scholarly journals Alternative and sustainable heat production for drinking water needs in a subarctic climate (Nunavik, Canada): Borehole thermal energy storage to reduce fossil fuel dependency in off-grid communities

2019 ◽  
Vol 252 ◽  
pp. 113463 ◽  
Author(s):  
Nicolò Giordano ◽  
Jasmin Raymond
Keyword(s):  
Drinking Water ◽  
Energy Storage ◽  
Thermal Energy ◽  
Heat Production ◽  
Thermal Energy Storage ◽  
Fossil Fuel ◽  
Subarctic Climate

scholarly journals Design and Integration of High Temperature Latent Heat Thermal Energy Storage for High Power Levels

2018 ◽  
Author(s):  
Maike Johnson ◽  
Bernd Hachmann ◽  
Andreas J. Dengel ◽  
Michael Fiß ◽  
Matthias Hempel ◽  
...  
Keyword(s):  
Energy Storage ◽  
Latent Heat ◽  
Thermal Energy ◽  
High Power ◽  
Thermal Energy Storage ◽  
Fossil Fuel ◽  
Thermal Power ◽  
Fuel Use ◽  
Storage Unit ◽  
Detailed Design

A latent heat thermal energy storage unit is being integrated into a heat- and power cogeneration plant in Saarland, Germany. This storage unit system will act as an intermediate backup to a heat recovery steam generator and gas turbine and is therefore situated in parallel to this unit, also between the feedwater pumps and the steam main. The steam required is superheated, with a nominal thermal power of 6 MW. The storage unit needs to provide steam for at least 15 minutes, resulting in a minimum capacity of 1.5 MWh. Integration of this storage unit will increase efficiency and decrease fossil fuel use by reducing the use of a conventional backup boiler, while maintaining the steam supply to the customer. The detailed design and a partial build of the storage unit has to-date been successfully concluded, as well as system design and build. Hot and cold commissioning of the storage unit, including filling of the storage unit, will commence following the completion of the storage unit. With the integration of this storage unit, fossil fuel use will be reduced in this power plant. Additionally, the production of superheated steam at a high power level in a latent heat storage unit and a comparison with simulation tools will be possible. This project includes the design, build, commissioning and testing of the storage unit. The paper discusses the detailed design of the storage and system, including the simulations of the system integration.

scholarly journals An Integrated Approach to Water-Energy Nexus in Shale-Gas Production

2018 ◽  
Author(s):  
Fadhil Y. Al-Aboosi ◽  
Mahmoud M. El-Halwagi
Keyword(s):  
Energy Storage ◽  
Solar Energy ◽  
Fresh Water ◽  
Thermal Energy ◽  
Shale Gas ◽  
Thermal Energy Storage ◽  
Fossil Fuel ◽  
Gas Production ◽  
Mixed Integer ◽  
Energy Sources

Shale gas production is associated with significant usage of fresh water and discharge of wastewater. Consequently, there is a necessity to create the proper management strategies for water resources in shale gas production and to integrate conventional energy sources (e.g., shale gas) with renewables (e.g., solar energy). The objective of this study is to develop a design framework for integrating water and energy systems including multiple energy sources, cogeneration process, and desalination technologies in treating wastewater and providing fresh water for shale gas production. Solar energy is included to provide thermal power directly to a multi-effect distillation plant (MED) exclusively (to be more feasible economically) or indirect supply through a thermal energy storage system. Thus, MED is driven by direct or indirect solar energy, and excess or direct cogeneration process heat. The proposed thermal energy storage along with the fossil fuel boiler will allow for the dual-purpose system to operate at steady-state by managing the dynamic variability of solar energy. Additionally, electric production is considered to supply a reverse osmosis plant (RO) without connecting to the local electric grid. A multi-period mixed integer nonlinear program (MINLP) is developed and applied to discretize operation period to track the diurnal fluctuations of solar energy. The solution of the optimization program determines the optimal mix of solar energy, thermal storage, and fossil fuel to attain the maximum annual profit of the entire system. A case study is solved for water treatment and energy management for Eagle Ford Basin in Texas.

