Development of SrBr2 composite sorbents for a sorption thermal energy storage system to store low-temperature heat

Hybrid strontium bromide-natural graphite composites for low to medium temperature thermochemical energy storage: Formulation, fabrication and performance investigation

“…For doing so, the experimentally measured specific heat was first curved fitted using a shape preserving spline interpolation method and the thermochemical contribution was directly obtained from the differential scanning calorimetry data shown in Figure 8. One can see immediately the exceptional benefits of the TCS composites: considering a charging temperature of 80°C, as for example proposed in [19], the energy density can reach ~500kJ/kg and this same total energy density of the pure SrBr2 can also be achieved by the TCS composites. It is relevant to emphasize that the energy density achieved by our hybrid composite is significant for the narrow temperature range considered (80°C charging); other composites proposed in the literature have achieved similar storage capacity only with larger temperature ranges (100°C or above) [12,29] Such advantage of our composite has the potential to significantly impact on the economics of the TCS systemsone can achieve the same with less than half of the hydrate and hence significant cost reductionone of the key barriers preventing industrial uptake of the TCS technology [11].…”

“…At a TCS device level, heat transfer enhancement techniques are often used, e.g. fins, metallic meshes, to overcome the low thermal conductivity of pure salts [19,23,34], which increase the total cost of TCS devices due to the use of extra parts and more complex manufacture processes, and decreases the effective thermal energy storage density due to extra volume occupied by extra components. This demonstrates clear benefits in resolving the low thermal conductivity issue through the use of TCS composite materials.…”

“…MgSO4, CaCl2 and LiBr) in different structural materials including zeolite, silica gel and activated carbon [12,17,18]. Composite TCS containing SrBr2, however, remains largely unexplored, and the published studies were primarily on energy storage density [19][20][21] or on the performance of pure SrBr2 at the reactor scale [8,22] [23]. To our knowledge, no studies have been published on linkage between the performance and structure of the composite TCS containing SrBr2the main motivation of this paper.…”

MgSO4·7H2O filled macro cellular foams: An innovative composite sorbent for thermo-chemical energy storage applications for solar buildings

“…This class of materials is based on two components: the host matrix and the inorganic salt placed inside the matrix pores. Several types of matrices and/or additives were proposed for application with salt hydrates, such as mesoporous materials, clays and carbonaceous structures (Xu et al, 2018;Zhao et al, 2016). Whiting et al (Whiting et al, 2013 and Hongois et al (Hongois et al, 2011) used the wet impregnation method for the realisation of a MgSO 4 into different types of zeolites.…”

Hydrated Salt/Graphite/Polyelectrolyte Organic-Inorganic Hybrids for Efficient Thermochemical Storage

“…Furthermore, thermal conductivity values obtained in this work were significantly higher than previously reported values for similar graphite SBH composites. [24,32]. As clearly depicted by the characterization reported in Figure 6, the composite with a PDAC/G ratio of 0.5 was capable of achieving superior water adsorption kinetics while maintaining high thermal conductivity values thus proving that the inclusion of a polymer binder was a successful strategy for the design of an efficient thermochemical storage solution.…”