Abstract
This paper analyses the influence of time-predicted night ventilation applied during the summer season on the total energy consumption of airconditioning system. Analysis has been made on the basis of a computer program for dynamic simulation of air-conditioned rooms thermal behavior. The program was developed at the Department for Thermal Engineering at the Faculty of Mechanical Engineering, University of Belgrade. Air-conditioning operating modes without and with application of night ventilation, and different periods of night ventilation are analyzed. Cooling loads, fan energy consumption and overall energy consumption for summer conditions for Belgrade for the whole cooling season are given. The obtained results were compared, and hereupon a review is given of the energy savings for the whole cooling season.
Highlights
In order to investigate the influence of night ventilation technique on total energy savings of air-conditioning system, operating modes are simulated for a typical airconditioned room, operating mode without night ventilation and different modes with application of time-driven night ventilation, where the period of night ventilation was varied
This paper analyses the influence of time-predicted night ventilation applied during the summer season on the total energy consumption of air-conditioning system for Belgrade weather conditions
The simulation program used for the analysis has been developed at the Department for Thermal Engineering at the Faculty of Mechanical Engineering, University of Belgrade [2]
Summary
In order to investigate the influence of night ventilation technique on total energy savings of air-conditioning system, operating modes are simulated for a typical airconditioned room, operating mode without night ventilation and different modes with application of time-driven night ventilation, where the period of night ventilation was varied. Simulation has been aided by a computer program for dynamic simulation of airconditioned rooms thermal behaviour, which was developed at the Department for Thermal Engineering at the Faculty of Mechanical Engineering in Belgrade [1]. The program, written in C language, which operates under Windows operating system, is based on a detailed mathematical model of non-steady state heat transfer in an air-conditioned space [2]
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