Description and Analysis of Adsorption Heat Storage Device

Stritih, Uroš; Bombač, Andrej

doi:10.5545/sv-jme.2014.1814

Cited by 12 publications

(6 citation statements)

References 22 publications

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“…The authors therefore declared the working pair silica gel-H 2 O as unsuitable for solar energy storage systems for building applications. Stritih and Bombač [30] came to the same conclusion with a similarly designed closed storage unit prototype with silica gel-H 2 O working pair, but on a smaller scale (5.7 kg of silica gel).…”

Section: Closed Systemsmentioning

confidence: 54%

Technologies for Seasonal Solar Energy Storage in Buildings

Stritih¹,

Mlakar²

2018

Advancements in Energy Storage Technologies

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Thermochemical heat storage is a very promising technology that enables us to save the excess heat produced during summer time for the needs in the winter, when we have higher heating needs. Thermochemical heat storage bases and an overview of thermochemical materials (TCMs), suitable for the solar energy storage, are given. Choosing a suitable adsorbent and adsorbate is very important. The most important properties of the substance are high energy density for high thermal storage, low charging temperature for low energy consumption, high uptake of sorbate kg(sorbate)/kg(sorbent) and environmental safety and easy to handle-nonpoisonous. The paper also presents the differences between the closed and the open sorption system. The biggest difference between those two systems is the importance of sorbent, which in case of open systems means that sorbent must be environmentally friendly. Also, various closed and open systems are presented.

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Section: Closed Systemsmentioning

confidence: 54%

Technologies for Seasonal Solar Energy Storage in Buildings

Stritih¹,

Mlakar²

2018

Advancements in Energy Storage Technologies

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“…Hence, heat storage systems based on sorption processes present the advantage of having: a large range of operating temperatures, depending on the chosen working pair; a larger heat storage density with respect to sensible and latent heat storage; negligible heat losses during the storing period, which makes them particularly suitable for long-term energy storage (Stritih and Bombač, 2014). Owe to these peculiar properties, and to the large range of potential applications, several working pairs have been extensively investigated: for example, sorbents like silica gel, zeolite, metal-organic framework or hygroscopic salts; sorbates as water or organic solvents (Scapino et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Water/Ethanol and 13X Zeolite Pairs for Long-Term Thermal Energy Storage at Ambient Pressure

et al. 2019

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Thermal energy storage is a key technology to increase the global energy share of renewables-by matching energy availability and demand-and to improve the fuel economy of energy systems-by recovery and reutilization of waste heat. In particular, the negligible heat losses of sorption technologies during the storing period make them ideal for applications where long-term storage is required. Current technologies are typically based on the sorption of vapor sorbates on solid sorbents, requiring cumbersome reactors and components operating at below ambient pressure. In this work, we report the experimental characterization of working pairs made of various liquid sorbates (distilled water, ethanol and their mixture) and a 13X zeolite sorbent at ambient pressure. The sorbent hydration by liquid sorbates shows lower heat storage performance than vapor hydration; yet, it provides similar heat storage density to that obtainable by latent heat storage (40-50 kWh/m 3) at comparable costs, robustness and simplicity of the system, while gaining the long-term storage capabilities of sorption-based technologies. As a representative application example of long-term storage, we verify the feasibility of a sorption heat storage system with liquid sorbate, which could be used to improve the cold-start of stand-by generators driven by internal combustion engines. This example shows that liquid hydration may be adopted as a simple and low-cost alternative to more efficient-yet more expensive-techniques for long-term energy storage.

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“…Closed systems can be described more precisely as an empty or airless system where the working pressure of the adsorbed medium can be adjusted. Closed systems are different from the open system by one characteristic, which is that their components are not in the direct contact with the atmosphere and they are less harmful to the environment as open systems . In both cases described in this research, we used a closed‐sorption process, in numerical simulations, as well as in an experiment.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical analysis of seasonal solar‐energy storage in buildings

et al. 2019

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Summary This paper presents seasonal‐energy storage of solar energy for the heating of buildings. We distinguish several types of seasonal storage, such as latent, sensible, and chemical storage, among which the thermochemical storage is used and analysed in this research. In the first part, a laboratory heat‐storage tank, which was made in the laboratory for heating, sanitary, and solar technology and air conditioning from the Faculty of Mechanical Engineering, University of Ljubljana, Slovenia, was presented. The experimental model was tested for charging and discharging mode. Two types of numerical models for sorption thermal‐energy storage exist, which are microscale and macroscale (integral). For microscale analysis, the analysis system (ANSYS) model can be used to simulate the behaviour in the adsorption reactor. On macroscale or integral scale, TRaNsient SYStem (TRNSYS) model was used to perform the operation of the storages on the yearly basis. In the second part the simulation of the underfloor heating system operation with a built‐in storage tank was carried out for two locations, Ljubljana and Portorož. Furthermore, the comparison between a thermochemical and sensible‐heat storage was performed with TRNSYS and Excel software. In this comparison, the focus was on the surface parameters of the SCs and volume of the thermal‐storage tank for the coverage of the energy demand for selected building. With this analysis, we would like to show the advantage of the thermochemical storage system, to provide greater coverage of the energy demand for the operation of the building, compared with the seasonal sensible‐heat storage (SSHS). Such a heat‐storage technology could, in the future, be a key contributor to the more environmentally friendly and more sustainable way of delivering energy needs for buildings.

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Description and Analysis of Adsorption Heat Storage Device

Cited by 12 publications

References 22 publications

Technologies for Seasonal Solar Energy Storage in Buildings

Technologies for Seasonal Solar Energy Storage in Buildings

Water/Ethanol and 13X Zeolite Pairs for Long-Term Thermal Energy Storage at Ambient Pressure

Experimental and numerical analysis of seasonal solar‐energy storage in buildings

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