scholarly journals Hybrid Pumped Hydro Storage Energy Solutions towards Wind and PV Integration: Improvement on Flexibility, Reliability and Energy Costs

Water ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2457 ◽  
Author(s):  
Mariana Simão ◽  
Helena Ramos
Keyword(s):  
Technical Solution ◽  
Renewable Power ◽  
Reservoir Volume ◽  
Multi Criteria Evaluation ◽  
Mathematical Simulations ◽  
Hybrid Solutions ◽  
Integration Improvement ◽  
Pumped Storage ◽  
And Storage ◽  
Energy Autonomy

This study presents a technique based on a multi-criteria evaluation, for a sustainable technical solution based on renewable sources integration. It explores the combined production of hydro, solar and wind, for the best challenge of energy storage flexibility, reliability and sustainability. Mathematical simulations of hybrid solutions are developed together with different operating principles and restrictions. An electrical generating system composed primarily by wind and solar technologies, with pumped-storage hydropower schemes, is defined, predicting how much renewable power and storage capacity should be installed to satisfy renewables-only generation solutions. The three sources were combined considering different pump/turbine (P/T) capacities of 2, 4 and 6 MW, wind and PV solar powers of 4–5 MW and 0.54–1.60 MW, respectively and different reservoir volume capacities. The chosen hybrid hydro-wind and PV solar power solution, with installed capacities of 4, 5 and 0.54 MW, respectively, of integrated pumped storage and a reservoir volume of 378,000 m3, ensures 72% annual consumption satisfaction offering the best technical alternative at the lowest cost, with less return on the investment. The results demonstrate that technically the pumped hydro storage with wind and PV is an ideal solution to achieve energy autonomy and to increase its flexibility and reliability.

Using Free Software for Elastic Web Hosting on a Private Cloud

2012 ◽  
pp. 733-748
Author(s):  
Roland Kübert ◽  
Gregory Katsaros
Keyword(s):  
Cloud Computing ◽  
Real Life ◽  
Free Software ◽  
Technical Solution ◽  
Use Case ◽  
Cloud Infrastructure ◽  
Private Cloud ◽  
Software Applications ◽  
Experimental Laboratory ◽  
And Storage

Even though public cloud providers already exist and offer computing and storage services, cloud computing is still a buzzword for scientists in various fields such as engineering, finance, social sciences, etc. These technologies are currently mature enough to leave the experimental laboratory in order to be used in real-life scenarios. To this end, the authors consider that the prime example use case of cloud computing is a web hosting service. This paper presents the architectural approach as well as the technical solution for applying elastic web hosting onto a private cloud infrastructure using only free software. Through several available software applications and tools, anyone can build their own private cloud on top of a local infrastructure and benefit from the dynamicity and scalability provided by the cloud approach.

Using Free Software for Elastic Web Hosting on a Private Cloud

2013 ◽  
pp. 97-111
Author(s):  
Roland Kübert ◽  
Gregory Katsaros
Keyword(s):  
Cloud Computing ◽  
Real Life ◽  
Free Software ◽  
Technical Solution ◽  
Use Case ◽  
Cloud Infrastructure ◽  
Private Cloud ◽  
Software Applications ◽  
Experimental Laboratory ◽  
And Storage

Even though public cloud providers already exist and offer computing and storage services, cloud computing is still a buzzword for scientists in various fields such as engineering, finance, social sciences, etc. These technologies are currently mature enough to leave the experimental laboratory in order to be used in real-life scenarios. To this end, the authors consider that the prime example use case of cloud computing is a web hosting service. This paper presents the architectural approach as well as the technical solution for applying elastic web hosting onto a private cloud infrastructure using only free software. Through several available software applications and tools, anyone can build their own private cloud on top of a local infrastructure and benefit from the dynamicity and scalability provided by the cloud approach.

