Evaluation on thermal and mechanical performance of the hot tank in the two-tank molten salt heat storage system

Wan, Zhenjie; Wei, Jinjia; Qaisrani, Mumtaz A.; Fang, Jiabin; Tu, Ning

doi:10.1016/j.applthermaleng.2019.114775

Cited by 48 publications

(17 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Methodologically, most of the models are based on computational fluid dynamic (CFD) simulations on the transient behavior [8], integration of solar energy [11] and/or commercial software through exergoeconomic analyses [17], and evaluation on thermal and mechanical performance of the hot tank [29]. Theoretical studies fully based on thermodynamic frameworks assuming Carnot-like models were conducted by Tess [30] and Chen et al [31], while works based on weak-dissipative models were reported by Guo et al for both pumped thermal [32] and cryogenic storage [33].…”

Section: Introductionmentioning

confidence: 99%

Pumped heat energy storage with liquid media: Thermodynamic assessment by a Brayton-like model

Salomone-González

González-Ayala

Medina

et al. 2020

Energy Conversion and Management

View full text Add to dashboard Cite

A thermodynamic model for a steady state pumped heat energy storage in liquid media is presented: it comprises a coupled Brayton-like heat pump and heat engine cycles connected to a cryogenic liquid and a hot molten salt by counter-flow heat exchangers. The model considers non-isothermal heat transfers between the working fluid and the liquid media and explicitly includes a set of parameters accounting for the main internal and external losses, heat leak, and pinch point effects for both the heat pump (charge) and heat engine (discharge) modes. Specific expressions for the main magnitudes in the charge (as the input power and coefficient of performance) and discharge (as power output and efficiency) modes and the global round trip efficiency have been analytically derived in terms of isentropic efficiencies of the compressor and turbine, pressure losses in the heat exchange processes, effectivenesses of the external counter-flow heat exchangers, and coupling between the working fluid and the storage and cryogenic liquid media. Round trip efficiencies around of 35 − 40% have been obtained, internal losses being those with main negative influence on the calculated values. The strong constraints imposed by the pinch point effects and liquid media have been analyzed. The model provides a thermodynamic assessment of the main involved processes and their interplay for a selected arrangement (molten salts, cryogenic fluid, and the charge and discharge power blocks) in order to check parametric strategies for thermodynamic optimization and design. These strategies are based on a reduced set of parameters of the overall installation and without the high computational costs of dynamical models.

show abstract

Section: Introductionmentioning

confidence: 99%

Pumped heat energy storage with liquid media: Thermodynamic assessment by a Brayton-like model

Salomone-González

González-Ayala

Medina

et al. 2020

Energy Conversion and Management

View full text Add to dashboard Cite

show abstract

“…Research on two tank optimization addresses aspects such as foundation design, heat losses, temperature distribution within the tanks and startup procedures 40–45. Recently a best practice study including tank aspects was also published 46.…”

Section: Commercial Molten Salt Storage Systems In Concentrating Solamentioning

confidence: 99%

Molten Salt Storage for Power Generation

Bauer

Odenthal

Bonk

2021

Chemie Ingenieur Technik

View full text Add to dashboard Cite

Storage of electrical energy is a key technology for a future climate‐neutral energy supply with volatile photovoltaic and wind generation. Besides the well‐known technologies of pumped hydro, power‐to‐gas‐to‐power and batteries, the contribution of thermal energy storage is rather unknown. At the end of 2019 the worldwide power generation capacity from molten salt storage in concentrating solar power (CSP) plants was 21 GWhel. This article gives an overview of molten salt storage in CSP and new potential fields for decarbonization such as industrial processes, conventional power plants and electrical energy storage.

show abstract

“…The results showed that the system with direct heat storage layout required a smaller 26% storage tank than the system with indirect heat storage layout. 61.90% of the concentrated solar thermal power generation system adopted dual-tank molten salt heat storage type by 2017 [14]. Noting that, researches on solar thermal ORC system focused on Organic working fluid selection, component configuration optimization, operation parameters analysis, and optimization.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Analysis and Comparison of Two Small-Scale Solar Electrical Power Generation Systems

Guo

Meng

et al. 2020

Sustainability

View full text Add to dashboard Cite

In this study, two schemes of solar electrical power generation are designed and compared according to solar collection area minimization. The one comprises the parabolic trough collector, dual-tank of molten salt heat storage, and Organic Rankine cycle. The other consists of photovoltaic cell, polymer electrolyte membrane water electrolyzer, and polymer electrolyte membrane fuel cell. The effects of irradiation value, environmental temperature, and energy storage type on thermodynamic performance were investigated. The results indicated that the solar irradiation value had a more obvious effect on the PV (photovoltaic) cell performance than environmental temperature, and the PTC (parabolic trough concentrator) performance was improved with the increases of solar irradiation value and environmental temperature. The environmental temperature effect was negligible; however, the influence of irradiation value was obvious. Irradiation value had a positive effect on the former system, whereas it demonstrated the opposite for the latter. The latter system had much lower efficiency than the former, due to the low conversion efficiency between hydrogen energy and electrical energy in the polymer electrolyte membrane water electrolyzer and fuel cell. Stated thus, the latter system is appropriate for the power generation system with non-energy storage, and the former system is promising in the power generation system with energy storage.

show abstract

Evaluation on thermal and mechanical performance of the hot tank in the two-tank molten salt heat storage system

Cited by 48 publications

References 22 publications

Pumped heat energy storage with liquid media: Thermodynamic assessment by a Brayton-like model

Pumped heat energy storage with liquid media: Thermodynamic assessment by a Brayton-like model

Molten Salt Storage for Power Generation

Thermodynamic Analysis and Comparison of Two Small-Scale Solar Electrical Power Generation Systems

Contact Info

Product

Resources

About