Life Cycle Assessment of heat transfer fluids in parabolic trough concentrating solar power technology

Batuecas, E.; Mayo, Carlos; Díaz, Rocío Pérez; Pérez, F.J.

doi:10.1016/j.solmat.2017.06.032

Cited by 30 publications

(19 citation statements)

References 56 publications

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“…Another way is to use a liquid HTF having a higher heat capacity (e.g., molten salts, synthetic oils) instead of the pressurized air. But it will bring new problems such as the solidification of molten salts and the higher environmental impacts [Batuecas, 2017].…”

Section: Electricity Consumption/productionmentioning

confidence: 99%

Dynamic modeling and simulation of a concentrating solar power plant integrated with a thermochemical energy storage system

Pelay

Luo

Fan

et al. 2020

Journal of Energy Storage

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This paper presents the dynamic modeling & simulation of a concentrating solar power (CSP) plant integrated with a thermochemical energy storage (TCES) system. The TCES material used is calcium hydroxide and the power cycle studied is a Rankine cycle driven by the CSP. Firstly, dynamics models of components written in Modelica language have been selected, developed, parametrized, connected and regulated to create the CSP plant with different TCES integration concepts. Then simulations were then performed to determine and compare the energy efficiency, water consumption and energy production/consumption of three integrations concepts for two typical days (summer and winter) and for a basic continuous production mode. After that, a feasibility study has been performed to test a peak production scenario of the CSP plant. The results showed that a TCES integration could increase the overall efficiency of the CSP plant efficiency by more than 10%. The Turbine integration concept has the best global efficiency (31.39% for summer; 31.96% for winter). The global electricity consumption of a CSP plant with TCES represents about 12% of its total energy production for a summer day and 3% for a winter day. An increased nominal power by a factor of 10 could be reached for the peak production mode within one hour using the Turbine integration concept, but with a lower global efficiency (17.89%).

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Section: Electricity Consumption/productionmentioning

confidence: 99%

Dynamic modeling and simulation of a concentrating solar power plant integrated with a thermochemical energy storage system

Pelay

Luo

Fan

et al. 2020

Journal of Energy Storage

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“…Oil costs are higher than salt for the same volume and energy capacity of storage given sufficiently high temperature changes. This is due to higher prices per unit mass and lower densities that higher heat capacities do not overcome [82]. Some thermal oil properties are shown in Table 8.…”

Section: Thermal Oilmentioning

confidence: 99%

“…Additional investigation may be needed for lower temperature applications as the possible temperature difference for thermal oils may be higher than salts. Thermal oils also have higher environmental impact concerns than salts, affecting their selection [82]. Table 8.…”

Section: Thermal Oilmentioning

confidence: 99%

“…Molten salts exhibit fewer environmental concerns, earning a FOM of 1 for this section but due to the high liquidus temperature, heat tracing forces the minimum turndown FOM to also be a 1. Thermal oils have more significant environmental concerns, both with leakage and deposition after use, and so a FOM of 0 is assigned in this category, but their more optimal temperature operating range does not force any additional turndown requirements [82]. Table 18 presents the FOM results for thermocline sensible heat systems.…”

Section: Molten Salt and Thermal Oil Thermoclinementioning

confidence: 99%

“…The split between environmental concerns and minimum turndown requirements is identical for 2-tank systems as thermoclines for molten salts and thermal oils, as each split a 0 and 1 in these two FOM categories. The oil has more environmental concern while the molten salts must be kept from freezing [82]. Table 19 presents the FOM values for two-tank sensible heat systems using molten salts or thermal oils.…”

Section: Two-tank Molten Salt and Thermal Oilmentioning

confidence: 99%

See 2 more Smart Citations

Initial Performance Evaluation and Ranking of Thermal Energy Storage Options for Light Water Reactor Integration to Support Modeling and Simulation

