發(fā)布時(shí)間：2018-05-29 00:22

  本文選題：冷鏈運(yùn)輸 + 蓄冷劑��； 參考：《安徽工業(yè)大學(xué)》2017年碩士論文

【摘要】：居民生活水平的提升,導(dǎo)致人們對(duì)于生鮮農(nóng)產(chǎn)品的需求量日益增強(qiáng)。本課題著手于小批量生鮮農(nóng)產(chǎn)品和易腐食品的短距離低溫運(yùn)輸,設(shè)計(jì)出生鮮農(nóng)產(chǎn)品冷鏈專用冷藏箱及蓄冷劑,并圍繞冷藏箱研發(fā)出一整套的生鮮農(nóng)產(chǎn)品冷鏈物流系統(tǒng),旨在為生鮮農(nóng)產(chǎn)品的冷鏈低溫運(yùn)輸,提供有效可行方案。具體研究?jī)?nèi)容如下:(1)生鮮農(nóng)產(chǎn)品冷鏈專用蓄冷劑的初選與性能優(yōu)化①綜合對(duì)比冰塊、干冰以及凝膠相變蓄冷劑的制冷性能及經(jīng)濟(jì)性,確定將凝膠作為生鮮農(nóng)產(chǎn)品專用冷藏箱的冷源;②通過(guò)6組不同比例下的配比試驗(yàn)及3組流動(dòng)改性試驗(yàn),確定蓄冷劑的配方為0.3mol/L的甘露醇與0.1mol/L的氯化鉀按體積比1∶1混合,其相變溫度為-4.65℃,相變潛熱為308.1642 J/g。③將本文研發(fā)的蓄冷劑與市面9種蓄冷劑進(jìn)行性能對(duì)比,證實(shí)本文研發(fā)的生鮮農(nóng)產(chǎn)品冷鏈專用蓄冷劑性能優(yōu)于市面上的同類產(chǎn)品。(2)生鮮農(nóng)產(chǎn)品冷鏈專用冷藏箱的開發(fā)設(shè)計(jì)①計(jì)算箱體的冷負(fù)荷,結(jié)果表明8 L的小型冷藏箱只需要1300KJ的冷負(fù)荷即可實(shí)現(xiàn)貨物48h的低溫運(yùn)輸�！�2利用FLUENT軟件對(duì)冷藏箱的保溫能力和蓄冷劑的放置量進(jìn)行模擬分析,得出蓄冷劑與貨物按質(zhì)量比為1∶1放置的情況下所研發(fā)冷藏箱的保冷時(shí)間為66.3h。從保溫效果及經(jīng)濟(jì)性方面分析,在冷藏箱的實(shí)際使用過(guò)程中,蓄冷劑與貨物的放置比例以1∶3~1∶2為宜,某些不易儲(chǔ)運(yùn)的高附加值貨物,放置比例可達(dá)1∶1~2∶1。(3)生鮮農(nóng)產(chǎn)品冷鏈專用冷藏箱的冷藏試驗(yàn)以預(yù)冷到0℃的草莓作為試驗(yàn)對(duì)象,將草莓與蓄冷劑按1∶1的質(zhì)量比放入冷藏箱內(nèi),對(duì)比分析所研制蓄冷劑+所研制冷藏箱(CY1)、所研制蓄冷劑+市售冷藏箱(CY2)、市售蓄冷劑+市售冷藏箱(CY3)與冰塊+泡沫箱(CY4)這四種儲(chǔ)存條件下60h后草莓的保鮮效果。經(jīng)過(guò)63.8h,四組試驗(yàn)的腐爛指數(shù)分別為13.0%、15.8%、19.6%與30.1%。明確:目前冷鏈運(yùn)輸常用的冰塊+泡沫箱的保鮮效果與其他三組有著顯著差距,而本文研發(fā)的生鮮農(nóng)產(chǎn)品專用冷藏箱配合研發(fā)蓄冷劑的保鮮效果最為優(yōu)越,優(yōu)于市面同類產(chǎn)品。(4)生鮮農(nóng)產(chǎn)品冷鏈的配套系統(tǒng)設(shè)計(jì)為健全生鮮農(nóng)產(chǎn)品冷鏈運(yùn)輸體系,圍繞本文所開發(fā)的生鮮農(nóng)產(chǎn)品專用冷藏箱配套設(shè)計(jì)一個(gè)低溫倉(cāng)儲(chǔ)系統(tǒng),通過(guò)將一個(gè)小型倉(cāng)庫(kù)改裝成生鮮農(nóng)產(chǎn)品冷鏈專用冷庫(kù)實(shí)現(xiàn)冷鏈運(yùn)輸前的商品預(yù)冷和蓄冷劑的充冷過(guò)程,通過(guò)設(shè)計(jì)計(jì)算,冷庫(kù)的容量為201.92t,冷負(fù)荷為594.91KW。
[Abstract]:The improvement of the living standard of residents has led to the increasing demand for fresh agricultural products. This subject begins with the short and low temperature transportation of fresh agricultural products and perishable food in small quantities, designs the cold chain special refrigerator and refrigerant for fresh agricultural products, and develops a whole set of cold chain logistics system for fresh agricultural products around the refrigerator. The purpose of this study is to provide effective and feasible solutions for cold chain cryogenic transport of fresh agricultural products. The specific research contents are as follows: (1) primary selection and performance optimization of cold chain special refrigerants for fresh agricultural products (1) the refrigeration performance and economy of ice, dry ice and gel phase change refrigerants are compared synthetically, and the gel is used as the cold refrigerator for fresh agricultural products. 