto; Massa, Thainara Bovo; Gonçalves, José Eduardo; da Silva, Camila; dos Santos, Wanderley Dantas
- Source:
- Renewable energy 2017 v.111 pp. 659-665
- ISSN:
- 0960-1481
- Subject:
- acetates; biodiesel; catalytic activity; crambe seed oil; experimental design; free fatty acids; hexane; linoleic acid; seeds; solvents; temperature; ultrasonic treatment
- Abstract:
- ... In this study, the effectiveness of the ultrasound-assisted extraction (UAE) of crambe seed oil was evaluated with the aim of biodiesel synthesis by in situ interesterification. An experimental design was applied, using a mixture of n-hexane and methyl acetate as the solvent, to evaluate the effect of the process variables and determine the conditions that maximize the removal of oil from the seed ...
- DOI:
- 10.1016/j.renene.2017.04.065
-
https://dx.doi.org/10.1016/j.renene.2017.04.065
- Author:
- Srikanth, H.V.; Venkatesh, J.; Godiganur, Sharanappa; Venkateswaran, S.; Manne, Bhaskar
- Source:
- Renewable energy 2017 v.111 pp. 168-174
- ISSN:
- 0960-1481
- Subject:
- acid value; biodiesel; crystallization; differential scanning calorimetry; feedstocks; fluid mechanics; industrial wastes; milk; pour point; temperature; viscosity
- Abstract:
- ... There is a growing trend in utilizing biological industrial wastes to produce biofuels. The dairy washed milk scum (DWMS) is one of such potential industrial waste and can be used as feedstock for the production of biodiesel. One of the inherent problems of DWMS biodiesel is its poor low temperature property. In this investigation, the influence of two bio-based cold flow improvers (CFIs) namely, ...
- DOI:
- 10.1016/j.renene.2017.03.092
-
https://dx.doi.org/10.1016/j.renene.2017.03.092
- Author:
- Smullen, Emma; Finnan, John; Dowling, David; Mulcahy, Patricia
- Source:
- Renewable energy 2017 v.111 pp. 638-645
- ISSN:
- 0960-1481
- Subject:
- Panicum virgatum; ammonia; biofuels; biotransformation; cellulose; cost effectiveness; environmental impact; ethanol; ethanol production; feedstocks; fermentation; glucose; markets; methanol; saccharification; sodium hydroxide; sulfuric acid
- Abstract:
- ... Switchgrass (Panicum virgatum L) is considered to be one of the best feedstocks for second generation ethanol production. However, its use as a biofuel resource for the ethanol market is challenged by high investment costs and inconsistent production methodologies. This study explores the use of switchgrass as a potential feedstock for ethanol production, investigating the effects of different pre ...
- DOI:
- 10.1016/j.renene.2017.04.059
-
https://dx.doi.org/10.1016/j.renene.2017.04.059
- Author:
- Jasiūnas, Lukas; Pedersen, Thomas H.; Toor, Saqib S.; Rosendahl, Lasse A.
- Source:
- Renewable energy 2017 v.111 pp. 392-398
- ISSN:
- 0960-1481
- Subject:
- Sphagnum; byproducts; citric acid; feedstocks; horse manure; leaching; liquefaction; mixing; mushroom growing; renewable energy sources; sawdust; spent mushroom compost; straw; wood
- Abstract:
- ... The work investigates a new potential feedstock source for hydrothermal liquefaction (HTL) driven biocrude production. Specifically, the focus is set on utilizing spent mushroom compost (SMC), the primary waste by-product from mushroom farming. It is considered as a feedstock for HTL conversion due to its organic nature (e.g. straw, horse manure and sphagnum) and ample availability with an annual ...
- DOI:
- 10.1016/j.renene.2017.04.019
-
https://dx.doi.org/10.1016/j.renene.2017.04.019
- Author:
- Proskurina, Svetlana; Heinimö, Jussi; Schipfer, Fabian; Vakkilainen, Esa
- Source:
- Renewable energy 2017 v.111 pp. 265-274
- ISSN:
- 0960-1481
- Subject:
- biofuels; biomass; coal; energy; heat production; industrial applications; markets; minerals; power generation; pulp and paper industry; steel; torrefaction
- Abstract:
- ... Torrefied biomass has considerable potential as a biomass fuel to replace coal in energy and process heat production. The aim of this paper is to evaluate the potential of torrefied biomass in different industries, both power and non-power generation industries, and considers the impact of such use on the international biomass market. The power generation sector has been so far the leader in testi ...
- DOI:
- 10.1016/j.renene.2017.04.015
-
https://dx.doi.org/10.1016/j.renene.2017.04.015
- Author:
- Cui, Mingjian; Zhang, Jie; Feng, Cong; Florita, Anthony R.; Sun, Yuanzhang; Hodge, Bri-Mathias
- Source:
- Renewable energy 2017 v.111 pp. 227-244
- ISSN:
- 0960-1481
- Subject:
- algorithms; diurnal variation; economics; solar energy; wind power
- Abstract:
- ... One of the biggest concerns associated with integrating a large amount of renewable energy into the power grid is the ability to handle large ramps in the renewable power output. For the sake of system reliability and economics, it is essential for power system operators to better understand the ramping features of renewables, load, and netload. In this paper, an optimized swinging door algorithm ...
