Multi-functional three-phase sorption solar thermal energy storage cycles for cooling, heating, and heat transformer

Solar energy utilisation: Current status and roll-out potential

“…Recently, to improve the energy storage density of absorption thermal storage systems, different new cycles, system configurations, and working pairs have been investigated by researchers [48]. Mehari et al [51] proposed a multi-functional three-phase sorption TES cycle to simultaneously achieve higher temperature lift and energy storage density. Different applications could be completed in this cycle, including interseasonal heating, combined cooling and heating in summer, and heat transformer in summer and winter.…”

The Redesigning of Transformers Fins in Terms of Heat Transfer Rates

“…(Zhang et al, 2021) [12] The hot spot temperature (HST) is an essential property that reflects the traction transformer's having to work state, and the load characteristics have a significant impact on the HST. The load characteristics of transformers are rarely considered in depth in recent research, and most temperature research focuses on steady load.…”

High-Performance Cascade Sorption Thermal Storage Battery for Long-Term Applications in Cold Regions

“…This makes the sorption thermal storage advantageous in comparison to sensible heat storage and latent heat storage. Thus, several studies on STBs have been conducted, aiming to enhance the energy storage density (ESD), coefficient of performance (COP), and temperature lift. − Considerable efforts have been made focusing on proposing more efficient STBs and alternative working pairs to improve the performance of STBs. , As for long-term storage, the conventional STB is preferable due to its simplicity but has limited sorption capacity and operating range. The double- and multiple-stage STBs can extend the working temperature range and achieve a higher ESD and a larger temperature lift; however, it compromises the COP .…”

“…Recently three-phase sorption thermal storage has been studied to further improve the ESD of an STB using working pairs of LiCl/H 2 O, LiBr/H 2 O, and CaCl 2 /H 2 O . The ESD of a single-stage three-phase STB can be as high as 1250 kWh/m 3 with LiCl/H 2 O, while the double-stage three-phase STB output temperature could be 70 °C . Compression-assisted STBs with ionic liquids as absorbents were proposed, and the maximum ESD reached about 200 kWh/m 3 . , However, when the evaporation temperature is low, the water-based STB cannot function since water-freezing issues become challenging as the ambient temperature is below 0 °C.…”