Experimental investigation on an open sorption thermal storage system for space heating

Zhang, Yannan; Wang, R.Z.; Li, Tingxian

doi:10.1016/j.energy.2017.12.003

Cited by 49 publications

(17 citation statements)

References 25 publications

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“…Several combinations of salt hydrates and matrices for thermal energy storage exist. One of the salts that have been extensively evaluated in the scientific literature is MgSO 4 •7H 2 O, whose theoretical energy storage density is 2.8 GJ/m 3 [11] and can be used under both ambient pressure and sub-atmospheric pressure [12], thus being suitable for the application in open cycles or closed cycles. The salt can be efficiently regenerated also at temperatures < 150 • C, compatible with the integration in low-grade heat recovery systems or solar systems in buildings [13].…”

Section: Introductionmentioning

confidence: 99%

Morphological and Structural Evaluation of Hydration/Dehydration Stages of MgSO4 Filled Composite Silicone Foam for Thermal Energy Storage Applications

et al. 2020

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Salt hydrates, such as MgSO4∙7H2O, are considered attractive materials for thermal energy storage, thanks to their high theoretical storage density. However, pure salt hydrates present some challenges in real application due to agglomeration, corrosion and swelling problems during hydration/dehydration cycles. In order to overcome these limitations, a composite material based on silicone vapor-permeable foam filled with the salt hydrate is here presented. For its characterization, a real-time in situ environmental scanning electron microscopy (ESEM) investigation was carried out in controlled temperature and humidity conditions. The specific set-up was proposed as an innovative method in order to evaluate the morphological evolution of the composite material during the hydrating and dehydrating stages of the salt. The results evidenced an effective micro-thermal stability of the material. Furthermore, dehydration thermogravimetric/differential scanning calorimetric (TG/DSC) analysis confirmed the improved reactivity of the realized composite foam compared to pure MgSO4∙7H2O.

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Section: Introductionmentioning

confidence: 99%

Morphological and Structural Evaluation of Hydration/Dehydration Stages of MgSO4 Filled Composite Silicone Foam for Thermal Energy Storage Applications

et al. 2020

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“…The energy density of the fixed bed was also comparable to experiments performed by Zhang et al [59] that obtained 115 -137 kWh/m 3 for flow rates of 17 -50 m 3 /h [59]. In the design of an adsorption TES for a home, the storage capacity would determine the minimum amount of material required per charge/discharge cycle for a seasonal storage system based on the annual demand of the heating load, whereas the column energy density would dictate the volume of the adsorber required for meeting the demand on a shorter time-scale (e.g., hourly), as the adsorber is only a fraction of the whole system including the material storage.…”

supporting

confidence: 86%

“…This result was expected as the adsorption equilibrium of the zeolite 13X-water vapour pair is independent of air flow rate[58]. The amount of water uptake observed indicates that the zeolite samples reached an average adsorption capacity (q eq ) of 0.19 -0.22 g H2O /g 13X which is typical of the adsorption isotherm for zeolite 13X and identical to the study conducted by Zhang et al, in which 0.18 -0.20 g H2O /g 13X of loading was measured by their experimental setup[59]. Based on an enthalpy of adsorption of 4.2 kJ/g H2O (1,800 BTU/lb H2O ) provided by the manufacturer in Appendix B, 20.2 to 22.7 kJ of heat per 25 g sample would be expected from this amount of loading.…”

supporting

confidence: 69%

“…By taking the area under the curves of Figure 4 The results of Figure 4.10 agree with observations made in the literature that the total amount of heat released from adsorption is independent of the concentration of water vapour at the inlet; Johannes et al [30] found that a higher outlet temperature and rate of discharge occurred for an inlet of 70% relative humidity than 50%, but the total energy released was the same. Similarly, Zhang et al [59] found that output power increased with relative humidity of 60 to 80% but the total energy released by adsorption for each test was within their experimental error of 11.4%. By comparing…”

Section: Discharge Rate and Thermal Energy Releasedmentioning

confidence: 72%

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An Experimental Evaluation of Fixed and Fluidized Beds of Zeolite 13X for the Application of Compact Thermal Energy Storage

Bardy¹

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For thermal energy storage technologies based on physical adsorption to become a commercially viable option in the future, particular advancements in the research and development of the system's components are required to complement existing research in advanced materials. To investigate the application of fluidization as a solid-gas contacting method for low-temperature thermochemical energy storage, a bench-scale adsorption-based TES system was designed, constructed, instrumented, and commissioned. In demonstrating this technology, the objective of this research was to obtain

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“…Open ATES cycles have been studied extensively because of their advantages such as the absence of hardware for the energy input and the rejection of the working fluids. Liu [60]. A temperature lift above 10 °C was able to achieve more than 7 h, with an energy density value of 191 kWh/m 3 , while the system efficiency was recorded to be 84.5-96.9%.…”

Section: Investigation Of Open Cyclesmentioning

confidence: 95%

Sorption-based Energy Storage Systems: A Review

Thu¹,

Nasruddin²,

Mitra³

et al. 2019

MST

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Mismatched timing between the supply and demand of energy calls for reliable storage systems. Energy storage systems have become further significant with the widespread implementation of renewable energy. These systems can mitigate problems that are often associated with renewable energy sources such as supply unreliability while meeting the demand during peak hours. Energy can be stored in various forms, yet storage systems can be generally grouped based on their output forms, namely (i) electricity and (ii) heat or thermal energy. Electrical energy is the most convenient and effective form since it can power almost all modern devices. However, the electricity itself is vastly produced by thermodynamic cycles at a particular thermal efficiency using thermal energy from fossil fuels. Meanwhile, thermal energy for the HVAC&R and the production of hot water remains the largest portion of the building energy sector. Thermal energy can be stored in the form of sensible, latent, and thermochemical energy. This review focuses on thermochemical sorption-based energy storage systems. These systems exploit endothermic and exothermic sorption processes for charging and discharging of the thermal energy. Sorption-based storage systems exhibit huge potential due to a high energy density and their ability to store the energy at room temperature. We discuss the current state-of-the-art developments, key challenges, and future prospects of sorption-based energy systems.

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Experimental investigation on an open sorption thermal storage system for space heating

Cited by 49 publications

References 25 publications

Morphological and Structural Evaluation of Hydration/Dehydration Stages of MgSO4 Filled Composite Silicone Foam for Thermal Energy Storage Applications

Morphological and Structural Evaluation of Hydration/Dehydration Stages of MgSO4 Filled Composite Silicone Foam for Thermal Energy Storage Applications

An Experimental Evaluation of Fixed and Fluidized Beds of Zeolite 13X for the Application of Compact Thermal Energy Storage

Sorption-based Energy Storage Systems: A Review

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