Pregled bibliografske jedinice broj: 1128352
The Impact of Active and Passive Thermal Management on the Energy Storage Efficiency of Metal Hydride Pairs Based Heat Storage
The Impact of Active and Passive Thermal Management on the Energy Storage Efficiency of Metal Hydride Pairs Based Heat Storage // Energies, 14 (2021), 11; 3006, 24 doi:10.3390/en14113006 (međunarodna recenzija, članak, znanstveni)
CROSBI ID: 1128352 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
The Impact of Active and Passive Thermal
Management on the Energy Storage Efficiency of
Metal Hydride Pairs Based Heat Storage
Autori
Nyallang Nyamsi, Serge ; Tolj, Ivan
Izvornik
Energies (1996-1073) 14
(2021), 11;
3006, 24
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
heat storage ; metal hydride ; active and passive heat management ; energy storage efficiency ; energy storage density
Sažetak
Two-tank metal hydride pairs have gained tremendous interest in thermal energy storage systems for concentrating solar power plants or industrial waste heat recovery. Generally, the system’s performance depends on selecting and matching the metal hydride pairs and the thermal management adopted. In this study, the 2D mathematical modeling used to investigate the heat storage system’s performance under different thermal management techniques, including active and passive heat transfer techniques, is analyzed and discussed in detail. The change in the energy storage density, the specific power output, and the energy storage efficiency is studied under different heat transfer measures applied to the two tanks. The results showed that there is a trade-off between the energy storage density and the energy storage efficiency. The adoption of active heat transfer enhancement (convective heat transfer enhancement) leads to a high energy storage density of 670 MJ m−3 (close to the maximum theoretical value of 755.3 MJ m−3). In contrast, the energy storage efficiency decreases dramatically due to the increase in the pumping power. On the other hand, passive heat transfer techniques using the bed’s thermal conductivity enhancers provide a balance between the energy storage density (578 MJ m−3) and the energy efficiency (74%). The utilization of phase change material as an internal heat recovery medium leads to a further reduction in the heat storage performance indicators (142 MJ m−3 and 49%). Nevertheless, such a system combining thermochemical and latent heat storage, if properly optimized, can be promising for thermal energy storage applications.
Izvorni jezik
Engleski
Znanstvena područja
Kemijsko inženjerstvo, Strojarstvo