Economic Analysis of an Electric Thermal Energy Storage System Using Solid Particles for Grid Electricity Storage

2021 ◽  
Author(s):  
Zhiwen Ma ◽  
Xingchao Wang ◽  
Patrick Davenport ◽  
Jeffrey Gifford ◽  
Janna Martinek
Keyword(s):  
Energy Storage ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Power Plants ◽  
Fossil Fuel ◽  
Peak Load ◽  
Combined Cycle ◽  
Solid Particles ◽  
Renewable Power ◽  
And Performance

Abstract As renewable power generation becomes the mainstream new-built energy source, energy storage will become an indispensable need to complement the uncertainty of renewable resources to firm the power supply. When phasing out fossil-fuel power plants to meet the carbon neutral utility target in the midcentury around the world, large capacity of energy storage will be needed to provide reliable grid power. The renewable power integration with storage can support future carbon-free utility and has several significant impacts including increasing the value of renewable generation to the grid, improving the peak-load response, and balancing the electricity supply and demand. Long-duration energy storage (10–100 hours duration) can potentially complement the reduction of fossil-fuel baseload generation that otherwise would risk grid security when a large portion of grid power comes from variable renewable sources. Current energy storage methods based on pumped storage hydropower or batteries have many limitations. Thermal energy storage (TES) has unique advantages in scale and siting flexibility to provide grid-scale storage capacity. A particle-based TES system has promising cost and performance for the future growing energy storage needs. This paper introduces the system and components required for the particle TES to be technically and economically competitive. A technoeconomic analysis based on preliminary component designs and performance shows that the particle TES integrated with an efficient air-Brayton combined cycle power system can provide power for several days by low-cost, high-performance storage cycles. It addresses grid storage needs by enabling large-scale grid integration of intermittent renewables like wind and solar, thereby increasing their grid value. The design specifications and cost estimations of major components in a commercial scale system are presented in this paper. The cost model provides insights for further development and cost comparison with competing technologies.

Effects of aquifer thermal energy storage on groundwater quality and the consequences for drinking water production: a case study from the Netherlands

2011 ◽  
Vol 63 (9) ◽  
pp. 1922-1931 ◽  
Author(s):  
M. Bonte ◽  
P. J. Stuyfzand ◽  
G. A. van den Berg ◽  
W. A. M. Hijnen
Keyword(s):  
Drinking Water ◽  
Energy Storage ◽  
Water Treatment ◽  
Groundwater Quality ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Energy Requirements ◽  
Water Production ◽  
Well Field ◽  
Drinking Water Production

We used data from an aquifer thermal energy storage (ATES) system located 570 m from a public water supply well field in the south of the Netherlands to investigate the relation between production of renewable energy with an ATES system and the production of drinking water. The data show that the groundwater circulation by the ATES system can impact chemical groundwater quality by introducing shallow groundwater with a different chemical composition at greater depth. However, the observed concentration changes are sufficiently small to keep groundwater suitable for drinking water production. Microbiological results showed that the ATES system introduced faecal bacteria in the groundwater and stimulated the growth of heterotrophic micro-organisms. At the studied site this forms no hygienic risk because of the long distance between the ATES wells and the public supply well field A further degradation of either chemical or microbiological groundwater quality however may necessitate additional water treatment which raises the energy requirements. The additional energy requirements for drinking water treatment may be up the same order of magnitude as the harvested energy by the ATES system.

The Numerical Simulation of the Aquifer Thermal Energy Storage Technology

2011 ◽  
Vol 225-226 ◽  
pp. 390-394 ◽  
Author(s):  
Jun Kui Cui ◽  
Xin Lei Nan
Keyword(s):  
Energy Storage ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Fossil Fuel ◽  
Water Source ◽  
Underground Water ◽  
Energy Storage Technology ◽  
Aquifer Thermal Energy Storage ◽  
Different Seasons ◽  
Simulation Results

The aquifer thermal energy storage (ATES) system can make use of the heat of summer and the cold of winter, despite in different seasons, which can help to reduce the usage of the fossil fuel effectively, as a result, the atmospheric pollution can be reduced. This article firstly summarized the fundamental principles and the classifications of the ATES, and it also deduced and established the ATES mathematical model, and then numerical difference arithmetic was used to program so as to gain the simulation results. On the basis of the above, the author looks forward to the prospective of the aquifer thermal energy, and also provides the references to the applications of the ATES and the studies of the underground water source heat pump.

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