Influence of porous materials on growing the time of hot water supply for the solar collector

Abstract EN

The energy storage is the detention of energy at one time to utilize the for another time.

The aim of this work is to enhance the storing time in a hot water storage tank as long period as possible by filling the tank with a suitable porous media and the best filling level of the packed bed material.

This paper deals with the methods of thermal energy storage and its applications in the region of systems of solar water heating along with system of solar air heating and the substances used to preserve that thermal energy professionally.

The experiments were conducted for normal household use for a family of five persons using a solar heater consisting of a storage tank of 120 liters and a solar collector of 20 vacuum tubes in addition to a tank for storing porous media with a capacity of 50 liters.

The experiments were conducted without using porous media and using different levels of porous media (150, 300, 450 mm).

The results showed that an increase in the level of porous media contributes to the supply of hot water at a useful temperature for domestic use (above 20 °C) throughout the day.

Where 256 liters of hot water was consumed in the first experiment, 273 liters in the second experiment, 273 liters in the third experiment, 261 liters in the fourth experiment, and 207 liters in the fifth experiment.