engleski

Computational fluid dynamics analysis and optimization of residential building air conditioning

Abstract: Energy efficiency is of paramount importance in engineering practice today, especially in air conditioning of commercial buildings. To decrease the impact on the environment which is a result of increasing power consumption, as well as the operational costs of the system, it is important to design an efficient system. This paper deals with numerical analysis of apartment cooling using computational fluid dynamics analysis (CFD). Besides fluid dynamics, the model also incorporates heat transfer and mass transfer modeling (i.e. conduction, convection and relative humidity modeling). Previously conducted analysis using conventional calculation approach, according to the VDI 2078 norm, is carried out and the input from the analytical approach is used for the CFD model. The CFD model is developed to resolve the thermal comfort parameters to the higher extent when compared to the conventional analytical approach and to give insight in the spatially resolved air flow, heat transfer and relative humidity distributions in the numerical domains. The first objective of the research is to determine the optimal positioning of a single air conditioning unit in the apartment to result in the desired temperature and relative humidity distributions inside the unit, according to the thermal comfort requirements. The second objective is to determine if it is possible to decrease the total power consumption by installing two or more air conditioning units of lower cumulative nominal power. The CFD analysis results are compared to the results of the previously conducted analytical approach.

Computational Fluid Dynamics ; Heat and Mass Transfer ; Air Conditioning ; Thermal Comfort ; Optimization

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