The enhanced thermal energy storage efficiency of the bionic-conch is attributed to the spiral fins within, which considerably amplify the heat exchange surface
بیشتر بخوانیدLatent heat thermal energy storage (LHTES) technology can store thermal energy in the form of latent heat in PCM (Liu et al., 2016, Tao and He, 2018). LHTES has the advantage of large thermal energy storage density with smaller temperature swing due to high latent heat and phase change at a constant temperature (Abedin and Rosen,
بیشتر بخوانیدMesalhy et al. [39] numerically studied the melting process in irregular geometry and found that use of a porous matrix increases melting and energy storage rate in PCM. They also found that with decrease in porosity the melting rate is increased although natural convection is suppressed.
بیشتر بخوانیدThe design and simulation of large scale PCM-based melting processes are of great interest to develop industrial latent thermal energy storage unit. Besides, it is necessary to understand the thermal behavior of PCMs, i.e. heat transfer, in large scale processes, in which the reactor shape, the number and size of pipes and their
بیشتر بخوانیدLatent heat storage using alloys as phase change materials (PCMs) is an attractive option for high-temperature thermal energy storage. Encapsulation of these
بیشتر بخوانیدExplicitly, understanding the transient melting behaviour of a PCM is paramount to increasing efficiency and reducing the cost of Latent Heat Thermal Energy Storage (LHTES) [6]. This may be achieved through computational modelling to facilitate detailed predictions of PCM melting characteristics based on their individual
بیشتر بخوانیدAccelerated melting of PCM in energy storage systems via novel configuration of fins in the triplex-tube heat exchanger Int. J. Heat Mass Transf., 124 (2018), pp. 663-676 View PDF View article View in Scopus Google Scholar [17] H. Masoumi, R.,
بیشتر بخوانیدBiomimetic phase change capsules with conch shell structures for improving thermal energy storage efficiency. Jinqiu Yu, Xinjian Liu, Zhonghao Rao.
بیشتر بخوانیدTherefore, melting behavior of PCM is quite important for the thermal energy storage and release performance of TES system [3], [4], [5]. The thermophysical property of PCM is an important role, and most efforts are focused on the thermal conductivity [6], [7], [8].
بیشتر بخوانیدZEBRA batteries are typically built with a semisolid cathode, consisting of solid transition metal halides (e.g., NiCl 2, FeCl 2, and ZnCl 2) and a molten salt (i.e., NaAlCl 4, melting point of 157 °C), as shown in Figure 5.3. The molten NaAlCl 4 ensures facile sodium-ion transport between the BASE and the solid active materials in the cathode.
بیشتر بخوانیدenergy storage and thermal conductivity properties of Octadecanol-MWCNT composite 8.0, 7.3 and 7.8 J/g for melting of the CPCMs while the heat storage capacity was diminished by 7.1, 6.7, 8.4
بیشتر بخوانیدThe enhanced thermal energy storage efficiency of the bionic-conch is attributed to the spiral fins within, which considerably amplify the heat exchange surface area. Furthermore, in order to obtain the bionic-conch capsule structure with optimal thermal properties, the present work investigates the influence of fins on the melting
بیشتر بخوانیدHowever, due to the large porosity in the matrix after solidification, the heat storage of GSM is poor, resulting in the shortcomings of significant temperature fluctuation and energy waste. Phase change materials (PCMs) are potential candidates for increasing FRHS heat capacity due to their high enthalpy and relatively constant temperature during
بیشتر بخوانیدWhen the dimensionless time is 0.4576, it is found that the total melting time of the unit is reduced by 16.17 %, the average heat absorption rate is increased by 14.7 %, but the total heat energy absorption is reduced by 3.85 %.
بیشتر بخوانیدThis work concerns the development of a leaf-shaped longitudinal fin for the melting performance enhancement in a shell and tube thermal energy storage device. A two-dimensional code with the consideration of natural convection is established to simulate the phase transition process in phase change material (PCM), and the reliability is
بیشتر بخوانیدIt is seen that melting and energy storage rate is faster with convection which is shown by dotted lines in Fig. 12 (a)-(c). There is a significant temperature difference between the average temperature of metal foam and PCM as shown in Fig. 12 (d).
