Maximizing Performances оf а Solar Domestic Hot Water System Through Optimum Position оf The Solar Collector

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). During SDHWS operation, different SDHWSs generate different amounts of heat from solar energy, and different amounts of avoided electrical energy are obtained. These investigations use computer software EnergyPlus. The used weather data are from the meteorological station. In this peper, it is analyzed energy optimization of the solar system for DHW heating with solar collector, which works by using the angle slope 37.5° and 12 different azimuth angle values, for each month during the year. In this occasion, it has been calculated solar fraction for each SDHWS as a function of number of optimum positions of the solar collector in SDHWS during year, for the city of Belgrade, Serbia and represented by the corresponding curves. It is also shown the monthly deficit of solar fraction for deviations the azimuth angle, when it is not optimal. It was used appropriate simulation and optimization routines with the modified methodology of the Hooke Jeeves algorithm. Solar energy systems have been improved, due to obtaining of minimum fossil energy consumption, reduction of the energy resources use, maximizing energy security, as well as the minimum impact on the environment.