heat storage tube
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Latent heat thermal energy storage in a shell-tube design: Impact …
Using a shell-tube shape, Fig. 2 depicts the design of a Latent Heat Thermal Energy Storage (LHTES) device. The heat transfer fluid, water, enters the tube at a pressure of P in and leaves at the top outlet at zero pressure. The wall thickness of the tube is t, and its outer radius is R.
يتعلم أكثرLatent heat thermal energy storage in a shell-tube: A wavy partial ...
A schematic view of a shell-tube latent heat thermal energy storage unit is depicted in Fig. 1. As seen, a bundle of tubes is packed inside a shell enclosure. Inside, the enclosure is filled with PCM. A wavy layer of open-cell metal foam is placed over tubes in which the PCM fills the porous pores. A wavy surface has been used in structural ...
يتعلم أكثرOn the use of finned flat-tube heat exchangers for adsorptive heat ...
1. Introduction. Adsorption heat transformation and storage (AHTS) is an energy-saving technology, which allows heat from renewable sources (solar, geothermal, etc.) and waste heat to be stored and transformed into useful heat and cold [[1], [2], [3]].Although many AHTS units, mainly adsorptive chillers (ACs), are available on the …
يتعلم أكثرAccelerated charging dynamics in shell-and-multi-tube latent heat ...
The heat exchanger equipped with tubes at 70 °C exhibits a significantly shorter charging time of 121 % and 36.2 % and a notably higher heat storage rate of 135 % and 40.8 % compared to heat exchangers with tubes initial temperature of 50 °C and 60 °C.
يتعلم أكثرPerformance enhancement of triplex-tube heat storage unit …
Effect of perforated fins on the heat-transfer performance of vertical shell-and-tube latent heat energy storage unit J. Storage Mater., 39 (2021), Article 102647 View PDF View article View in Scopus Google Scholar …
يتعلم أكثرNumerical investigation of the influence of unsteady inlet temperature on heat storage performance of a novel bifurcated finned shell-tube heat ...
Fig. 1 depicts a schematic view of the shell-tube heat storage tank equipped with novel bifurcated fins. The HTF (high-temperature water) enters the tank from the top, flows out from the bottom, and exchanges heat with the PCM (paraffin) when passing through the inner tube.
يتعلم أكثرThermal storage performance of a novel shell-and-tube latent heat ...
This study presents a numerical analysis of the melting process in a shell-and-tube latent heat thermal energy storage (LHTES) system, featuring a twisted elliptical inner tube with annular fins. Utilizing paraffin as the phase change material (PCM) and water as the heat transfer fluid (HTF), this research examines the impact of varying twist ...
يتعلم أكثرMelting characteristics of concentric and eccentric inner elliptic tube in double tube latent heat energy storage …
The physical model of the current work is the double-pipe LHTES unit which consists of a circular inner tube with a diameter of 23 mm, an outer diameter of 70 mm, and a unit storage length of 1000 mm as shown in Fig. 1 a which is selected from [47].The inner tube ...
يتعلم أكثرOptimizing diverse triplex-tube heat storage systems with …
Fig. 1 illustrates a three-dimensional schematic representation of the triplex-tube heat exchanger (TTHX) under investigation. The inner and middle tubes have diameters of 50.8 mm (d i) and 150 mm (d o), respectively (Fig. 2).A heat transfer fluid (HTF) is continuously pumped through the innermost and outermost tubes to induce the …
يتعلم أكثرEmploying spiral fins to improve the thermal performance of phase-change materials in shell-tube latent heat storage …
This study presents a numerical analysis of the melting process in a shell-and-tube latent heat thermal energy storage (LHTES) system, featuring a twisted elliptical inner tube with annular fins. Utilizing paraffin as the …
يتعلم أكثرAnalysis of melting and solidification performance of bionic snowflake fin horizontal Triplex-tube latent heat storage …
As shown in Fig. 1, snowflakes are designed into fins through bionic optimization, and they are embedded between three-tube heat exchangers for heat storage.To further optimize the analysis by the means of a simplified model, on the basis of the study by Huang [39] et al. on three casing, thus simplifying the research into a two …
يتعلم أكثرOn the use of finned flat-tube heat exchangers for adsorptive heat storage …
Heat exchanger (HEx) is the core of adsorptive heat transformation/storage units. • We study to what extent commercial finned flat-tube HExs are suitable for this. • Calculated thermal conductance TC is verified experimentally for 3 commercial HExs.This approach ...