Mikkelson

Frick

Bragg‐Sitton

et al. 2019

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This report provides an in-depth analysis of current thermal storage technologies in the marketplace as of 2019 and develops a phenomenological identification ranking table (PIRT) and Figure of Merit (FOM) study for near-term thermal energy storage technologies with light water reactor technology. Particular focus was given the NuScale reactor as part of the Joint Use Modular Plant (JUMP) program between INL, NuScale, and the Utah Associated Municipal Project (UAMPs).It is fair to notice that the changes in the scope of the Integrated Energy System program led this report to focus more on thermal energy storage than on hydrogen as a form of local energy storage. This is due to LWRS (Light Water Reactor Sustainability) program picking up this area of research with an industrial partner as a part of a CRADA.Moreover, instead of trying to develop few initial models of some storage technologies, it has been chosen to analyze a broader range of thermal storage technologies and models available in literature. This takes also in consideration that any new model development in modelica would become soon obsolete, giving the decision to reshape the hybrid ecosystem of modelica models, which is part of FY2020 effort.Ancillary service industries and technologies are explored in detail to ascertain thermodynamic requirements for integration with thermal energy storage technologies. These industries include steel manufacturing, hydrogen production, desalination, pulp and paper manufacturing. It was determined that a large percentage of these industries can make use of existing nuclear output temperatures and pressures. Storage technologies that can maintain these values are advantageous for coupling purposes.The report then analyzes ten thermal energy storage technologies, with thirteen specific systems discussed in detail regarding their potential to integrate with LWR technology. A ranking tool identified important characteristics of thermal storage and ranked each of the technologies. Concrete, molten salt, and thermal oil sensible heat storages, and steam accumulators evaluated highly. After including cost estimations and qualitatively comparing these technologies, it is recommended that either molten salt or thermal oil is used for implementation with the JUMP module. The TES project cost will likely cost between $14,000,000 and $50,000,000. The potential flexibility of a two-tank sensible heat storage system should be able to demonstrate various new uses for nuclear heat. From power peaking via steam or liquid air heat topping to process heat applications, a two-tank system should be able to best provide a constant power transfer capability to the auxiliary energy consumer.Through commencement of this work, a more refined thermal storage selection process for Nuscale and existing nuclear power plants can be conducted. The ranking system developed here can be used to reevaluate the energy storage options periodically depending on the projected installation dates. Current results suggest two-tank thermal energy storage i...

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ZeoPTES: Zeotropic Pumped Thermal Energy Storage with an Ammonia–Water Mixture as Working Fluid

Bernehed

2021

Energy Tech

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The rapid rise of renewable energy production necessitates the development of large‐scale electricity storage systems. Pumped thermal energy storage (PTES), where electricity is stored in hot and cold storage units, has recently garnered a lot of interest. Previously proposed PTES systems rely on pure fluids as working fluids in Brayton‐ or Rankine‐based power cycles. Herein, ZeoPTES, a PTES system using a zeotropic mixture of ammonia and water as working fluid, is introduced. The mixture exhibits nonisothermal evaporation and condensation, which allows utilization of industrially available sensible storage units, like water or molten salt, to store the thermal energy from these phase changes. A simulation using the REFPROP 10.0 database is written to analyze the cycle. Eight parameters are identified as having an effect on system round‐trip efficiency and 30 000 simulations with random values for these parameters are run to identify the impact of all. Although efficient compressors and expanders are necessary to reach a high power‐to‐power round‐trip efficiency, the largest system‐wide losses arise from entropy generation and thermal stream mismatch in the cold and hot side heat exchangers. Using state‐of‐the‐art microchannel heat exchangers with extremely low pinch points allows for round‐trip efficiencies in excess of 70%.

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Life Cycle Assessment of heat transfer fluids in parabolic trough concentrating solar power technology

Cited by 30 publications

References 56 publications

Dynamic modeling and simulation of a concentrating solar power plant integrated with a thermochemical energy storage system

Dynamic modeling and simulation of a concentrating solar power plant integrated with a thermochemical energy storage system

Initial Performance Evaluation and Ranking of Thermal Energy Storage Options for Light Water Reactor Integration to Support Modeling and Simulation

ZeoPTES: Zeotropic Pumped Thermal Energy Storage with an Ammonia–Water Mixture as Working Fluid

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