Abstract
Heating and cooling form more than 70% of the energy consumption in the domestic sector, therefore an efficient and cost-effective thermal energy storage (TES) device needs to be developed in order to overcome the intermitted of renewable energy sources and shift the load to the off-peak times. In this work, a high-temperature TES-based heating device for domestic and mobile use is proposed. A high melting temperature (500 C and 700 C) Composite Phase Change Material (CPCM) was developed and used. The device was designed and built taking into account maximizing the energy density per volume, minimizing the heat losses and the charging time, controllable discharging temperature, and safety aspects. A mathematical and CFD modeling were carried out to predict and optimize the system performance. An experimental setup of a 5.6 kWh storage capacity system was built to validate the models and to verify the system performance. Several charging and discharging processes were conducted to evaluate the performance of the system. The experimental results showed that the charging time can be as short as 2.5 hours while the discharging times varied from 9.4 to 3.4 hours when the discharging temperature varied from 52 C to 90 C, giving a discharging power rate of 0.5 and 2 kW, respectively, with more than 80% of the overall efficiency.
| Original language | English |
|---|---|
| Journal | Energy Storage and Saving |
| Publication status | Accepted/In press - 30 Aug 2022 |
| Event | 1st International Conference on Energy Storage and Saving - Xi'an Jiaotong University, Xi'an, China Duration: 20 Oct 2022 → 23 Oct 2022 http://event.icrp.xjtu.edu.cn/111446712/ |
