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Air-Sand Heat Exchanger

Baumann, Torsten and Boura, Cristiano and Eckstein, Julian and Felinks, Jan and Göttsche, Joachim and Hoffschmidt, Bernhard and Schmitz, Stefan and Zunft, Stefan (2011) Air-Sand Heat Exchanger. In: Proceedings IRES 2011. IRES 2011, 28.-30. Nov. 2011 , Berlin.

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Abstract

This Paper summarizes research activities that analyse the thermodynamic behaviour of an Air / Sand Heat Exchanger, developed by Solar-Institut Jülich (SIJ) and the German Aerospace Centre (DLR). The numerical 3-D model, new results and a model validation of this particular cross-flow heat exchanger are presented. Simulation results were obtained for sand with 1-2 mm grain size. The simulation was validated with a new 15 kW prototype unit. Ansys, including Ansys-CFX, is used as modelling and simulation platform. Validation is made using a new test rig system. The bulk material is modelled by a porous solid medium without structural dynamic interaction between fluid and solid phase. For bulk material pressure drop model from Ergun is used. The model parameters were validated and fitted with measured values of a separate pressure drop test rig. The validation was done with quartz sand. To determine suitability of available granular products for the mentioned application, tests have been conducted regarding the thermomechanical properties as well as their attrition behaviour and abrasion on various wall materials.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:Air-Sand Heat Exchanger
Authors:
AuthorsInstitution or Email of Authors
Baumann, Torstentorsten.baumann@dlr.de
Boura, Cristiano SIJ
Eckstein, JulianSIJ
Felinks, JanSIJ
Göttsche, JoachimSIJ
Hoffschmidt, BernhardSIJ
Schmitz, StefanSIJ
Zunft, Stefanstefan.zunft@dlr.de
Date:2011
Journal or Publication Title:Proceedings IRES 2011
Status:Published
Keywords:Thermal energy storage, concentrating solar power, central receiver solar power plant, air sand heat exchanger, 3-D numerical simulation, particulate material
Event Title:IRES 2011
Event Location:Berlin
Event Type:international Conference
Event Dates:28.-30. Nov. 2011
Organizer:Eurosolar
HGF - Research field:Energy
HGF - Program:Efficient Energy Conversion (old)
HGF - Program Themes:E EV - Energy process technology (old)
DLR - Research area:Energy
DLR - Program:E EV - Energy process technology
DLR - Research theme (Project):E - Thermochemische Prozesse (old)
Location: Stuttgart
Institutes and Institutions:Institute of Technical Thermodynamics > Thermal Process Technology
Deposited By: Torsten Baumann
Deposited On:07 Dec 2011 13:41
Last Modified:07 Dec 2011 13:41

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