Offshore Renewable Power to Hydrogen Provides a New Technical Solution for the Utilization of Offshore CO-Rich Natural Gas

2020 ◽  
Author(s):  
Pengfei Song ◽  
Tongwen Shan ◽  
Jianguo Hou ◽  
Le Chang ◽  
Youwu Li ◽  
...  
Keyword(s):  
Natural Gas ◽  
Technical Solution ◽  
Renewable Power

Reimagining the future of gas

2018 ◽  
Vol 58 (2) ◽  
pp. 565
Author(s):  
Angus Jaffray
Keyword(s):  
New Technologies ◽  
Predictive Analytics ◽  
New Technology ◽  
Market Penetration ◽  
Well Performance ◽  
Improve Energy Efficiency ◽  
Renewable Power ◽  
Reduce Emissions ◽  
And Storage

To meet the twin objectives of limiting climate change and providing affordable energy to a growing and urbanised population, natural gas must adapt its role in a changing energy market and remain competitive with other sources of energy longer term. Santos is ensuring its role in this future by incorporating technology into its existing operations to improve energy efficiency, reduce operating costs and reduce emissions. The declining cost of new technology, historic production data and analytics create opportunities to improve efficiency in existing facilities. As new technologies such as variable renewable power generation increase their market penetration, the role of gas and the opportunities for gas producers are also changing. Santos is investigating several projects that incorporate new technology and leverage these market changes. These projects include: • conversion of existing operations to run partially or fully on renewable power to reduce fuel consumption, reduce emissions from Santos’ operations, improve reliability and make more product available to the market; • using predictive analytics to improve well performance; • using technology to improve logistics performance; and • leveraging Santos’ existing infrastructure footprint to develop commercial-scale gas, renewable and storage hybrid power projects.

scholarly journals A comparative review of artificial muscles for microsystem applications

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Mayue Shi ◽  
Eric M. Yeatman
Keyword(s):  
Artificial Muscle ◽  
System Level ◽  
Soft Robotics ◽  
Artificial Muscles ◽  
Energy Delivery ◽  
Comparative Review ◽  
Muscle Types ◽  
Application Requirements ◽  
And Storage ◽  
Energy Autonomy

AbstractArtificial muscles are capable of generating actuation in microsystems with outstanding compliance. Recent years have witnessed a growing academic interest in artificial muscles and their application in many areas, such as soft robotics and biomedical devices. This paper aims to provide a comparative review of recent advances in artificial muscle based on various operating mechanisms. The advantages and limitations of each operating mechanism are analyzed and compared. According to the unique application requirements and electrical and mechanical properties of the muscle types, we suggest suitable artificial muscle mechanisms for specific microsystem applications. Finally, we discuss potential strategies for energy delivery, conversion, and storage to promote the energy autonomy of microrobotic systems at a system level.

Optimization of Released Water from the Dez Dam for Supply of Water Demands in the Downstream of Dam

2011 ◽  
Vol 147 ◽  
pp. 187-190
Author(s):  
Arash Adib ◽  
Iman Ahmadeanfar ◽  
Meysam Salarijazi ◽  
Mojtaba Labibzadeh ◽  
Mohammad Vaghefi
Keyword(s):  
Normal Condition ◽  
Damage Function ◽  
Agricultural Water ◽  
Reservoir Water ◽  
Reservoir Volume ◽  
Water Demands ◽  
South West ◽  
Drinkable Water ◽  
And Storage ◽  
Better Than

For supplying of water demands in the downstream of dams, optimization of released water from reservoir of dam is necessary. Released water from reservoir is related to discharge of inflow to reservoir, volume of evaporation from reservoir and storage of reservoir. Water demands are includes of drinkable water and agricultural water demand. If released water from reservoir is less than water demands in a month, this month will be a defeat. After a defeat, reservoir must return to normal condition in order to supply of water demands in next months. For minimize the number of defeats and maximize return ability of reservoir to normal condition, a suitable method must be applied for optimization of volume of released water from reservoir. In this research, two optimum methods (SDP method and GA method) were applied for minimize the number of defeats and maximize return ability of reservoir to normal condition. For this purpose, reservoir of the Dez dam was considered in this research. The Dez dam locates in the south-west of Iran on the Dez River. At the end, it is observed that GA method can minimize the number of defeats and maximize return ability of reservoir to normal condition better than SDP method. But SDP method can minimize damage function better than GA method.

