Investigation of the effect of geometric and operating parameters on thermal behavior of vertical shell-and-tube latent heat energy storage systems

Seddegh, Saeid; Wang, Xiaolin; Joybari, Mahmood Mastani; Haghighat, Fariborz

doi:10.1016/j.energy.2017.07.014

Cited by 129 publications

(25 citation statements)

References 37 publications

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“…Seddegh et al investigated the effect of different geometrical configurations of a shell‐and‐tube vertical cylinder thermal storage system. The performance of a storage system was analysed by varying the radius of the tube, which can influence the heat transfer rate.…”

Section: Latent Heat Storagementioning

confidence: 99%

Review on solar thermal energy storage technologies and their geometrical configurations

Suresh

Saini

2020

Int J Energy Res

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Summary Because of the unstable and intermittent nature of solar energy availability, a thermal energy storage system is required to integrate with the collectors to store thermal energy and retrieve it whenever it is required. Thermal energy storage not only eliminates the discrepancy between energy supply and demand but also increases the performance and reliability of energy systems and plays a crucial role in energy conservation. Under this paper, different thermal energy storage methods, heat transfer enhancement techniques, storage materials, heat transfer fluids, and geometrical configurations are discussed. A comparative assessment of various thermal energy storage methods is also presented. Sensible heat storage involves storing thermal energy within the storage medium by increasing temperature without undergoing any phase transformation, whereas latent heat storage involves storing thermal energy within the material during the transition phase. Combined thermal energy storage is the novel approach to store thermal energy by combining both sensible and latent storage. Based on the literature review, it was found that most of the researchers carried out their work on sensible and latent storage systems with the different storage media and heat transfer fluids. Limited work on a combined sensible‐latent heat thermal energy storage system with different storage materials and heat transfer fluids was carried out so far. Further, combined sensible and latent heat storage systems are reported to have a promising approach, as it reduces the cost and increases the energy storage with a stabilized outflow of temperature from the system. The studies discussed and presented in this paper may be helpful to carry out further research in this area.

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Section: Latent Heat Storagementioning

confidence: 99%

Review on solar thermal energy storage technologies and their geometrical configurations

Suresh

Saini

2020

Int J Energy Res

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“…In Equation (2), S is the momentum source term in the mushy zone based on the enthalpy–porosity approach, which takes the following form:

where the term

is the mushy zone constant reflecting the mushy zone morphology that illustrates how the velocity is reduced when the PCM solidifies. The constant

is a small number to prevent division by zero when T solid is greater than T [ 61 , 64 , 65 ]. The following parameters were utilized in the present study:

.…”

Section: Mathematical Modellingmentioning

confidence: 99%

Phase Change Process in a Zigzag Plate Latent Heat Storage System during Melting and Solidification

et al. 2020

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Applying a well-performing heat exchanger is an efficient way to fortify the relatively low thermal response of phase-change materials (PCMs), which have broad application prospects in the fields of thermal management and energy storage. In this study, an improved PCM melting and solidification in corrugated (zigzag) plate heat exchanger are numerically examined compared with smooth (flat) plate heat exchanger in both horizontal and vertical positions. The effects of the channel width (0.5 W, W, and 2 W) and the airflow temperature (318 K, 323 K, and 328 K) are exclusively studied and reported. The results reveal the much better performance of the horizontal corrugated configuration compared with the smooth channel during both melting and solidification modes. It is found that the melting rate is about 8% faster, and the average temperature is 4 K higher in the corrugated region compared with the smooth region because of the large heat-exchange surface area, which facilitates higher rates of heat transfer into the PCM channel. In addition to the higher performance, a more compact unit can be achieved using the corrugated system. Moreover, applying the half-width PCM channel accelerates the melting rate by eight times compared to the double-width channel. Meanwhile, applying thicker channels provides faster solidification rates. The melting rate is proportional to the airflow temperature. The PCM melts within 274 s when the airflow temperature is 328 K. However, the melting time increases to 460 s for the airflow temperature of 308 K. Moreover, the PCM solidifies in 250 s and 405 s in the cases of 318 K and 328 K airflow temperatures, respectively.

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“…The main objectives of most of the publications in literature were to develop the knowledge in this area to improve the design and performance of the thermal storage systems by improving the rate of heat transfer. A number of ideas were on enhancing the heat transfer to accelerate the charging and discharging of energy such as fins [1][2][3] or changing the dimension of the system such as outer radius/inner radius ratio and length/diameter ratio [4,5]. A summary of some recent publications on annular enclosure are given hereafter.…”

Section: Introductionmentioning

confidence: 99%

Melting/Solidification Processes of PEG 1500 in Vertical and Horizontal Annular Enclosure

Hamad¹,

Egelle²,

Mohammed³

et al. 2021

JEPT

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In this paper, the primary aim is to look at the fundamental melting/solidification processes of polyethylene glycol 1500 (PEG 1500) for energy storage – insulation to prolong the cooling time of pipelines in unexpected shut-down conditions, prevent/minimize the wax deposition, and hydrate formation. Polyethylene glycol 1500 was selected because its melting temperature is >317 K making it a suitable candidate as lagging material to prevent wax deposition and hydrate formation in subsea oil pipelines. Experimental apparatus was designed with the Perspex to give an insight into the melting process. Vertical and horizontal annular geometries were used to consider the real-life cases. The vertical annular enclosure length is 950 mm and 34 mm width (Height/Width=27.94). The horizontal annular enclosure length is 300mm and 15.9 mm width (Height/Width=18.87). The thermocouples and camera are used to collect the data for three cases of inner wall temperature of 333 K,343 K and 353 K where is the heat added to the phase change material (PCM) for both cases. The main conclusions are: i) the horizontal annular case melt faster than the vertical case, in particular, at higher heating surface temperature of 353 K, ii)The temperature of the inner region was remained hot for long time which provide a good evidence that support the concept of using the PCM as heat storage–insulation material; iii) the melting percentage for horizontal case is 100% higher from the melting percentage of vertical case at 333 K which reduced to about 20% for 343 K, iv) increasing the heating surface temperature substantially reduces the total melting time for both orientations.

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Investigation of the effect of geometric and operating parameters on thermal behavior of vertical shell-and-tube latent heat energy storage systems

Cited by 129 publications

References 37 publications

Review on solar thermal energy storage technologies and their geometrical configurations

Review on solar thermal energy storage technologies and their geometrical configurations

Phase Change Process in a Zigzag Plate Latent Heat Storage System during Melting and Solidification

Melting/Solidification Processes of PEG 1500 in Vertical and Horizontal Annular Enclosure

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