يتعلم أكثرEvaluation and Optimization of the Thermal Storage ...
Adding fins to a shell-and-tube phase change thermal storage is a simple and effective way to enhance the performance of the phase change heat storage unit.
يتعلم أكثرStudy on heat storage performance of a novel bifurcated finned shell-tube heat storage …
Among all thermal energy storage technologies, latent heat storage (LHS) using phase change materials (PCMs) is more attractive due to its high heat storage and stable performance [7]. However, the low thermal conductivity of PCM leads to a very slow heat storage rate of LHS devices, which severely restricts the application of LHS …
يتعلم أكثرSolidification Enhancement in a Multi-Tube Latent Heat …
Free convection and the locations of the tubes carrying the heat-transfer fluid (HTF) have a significant influence on both the energy discharging potential and the buoyancy effect during the solidification …
يتعلم أكثرAnalysis of melting and solidification performance of bionic snowflake fin horizontal Triplex-tube latent heat storage …
Compared with the existing traditional heat storage devices, New multi-stage tube phase change heat accumulator reduces the time to complete melting by 34.4 %. At the same time, it is found that the gradual increase of …
يتعلم أكثرExperimental Analysis and Numerical Modeling of a Shell and Tube Heat Storage …
Thermal storages are part of highly integrated energy systems. The development of accurate and reduced models is critical for efficient simulations on a system-level and the analysis of the storage design, control, and integration. We present the experimental analysis and numerical modeling of a lab-scale shell and tube latent heat thermal …
يتعلم أكثرThermal Storage: From Low-to-High-Temperature Systems
Heat exchanger systems based on tubes and radiator plates with wire cloth and additional sheet structures for heat transfer enhancement, as well as metallic …
يتعلم أكثرStudy on design and thermal characteristics of vacuum tube solar ...
In this work, a heat storage vacuum tube solar collector intubated with heat storage tube is designed, which consists of solar vacuum tube, phase change material …
يتعلم أكثرThermal storage performance of a novel shell-and-tube latent heat ...
This study presents a numerical analysis of the melting process in a shell-and-tube latent heat thermal energy storage (LHTES) system, featuring a twisted …
يتعلم أكثرEffect of perforated fins on the heat-transfer performance of vertical shell-and-tube latent heat energy storage …
Considering both heat storage rate and heat storage capacity, we find that the heat storage power of the [email protected] is 22.38% higher than that of the pure ODA. Besides, the heat release power is 14. ...
يتعلم أكثرStudy on thermal storage performance of a novel conical spiral tube ...
A novel thermal storage model of conical spiral tubes has been proposed. Optimum tube conical ratio and tank taper have been obtained. With the increase of conical ratio, melting time is reduced by 18.75%. Increasing tank length-to-diameter ratio, heat storage efficiency enhances by 7.99%.
يتعلم أكثرHeat transfer of a shell and tube sodium acetate trihydrate heat ...
The heat storage unit was sealed by a flange on the top where both the extra expansion volume and the tube for dropping SAT crystals were located. The total height of the stainless steel storage unit is 1.7 m, and the external diameter is 0.4 m. Each tube has a height of 1.52 m and an inner diameter of 0.0276 m.
