Desiccant-Based Air Handling Unit Alternatively Equipped with Three Hygroscopic Materials and Driven by Solar Energy

The energy demand for the air-conditioning of buildings has shown a very significant growth trend in the last two decades. In this paper three alternative hygroscopic materials for desiccant wheels are compared considering the operation of the air handling unit they are installed in. The analyses are performed by means of the TRNSYS 17® software, simulating the plant with the desiccant wheel made of: silica-gel, i.e., the filling actually used in the experimental plant desiccant wheel of the University of Sannio Laboratory; MIL101@GO-6 (MILGO), a composite material, consisting of graphite oxide dispersed in a MIL101 metal organic framework structure; Campanian Ignimbrite, a naturally occurring tuff, rich in phillipsite and chabazite zeolites, widespread in the Campania region, in Southern Italy. The air-conditioning system analyzed serves a university classroom located in Benevento, and it is activated by the thermal energy of a solar field for which three surfaces are considered: about 20, 27 and 34 m2. The results demonstrate that a primary energy saving of about 20%, 29%, 15% can be reached with silica-gel, MILGO and zeolite-rich tuff desiccant wheel based air handling units, respectively.

[1]  Mark Goldsworthy,et al.  Measurements of water vapour sorption isotherms for RD silica gel, AQSOA-Z01, AQSOA-Z02, AQSOA-Z05 and CECA zeolite 3A , 2014 .

[2]  P. J. Banks.  Prediction of Heat and Mass Regenerator Performance Using Nonlinear Analogy Method: Part 1—Basis , 1985 .

[3]  Kamaruzzaman Sopian,et al.  Agricultural solid wastes for green desiccant applications: an overview of research achievements, opportunities and perspectives , 2015 .

[4]  Carlo Roselli,et al.  Dynamic performance assessment of a micro-trigeneration system with a desiccant-based air handling unit in Southern Italy climatic conditions , 2014 .

[5]  Ruzhu Wang,et al.  Recent progress on desiccant materials for solid desiccant cooling systems , 2014 .

[6]  P. Banks,et al.  Coupled heat and mass transfer in regenerators—prediction using an analogy with heat transfer , 1972 .

[7]  Ryuichiro Yoshie,et al.  Performance of solar-desiccant cooling system with Silica-Gel (SiO2) and Titanium Dioxide (TiO2) desiccant wheel applied in East Asian climates , 2012 .

[8]  Ruzhu Wang,et al.  Analysis on a hybrid desiccant air-conditioning system , 2006 .

[9]  Carlo Roselli,et al.  Calibration and validation of a thermal energy storage model: Influence on simulation results , 2014 .

[10]  S. M. Maliyekkal,et al.  Chitosan reinforced boehmite nanocomposite desiccant: A promising alternative to silica gel. , 2018, Carbohydrate polymers.

[11]  Mehmet Kanoglu,et al.  Energy and exergy analyses of an experimental open-cycle desiccant cooling system. , 2004 .

[12]  Carlo Roselli,et al.  Experimental validation of constant efficiency models for the subsystems of an unconventional desiccant-based Air Handling Unit and investigation of its performance , 2012 .

[13]  Carlo Roselli,et al.  Numerical study of a MIL101 metal organic framework based desiccant cooling system for air conditioning applications , 2017 .

[14]  K. F. Fong,et al.  Impact of adsorbent characteristics on performance of solid desiccant wheel , 2018 .

[15]  Zhong Li,et al.  Adsorption isotherms and kinetics of water vapor on novel adsorbents MIL-101(Cr)@GO with super-high capacity , 2015 .

[16]  Francesco Pepe,et al.  Modelling of a Zeolite-Rich Tuff Desiccant Wheel , 2017 .

[17]  Y. Hwang,et al.  Performance of a desiccant wheel cycle utilizing new zeolite material: Experimental investigation , 2015 .

[18]  D. Caputo,et al.  Modeling of water and ethanol adsorption data on a commercial zeolite-rich tuff and prediction of the relevant binary isotherms , 2007 .

[19]  Carlo Roselli,et al.  Dynamic performance assessment of a solar-assisted desiccant-based air handling unit in two Italian cities , 2016 .

[20]  S. Srinivasa Murthy,et al.  Application of desiccant wheel to control humidity in air-conditioning systems , 2004 .

[21]  Stephen White,et al.  Characterization of desiccant wheels with alternative materials at low regeneration temperatures , 2011 .

[22]  Carlo Roselli,et al.  Performance Assessment of a Solar-Assisted Desiccant-Based Air Handling Unit Considering Different Scenarios , 2016 .

[23]  Ruzhu Wang,et al.  Experimental investigations on desiccant wheels , 2012 .

[24]  M. Goldsworthy,et al.  Experimental analysis and numerical modelling of an AQSOA zeolite desiccant wheel , 2015 .

[25]  Manish Mishra,et al.  Performance analysis of a solid desiccant assisted hybrid space cooling system using TRNSYS , 2018, Journal of Building Engineering.

[26]  Ruzhu Wang,et al.  Experimental comparison of two honeycombed desiccant wheels fabricated with silica gel and composite desiccant material , 2006 .