Controller Design for Injection Mode Driven Direct Solar Steam Generating Parabolic Trough Collectors

Eck, Markus; Eberl, Markus

doi:10.1016/b978-008043895-5/50040-0

Cited by 6 publications

(4 citation statements)

References 3 publications

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“…28 shows that the outlet temperature settling time is increased and is worse than with the PI system: It can be seen however, in Fig. 29, that the IMC signal is no longer oscillatory: Eck and Eberl (1999) This work is among the first to study control systems applied to DSG in line focus collectors, even if it is with the injection mode. This architecture remains indeed today relatively poorly applied or studied.…”

Section: Performance Of the Control Systemsmentioning

confidence: 87%

“…The work of Eck and Eberl [33] presents the study of the per formance of two control systems, one using an adaptive PI controller, and the other one being Internal Model Control. Their study is explained below, including mentions of the original works from which models are derived.…”

Section: Control Systems For the Injection Operation Modementioning

confidence: 99%

“…Controller gain (a) and reset time (b) mapping with collector inlet mass flux and specific enthalpy, reprinted from[33].…”

mentioning

confidence: 99%

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Control systems for direct steam generation in linear concentrating solar power plants – A review

Aurousseau

Vuillerme

Bézian

2016

Renewable and Sustainable Energy Reviews

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Concentrating Solar Power (CSP) plants generate renewable electricity using the conversion of solar direct normal irradiation into thermal energy, then into mechanical work and electricity through the use of a thermodynamic cycle. Among the several available technologies, Direct Steam Generation (DSG), in which steam is generated directly in the absorber tubes of the solar field, and then directly fed to the turbine or thermal storage, holds interesting advantages. However, the steam generation system shows a difficult dynamic behavior which constitutes a challenge for the control system design. It is mainly due to the conjunction of the natural transient condition of solar irradiation and the presence of two phase flow in the absorber tubes. This paper reviews the control methods of the DSG systems used in linefocus CSP. The control systems are either proposed in literature, or actually applied in currently running plants or prototypes, although an extensive description is difficult to obtain in the case of the latter. The control systems are classified according to which DSG operation mode they refer to.

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Section: Performance Of the Control Systemsmentioning

confidence: 87%

Section: Control Systems For the Injection Operation Modementioning

confidence: 99%

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Control systems for direct steam generation in linear concentrating solar power plants – A review

Aurousseau

Vuillerme

Bézian

2016

Renewable and Sustainable Energy Reviews

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“…More sophisticated adaptive controllers will improve the controllability of the once-through process but they will increase the investment and management cost. Even though the test could not be completed, it has been discussed that the injection mode also requires a more sophisticated controller than the simple proportional-integral-derivative (PID) algorithm applied to the DISS plant [26]. Based on the experience obtained from the DISS project, the recirculation mode was determined the best among the three configurations.…”

Section: 1 S T E a M G E N E R A T I O N M O D Ementioning

confidence: 99%

Heat Transfer Fluids

Lenert

Nam

Wang

2012

Annual Rev Heat Transfer

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The choice of heat transfer fluids has significant effects on the performance, cost and reliability of solar thermal systems. In this chapter, we evaluate existing heat transfer fluids such as oils and molten salts based on a new figure of merit capturing the combined effects of thermal storage capacity, convective heat transfer characteristics and hydraulic performance of the fluids.Thermal stability, freezing point and safety issues are also discussed. Through a comparative analysis, we examine alternative options for solar thermal heat transfer fluids including watersteam mixtures (direct steam), ionic liquids/melts and suspensions of nanoparticles (nanofluids), focusing on the benefits and technical challenges. DOI: 10.1615/AnnualRevHeatTransfer.2012004122 SOURCE: Lenert, Andrej, Youngsuk Nam, and Evelyn N. Wang. "Heat Transfer Fluids." Annual Review of Heat Transfer 15, 2012. 2 DOI: 10.1615/AnnualRevHeatTransfer.2012004122 SOURCE: Lenert, Andrej, Youngsuk Nam, and Evelyn N. Wang. "Heat Transfer Fluids." Annual Review of Heat Transfer 15, 2012. 3 V averaged bulk velocity (ms -1 )

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