相变材料(PCM)集成太阳能热水系统的能量与火用分析

Adil A. M. Omara, Abuelnuor A. A. Abuelnuor, Muaaz A. A. Dafaallah, Abdalrahman M. A. Ali, Mustafa A. M. Alshoubli
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引用次数: 13

摘要

最近的预测预测,到2040年基本能源消耗将增加48%。这促使人们需要创造熟练和可持续的储能技术。太阳能热能可以通过适当的相变材料(PCMs)以潜热的形式储存,相变材料具有很高的储热能力。在喀土穆市夏季进行了平板集热器作为热源的PCM太阳能热水系统热性能试验研究。所使用的PCM为石蜡,其熔点为56℃。进行了能量和火用分析,评估了系统的热工性能,修复了能源系统的热力学缺陷。结果表明,PCM作为一种智能材料,可以将系统的温度调节在要求的范围内。结果表明,该系统的总能量和火用效率分别为85%和76%。生成的熵数为0.26。结果表明,PCM作为智能调节器,即使在没有热源的情况下也能保持系统的供热量。PCM还可以增加火用输出,减少火用破坏。这表明PCM可以提高火用效率。总体结果表明,PCM通过提高能源和火用效率来优化太阳能热水器系统的性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Energy and Exergy analysis of solar water heating system integrated with phase change material (PCM)
Recent projections anticipate that the essential energy consumption will increase by 48% in 2040. This has prompted to a need to create proficient and sustainable techniques of storing energy. Solar thermal energy can be stored in the form of latent heat by utilizing appropriate phase change materials (PCMs), which offer high heat storage capacity. An experimental study was done in Khartoum city during summer season to investigate the thermal performance of solar water heating system integrated with PCM using flat plate collector as a heat source. The PCM used was paraffin wax whose melting point is 56 °C. An energy and exergy analysis was done to assess the thermal performance of the system and fix the thermodynamic blemish in the energy system. The outcomes showed that PCM acted as smart material which can regulate the temperature of system in the required range. The outcomes indicated that the overall energy and exergy efficiencies of the system were 85% and 76% respectively. The number of entropy generated was 0.26. The results showed that PCM acted as smart regulator to keep supplying the amount of heat to the system even after the absent of heat source. PCM also could increase the exergy output and led to reduce the exergy destruction. This indicates that the PCM could improve the exergy efficiency. The overall outcomes showed that the PCM optimized the performance of solar water heater system by improve energy and exergy efficiencies.
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