Study of the Phase-Change Thermal-Storage Characteristics of a Solar Collector

Deng, Yuxuan; Xu, Jing; Li, Yanna; Kuang, Chunyan

doi:10.3390/ma15217497

Cited by 4 publications

(7 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Within this chamber, a blend of PCM and air was introduced. Our previous research indicated that an 80% PCM concentration resulted in optimal energy storage efficiency ( Deng et al, 2022 ). The system efficiently captures solar energy, directing it towards the bottom and central conduit, which consequently facilitates the PCM transition from solid to liquid, enhancing solar energy storage.…”

Section: Methodsmentioning

confidence: 99%

Impact of solar-driven heating strategies on the phase change thermal storage performance of erythritol

Deng,

Zhen,

Zhu

et al. 2024

Front. Chem.

Self Cite

View full text Add to dashboard Cite

With escalating energy demands, solar power stands out for its abundance and renewable advantages, presenting a paramount sustainable solution. Herein, we tactically incorporate phase change material (PCM) into solar energy systems, resulting in substantial enhancements in energy storage and utilization. Through numerical simulations, the thermal dynamics and phase change processes associated with various heating methodologies are investigated, aiming to achieve optimal thermal performance and energy efficiency. Detailed analysis of temperature dynamics within the PCM under two distinct heating methods reveals pivotal thermal fluctuations in both the PCM and water during heat release. The results indicate that bottom heating promptly induces rayleigh convection, resulting in a uniform temperature and a stable phase interface, which are desirable for heat transfer. In contrast, central tube heating concentrates heat transfer in the upper PCM layer, leading to an uneven phase interface and thermal stratification. Configurations with two horizontally aligned heating tubes result in a 36% reduction in melting duration compared to the single central tube setup, highlighting enhanced efficiency. Additionally, the bottom heating approach demonstrates improved energy storage efficiency in both the initial and second heating cycles. These findings highlight the potential of PCM-integrated combined heating systems for solar energy capture, confirming their efficiency and practicality in addressing modern household energy demands.

show abstract

Section: Methodsmentioning

confidence: 99%

Impact of solar-driven heating strategies on the phase change thermal storage performance of erythritol

Deng,

Zhen,

Zhu

et al. 2024

Front. Chem.

Self Cite

View full text Add to dashboard Cite

show abstract

“…The potential for obtaining eutectic mixtures is vast, as each addition expands the temperature range of the phase change compounds (PCM). Table 8 provides an overview of the most-used eutectic types along with their corresponding eutectic points [49][50][51][52][53]. the phase change compounds (PCM).…”

Section: Eutectic Typementioning

confidence: 99%

“…the phase change compounds (PCM). Table 8 provides an overview of the most-used eutectic types along with their corresponding eutectic points [49][50][51][52][53]. The most promising method that has been considered for latent heat storage is the utilization of molten salt mixtures as phase-change materials [54]: the study focused on the binary salt mixture of lithium chloride-lithium hydroxide (LiCl-LiOH) as a potential phase-change material for thermal energy storage.…”

Section: Eutectic Typementioning

confidence: 99%

Latest Advances in Thermal Energy Storage for Solar Plants

Barrasso,

Langella,

Amoresano

et al. 2023

Processes

View full text Add to dashboard Cite

To address the growing problem of pollution and global warming, it is necessary to steer the development of innovative technologies towards systems with minimal carbon dioxide production. Thermal storage plays a crucial role in solar systems as it bridges the gap between resource availability and energy demand, thereby enhancing the economic viability of the system and ensuring energy continuity during periods of usage. Thermal energy storage methods consist of sensible heat storage, which involves storing energy using temperature differences; latent heat storage, which utilizes the latent heat of phase change materials; and thermochemical heat storage, which utilizes reversible chemical reactions through thermochemical materials. The objective of this review paper is to explore significant research contributions that focus on practical applications and scientific aspects of thermal energy storage materials and procedures. For each type of storage, different materials have been examined, taking into consideration the most recent studies, both for medium and long-term storage and, when possible, comparing methodologies for the same purpose. It has been observed that TCHS systems have the potential to reduce the volume of chemical storage tanks by 34 times using chemical reactions. Among the SHS materials, water, molten salts, and graphite exhibit the highest energy density, with graphite also possessing remarkable thermal conductivity. Nanoparticles can enhance the thermophysical properties of TES materials by increasing their thermal conductivity and wettability and improving intermolecular characteristics. The use of biobased PCMs for applications that do not require very high temperatures allows for maximizing the efficiency of such storage systems.

show abstract

“…Different studies have been performed to observe the impact of container tilt angle on the performance of PCM-based TESU [ 23 , 24 , 25 , 26 ]. Babak Kamkari et al [ 23 ] investigated the impact of different inclination angles of the PCM container on the melting behavior of the PCM.…”

Section: Introductionmentioning

confidence: 99%

“…The maximum melting rate was observed for inclination angle of 45°. Yuxuan Deng et al [ 26 ] studied the thermal performance of erythritol-based LHTES utilizing solar heat.…”

Section: Introductionmentioning

confidence: 99%

Effect of Asymmetric Fins on Thermal Performance of Phase Change Material-Based Thermal Energy Storage Unit

et al. 2023

View full text Add to dashboard Cite

Phase change material (PCM)-based thermal energy storage units (TESU) have very low thermal conductivity that compromise their charging and discharging rate. The present study focuses on an enhancement in charging rate as well as an increase in the uniformity of the melting rate. A rectangular cavity consisting of two horizontal partial fins is studied. The horizontal partial fins are placed symmetrically in a PCM-based TESU. In the current work, the melting rate of PCM was enhanced using asymmetric arrangement while keeping all other parameters the same, thus showing the positive effect of asymmetric configuration in such storage systems. The position and the pitch of each fin is optimized to improve heat transfer characteristics of the TESU. The numerical investigation of the problem is performed. TESU with asymmetrically placed fins show better performance in terms of higher charging rate as well as uniformity of the charging rate. The asymmetric placement of the fins suggested by present study increased the charging rate by 74.3% on average as compared to the symmetrically placed fins in the storage system. The charging rate uniformity is improved by 43.7%. The asymmetric fin’s placement conserved the convection strength for a longer melting duration and so increased the Nusselt number by 80.2% as compared to the symmetrically placed fins. Thus, it can be concluded that the performance of asymmetric fins is better in the charging of PCMs than the symmetrically placed fins in a PCM-based TESU.

show abstract

Study of the Phase-Change Thermal-Storage Characteristics of a Solar Collector

Cited by 4 publications

References 31 publications

Impact of solar-driven heating strategies on the phase change thermal storage performance of erythritol

Impact of solar-driven heating strategies on the phase change thermal storage performance of erythritol

Latest Advances in Thermal Energy Storage for Solar Plants

Effect of Asymmetric Fins on Thermal Performance of Phase Change Material-Based Thermal Energy Storage Unit

Contact Info

Product

Resources

About