Energy storage potential analysis of phase change material (PCM) energy storage units based on tunnel lining ground heat exchangers

Cao, Ziming; Zhang, Guozhu; Wu, Yuanhao; Yang, Jie; Sui, Yiming; Zhao, Xu

doi:10.1016/j.applthermaleng.2023.121403

Cited by 15 publications

(3 citation statements)

References 52 publications

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“…Lastly, the availability of the PCM is important to ensure that it can be readily sourced for maintenance and repair purposes. Considering all those factors, the most suitable PCM can be selected for integration into heat exchangers for enhanced utilization of VRE [8][9][10][11][12].…”

Section: Types Of Pcmsmentioning

confidence: 99%

“…However, salt hydrates can absorb moisture from the air, leading to potential issues with caking and degradation over time. Despite this, their availability and cost-effectiveness make them attractive PCM candidates for medium to large-scale applications [11,12,15]. For instance, sodium sulfate decahydrate has a lower latent heat of fusion, ranging from 50 to 150 J/g, but exhibits higher thermal conductivity values, typically between 0.5 and 2.5 W/m K. This makes them more suitable for applications requiring rapid heat transfer.…”

Section: Types Of Pcmsmentioning

confidence: 99%

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Integration of Phase Change Materials in Advancing Heat Exchangers for Enhanced Utilization of Variable Renewable Energy

Alamnia

2024

Innovative Heat Exchanger Technologies, Developments and Applications

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Variable renewable energy sources, such as solar and wind power, play a crucial role in sustainable energy systems. However, their intermittent nature poses challenges for maintaining a consistent energy supply. This chapter outlines a research initiative that focuses on the integration of phase change materials (PCMs) within heat exchangers to address these challenges. PCMs, known for their thermal energy storage capabilities, can enhance the efficiency and reliability of renewable energy systems by providing a means to store excess energy during peak generation periods. The chapter aims to explore the synergies between PCMs and heat exchangers, with the goal of optimizing the utilization of variable renewable energy. Through meticulous surveys and integration, this chapter endeavor seeks to overcome the intermittent limitations of renewable energy sources, fostering a more robust and dependable framework for sustainable energy.

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Section: Types Of Pcmsmentioning

confidence: 99%

Section: Types Of Pcmsmentioning

confidence: 99%

Integration of Phase Change Materials in Advancing Heat Exchangers for Enhanced Utilization of Variable Renewable Energy

Alamnia

2024

Innovative Heat Exchanger Technologies, Developments and Applications

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“…In addition, phase-change materials are also used to support low-temperature geothermal systems as high-density heat storage reservoirs. The research described in [ 20 ] shows that combining paraffin mixtures as PCMs in ground heat exchanger (GHE) systems results in a 77.8% improvement in heat storage efficiency when the thermal conductivity of the system is increased by 1 W/m and the melting point of the PCMs by 4 °C.…”

Section: Introductionmentioning

confidence: 99%

Multi-Faceted Analysis of Phase-Change Composite Intended for Autonomous Buildings

Musiał,

Lichołai

2024

Materials

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This paper presents the long-term, holistic results of research into an innovative heat accumulator based on an organic phase-change material in the form of a mixture of aliphatic alkanes, molecular silica sieves, carbon recyclate and epoxy and cement matrices. The research included chemical testing of vacuum soaking of molecular silica sieves with a liquid phase-change material. The results proved an improvement in the heat storage efficiency of the heat accumulators due to the addition of carbon recyclate by 28%, while increasing the heat storage time by 134 min, and a reduction in PCM leakage due to the use of molecular silica sieves. In addition to its cognitive scientific value, another research objective of the work achieved was to obtain response functions in the form of approximating polynomials. They provide a useful, validated and verified tool to predict the physical and chemical characteristics of heat accumulators with different contents of individual components. As part of the ongoing research, technical problems related to leak-proofing assurance and matrix selection for organic phase-change materials were also solved. The solution presented is in line with the issues of efficient use of renewable energy, low-carbon and energy-efficient circular economy.

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Improving Wastewater Heat Recovery Using Phase Change Material Heat Exchangers: A Numerical Study of Thermal Performance

Patel,

Rathod

2024

Energy Storage

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Industrial processes often generate substantial amounts of wastewater with significant thermal energy content, which is typically discarded as waste. A promising approach to increase energy efficiency and advance sustainable resource management is waste water heat recovery. Utilizing a phase change material (PCM) to extract waste heat from wastewater and transfer it to cold water is an innovative method that separates the demand and supply of heat, while also integrating storage and transmission within a single heat exchanger (HE). A 3D numerical model of PCM‐based HE is developed and simulated. The thermal behavior of PCM and preheating of cold water are investigated in this study. In order to increase the thermal conductivity of the PCM, fins are strategically positioned. Around 71.13% of melting time is reduced by adding fins. Further, the 10° orientation of the fins is also numerically observed and it is found that it helps to improve natural circulation of molten PCM. Thus, melting time is reduced by 34% compared to the vertical fin. A 3.5°C–4.5°C temperature rise in cold water is obtained with the inclined fin, which is 14.28% higher than the vertical fin model.

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Energy storage potential analysis of phase change material (PCM) energy storage units based on tunnel lining ground heat exchangers

Cited by 15 publications

References 52 publications

Integration of Phase Change Materials in Advancing Heat Exchangers for Enhanced Utilization of Variable Renewable Energy

Integration of Phase Change Materials in Advancing Heat Exchangers for Enhanced Utilization of Variable Renewable Energy

Multi-Faceted Analysis of Phase-Change Composite Intended for Autonomous Buildings

Improving Wastewater Heat Recovery Using Phase Change Material Heat Exchangers: A Numerical Study of Thermal Performance

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