Thermal energy storage for CSP hybrid gas turbine systems: Dynamic modelling and experimental validation

Mahmood, Mariam; Traverso, Alberto; Massardo, Aristide F.; Cravero, Carlo

doi:10.1016/j.apenergy.2017.12.130

Cited by 35 publications

(16 citation statements)

References 33 publications

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“…One technique for deriving the appropriate constants involves the use of the Ergun equation [18], applicable over a wide range of Reynolds numbers and for many types of packing. This correlation has been validated in several works dealing with packed bed [19][20][21], but also by the authors in applications of regenerative chambers [5,6] and thermal storage CSP [22]. The coefficients C1 and C2 have been defined as follows, Eq.…”

Section: Direct Methodsmentioning

confidence: 79%

Strategies for the Numerical Modelling of Regenerative Pre-heating Systems for Recycled Glass Raw Material

Domenico¹,

Leutcha²,

Cravero³

2019

MMEP

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The rules on energy consumption and pollutant emissions impose increasingly restrictive limitations in today's industrial sectors. The glass production sector is one of the highest sources of energy consumption in Europe, but also in Italy. For this reason it is very important to develop strategies for consumption reduction in a glass production plant. A glass furnace is in fact conceived with systems to recover heat from the combustion gases through regenerative and recuperative systems in order to increase the efficiency of the plant. Several systems to reduce nitrogen oxides emissions have been also developed and designed. A further method to exploit the residual heat from the exhausted gases is to pre-heat the recycled glass raw material to be introduced into the furnace so as to require a smaller amount of energy for its melting. This paper shows various numerical strategies for the design of a pre-heating system for the recycled glass raw material through CFD techniques. In this regard, numerical models have been developed for systems with direct (hot gases come directly into contact with the raw material) and indirect heat exchange (the raw material is heated through the diffusion of heat from a tube bundle).

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Section: Direct Methodsmentioning

confidence: 79%

Strategies for the Numerical Modelling of Regenerative Pre-heating Systems for Recycled Glass Raw Material

Domenico¹,

Leutcha²,

Cravero³

2019

MMEP

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“…One technique for deriving the appropriate constants involves the use of the Ergun equation [16], applicable over a wide range of Reynolds numbers and for many types of packing. This correlation has been validated in several works dealing with packed bed [17,18], but also by the authors in applications of regenerative chambers [4,5] and thermal storage CSP [19]. The coefficients C1 e C2 have been defined as follows, Eq.…”

Section: Direct Methodsmentioning

confidence: 88%

CFD Modelling of Regenerative Pre-heating Systems for Recycled Glass Raw Material

Leutcha¹,

Cravero²

2019

IJES

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The glass production industry has one of the highest energy consumption rates and environmental emission impact with respect to the existing industrial sectors. Moreover, the glass production sector is important in Italy (with production plants spread all over the country from North to South) from both production rates and engineering design and development competencies point of view. The glass furnaces are nowadays conceived with regenerative or recuperative systems to take advantage of the residual heat from the combustion exhausts in order to increase the thermal efficiency of the system. The exhaust gases are also used in innovative systems to reduce the NOx emissions in specifically designed gas recirculation systems tailored to the glass furnace. A remaining portion of the heat content in the exhaust gases could be used to pre-heat the raw material from recycled glass that, in some applications, forms a significant percentage of the glass recipe. In order to develop pre-heating systems for recycled glass as compact as possible, a detailed analysis of the heat transfer from the gases to the glass need to be developed. In the paper different CFD models for the heating process of recycled glass are presented. A numerical model for the recycled glass loose particles has been developed and used in the CFD models for both direct (the exhaust gases flow through the recycled glass matrix) and indirect (the recycled glass is heated through heat diffusion from the hot gases that flow into pipes) systems.

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“…In case of energy storage systems, based on the compressed air [33] or high temperature materials (e.g. honeycomb ceramics [34], thermo-chemical reactors [35], etc. ), a significant additional volume is included.…”

Section: Ferrarimentioning

confidence: 99%

Surge prevention for gas turbines connected with large volume size: Experimental demonstration with a microturbine

et al. 2018

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The aim of this work is the demonstration of a surge prevention technique for advanced gas turbine cycles. There is significant surge risk in dynamic operation for turbines connected with large volume size additional components, such as a fuel cell stack, a saturator, a solar receiver or a heat exchanger for external combustion. In comparison with standard gas turbines, the volume size generates different behaviour during dynamic operations (with significant surge risk), especially considering that such additional components are including important dynamic constraints. In order to prevent the surge events, a vibration analysis was carried out to develop precursors which are able to highlight the approach of this unstable operative zone. Since the subsynchronous content of the measured vibrations is significantly increasing approaching the surge line, special attention was devoted to this parameter. The demonstration of a surge prevention system based on the sub-synchronous vibration content was carried out at the Innovative Energy Systems Laboratory of the University of Genoa. In this laboratory, a recuperated microturbine connected with a large size vessel was used. Starting from the stable operation, closing a valve in the main air line or increasing the compressor inlet temperature produced operative conditions with significant surge risk. The increase in sub-*Revised Manuscript with No Changes Marked Click here to download Revised Manuscript with No Changes Marked: Manuscript (Ferrari) CLEAN.doc Ferrari 2 synchronous vibration content detected by the control system was used to perform an active operation (bleed valve opening) to avoid the approaching surge event.

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Thermal energy storage for CSP hybrid gas turbine systems: Dynamic modelling and experimental validation

Cited by 35 publications

References 33 publications

Strategies for the Numerical Modelling of Regenerative Pre-heating Systems for Recycled Glass Raw Material

Strategies for the Numerical Modelling of Regenerative Pre-heating Systems for Recycled Glass Raw Material

CFD Modelling of Regenerative Pre-heating Systems for Recycled Glass Raw Material

Surge prevention for gas turbines connected with large volume size: Experimental demonstration with a microturbine

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