2. Through the ratio test under 6 different proportions and 3 groups of flow modification tests, it is determined that the potassium chloride of 0.3mol/L and 0.1mol/L is mixed with 1: 1 by volume ratio, the phase change temperature is -4.65 C, the latent heat of phase change is 308.1642 J/g., and the performance of the cold storage agent developed in this paper is compared with the market 9 kinds of refrigerants. The cold chain special refrigerant of fresh agricultural products developed in this paper is superior to the same product on the market. (2) the development and design of the cold chain special refrigerator for fresh agricultural products (1) the cold load of the box is calculated. The result shows that the cold load of the 8 L small refrigerator is only required by the cold load of 1300KJ. 0. 2 use FLUENT software to refrigerate the refrigerated goods. The heat preservation ability of the box and the storage capacity of the refrigerant are simulated and analyzed. The cold storage time of the refrigerated box is 66.3h. under the condition of the mass ratio of 1 to 1. It is analyzed from the heat preservation effect and the economy. In the actual use of the refrigerator, the proportion of the cold storage agent and the goods is 1: 3~1: 2. Some high added value goods which are not easy to be stored and transported can be placed in the cold chain refrigerated box of 1: 1~2: 1. (3) cold chain for fresh agricultural products. The strawberry, which is pre cooled to 0 degrees centigrade, is used as the test object. The strawberry and the cold storage agent are placed in a refrigerated box with the ratio of 1 to 1. The refrigerating agent developed by the refrigerated refrigerant (CY1) is compared and analyzed, and the cold storage agent is developed. Market storage refrigerated box (CY2), market storage refrigerant + CY3 refrigerated box (CY3) and ice + foam box (CY4) under the four storage conditions after 60H strawberry preservation effect. After 63.8h, the decay index of the four groups were 13%, 15.8%, 19.6% and 30.1%. clear: at present, the cold chain transport of ice + foam box and the other three groups have significant effect. The effect of the fresh agricultural product special refrigerator and the research and development of the refrigerant is the most superior, which is superior to the similar products in the market. (4) the supporting system for the cold chain of fresh agricultural products is designed to improve the cold chain transportation system of fresh agricultural products and design a low temperature warehouse around the special cold storage box of fresh agricultural products developed in this article. In the storage system, a small warehouse is converted into a cold chain special cold storage of fresh agricultural products to achieve cold chain pre cooling and refrigerant charging process before the cold chain transportation. Through the design calculation, the capacity of the cold storage is 201.92t, and the cold load is 594.91KW.
【學(xué)位授予單位】：安徽工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：F326.6

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