Hybrid paper membranes incorporated with carbon and phase change materials for improved thermal performance

IF 6.9 2区 工程技术 Q2 ENERGY & FUELS
Yongjun Choi, Ji Yong Choi, Young Uk Kim, Sumin Kim
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引用次数: 0

Abstract

Energy recovery ventilators (ERVs) are essential for improving indoor air quality (IAQ) and reducing energy consumption. However, conventional membranes often lack thermal storage capability and long-term durability. This study developed a composite paper membrane by impregnating a pulp-derived corrugated substrate with n-octadecane-based phase change material (PCM) and carbon additives, including carbon nanotubes (CNTs), exfoliated graphite nanoplatelets (xGnP), graphene, and activated carbon (AC), to enhance thermal regulation and moisture permeability. Thermal conductivity measurements, differential scanning calorimetry, thermogravimetric analysis, Fourier-transform infrared spectroscopy, scanning electron microscopy, and dynamic thermal tests were conducted for performance evaluation. The results show that PCM integration significantly improved the composite paper membranes, which exhibited a latent heat storage equivalent to 68 % of the latent heat value of pure PCM. Carbon additives improved heat transfer efficiency and increased thermal conductivity, promoting uniform temperature distribution during heating and cooling cycles. Moisture permeability was maintained, with Sd values below 1 m, meeting ISO 12572 standards for breathable membranes. Durability evaluation through 1,000 thermal cycles, equivalent to approximately three years of ERV operation, confirmed consistent latent heat capacity and structural integrity. Dynamic testing also demonstrated a slower cooling rate and reduced heat dissipation, indicating the potential of these membranes to buffer indoor environments under variable outdoor conditions. The PCM–carbon composite paper membrane provides a cost-effective and environmentally sustainable alternative to polymer-based ERV membranes, offering dual functionality—moisture control and thermal energy storage—while improving ventilation performance and contributing to low-emission building technologies.
混合纸膜结合碳和相变材料,以提高热性能
能量回收通风机(erv)是改善室内空气质量和降低能源消耗的关键。然而,传统的膜通常缺乏储热能力和长期耐用性。本研究通过在纸浆衍生的波纹基材上浸渍n-十八烷基相变材料(PCM)和碳添加剂(包括碳纳米管(CNTs)、剥离石墨纳米片(xGnP)、石墨烯和活性炭(AC)),开发了一种复合纸膜,以增强热调节和透湿性。热导率测量、差示扫描量热法、热重分析、傅里叶变换红外光谱、扫描电子显微镜和动态热测试进行了性能评估。结果表明,PCM集成显著改善了复合纸膜的潜热储量,其潜热储量相当于纯PCM潜热值的68%。碳添加剂提高了传热效率,增加了导热系数,在加热和冷却循环中促进了均匀的温度分布。保持透湿性,Sd值小于1 m,符合ISO 12572透气膜标准。通过1000次热循环,相当于大约三年的ERV运行,耐久性评估确认了一致的潜热容量和结构完整性。动态测试也显示出更慢的冷却速度和更少的散热,表明这些膜在可变室外条件下缓冲室内环境的潜力。pcm -碳复合纸膜为聚合物基ERV膜提供了一种具有成本效益和环境可持续性的替代品,具有双重功能-湿度控制和热能储存-同时改善通风性能并有助于低排放建筑技术。
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来源期刊
Applied Thermal Engineering
Applied Thermal Engineering 工程技术-工程:机械
CiteScore
11.30
自引率
15.60%
发文量
1474
审稿时长
57 days
期刊介绍: Applied Thermal Engineering disseminates novel research related to the design, development and demonstration of components, devices, equipment, technologies and systems involving thermal processes for the production, storage, utilization and conservation of energy, with a focus on engineering application. The journal publishes high-quality and high-impact Original Research Articles, Review Articles, Short Communications and Letters to the Editor on cutting-edge innovations in research, and recent advances or issues of interest to the thermal engineering community.
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