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Title: Dynamic simulation model of a parabolic trough collector system with concrete thermal energy storage for process steam generation
Authors: Sattler, Johannes Christoph 
Alexopoulos, Spiros 
Caminos, Ricardo Alexander Chico 
Mitchell, John 
Ruiz, Victor 
Kalogirou, Soteris A. 
Ktistis, Panayiotis K. 
Boura, Cristiano Teixeira 
Herrmann, Ulf 
Major Field of Science: Engineering and Technology
Field Category: Environmental Engineering
Keywords: Solar energy;Solar collectors;Absorber tube
Issue Date: 25-Jul-2019
Source: Solar Power and Chemical Energy Systems Conference, 2018, 2–5 October, Casablanca, Morocco
Conference: Solar Power and Chemical Energy Systems Conference 
Abstract: Parabolic trough collector (PTC) systems are commercially available concentrating solar power plants widely known for their application to generate electrical power. To further reduce the dependency on fossil fuels, such systems can also be deployed for producing process heat for industrial purposes. In combination with a thermal energy storage system, this technology has the ability to reliably supply on-demand process heat. This paper gives details on a fully automated PTC system with concrete thermal energy storage (C-TES) and kettle-type boiler that supplies saturated steam for a beverage factory in Limassol, Cyprus. In the focus is the validation of a dynamic simulation model in Modelica® that physically describes the entire PTC system. The simulation model uses various plant data as inputs including mirror reflectivity and weather data from on-site measurements. The validation was carried out in three steps. First, the PTC was validated as a stand-alone component. A time-dependent inlet oil temperature vector was given as input and the outlet oil temperature was computed. The root mean square (rms) error between the measured to simulated outlet oil temperature values results in 3.86 % (equivalent to about 1.9 K). The second part of the validation then considered a complete PTC oil cycle in PTC-and-boiler operation mode (without C-TES). In the simulation, both the PTC inlet and outlet oil temperatures were computed. The result is a deviation < 4.25 % (rms) between measured to simulated values. Finally, in the third step, the C-TES model was validated as a stand-alone component. The deviation between measurement and simulated values is < 5 % compared to the design point.
Description: Published AIP Conference Proceedings, 2019, Volume 2126, Article number 150007
ISSN: 1551-7616
DOI: 10.1063/1.5117663
Rights: © 2019 Author(s).
Type: Conference Papers
Affiliation : Aachen University of Applied Sciences 
Protarget AG 
CADE Soluciones de Ingeniería 
Cyprus University of Technology 
Appears in Collections:Δημοσιεύσεις σε συνέδρια /Conference papers or poster or presentation

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