يتعلم أكثرEmploying spiral fins to improve the thermal performance of phase-change materials in shell-tube latent heat storage …
Effect of perforated fins on the heat-transfer performance of vertical shell-and-tube latent heat energy storage unit J. Energy Storage, 39 ( 2021 ), Article 102647, 10.1016/j.est.2021.102647 View PDF View article View in Scopus Google Scholar
يتعلم أكثرExperimental and numerical investigation of a rectangular finned-tube latent heat storage …
Numerical investigation and experimental validation of the thermal performance enhancement of a compact finned-tube heat exchanger for efficient latent heat thermal energy storage [J] J. Clean. Prod., 280 ( 2021 ), Article 124238
يتعلم أكثرPerformance evaluation of melting/solidification mechanism in a variable wave-length wavy channel double-tube latent heat storage …
Furthermore, the heat storage rate increase by 243% and 75%, respectively. This paper shows the importance of novel geometry modification techniques on the performance of double-tube heat storage units without affecting the PCM volume.
يتعلم أكثرMelting assessment on the angled fin design for a novel latent heat …
To further explore the influence of angled fins on the temperature changes in different areas of the vertical heat storage tube, Fig. 11 demonstrated the area-averaged temperature changes of S 1 –S 5 in the heat storage tube for all cases. Fig. 11 (a) depicted the temperature change of S 1. At the initial stage of melting, a smaller bending ...
يتعلم أكثرNumerical simulation study of the phase transition heat transfer of ...
The heat transfer equation Q = k F Δ t shows that three ways to improve the thermal conductivity of the PCM, increase the contact area between the PCM and the heat transfer fluid, and increase heat transfer temperature difference can effectively enhance the heat transfer effect of the PCM. Therefore, the unopened/8-hole heat storage tubes …
يتعلم أكثرExperimental analysis of a fin-enhanced three-tube-shell cascaded latent heat storage …
In order to improve the poor thermal conductivity of organic PCMs, a fin-enhanced three-tube-shell latent heat storage unit is proposed and applied to the CLHS configuration. Through a sensitivity and correlation analysis, the influence of boundary conditions on the thermodynamic performance of this CLHS system is determined.
يتعلم أكثرExperimental studies on evacuated tube collector with
The total energy stored in the sensible heat storage medium inside the evacuated tube during a time interval of 1800 s is expressed as (5) E s = m C p, medium T medium, j + 1 − T medium, j Where T medium,i is the temperature of storage medium at ith time and T medium,i+1 is the temperature of storage medium after an interval of 1800 s.
يتعلم أكثرThermal storage performance of a horizontal eccentric distance …
Fig. 1 presents a schematic diagram illustrating the flow pattern within a horizontal eccentric distance spiral tube HST during the process of heat storage. The HST is supplied with high-temperature hot water from the left side, which then exits from the right side. Within the HST, the area between the spiral heat exchanger tube and the shell is …
يتعلم أكثرExperimental investigations of high-temperature shell and multi-tube latent heat storage …
Numerical and experimental study of heat transfer characteristics of a shell-tube latent heat storage system: Part I – Charging process Energy, Volume 79, 2015, pp. 337-350 X. Xiao, P. Zhang
يتعلم أكثرThermal energy storage
District heating accumulation tower from Theiss near Krems an der Donau in Lower Austria with a thermal capacity of 2 GWh Thermal energy storage tower inaugurated in 2017 in Bozen-Bolzano, South Tyrol, Italy. Construction of the salt tanks at the Solana Generating Station, which provide thermal energy storage to allow generation during night or peak …
يتعلم أكثرInvestigation and optimization on melting performance of a triplex …
Phase change heat storage is the backbone of energy storage technology, but its storage time is affected by the low thermal conductivity of phase …
يتعلم أكثرIntensifying the thermal response of PCM via fin-assisted foam strips in the shell-and-tube heat storage …
The PCM-based shell-and-tube heat storage system with fin-foam strips is simplified into a two-dimensional module for numerical solution and optimization. As shown in Fig. 1, the system includes two concentrically mounted aluminium tubes with internal and external diameters of 25 mm and 75 mm, respectively, with a 1.2 mm thick wall.
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