Integrating wind, photovoltaic, and large hydropower during the reservoir refilling period

Patiño‐Echeverri, Dalia; Virgüez, Edgar; Kern, Jordan; Chen, Lihua; Mei, Yadong; Wang, Hao

doi:10.1016/j.enconman.2019.111778

Cited by 32 publications

(12 citation statements)

References 39 publications

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“…Triboelectric nanogenerators (TENGs) have been recognized as promising green energy-harvesting techniques in the 21st century . Compared with traditional green energy generation techniques, such as wind generation, hydroelectric generation, and photovoltaic generation, which usually require large facilities and plants, , TENGs have the unique advantages of simple device design, high output performance, extreme durability, low fabrication cost, and, most importantly, the ability to harvest ubiquitous mechanical energies in human daily life. − After first being proposed by Wang, TENGs have undergone immense development in recent years . They have shown the capability to generate electrical energy from various vast mechanical motions including wind and wave and micromotions such as body motion, human fatigue, and respiration .…”

Section: Introductionmentioning

confidence: 99%

Enhancing the Performance of Fabric-Based Triboelectric Nanogenerators by Structural and Chemical Modification

Feng

Xia

Sun

et al. 2021

ACS Appl. Mater. Interfaces

107

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Fabric-based triboelectric nanogenerators (TENGs) are promising candidates as wearable energy-harvesting devices and self-powered sensors. Booting the power generation performance is an eternal pursuit for TENGs. Herein, an efficient approach was proposed to enhance the triboelectric performance of commercial velvet fabric by enriching the fiber surface with hierarchical structures and amide bonds through chemical grafting of carbon nanotube (CNT) and poly(ethylenimine) (PEI) via a polyamidation reaction. With an optimized modifier concentration, the fabric-based TENG easily achieved over 10 times improvement in output voltage and current at a low modifier content of less than 1 wt %. The modified-fabric-based TENG was fully washable and exhibited excellent robustness and long-term stability. With a maximum power density of 3.2 W/m2 achieved on a 5 × 106 Ω external resistor, the TENG was able to serve as a power source for various small electronics such as pedometer, digital watch, calculator, and digital timer. In addition, the TENG demonstrated capability in self-powered tactile and pressure sensing and promising potential in human–computer interface applications. The approach proposed provides a feasible path for boosting the triboelectric performance of fabric-based TENGs and gives insights into the design of fabric-based nanogenerators and smart textiles.

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Section: Introductionmentioning

confidence: 99%

Enhancing the Performance of Fabric-Based Triboelectric Nanogenerators by Structural and Chemical Modification

Feng

Xia

Sun

et al. 2021

ACS Appl. Mater. Interfaces

107

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“…The types of objective functions in the optimization model of water-PV complementary systems mainly include maximizing power generation output and benefit, minimizing output fluctuation, and improving energy efficiency. The generation output type models include maximizing the generation capacity of the complementary system and PV output (Wang et al, 2018;Wang et al, 2019b). On the other hand, (Ming et al, 2019), proposed an energy-efficient model by maximizing hydropower storage or minimizing the abandoned power.…”

Section: Introductionmentioning

confidence: 99%

Enhanced bi-layer scheduling strategies for the cascade hydropower-photovoltaic complementary system using a novel meta-heuristic algorithm

Shen,

Wen,

Wang

et al. 2024

Front. Energy Res.

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Improving energy efficiency is crucial for China’s power industry to meet global energy conservation and emission reduction goals. The rapid development of photovoltaic (PV) and hydropower has greatly assisted in the construction of China’s novel power system. The stochastic characteristics of PV power generation pose significant challenges to the reliable and economical scheduling of power systems. In fact, the cascade hydropower station can effectively address the issue. To fully utilize the advantages of hydropower, this paper proposes a bi-layer scheduling optimization model for the cascade hydro-PV complementary system considering power market. The upper-layer model simultaneously maximizes the benefit and minimizes the output volatility of the complementary system. The lower-layer model carries out market clearing with the objective of social cost. Besides, PV uncertainty and market price volatility are considered in the decision-making process for power market transactions. To solve the bi-layer model, a novel meta-heuristic algorithm (geometric mean optimizer) is applied, demonstrating excellent performance compared to similar methods. For the complementary system, the results show that its total power output can be improved, and its output volatility can be effectively alleviated.

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“…The relative contributions of wind and solar to the total of all renewables reached 9% in 2020, doubling in value from 2015, with biomass and other renewables contributing the remaining 31% (IEA, 2020a). With strategic reservoir operation, hydropower provides a stable baseload of energy supply, which complements the intermittency of solar and wind (Jurasz et al, 2018; Wang et al, 2019). Opportunities to efficiently combine hydropower with other sources of renewable energy are abundant.…”

Section: Introductionmentioning

confidence: 99%

Climate change and the hydropower sector: A global review

Wasti

Ray

et al. 2022

WIREs Climate Change

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Renewable sources of electricity, such as solar and wind, need to be paired with sources of reliable baseload. Hydropower is a renewable, low‐emission source of electricity baseload available throughout much of the world as an alternative to electricity conventionally provided by thermal combustion of fossil fuels; however, the global hydropower sector as it stands relies upon surface water flows of substantial and predictable volume. This makes it vulnerable to climate change. The impact of climate change on the hydropower sector is difficult to predict, and not globally uniform. It might be positive, negative, or inconsequential depending upon the local timing and magnitude of changes, reservoir size, allocation priority, and the energy market. The secondary effects of climate change on glacier lake outbursts floods, landslides, and sediment load are poorly understood. In addition, when planning hydropower projects for the future, attention must be given to the greenhouse gas contribution of the impounded waters behind storage dams, and the impact of dams on water temperature. In the past decade, sovereign nations and international development agencies worldwide have evaluated the potential of hydropower as a cost‐effective, clean, sustainable option for baseload electricity supply. There is therefore a crucial need to assess the opportunities and risks hydropower poses across a wide range of potential future climate conditions. This review paper conducts a global survey of the literature on the effect of climate change on hydropower and identifies room for improvement in current approaches to evaluation of the net benefits of hydropower projects under climate change. This article is categorized under: Vulnerability and Adaptation to Climate Change > Learning from Cases and Analogies Assessing Impacts of Climate Change > Evaluating Future Impacts of Climate Change

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Integrating wind, photovoltaic, and large hydropower during the reservoir refilling period

Cited by 32 publications

References 39 publications

Enhancing the Performance of Fabric-Based Triboelectric Nanogenerators by Structural and Chemical Modification

Enhancing the Performance of Fabric-Based Triboelectric Nanogenerators by Structural and Chemical Modification

Enhanced bi-layer scheduling strategies for the cascade hydropower-photovoltaic complementary system using a novel meta-heuristic algorithm

Climate change and the hydropower sector: A global review

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