Gases as Working Fluid in Parabolic Trough CSP Plants

Cipollone, Roberto; Cinocca, Andrea; Gualtieri, Angelo

doi:10.1016/j.procs.2013.06.093

Cited by 25 publications

(19 citation statements)

References 6 publications

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“…The development of thermally stable HTFs which exceed the disassociation points of currently used HTFs is an active area of research. [199][200][201] Another important aspect regarding the temperature stability of the HTF is its freezing point. The diurnal nature of the sun forces the HTF to operate between the CSP plant's peak operating temperature and the night-time temperature.…”

Section: Desired Characteristics and Figures Of Meritmentioning

confidence: 99%

Concentrating Solar Power

et al. 2015

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Concentrating solar power (CSP) is a reliable and wellknown form of solar power. Nine solar trough plants producing more than 400 megawatts (MW) of electricity have been operating reliably in the California Mojave Desert since the 1980s. With a renewed sense of urgency to commercialize renewable energy sources, the U.S. Department of Energy (DOE) is ramping up its CSP research, development, and deployment efforts. These efforts, which are leveraging both industry partners and the national laboratories, are directed toward the development of parabolic trough, dish/engine, and power tower CSP systems.

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Section: Desired Characteristics and Figures Of Meritmentioning

confidence: 99%

Concentrating Solar Power

et al. 2015

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“…When considering molten salts, a minimum temperature should be always guaranteed for the HTF to avoid solidification which occurs at high temperatures such at 200˚C. A real breakthrough could be represented with the use of gases as HTF as discussed in [11,19]. During the last years, the authors focused their attention on a new solar conversion section based on the direct expansion of air (considered as a HTF) inside gas turbines [16].…”

Section: Dec-based Pt-csp Plants Featuresmentioning

confidence: 99%

“…In the previous papers, the authors discussed the setup of the main thermodynamic parameters (maximum pressure and temperature, number of compressions and expansions, solar fields at different operating pressures, etc. [11,16,17]) and the main construction and financial aspects related to the overall solar collector length.…”

Section: Dec-based Pt-csp Plants Featuresmentioning

confidence: 99%

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Integration between concentrated solar power plant and desalination

Cipollone

Cinocca

Talebbeydokhti

2016

Desalination and Water Treatment

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A B S T R A C TFresh water and electricity production in desert areas via the use of solar radiation represent examples of sustainability. The concentration of solar power by means of parabolic trough (PT-CSP) technology has a great potential not yet exploited in the realm of renewable energy production. A new technology for the solar energy section is being proposed by the authors which uses air as a working fluid. The use of air allows the cycle to be coupled with an inter-cooled compression section and a re-heated expansion section which is called Discrete Ericsson Cycle, (DEC-based plant). The paper presents an integration of such a CSP-DEC plant with desalination: where freshwater is produced according to a Low Temperature Multi Effect Distillation (LT-MED) technology. The LT-MED plant operates on the heat from the air coolers in the inter-stage cooling of the DEC-based plant. This heat is normally expelled to atmosphere. In fact, the heated air has the same temperature ranges required for the operation of the LT-MED desalination technology. This provides an efficient integration of energy for desert applications. The most important feature of this new solar energy plant is that the thermal needs of desalination in DEC-based plants do not interfere with the electricity production of the plant as is the case for current conventional PT-CSP plants which use diathermic oils as Heat Transfer Fluid (HTF). When the performance of the CSP DEC-based plants, integrated with the LT-MED technology, are compared to conventional CSP plants, they show an increased efficiency in terms of fresh water production per unit of energy produced. Thus, fresh water production can be considered as a valuable addition to the plant.

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“…In a recent analysis, Bellos et al [9] examined six gas working fluids (air, nitrogen, carbon dioxide, helium, argon and neon) exergetically and finally carbon dioxide was proved to be the most efficient working fluid in high temperature levels. Cipollone et al [10] examined air and carbon dioxide as possible working fluids in a discrete Ericsson cycle and they finally proved that the use of carbon dioxide leads to higher performance. Carbon dioxide was found to be more efficient than nitrogen and ammonia for concentrating power plants in the study of Islam et al [11].…”

Section: Introductionmentioning

confidence: 99%

Energetic and exergetic investigation of a parabolic trough collector with internal fins operating with carbon dioxide

Bellos

Tzivanidis

Daniil

2017

Int J Energy Environ Eng

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The objective of this study is to determine the energetic and exergetic enhancement of parabolic trough collector with internal fins in the absorber. Carbon dioxide is the examined working fluid to investigate the performance of the system in high temperature levels. In the first part of this study, the impact of the mass flow rate on the collector performance is analyzed and finally 0.20 kg/s is selected as the most appropriate mass flow rate exergetically. In the second part, the impact of internal fins on the system performance is investigated for operation with the optimum mass flow rate. More specifically, the absorber without fins is compared with three different fins with lengths 5, 10 and 15 mm. The final results prove that the higher fin length increases the thermal performance, while the optimum fin length exergetically is 10 mm with 45.95% exergetic efficiency when the inlet temperature is equal to 400°C. The impact of the pressure losses along the collector is taken into account in the exergetic efficiency, which is the best index for evaluating solar collectors operating with gases. The analysis is performed with Solidworks Flow Simulation, a powerful tool which allows the simultaneous thermal and optical analysis.

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Gases as Working Fluid in Parabolic Trough CSP Plants

Cited by 25 publications

References 6 publications

Concentrating Solar Power

Concentrating Solar Power

Integration between concentrated solar power plant and desalination

Energetic and exergetic investigation of a parabolic trough collector with internal fins operating with carbon dioxide

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