Wrobel, JanJanWrobelMorgenstern, PaulaPaulaMorgensternSchmitz, GerhardGerhardSchmitz2021-09-242021-09-242012-11-05Applied Thermal Engineering 51 (1-2): 1082-1091 (2013)http://hdl.handle.net/11420/10386Modeling 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.en1359-431120121-210821091Elsevier ScienceAir conditioningCoupled heat and mass transferDesiccant wheelModelicaSorptionPhysikTechnikIngenieurwissenschaftenJournal Article10.1016/j.applthermaleng.2012.09.033Journal Article