Options
Modeling and experimental validation of the desiccant wheel in a hybrid desiccant air conditioning system
Publikationstyp
Journal Article
Date Issued
2012-11-05
Sprache
English
Author(s)
Institut
Journal
Volume
51
Issue
1-2
Start Page
1082
End Page
1091
Citation
Applied Thermal Engineering 51 (1-2): 1082-1091 (2013)
Publisher DOI
Scopus ID
Publisher
Elsevier Science
Modeling can be strong asset to the operation of air conditioning plants taking into account e.g. the strong dependency of local climate conditions for the operation of HVAC systems. This paper presents a validated physical model and a simplified model based on the results of the physical model for a desiccant wheel, which is the central part of a hybrid air conditioning system. The two models offer different advantages: While the physical model is complex and can be adapted flexibly to different wheel dimensions, desiccant materials or climatic conditions; the simplified model requires no knowledge of underlying equations and modeling language utilized and can be used for a first assessment of the potential of a desiccant cooling system in a certain location or for the use within online control systems. The coexistence of both models ensures that information tailored to the users' needs are made available. The validity of the physical model, and therewith the simplified model, is ensured through comparison with measurement obtained from a hybrid air conditioning system situated in northern Europe. The demonstration plant combines the advantages of a dedicated outdoor air system (DOAS) with the advantages of the common hybrid desiccant system to allow for energy efficient air conditioning in one installation. The availability of primary measurement data is extremely valuable to the process of model validation because knowledge about uncertainties and bias in measurement data unlikely to be known for secondary data can be used to understand and validate model results. A comparison of simulation results from the physical model to measurement data from the demonstration plant shows good compliance for a typical day of wheel operation after adjusting relevant model parameters.
Subjects
Air conditioning
Coupled heat and mass transfer
Desiccant wheel
Modelica
Sorption
DDC Class
530: Physik
600: Technik
620: Ingenieurwissenschaften
Funding Organisations
More Funding Information
This work is being conducted in the frame of a project funded by the Federal Ministry of Economics and Technology (www.bmwi.de), cf. project funding reference number 0327452A.