- DOI:
- 10.1016/j.renene.2017.04.005
-
https://dx.doi.org/10.1016/j.renene.2017.04.005
- Author:
- Unrean, Pornkamol; Khajeeram, Sutamat; Champreda, Verawat
- Source:
- Renewable energy 2017 v.111 pp. 295-306
- ISSN:
- 0960-1481
- Subject:
- biofuels; cost effectiveness; fermentation; hydrolysates; lipids; models; oils; process design; screening; sugarcane bagasse; yeasts
- Abstract:
- ... We developed in this study an efficient production process of SCO from sugarcane bagasse hydrolysates using Y. lipolytica. We described a dynamic flux balance model strategy based on a genome-scale metabolic model of Y. lipolytica and SCO fermentation kinetics that applied for rational design of optimized fed-batch process with high single cell oil accumulation. Furthermore, metabolic evolution ap ...
- DOI:
- 10.1016/j.renene.2017.04.018
-
https://dx.doi.org/10.1016/j.renene.2017.04.018
- Author:
- Arnaoutakis, Nektarios; Souliotis, Manolis; Papaefthimiou, Spiros
- Source:
- Renewable energy 2017 v.111 pp. 187-200
- ISSN:
- 0960-1481
- Subject:
- energy; environmental assessment; heat; heaters; life cycle assessment; renewable energy sources; temperature; thermal properties
- Abstract:
- ... This paper presents the comparative study of two commercially available types of solar water heaters for domestic applications: Flat Plate Thermosyphonic Units (FPTU) and Integrated Collector Storage (ICS) solar water heaters. The conducted analysis initially focuses on the experimental investigation of the thermal behaviour and proceeds to the detailed holistic environmental analysis for both sys ...
- DOI:
- 10.1016/j.renene.2017.04.008
-
https://dx.doi.org/10.1016/j.renene.2017.04.008
- Author:
- Van Erdeweghe, Sarah; Van Bael, Johan; Laenen, Ben; D'haeseleer, William
- Source:
- Renewable energy 2017 v.111 pp. 494-505
- ISSN:
- 0960-1481
- Subject:
- electric power; exergy; heat; power plants; renewable energy sources; temperature
- Abstract:
- ... In this paper, the performance of a low-temperature (130 °C) geothermally-fed combined heat-and-power (CHP) plant coupled to third and fourth generation thermal networks is investigated. The series and parallel CHP configurations are compared based on an exergy analysis. Whether the series or the parallel CHP has the best performance depends on the thermal network requirements. The results are dis ...
- DOI:
- 10.1016/j.renene.2017.04.031
-
https://dx.doi.org/10.1016/j.renene.2017.04.031
- Author:
- Büyükakın, Mustafa Kemalettin; Öztuna, Semiha; Demir, Hakan
- Source:
- Renewable energy 2017 v.111 pp. 147-156
- ISSN:
- 0960-1481
- Subject:
- air flow; ceramics; drying; energy conservation; energy costs; heat exchangers; kilns; pollution; solar collectors; solar energy; solar radiation; summer; temperature; thermodynamics
- Abstract:
- ... Nowadays, solar-assisted systems have been identified as one of the best solutions to use in order to save energy in industrial processes. Energy costs and environmental pollution emanating from these proposed systems are unequivocally lower than conventional systems. In this study, a traditional Turkish cini ceramic drying kiln, with a daily capacity of 600 kg, was designed and analysed from a th ...
- DOI:
- 10.1016/j.renene.2017.03.090
-
https://dx.doi.org/10.1016/j.renene.2017.03.090
- Author:
- Cascos, V.; Troncoso, L.; Alonso, J.A.; Fernández-Díaz, M.T.
- Source:
- Renewable energy 2017 v.111 pp. 476-483
- ISSN:
- 0960-1481
- Subject:
- electrical conductivity; fuel cells; X-ray diffraction; renewable energy sources; electrolytes; crystal structure; ambient temperature; fuels; electrochemistry; methane; hydrogen; thermal expansion; oxides; anodes; X-radiation
- Abstract:
- ... We have designed and prepared SrMo1-xGaxO3-δ (x = 0.1 and 0.2) perovskite oxides. Their performance as anode materials in intermediate-temperature solid-oxide fuel cells (IT-SOFC) has been investigated. The characterization of these oxides included X-ray (XRD) and neutron powder diffraction (NPD) for x = 0.1 and 0.2. At room temperature, SrMo1-xGaxO3-δ perovskites are defined in the Pm-3m space gr ...
- DOI:
- 10.1016/j.renene.2017.04.023
-
https://dx.doi.org/10.1016/j.renene.2017.04.023