A Critical Review of Sustainable Energy Policies for the Promotion of Renewable Energy Sources

Lu, Yuehong; Khan, Zafar A.; Alvarez-Alvarado, Manuel S.; Zhang, Yang; Huang, Zhijia; Imran, Muhammad

doi:10.3390/su12125078

Cited by 296 publications

(144 citation statements)

References 86 publications

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“…An additional analysis of subsidies for energy efficiency improvement measures has shown that the elimination of artificial price reductions alone is not enough to achieve long-term energy efficiency goals [35]. In many countries, subsidies for innovative energy performance measures, in particular those using renewable energy, are used to increase the energy efficiency of a building [36]. Other researchers suggest that most appropriate measures are demonstration projects and soft loans for energy efficiency measures [37].…”

Section: Resultsmentioning

confidence: 99%

Optimization of the Thermal Insulation Level of Residential Buildings in the Almaty Region of Kazakhstan

Tukhtamisheva¹,

Adilova²,

Banionis

et al. 2020

Energies

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Kazakhstan is country rich in energy resources, but to raise the living standards of the country’s population, the government regulates prices of heating energy, which are significantly lower comparing to those in the global energy market. Such an approach encourages the construction of residential buildings without concern for their energy efficiency, which significantly increases energy consumption in the sector and leads to the increase of greenhouse gas emissions into the environment. Therefore, the aim of this study was to analyze the impact of regulated low prices of heating energy on long-term energy use in buildings, to determine optimal levels of building thermal insulation at current energy prices and following global energy price trends, and to demonstrate the impact of more efficient building thermal insulation on heating energy consumption from a long-time perspective. The cost-optimal method used in EU countries was chosen for the optimization of building thermal insulation and energy consumption to compare the impact of energy prices on the optimal thermal insulation of buildings. The results of the study showed that maintaining low energy prices hinders the implementation of energy-efficient solutions in buildings and does not provide an economic justification for prolonging the heating season by ensuring the quality of the indoor microclimate. As a practical result of this study, a recommendation was made to introduce optimal thermal insulation requirements in building regulations and to redistribute part of the energy subsidies for implementation of energy-efficient measures in the residential building sector.

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Section: Resultsmentioning

confidence: 99%

Optimization of the Thermal Insulation Level of Residential Buildings in the Almaty Region of Kazakhstan

Tukhtamisheva¹,

Adilova²,

Banionis

et al. 2020

Energies

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“…However, the proposed technique yield stable ROMs and also carry error bounds formula with low frequency-response approximation error. Figs ( 4, 5) of example 1 and Figs (8,9,10,11) of example 2 respectively provide a comparison of ROMs obtained by using existing ( [49], [51], [52], [53]) and the proposed approach with the original system for the frequency response Bode plot (magnitude, [54] and Proposed Technique WZ's Technique [54] Proposed Technique…”

Section: Analysis and Discussionmentioning

confidence: 99%

“…In this section, numerical examples of the DFIG based variable-speed wind turbine (double-cage induction generator) for the power system (induction model, current model) based on the multi-input multi-output discrete-time are given to show the comparison of the proposed technique with the existing frequency-limited model reduction technique for the LTI continuous-time system. Figs (4,5,6,7,8,9,10,11,12,13) represent the Bode plot (magnitde, phase) comparison of corresponding ROMs obtained by existing ( [51], [52], [53], [54], [55], [56]) and the proposed approache with the original system, each Fig contains subfigures which represent output/input Bode plot (magnitude, phase). Table . 5 and 6 provide frequency response error comparison existing ( [51], [52], [53], [54], [55], [56]) and the proposed approaches.…”

Section: Numerical Examplesmentioning

confidence: 99%

Frequency Limited & Weighted Model Reduction Algorithm With Error Bound: Application to Discrete-Time Doubly Fed Induction Generator Based Wind Turbines for Power System

et al. 2021

Self Cite

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The state-space representations grant a convenient, compact, and elegant way to examine the physical systems, e.g., induction and synchronous generator-based wind turbines, with facts readily available for stability, controllability, and observability analysis. In this paper, the model order reduction of a stable doubly fed induction generator based variable-speed wind turbines model is performed with the aid of the proposed stability preserving balanced realization algorithm based on discrete frequency weights and limited frequency-interval. The frequency weighting and limited frequency-intervals-based model order reduction techniques presented by Enns's and Wang & Zilouchian produce an unstable reduced-order model at certain frequency weights and frequency intervals, respectively. To overcome this main drawback, many researchers provided a solution to preserve the stability of the reduced-order model. However, these existing approaches also produce an unstable reduced-order model in some conditions and produce a large variation to the original system; consequently, they provide a large approximation error. The proposed approach not only ensures the stability of the reduced-order model but also provides low approximation error as compared with other existing approaches and also provides an easily calculable a priori error bound formula. The proposed work produces steady and precise outcomes in contrast to conventional reduction methods, which shows the efficacy of the proposed algorithm.

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“…Some countries that have mastered nuclear power generation technology (such as France, the United States, China, etc.) view the active promotion of nuclear energy construction as an important energy construction policy [ 2 ]. In total, 31 countries operate 417 nuclear reactors and the total operating capacity has reached 370 GW, which is a new historic maximum [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

Fatigue Reliability Analysis Method of Reactor Structure Considering Cumulative Effect of Irradiation

et al. 2021

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The influence of irradiation should be considered in fatigue reliability analyses of reactor structures under irradiation conditions. In this study, the effects of irradiation hardening and irradiation embrittlement on fatigue performance parameters were quantified and a fatigue life prediction model was developed. Based on this model, which takes into account the cumulative effect of a neutron dose, the total fatigue damage was calculated according to Miner’s linear cumulative damage law, and the reliability analysis was carried out using the Monte Carlo simulation method. The case results show that the fatigue life acquired by taking into account the cumulative effect of irradiation was reduced by 24.3% compared with that acquired without considering the irradiation effect. Irradiation led to the increase of the fatigue life at low strains and its decrease at high strains, which is in accordance with the findings of an irradiation fatigue test. The rate of increase in the fatigue life decreased gradually with the increase of the neutron dose. The irradiation performance parameters had a small influence on fatigue reliability, while the fatigue strength coefficient and the elastic modulus had a great influence on the fatigue reliability. Compared with the current method, which uses a high safety factor to determine design parameters, a fatigue reliability analysis method taking into account the cumulative effect of irradiation could be more accurate in the reliability analysis and life prediction of reactor structures.

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A Critical Review of Sustainable Energy Policies for the Promotion of Renewable Energy Sources

Cited by 296 publications

References 86 publications

Optimization of the Thermal Insulation Level of Residential Buildings in the Almaty Region of Kazakhstan

Optimization of the Thermal Insulation Level of Residential Buildings in the Almaty Region of Kazakhstan

Frequency Limited & Weighted Model Reduction Algorithm With Error Bound: Application to Discrete-Time Doubly Fed Induction Generator Based Wind Turbines for Power System

Fatigue Reliability Analysis Method of Reactor Structure Considering Cumulative Effect of Irradiation

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