Heat Transfer Fluids for Future Parabolic Trough Solar Thermal Power Plants

Eck, Markus; Hennecke, Klaus

doi:10.1007/978-3-540-75997-3_369

Cited by 27 publications

(16 citation statements)

References 4 publications

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“…Later on the energy of those HTF is used to produce steam for power generation. Commonly used HTF such as Therminol VP-1 (eutectic mixture of biphenyl and diphenyl oxide), thermal oil, and molten salt [2] have low decomposition temperature and high melting point, which are affecting the energy storage capacity and reducing the overall system efficiency, resulting in an increase of the operating cost. Therefore, there is an acute need for the new energy-efficient HTF.…”

Section: Introductionmentioning

confidence: 99%

Thermal performance of Al2O3 Nanoparticle Enhanced Ionic Liquids (NEILs) for Concentrated Solar Power (CSP) applications

Paul

Morshed

Fox

et al. 2015

International Journal of Heat and Mass Transfer

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Nanoparticle Enhanced Ionic Liquids (NEILs) were synthesized by dispersing aluminum oxide (Al 2 O 3) nanoparticles in 1-butyl-3-methylimidazolium bis{(trifluoromethyl)sulfonyl}imide, ([C 4 mim][NTf 2 ]) ionic liquids (ILs). The experimental assessment of NEILs includes investigating the effective thermophysical properties and forced convection heat transfer under laminar and turbulent flow regime. The results show that thermal conductivity and heat capacity enhanced up to ~11% and ~49% respectively for 0.9 vol% NEILs. The rheological behavior of NEILs shows non-Newtonian shear thinning behavior with shear viscosity decreasing with increasing shear rate. The viscosity of NEILs shows much higher value compared to the base ILs for a small amount of nanoparticles dispersion and also has a strong temperature dependency. Measured viscosity and thermal conductivity were found to be much higher than predicted by the well-established model for dilute suspensions. The convective heat transfer performance increases with the nanoparticles concentration within the measured nanoparticles vol%; up to ~27% and ~40% enhancement in heat transfer coefficient was found in laminar and turbulent flow regime respectively. The possible mechanisms of the enhanced thermal performance are discussed.

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Section: Introductionmentioning

confidence: 99%

Thermal performance of Al2O3 Nanoparticle Enhanced Ionic Liquids (NEILs) for Concentrated Solar Power (CSP) applications

Paul

Morshed

Fox

et al. 2015

International Journal of Heat and Mass Transfer

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“…From the HTF at high temperature, it is possible to generate process steam. The HTF selected for the transport of thermal energy was thermal oil, a eutectic mixture of biphenol and diphenol oxide, the trade name of which is Therminol® VP-1 [18].…”

Section: Solar Thermal Energy Collection and Supplymentioning

confidence: 99%

Renewable Energy Integration: Economic Assessment of Solar Energy to Produce Biodiesel at Supercritical Conditions

León

Montero

Coronado

et al. 2018

International Journal of Photoenergy

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In recent years, research on noncatalytic methods for biodiesel production has increased, mainly processes under supercritical conditions that allow the processing of waste vegetable oils (WVO) without the need to use catalysts, where the absence of catalyst simplifies the processes of purification of biodiesel. The high consumption of alcohol and energy to maintain the appropriate conditions of pressure and temperature of the reaction has turned the processes of supercritical conditions into an unfeasible method. However, the stages of biodiesel purification and methanol recovery are more straightforward, allowing the reduction of the total energy consumption by 25% compared to alkaline methods. Therefore, the present work describes a study through Aspen Plus® of the production of biodiesel by a process in supercritical conditions with WVO as raw material. Also, a solar collector arrangement was structured using the TRNSYS® simulator to supply energy to the process. To evaluate the economic feasibility of the proposed process, the installation of a pilot plant in Mexicali, Baja California, was considered. The internal rate of return (IRR) and the net present value (NPV) were determined for ten-year period. The planned system allows supplying solar energy, 69.5% of the energy required by the process, thus reducing the burning of fossil fuels and the operation cost. Despite the additional investment cost, for the solar collectors, the process manages to maintain a competitive production cost of USD 0.778/l of biodiesel. With an IRR of 31.7%, the investment is recovered before the fifth year of operation. The integration and implementation of clean technologies are vital in the development of the biofuels.

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“…Therefore, large amounts of solar irradiance must be concentrated to reach the temperature requirement. Currently, thermal oil-based solar thermal concentrators are operated below 450 o C [39][40][41][42]. Solar troughs, lenses, parabolic dishes, heliostats, and reflection mirrors are typical devices for solar thermal energy concentration.…”

Section: Solar Irradiance Concentratormentioning

confidence: 99%

Integrated fossil fuel and solar thermal systems for hydrogen production and CO2 mitigation

Wang

Naterer

2014

International Journal of Hydrogen Energy

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In most current fossil-based hydrogen production methods, the thermal energy required by the endothermic processes of the hydrogen production process is supplied by the combustion of a portion of the same fossil fuel feedstock. This increases the fossil fuel consumption and greenhouse gas emissions. This paper analyzes the thermodynamics of several typical fossil fuel-based hydrogen production methods such as steaam methane reforming, coal gasification, methane dissociation, and off-gas reforming, to quantify the potential savings of fossil fuels and CO2 emissions associated with the thermal energy requirement. Then matching the heat quality and quantity by solar thermal energy for different processes is examined. It is concluded that steam generation and superheating by solar energy for the supply of gaseous reactants to the hydrogen production cycles is particularly attractive due to the engineering maturity and simplicity. It is also concluded that steam-methane reforming may have fewer engineering challenges because of its single-phase reaction, if the endothermic reaction enthalpy of syngas production step (CO and H2) of coal gasification and steam methane reforming is provided by solar thermal energy.Various solar thermal energy based reactors are discussed for different types of production cycles as well.

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Heat Transfer Fluids for Future Parabolic Trough Solar Thermal Power Plants

Cited by 27 publications

References 4 publications

Thermal performance of Al2O3 Nanoparticle Enhanced Ionic Liquids (NEILs) for Concentrated Solar Power (CSP) applications

Thermal performance of Al2O3 Nanoparticle Enhanced Ionic Liquids (NEILs) for Concentrated Solar Power (CSP) applications

Renewable Energy Integration: Economic Assessment of Solar Energy to Produce Biodiesel at Supercritical Conditions

Integrated fossil fuel and solar thermal systems for hydrogen production and CO2 mitigation

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