State-of-the-art and future development of sensible heat thermal electricity storage systems

Benato, Alberto; Stoppato, Anna; Mirandola, Alberto

doi:10.18280/ijht.35sp0134

Cited by 12 publications

(5 citation statements)

References 26 publications

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“…However, being electricity demand instantaneously balanced 24/7, huge and unpredictable power changes can be the source of imbalances between supply and demand that can provoke grid damage, user devices fault or blackouts. These unpleasant effects can be managed and/or limited using fossil fuels power plants working in cycling operation mode and energy storage units (see e.g., [7][8][9][10][11][12][13][14][15][16][17]).…”

Section: Introductionmentioning

confidence: 99%

Life Cycle Assessment of a Commercially Available Organic Rankine Cycle Unit Coupled with a Biomass Boiler

Stoppato

Benato

2020

Energies

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Organic Rankine Cycle (ORC) turbogenerators are a well-established technology to recover from medium to ultra-low grade heat and generate electricity, or heat and work as cogenerative units. High firmness, good reliability and acceptable efficiency guarantee to ORCs a large range of applications: from waste heat recovery of industrial processes to the enhancement of heat generated by renewable resources like biomass, solar or geothermal. ORC unit coupled with biomass boiler is one of the most adopted arrangements. However, despite biomass renewability, it is mandatory to evaluate the environmental impact of systems composed by boilers and ORCs taking into account the entire life cycle. To this purpose, the authors perform a life cycle assessment of a commercially available 150 kW cogenerative ORC unit coupled with a biomass boiler to assess the global environmental performance. The system is modelled in SimaPro using different approaches. Results show that the most impacting processes in terms of CO2 equivalent emissions are the ones related to biomass production and organic fluid leakages with 71% and 19% of the total. Therefore, being fluid release in the environment high impacting, a comparison among three fluids is also performed. Analysis shows that adopting a hydrofluoroolefin fluid with a low global warming potential instead of the hydrocarbon fluid as already used in the cycle guarantees a significant improvement of the environmental performance.

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Section: Introductionmentioning

confidence: 99%

Life Cycle Assessment of a Commercially Available Organic Rankine Cycle Unit Coupled with a Biomass Boiler

Stoppato

Benato

2020

Energies

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“…Therefore, as stated in several research works (see, e.g., [10][11][12][13][14][15][16]), to prevent such damaging situations, fossil fuel power stations need to be used as back-up units, and electricity energy storage systems need to be installed.…”

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confidence: 99%

An Experimental Investigation of a Novel Low-Cost Photovoltaic Panel Active Cooling System

Benato

Stoppato

2019

Energies

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Renewable energy sources are the most useful way to generate clean energy and guide the transition toward green power generation and a low-carbon economy. Among renewables, the best alternative to electricity generation from fossil fuels is solar energy because it is the most abundant and does not release pollutants during conversion processes. Despite the photovoltaic (PV) module ability to produce electricity in an eco-friendly way, PV cells are extremely sensitive to temperature increments. This can result in efficiency drop of 0.25%/ ∘ C to 0.5%/ ∘ C. To overcome this issue, manufacturers and researchers are devoted to the improvement of PV cell efficiency by decreasing operating temperature. For this purpose, the authors have developed a low-cost and high-performance PV cooling system that can drastically reduce module operating temperature. In the present work, the authors present a set of experimental measurements devoted to selecting the PV cooling arrangement that guarantees the best compromise of water-film uniformity, module temperature reduction, water-consumption minimization, and module power production maximization. Results show that a cooling system equipped with 3 nozzles characterized by a spraying angle of 90 ∘ , working with an inlet pressure of 1.5 bar, and which remains active for 30 s and is switched off for 120 s, can reduce module temperature by 28 ∘ C and improve the module efficiency by about 14%. In addition, cost per single module of the cooling system is only 15 €.

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“…According to their findings, the RTE of helium is greater, and at the isentropic conditions and greater pressure ratios, the energy storage performance increases. The charging process involved the use of an electric heater in a plant designed by Benato et al [27,28,43]. Moreover, a packed-bed (one-dimensional, two-phase) model is also developed, where two heat transfer fluids are tested along with nine heat storage materials.…”

Section: Joule-brayton Ptes Thermodynamic Cyclementioning

confidence: 99%

“…Heat engine expander and heat pump compressor components are used by Rankine PTES systems, and they are usually separated in standard configurations. Several studies have suggested that reversible configurations could be used in order to reduce investment costs [37][38][39][40][41][42][43][44].…”

Section: Conventional Rankine Cyclesmentioning

confidence: 99%

Pumped Thermal Energy Storage Technology (PTES): Review

Rabi

Radulovic

Buick

2023

Thermo

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In recent years, there has been an increase in the use of renewable energy resources, which has led to the need for large-scale Energy Storage units in the electric grid. Currently, Compressed Air Energy Storage (CAES) and Pumped Hydro Storage (PHES) are the main commercially available large-scale energy storage technologies. However, these technologies are restricted geographically and can require fossil fuel streams to heat the air. Thus, there is a need to develop novel large-scale energy storage technologies that do not suffer from the abovementioned drawbacks. Among the in-development, large-scale Energy Storage Technologies, Pumped Thermal Electricity Storage (PTES), or Pumped Heat Energy Storage, stands out as the most promising due to its long cycle life, lack of geographical limitations, the absence of fossil fuel streams, and the possibility of integrating it with conventional fossil-fuel power plants. There have been a number of PTES systems proposed using different thermodynamic cycles, including the Brayton cycle, the Rankine cycle, and the transcritical Rankine cycle. The purpose of this paper is to provide a comprehensive overview of PTES concepts, as well as the common thermodynamic cycles they implement, indicating their individual strengths and weaknesses. Furthermore, the paper provides a comprehensive reference for planning and integrating various types of PTES into energy systems.

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State-of-the-art and future development of sensible heat thermal electricity storage systems

Cited by 12 publications

References 26 publications

Life Cycle Assessment of a Commercially Available Organic Rankine Cycle Unit Coupled with a Biomass Boiler

Life Cycle Assessment of a Commercially Available Organic Rankine Cycle Unit Coupled with a Biomass Boiler

An Experimental Investigation of a Novel Low-Cost Photovoltaic Panel Active Cooling System

Pumped Thermal Energy Storage Technology (PTES): Review

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