scholarly journals Stator Flux-Regulatory Excitation Control in Converter-Fed Synchronous Machines for Pumped-Storage Variable-Speed Hydropower

2021 ◽  
Author(s):  
Jørgen Hagset Stavnesli ◽  
Jonas Kristiansen Nøland
Keyword(s):  
Large Scale ◽  
Optimal Operation ◽  
Hydropower Plant ◽  
Technical Solution ◽  
Saturation Curve ◽  
Variable Speed ◽  
Original Design ◽  
Machine Loading ◽  
Stator Flux ◽  
Pumped Storage

Pumped-storage hydropower is seen as a promising solution for efficient, large-scale energy storage. One competitive technical solution is the variable-speed hydropower plant (VSHP) configured with a converter-fed synchronous machine (CFSM). These machines are operated with one extra degree of freedom that is not usually optimized, where the CFSM's rotor-side DC excitation interacts with the stator-side AC excitation. Depending on machine loading, the CFSM will be utilized in conditions far from its original design. In order to deal with this issue, this paper presents a stator flux control (SFC) method for regulating VSHPs in a more efficient way by adjusting the field current to prevent the machine from operating with over-magnetization independent of loading condition, as well as better utilizing the stator-fed converter current, maximizing the utilization of the CFSM. The derived first-principle analytical equations for the proposed SFC have been validated and analyzed in the Matlab/Simulink environment for a large 45 MVA, 375 rpm CFSM, with the measured saturation curve as input. Finally, dynamic transitions between different levels of pumping power reveal the SFC's ability to help to maintain a unity stator flux in the machine, enabling optimal operation independent of loading level.

Techno-Economic Analysis of a Hydrogen Production and Storage System for the On-Site Fuel Supply of Hydrogen-Fired Gas Turbines

2021 ◽  
Author(s):  
Thomas Bexten ◽  
Tobias Sieker ◽  
Manfred Wirsum
Keyword(s):  
Power Generation ◽  
Hydrogen Production ◽  
Hydrogen Storage ◽  
Gas Turbines ◽  
Design Parameters ◽  
Scale Production ◽  
Fuel Supply ◽  
Renewable Power ◽  
Renewable Power Generation ◽  
And Storage

Abstract Hydrogen-fired gas turbines have the potential to play an important role in future CO2-neutral energy and industry sectors. A prerequisite for the operation of hydrogen-fired gas turbines is the availability of sufficient quantities of hydrogen. The combination of electrolysis and renewable power generation is currently considered the most relevant pathway for the large-scale production of CO2-neutral hydrogen. Regarding the fuel supply of hydrogen-fired gas turbines, this pathway is associated with various technical and economic challenges. This applies in particular to configurations in which electrolyzers and hydrogen storage capacities are installed directly at gas turbine sites to avoid hydrogen transport. Considering an exemplary system configuration, the present study extends prior model-based investigations by focusing on the economic viability of the on-site fuel supply of hydrogen-fired gas turbines. The impact of various design parameters and operational strategies is analyzed using the Levelized Cost of Hydrogen as the main economic indicator. The study reveals that the investigated on-site hydrogen production is not economically viable within the current (2019) framework of the German energy sector. Assuming the extensive availability of renewable power generation in the long-term, additional investigations indicate that on-site hydrogen production and storage systems for gas turbines could potentially become economically viable if various advantageous conditions are met. These conditions include a sufficient availability of inexpensive renewable power for the operation of electrolyzers as well as a sufficient utilization of on-site hydrogen storage capacities to justify corresponding capital expenditures.

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