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Building of a life-size testing unit for air conditioning by using TBAB hydrate slurry as a secondary two-phase refrigerant.
Author(s) : DOUZET J., HERRI J. M., BRANTUAS P., et al.
Summary
A complete air-conditioning system was built in the "Ecole Nationale Supérieure des Mines" of Saint-Etienne (France). This prototype stands both for a testing unit and for a life-size application. In this installation circulates a crystallised TBAB (tetra-n-butyl ammonium bromide), aqueous solution which presents the ideal physical characteristics for air conditioning: a melting point adjustable between 0 and 12.3°C and a high latent heat of melting. During the night, the TBAB hydrate slurry is generated and stored in a tank. In the daytime, this slurry is supplied to the air-conditioning heat exchangers. The prototype is instrumented in order to check the energy balances, to study the rheological properties and to monitor the sedimentation in the storage tank. Therefore, a numerical model was proposed to predict the evolution of the hydrates stock in the tank and the available cooling power in function of the tank geometry and the operating conditions. It takes into account hydrate settling, fluid circulation, hydrates formation (in generator) and hydrates melting. Also, the authors are designing a new type of hydrates generator based on the formation of TBAB-CO2 semiclathrates that is dissociated in TBAB hydrates in a second step.
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Details
- Original title: Building of a life-size testing unit for air conditioning by using TBAB hydrate slurry as a secondary two-phase refrigerant.
- Record ID : 2010-1489
- Languages: English
- Source: 9th Conference on Phase-Change Materials and Slurries for Refrigeration and Air Conditioning. Proceedings: Sofia, Bulgaria, September 29-October 1, 2010.
- Publication date: 2010/09/01
Links
See other articles from the proceedings (20)
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Indexing
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Themes:
Thermodynamics and changes of state;
Other air-conditioning equipment;
Two-phase flow;
Indirect refrigeration systems;
Two-phase secondary refrigerants (PCMs, ice slurries…) - Keywords: Test rig; Stratification; Prototype; PCM; Modelling; Two-phase mixture; Hydrate; Air conditioning; Change of phase; Thermal energy storage
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- Languages : English
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Prototyping of a real size air-conditioning sys...
- Author(s) : DOUZET J., KWATERSKI M., LALLEMAND A., et al.
- Date : 2013/09
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- Source: 9th Conference on Phase-Change Materials and Slurries for Refrigeration and Air Conditioning. Proceedings: Sofia, Bulgaria, September 29-October 1, 2010.
- Formats : PDF
View record