Properties modification and thermal performance assessment of a Na2SO4·10H2O phase change material slurry

YUE Xinru; ZHENG Ruiyun; LIN Wenye; GUO Hongfan; SONG Wenji; FENG Ziping; HE Zixuan

doi:10.19799/j.cnki.2095-4239.2026.0028

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Properties modification and thermal performance assessment of a Na₂SO₄·10H₂O phase change material slurry

Special Issue on Multi\-Scenario Applications of Thermal and Cold Energy Storage | 更新时间：2026-07-01

- Properties modification and thermal performance assessment of a Na₂SO₄·10H₂O phase change material slurry
- Energy Storage Science and Technology Vol. 15, Issue 3, Pages: 713-722(2026)
- 作者机构：
  
  1.沈阳化工大学化学工程学院，辽宁沈阳 110142
  2.中国科学院广州能源研究所，广东广州 510640
  3.广东工业大学土木与交通工程学院，广东广州 510006
- 作者简介：
- 基金信息：
- DOI：10.19799/j.cnki.2095-4239.2026.0028
  CLC： TB 34
- Received：08 January 2026，
  
  Revised：2026-02-11，
  
  Published：28 March 2026
- 稿件说明：
移动端阅览
岳心如, 郑瑞云, 林文野, 等. Na₂SO₄·10H₂O相变浆体的改性优化与热性能评估[J]. 储能科学与技术, 2026, 15(3): 713-722. DOI: 10.19799/j.cnki.2095-4239.2026.0028.

YUE Xinru, ZHENG Ruiyun, LIN Wenye, et al. Properties modification and thermal performance assessment of a Na₂SO₄·10H₂O phase change material slurry[J]. Energy Storage Science and Technology, 2026, 15(3): 713-722. DOI: 10.19799/j.cnki.2095-4239.2026.0028.
岳心如, 郑瑞云, 林文野, 等. Na₂SO₄·10H₂O相变浆体的改性优化与热性能评估[J]. 储能科学与技术, 2026, 15(3): 713-722. DOI: 10.19799/j.cnki.2095-4239.2026.0028. DOI：

YUE Xinru, ZHENG Ruiyun, LIN Wenye, et al. Properties modification and thermal performance assessment of a Na₂SO₄·10H₂O phase change material slurry[J]. Energy Storage Science and Technology, 2026, 15(3): 713-722. DOI: 10.19799/j.cnki.2095-4239.2026.0028. DOI：

摘要

为了解决无机水合盐相变浆体中水合盐晶粒生长和沉降带来的流动堵塞和稳定性恶化问题，本研究通过晶粒形貌观测、静态吸附浓度测量法和静置沉降实验，探究不同添加剂对十水硫酸钠相变浆体流动性和稳定性的影响。对比实验获得了最佳表面活性剂和增稠剂添加量，并基于此制备得到含30%硫酸钠、4%十水四硼酸钠、0.2%十六烷基三甲基氯化铵和0.1%聚丙烯酰胺的改性优化相变浆体。通过T-history法及流动传热测试获得了改性优化十水硫酸钠相变浆体的热力学及流动传热性能，发现所制备的相变浆体在27～32℃温度区间的有效储能密度达到131.45 J/g，是同温区内水储能密度的约6.3倍。此外，为构建十水硫酸钠相变浆体的流动传热特性模型以支撑其在冷/热热储运中的工程应用，研究还回归拟合了不同流态下流动摩擦阻力和平均努塞尔数经验关联式，获得了较高的拟合优度(

达0.91～0.98)。本研究的相关成果对无机水合盐相变浆体的优化制备和应用推广具有实际意义。

Abstract

To address the flow blockage and segregation of sodium sulfate decahydrate based phase change material slurries

this study investigated the influence of different additives on their fluidity and stability through crystal morphology observation

static adsorption concentration measurement

and static sedimentation experiments. Comparative experiments identified the optimal amounts of surfactants and stabilizers

leading to the formulation of a modified Na

·10H

O phase change material slurry containing 30% base salt

4% sodium tetraborate decahydrate

0.2% cetyltrimethylammonium chloride

and 0.1% polyacrylamide. Its thermodynamic properties

as well as flow and heat transfer characteristics

were then measured using T-history method and a hydraulic and heat transfer test rig. It was found that the Na

·10H

O phase chang

e material slurry exhibited an effective thermal energy storage density of 131.45 J/g over the temperature range of 27—32℃

which is 6.3 times that of water over the same temperature range. Furthermore

to support the application of the Na

·10H

O phase change material slurry in engineering piping systems based on its flow and heat transfer characteristics

hydraulic and heat transfer correlations for the friction factor and average Nusselt number were developed

achieving high coefficients of determination (

² from 0.91 to 0.98) for laminar and turbulent flow regimes. The above findings are beneficial for the optimal development and practical deployment of salt hydrate phase change material slurries.

关键词

Keywords

references

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