Reducing heat transfer across the insulated walls of refrigerated truck trailers by the application of phase change materials
Reducing heat transfer across the insulated walls of refrigerated truck trailers by the application of phase change materials
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DOI：
10.1016/j.enconman.2009.09.003
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发表时间：
2010-03-01
影响因子：
10.4
通讯作者：
Medina, Mario A.
中科院分区：
文献类型：
--
作者：
Ahmed, Mashud;Meade, Oliver;Medina, Mario A.
一般估计显示，美国80%的社区完全通过运输卡车接收货物，其中很大一部分是气候控制的，因为它们携带易腐货物，药品和许多其他对温度敏感的商品。保持卡车拖车的内部处于恒定的温度和相对湿度需要在整个运输期间进行精确的热量和/或湿度管理，这是通过放置在卡车外部的小型制冷装置进行调节的，该制冷装置通过燃烧燃料来运行。这些卡车，被称为冷藏车拖车，是本文的重点。在本文提出的研究中，使用相变材料（PCM）对冷藏卡车拖车的绝缘的常规方法进行了修改。与其他制冷过程相比，在冷藏运输方面进行的有限研究为这一领域的创新解决方案留下了空间。该研究调查了在标准拖车壁中包含石蜡基PCM作为减少传热技术。当考虑所有墙壁（南、东、北、西和顶部）时，观察到峰值传热率平均降低29.1%。对于单个壁，峰值传热率在11.3- 43.8%的范围内降低。观察到进入冷藏室的总体平均每日热流减少16.3%。这些成果有可能转化为节能、减少柴油制冷机组的污染、缩小制冷设备的尺寸和延长设备的使用寿命。这项研究及其结果将有助于更好地了解这项技术的范围。(C)2009爱思唯尔有限公司保留所有权利。
A general estimate shows that 80% of communities across the United States receive their goods exclusively by transport trucks, of which a significant number are climate-controlled because they carry perishable goods, pharmaceutical items and many other temperature-sensitive commodities. Keeping the inside of a truck trailer at a constant temperature and relative humidity requires exact amounts of heat and/or moisture management throughout the shipment period, which is regulated via small refrigeration units, placed outside the truck, that operate by burning fuel. These trucks, known as refrigerated truck trailers, are the focus of this paper. In the research presented herein, the conventional method of insulation of the refrigerated truck trailer was modified using phase change materials (PCMs). The limited research carried out in refrigerated transport compared to other refrigeration processes has left spaces for innovative solutions in this area. The research investigated the inclusion of paraffin-based PCMs in the standard trailer walls as a heat transfer reduction technology. An average reduction in peak heat transfer rate of 29.1% was observed when all walls (south, east, north, west, and top) were considered. For individual walls, the peak heat transfer rate was reduced in the range of 11.3-43.8%. Overall average daily heat flow reductions into the refrigerated compartment of 16.3% were observed. These results could potentially translate into energy savings, pollution abatement from diesel-burning refrigeration units, refrigeration equipment size reduction, and extended equipment operational life. The research and its results will help to better understand the scope of this technology. (C) 2009 Elsevier Ltd. All rights reserved.