بیشتر بخوانیدAbstract. Phase change energy storage materials have been recognized as potential energy-saving materials for balancing cooling and heating demands in
بیشتر بخوانیدAccelerated melting of PCM in energy storage systems via novel configuration of fins in the triplex-tube heat exchanger International Journal of Heat and Mass Transfer, Volume 124, 2018, pp. 663-676 Jasim M. Mahdi, , Emmanuel C. Nsofor Show 3 more
بیشتر بخوانیدThe eight-fin storage system increases the daily charging capacity, thermal energy storage, thermal energy storage rate, and average effectiveness during melting by 146.0%, 133.8%, 123.5%, and 109.0%, respectively; while during solidification, the
بیشتر بخوانیدConsequently, it is essential to strike a balance between enhancing melting efficiency and maintaining energy storage capacity. Based on our study results, a fin volume fraction of 6 % is considered reasonable as it offers a comprehensive improvement in melting efficiency without compromising energy storage capacity.
بیشتر بخوانیدFurthermore, Fig. 18 presents the thermal energy storage capacity, the time for complete melting and the thermal energy storage efficiency of bionic-conch phase change capsules with different fin structures.
بیشتر بخوانیدThe enhanced thermal energy storage efficiency of the bionic-conch is attributed to the spiral fins within, which considerably amplify the heat exchange surface area. Furthermore, in order to obtain the bionic-conch capsule structure with optimal thermal properties, the present work investigates the influence of fins on the melting
بیشتر بخوانیدThey reported that the melting time of the proposed thermal energy storage unit decreased considerably compared to those of vertical, horizontal, and helical-coiled systems. Furthermore, the exergy efficiency of the proposed thermal storage unit was calculated and its value was the highest (0.77) compared to the other cases investigated.
بیشتر بخوانیدThis paper concerns enhancement of melting performance in a shell and tube thermal energy storage device containing different structures and materials. Four enhanced
بیشتر بخوانیدThe finned ice storage coils made of copper with the thermal conductivity of 401 W/mK were used in the experiments as indicated in Fig. 3.The outer diameter (d) of the coil was about 12.7 mm, the center distance between the upper, lower, left, and right coils was 75 mm, and fin properties including the fin height (h), the fin thickness (t), and
بیشتر بخوانیدPhase-change heat storage system contributes to the smooth operations of building energy supply and demand. In this paper, the numerical model of the heat-storage tank with phase change material blocks is established. The charge and discharge process of
بیشتر بخوانید8 Minute. On March 8, 2022, according to the announcement of Conch Cement''s new energy business investment plan, in 2022, the company will invest 5 billion yuan in the development of new energy businesses such as photovoltaic power stations and energy storage projects to achieve full coverage of photovoltaic power generation in its
بیشتر بخوانیدThe utilization and storage of low-carbon and renewable energy, such as solar energy, has received significant research attention [4], [5], [6]. Solar energy has been widely used in energy utilization and conversion because it
بیشتر بخوانیدThe melting patterns of a gallium inside an energy storage system were analyzed in a range of the Rayleigh numbers of 10 8 ≤ Ra ≤ 10 10. It was found that the melting of gallium had similar patterns when varying the Rayleigh number.
بیشتر بخوانیدThermal energy storage technology is of great significance for the efficient utilization of solar energy. In this paper, the melting process of a horizontal latent heat energy storage unit is studied by numerical method.Taguchi design method and response surface method are exploited to optimize its melting performance.
بیشتر بخوانیدChina deployed 533.3MW of new electrochemical energy storage projects in the first three quarters of 2020, an increase of 157% on the same period in 2019. According to work by the China Energy Storage Alliance''s (CNESA) in-house research group, the country
بیشتر بخوانیدA modified heat capacity method for unconstrained melting is developed. • The mushy zone constant should increase with the increased Ste number. • The thickness of the molten layer is less than 1 % of the capsule diameter. •
بیشتر بخوانیدAs an important part of the cold storage air conditioning system, an efficient cold thermal energy storage (CTES) device is the key to ensure the efficient operation of the system. However, the thermal conductivity of most cold storage media is relatively low, which limits their heat transfer performance [4], [5] .
بیشتر بخوانیدAmong metallic PCMs, Sn is often used as energy storage medium in high temperature energy storage systems [16] because of its proper melting point of about 232 C and large latent heat of 58.5 J/g [17]. Cu is an excellent additive commonly used in
بیشتر بخوانیدBlen et al. (2008) experimentally studied the melting and solidification characteristics of CaCl 2 .6H 2 O as the PCM in a vertical double concentric tube energy storage system. They investigated
بیشتر بخوانیدThe enhanced thermal energy storage efficiency of the bionic-conch is attributed to the spiral fins within, which considerably amplify the heat exchange surface area.
بیشتر بخوانیدThe PCM has a high energy storage density but its low thermal conductivity reduces its melting. The present study uses three heat transfer fluid (HTF) flow configurations, outer, inner, and combined flow (inner and outer), with gradually decreasing PCM capsule sizes, to expedite melting in a horizontal cylindrical thermal energy
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