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Heat Exchangers
In order to be able to analyse the components of the solar thermochemical closed loop it is necessary to investigate all relevant thermodynamic properties of the species involved. This is especially true for the development of heat exchangers. Finding appropriate multi-phase data can be quite difficult, even for such important industrial chemicals like ammonia, nitrogen and hydrogen, especially for the overcritical temperature and pressure range.
The data gathered was used to develop a modelling program for tube in tube heat exchangers. By that means the performance of such heat exchangers can be predicted with an accuracy of 15%.
Further reading: "Performance Modelling of Tube-in-Tube Heat Exchangers for Ammonia-Based Solar Thermochemical Systems", Luzius Wirth, traineeship report.
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Last modified May 20, 1999
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