種薯貯藏室內(nèi)環(huán)境溫濕度測試與數(shù)值模擬
本文選題:馬鈴薯貯藏 + 半地下式; 參考:《內(nèi)蒙古農(nóng)業(yè)大學》2017年碩士論文
【摘要】:馬鈴薯是一種宜菜、宜糧的茄科植物,因富含淀粉、蛋白質(zhì)、膳食纖維、維生素、礦物質(zhì)等而彌補了大米、小麥等主糧的缺陷,成為僅次于玉米、水稻和小麥的第4大糧食作物。馬鈴薯收獲后不是短時間內(nèi)消費完的,而是通過市場需求來慢慢供應,且因需求不同而其貯藏條件也不同,例如:種薯溫度以2~4℃為宜,工業(yè)加工薯3~5℃為宜,使用薯0~3℃為宜。并且收獲后仍然是一個活體,新陳代謝繼續(xù)進行,因此馬鈴薯貯藏是極為重要環(huán)節(jié)。本試驗選取以貯藏馬鈴薯種子為主的呼和浩特市內(nèi)蒙古農(nóng)業(yè)大學農(nóng)學院試驗基地半地下式貯藏室為研究對象,選用成前科技DWRF-B溫濕度傳感器進行布點測試,以太網(wǎng)web版遠程監(jiān)控平臺數(shù)據(jù)采集。再以泰仕電子工業(yè)股份有限公司的溫濕度非色散式二氧化碳測試計TES-1370對成前科技DWRF-B溫濕度傳感器進行標定,確保測試數(shù)據(jù)的精確性和可靠性。最后,結(jié)合測試數(shù)據(jù)進行CFD數(shù)值模擬。研究結(jié)果表明,雖然室外天氣變化劇烈且晝夜溫差大,但是馬鈴薯貯藏室內(nèi)北墻體附近溫度環(huán)境處于基本穩(wěn)定狀態(tài)。貯藏初期馬鈴薯貯藏室內(nèi)溫度比種薯適宜溫度高,而貯藏后期貯藏室內(nèi)溫度比種薯適宜溫度低。并且種薯堆放位置與北墻體具有一定距離;诹黧w力學的方法,利用Fluent軟件建立貯藏室計算流體力學模型,模擬研究后得出貯藏室內(nèi)主要能源來自于貯藏室內(nèi)地表面,北墻體和頂墻體附近溫度為最低,頂墻和北墻兩個通風口主要以通風換熱為主。并與實測值對比,驗證了模型的正確性以及模擬方法的可行性。對其貯藏室通風口尺寸不同時模擬研究貯藏室內(nèi)溫濕度分布,得出貯藏室通風口尺寸對貯藏室內(nèi)溫濕度影響較顯著,可以通過改變通風口尺寸來調(diào)節(jié)貯藏室內(nèi)溫濕度。
[Abstract]:Potato is a suitable vegetable, suitable for food plants, because of rich starch, protein, dietary fiber, vitamins, minerals and so on to make up for rice, wheat and other major grain defects, after corn, rice and wheat, the fourth major food crops. After the harvest is not a short time, but through the market demand to slowly supply. The storage conditions are different because of the different demand, such as the suitable temperature of 2~4 centigrade, 3~5 C for industrial sweet potato, 0~3 C for using sweet potato. And it is still a living body after harvest, and the metabolism continues to carry on. Therefore, the storage of potato is a very important link. And the research object of the semi underground storage room of the experimental base of the Agricultural College of the Inner Mongolia Agricultural University in hatht City, we choose the DWRF-B temperature and humidity sensor for the pre formed science and technology, and the data collection of the remote monitoring platform of the Ethernet web version. Then, the temperature humidity non dispersive carbon dioxide tester TES-1370 of the Costar Electronics Inc is formed. The temperature and humidity sensor of DWRF-B was calibrated to ensure the accuracy and reliability of the test data. Finally, the CFD numerical simulation was carried out with the test data. The results showed that the temperature environment near the north wall of the potato storage room was basically stable although the outdoor weather changed violently and the temperature difference was large in the day and night. The temperature in the storage room of the bell potato is higher than that of the seed potato, and the temperature of the storage room is lower than that of the seed. And the storage location of the seed sweet potato has a certain distance from the north wall. Based on the method of fluid mechanics, the Fluent software is used to establish the computational fluid dynamics model of the storage room, and the main energy sources in the storage room are obtained after the simulation. At the surface of the interior of the storage room, the temperature near the north wall and the top wall is the lowest, the two air vents of the top wall and the north wall are mainly ventilated and heat transfer mainly. And compared with the measured values, the correctness of the model and the feasibility of the simulation method are verified. The size of the air vent has a significant effect on the temperature and humidity of the storage room, and the temperature and humidity of the storage room can be adjusted by changing the size of the vent.
【學位授予單位】:內(nèi)蒙古農(nóng)業(yè)大學
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:S532
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