Thermal energy with long-term accumulation

Abstract

Accumulation of thermal energy in an underground reinforced concrete thermal energy tank with a volume of 24m3 of water, for 2 years. In these 2 years, 4 cycles are measured, namely 2 times charging and 2 times discharging. The measured data in these cycles indicate the charging and discharging time. By evaluating the data, we point out the losses of accumulated energy. Solar hot water collectors, which heat the medium in the thermal energy tank, serve as a source for recharging. The thermal energy tank has the potential to reduce the energy demand of buildings.