Experimental Study on the Thermal Conductivity of Three Natural Insulators for Industrial Fishing Applications

IF 4.6 Q2 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY Recycling Pub Date : 2023-10-06 DOI:10.3390/recycling8050077
Laura Leinad Lobo-Ramos, Yulibeth Carolina Osorio-Oyola, Alvaro Espeleta-Maya, Francisco Narvaez-Montaño, Shirley Patricia García-Navarro, Luis Alfonso Moreno-Pacheco, Ricardo Andrés García-León
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引用次数: 1

Abstract

Ecological materials have been implemented in different industrial sectors due to their good performance as thermal insulators and the fact that they are 100% natural, recyclable, and biodegradable, contributing to environmental sustainability. The main objective of this article is to compare the thermal conductivity coefficients of three natural insulators with that of expanded polystyrene (a non-biodegradable material). Expanded polystyrene is one of the materials which is most often used to maintain cold temperatures in containers built for this purpose in the fishing industry; it is used for this purpose because of its properties, including a light weight and a high thermal insulation capacity and resistance. Almost all insulators have the ecological disadvantage of being environmentally unfriendly materials because they are made up of oil particles, which are not recyclable and are harmful to ecosystems. The natural insulator materials were evaluated and subjected to a drying process to reduce the humidity coefficient; then, the containers were built with an adequate insulation thickness of 25 mm. Three filling tests were carried out (at 100, 70, and 50%) to evaluate the thermal conductivity, using the Mann–Whitney U statistical analysis process to determine insulator differences. The results show that the expanded polystyrene had the lowest thermal conductivity of 0.032 W/m K, followed by the rice husk, which had a value of 0.036 W/m K. Finally, a comparative study of conservation costs was carried out in the different containers built with the natural insulators; the lowest value found was for the expanded polystyrene (COP 159.57 around USD 0.040). This allowed to conclude that rice husk is the material that comes closest to the insulating characteristics of expanded polystyrene.
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工业捕鱼用三种天然绝缘体导热系数的实验研究
生态材料在不同的工业领域得到了应用,因为它们具有良好的隔热性能,而且它们是100%天然的、可回收的、可生物降解的,有助于环境的可持续性。本文的主要目的是比较三种天然绝缘体与膨胀聚苯乙烯(一种不可生物降解的材料)的导热系数。膨胀聚苯乙烯是最常用的材料之一,用于维持渔业中为此目的而建造的容器的低温;它被用于这一目的,因为它的特性,包括重量轻,高隔热能力和电阻。几乎所有的绝缘体都有对环境不友好材料的生态劣势,因为它们是由油颗粒组成的,不可回收利用,对生态系统有害。对天然绝缘子材料进行了评价,并进行了干燥处理,以降低湿度系数;然后,用25毫米的绝缘厚度建造容器。使用Mann-Whitney U统计分析过程来确定绝缘体差异,进行了三次填充测试(在100,70和50%)来评估导热性。结果表明,膨胀聚苯乙烯的导热系数最低,为0.032 W/m K,其次是稻壳,导热系数为0.036 W/m K。最后,对比研究了不同天然保温层容器的保温成本;最低值是膨胀聚苯乙烯(COP 159.57,约0.040美元)。由此可以得出结论:稻壳是最接近膨胀聚苯乙烯绝缘特性的材料。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Recycling
Recycling Environmental Science-Management, Monitoring, Policy and Law
CiteScore
6.80
自引率
7.00%
发文量
84
审稿时长
11 weeks
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