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首頁> 外文學(xué)位 >Heat transfer reduction across the walls of refrigerated van trailers by the application of phase change material.
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Heat transfer reduction across the walls of refrigerated van trailers by the application of phase change material.

機(jī)譯：通過使用相變材料，可減少冷藏廂式貨車拖車壁的傳熱。

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The purpose of this thesis is to present the results obtained by incorporating phase change materials (PCMs) into the conventional insulated walls of commercial refrigerated van trailers (herein referred to as "refrigerated trucks"). The idea was to apply a building insulation technology (inclusion of PCMs) that was developed previously, at the University of Kansas, in the walls of refrigerated trucks. Although the technology had been applied to buildings, the concept is a novel one within the automotive industry. Although transportation experiences more dynamic challenges compared to its building counterpart, this analysis can open an interesting window for an innovative solution to an area of energy used in the transportation sector. In this research endeavor, two similar van trailer simulators were constructed and used to test the proposed technology under stationary environmental conditions. Both simulators were outfitted with the same number of measurement devices in the exact same locations. The technology was tested in similar days in terms of temperature and solar insolation. The relevant variables that were monitored were the heat flux across the walls of the simulators and temperatures, including surface and indoor air temperatures. Other relevant data, such as weather parameters (e.g., insolation) were also measured and recorded. The primary observation was how the peak heat flux and the total heat flow responded for the two simulators. The results obtained suggested that the van trailer simulator outfitted with PCMs had lower peak heat transfer rates by approximately 42.4% and total heat flow over a period of time one day by as much as 27.7%. Month-long results suggested that the reductions produced by the proposed technology were 43.8% for peak heat transfer rate and 26.3% for total heat transfer.;The refrigeration units that cool the insides of refrigerated trucks do so by burning fossil fuel, usually diesel. Any decrease in the refrigeration load requirements would eventually result in lower fuel consumption. The reduction in heat transfer rate (i.e., peak load) would assist in reducing the size of the cooling equipment, which could also result in cost savings.
機(jī)譯：本文的目的是介紹通過將相變材料（PCM）摻入商用冷藏廂式貨車的傳統(tǒng)隔熱壁（此處稱為“冷藏卡車”）中獲得的結(jié)果。這個想法是將一種以前在堪薩斯大學(xué)開發(fā)的建筑物保溫技術(shù)（包括PCM）應(yīng)用于冷藏卡車的墻壁上。盡管該技術(shù)已應(yīng)用于建筑物，但該概念在汽車行業(yè)是一個新穎的概念。盡管與建筑相比，交通運輸面臨更多動態(tài)挑戰(zhàn)，但該分析可以為交通運輸領(lǐng)域所用能源領(lǐng)域的創(chuàng)新解決方案打開一個有趣的窗口。在這項研究工作中，構(gòu)造了兩個類似的貨車拖車模擬器，并在固定的環(huán)境條件下對擬議的技術(shù)進(jìn)行了測試。這兩個模擬器在完全相同的位置配備了相同數(shù)量的測量設(shè)備。該技術(shù)已在相似的日子里進(jìn)行了溫度和日照方面的測試。監(jiān)視的相關(guān)變量是穿過模擬器壁的熱通量和溫度，包括地面和室內(nèi)空氣溫度。還測量并記錄了其他相關(guān)數(shù)據(jù)，例如天氣參數(shù)（例如，日照）。主要觀察是兩個模擬器的峰值熱通量和總熱流量如何響應(yīng)。獲得的結(jié)果表明，配備了PCM的廂式拖車模擬器的峰值傳熱率降低了約42.4％，一天的總熱流降低了27.7％。長達(dá)一個月的研究結(jié)果表明，所提出的技術(shù)可將峰值傳熱率降低43.8％，將總傳熱率降低26.3％。制冷車廂內(nèi)部的制冷裝置通過燃燒化石燃料（通常為柴油）進(jìn)行冷卻。制冷負(fù)荷要求的任何降低最終都將導(dǎo)致更低的燃料消耗。傳熱速率（即峰值負(fù)荷）的降低將有助于減小冷卻設(shè)備的尺寸，這也可以節(jié)省成本。

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