Optimization performances of a solar domestic hot water system using Taguchi method

Abstract

In Serbia, it is usually to use electrical energy for domestic hot water (DHW) heating. About 70% of electrical energy is produced by using coal with high greenhouse emission, so it is beneficial to environment to use solar energy for heating of DHW in solar DHW system (SDHWS). In addition, it is important to have the highest possible efficiency of this use that may be obtained for the solar collector placed at its optimal position. It is very important to maximize the value of the solar fraction during a SDHWS operation. With computer software EnegyPlus and Hooke-Jeeves algorithm, it was obtained the limit values of the slope and azimuth angle of the solar collector in SDHWS during year for Belgrade, Serbia. The used weather data are from the meteorological station. In this paper, it is stated that Taguchi design is suitable for analyzing in a systematic and simple way the maximum values of the solar fraction of the output parameters for various SDHWSs in the function of numerous optimal positions of the solar collector in the SDHWS, as well as which parameters have the greatest influence on the solar fraction, for Belgrade, Serbia.