A Numerical and Experimental Analysis of the Performance of a Combined Solar Unit for Air Conditioning and Water Desalination

Authors: Zied Guidara, Alexander Morgenstern, Aref Younes Maalej

Abstract:

In this paper, a desiccant solar unit for air conditioning and desalination is presented first. Secondly, a dynamic modelling study of the desiccant wheel is developed. After that, a simulation study and an experimental investigation of the behaviour of desiccant wheel are developed. The experimental investigation is done in the chamber of commerce in Freiburg-Germany. Indeed, the variations of calculated and measured temperatures and specific humidity of dehumidified and rejected air are presented where a good agreement is found when comparing the model predictions with experimental data under the considered range of operating conditions. Finally, the study of the compartments of desalination and water condensation shows that the unit can produce an acceptable quantity of water at the same time of the air conditioning operation.

Keywords: Air conditioning, desalination, condensation, design, desiccant wheel.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1338852

References:

[1] Y. J. Dai, R. Z. Wang, H. F. Zhang, J. D. Yu, Use of liquid desiccant cooling to improve the performance of vapour compression air conditioning, Appl Therm Eng, 21 (2001) 1185–1202.
[2] P.L. Dhar, S.K. Singh, Studies on solid desiccant based hybrid airconditioning systems, Appl Therm Eng, 21 (2001) 119-134.
[3] Seiichi Yamaguchi, Jongsoo Jeong, Kiyoshi Saito, Hikoo Miyauchi, Masatoshi Harada, Hybrid liquid desiccant air-conditioning system: Experiments and simulations, Appl Therm Eng, 31 (2011) 3741-3747.
[4] Sand JR, Fischer JC, Active desiccant integration with packaged rooftop HVAC equipment, Appl Therm Eng, 25 (2005) 3138-3148.
[5] Hans-Marting Henning, Solar assisted air conditioning of buildings – an overview, Appl Therm Eng, 27(2007) 1734–1749
[6] Chaouki Ali; Habib Ben Bacha; Mounir Baccar; Aref Y. Maalej, Dynamic modelling and simulation of a new air conditioning prototype by solar energy, Renewable Energy, 32 (2007) 200-215.
[7] G. Panaras, E. Mathioulakis, V. Belessiotis, Solid desiccant air conditioning systems -Design parameters, Energy, 36 (2011) 2399-2406.
[8] Zied Guidara, Wissem Zghal, Habib Ben Bacha, Modelling and simulation study of regeneration and dehumidification stages used in solar air conditioning unit, International Journal of Mechanics and Energy, Vol. 1, Issue 1, (2013) 54-64.