本文選題：冷藏陳列柜 + 溫度場(chǎng)��； 參考：《天津商業(yè)大學(xué)》2017年碩士論文

【摘要】：近年來(lái)隨著我國(guó)城鎮(zhèn)化水平提高、居民生活方式轉(zhuǎn)變以及人們對(duì)食品安全的重視,智能化冷藏柜需求顯著增大。本文對(duì)冷藏陳列柜內(nèi)部的溫度分布和速度分布進(jìn)行了分析和研究,通過(guò)建立數(shù)學(xué)計(jì)算模型進(jìn)行數(shù)值計(jì)算,為試驗(yàn)提供優(yōu)化指導(dǎo)和依據(jù),確定了該冷藏柜較佳的風(fēng)幕送風(fēng)速度,風(fēng)幕射流角度,并且通過(guò)試驗(yàn)在此角度和送風(fēng)速度情況下進(jìn)行試驗(yàn)測(cè)試,以試驗(yàn)來(lái)驗(yàn)證模擬的準(zhǔn)確性。首先在試驗(yàn)中測(cè)試了冷藏柜封閉柜門情況下溫度分布,在得到柜內(nèi)分布較為穩(wěn)定和均勻的情況下,進(jìn)行進(jìn)一步試驗(yàn),本文研究的是體積較大型的冷藏柜,有三個(gè)柜門,打開(kāi)一個(gè)柜門進(jìn)行試驗(yàn)研究,用實(shí)驗(yàn)儀器測(cè)得試驗(yàn)冷藏柜內(nèi)部溫度分布。然后再進(jìn)行下一步試驗(yàn),在柜內(nèi)放置試驗(yàn)用的食品包,測(cè)試柜內(nèi)添加載荷情況下冷藏柜內(nèi)溫度場(chǎng)分布,先測(cè)量柜門關(guān)閉情況下柜內(nèi)溫度分布,試驗(yàn)完成后再測(cè)量柜門開(kāi)啟一個(gè)的時(shí)候,柜內(nèi)溫度場(chǎng)分布。最后將實(shí)驗(yàn)數(shù)據(jù)進(jìn)行處理,并與數(shù)值模擬結(jié)果進(jìn)行對(duì)比分析,得出以下結(jié)論:1.先進(jìn)行數(shù)值模擬,模擬采用COMSOL軟件,以非等溫流體模型進(jìn)行數(shù)值模擬,模擬中先以1m/s的送風(fēng)速度對(duì)比分析在不同射流角度下的柜內(nèi)溫度和速度分布,模擬選用角度分別為5°、0°、-5°、-10°,通過(guò)對(duì)比這四種不同風(fēng)幕射流角度發(fā)現(xiàn)以-5°傾角為最佳,送回風(fēng)溫度差值較小,柜內(nèi)溫度分布相對(duì)均勻,風(fēng)幕能夠較好形成。2.模擬確定送風(fēng)角度后,在該角度條件下,模擬不同風(fēng)幕送風(fēng)速度,對(duì)柜內(nèi)溫度場(chǎng)和速度場(chǎng)的影響,模擬選用送風(fēng)速度分別為0.5m/s、0.8m/s、1.0m/s、1.2m/s,通過(guò)對(duì)比不同風(fēng)速下柜內(nèi)溫度場(chǎng)的均勻性和穩(wěn)定性,以及風(fēng)幕的完整性,發(fā)現(xiàn)在送風(fēng)速度為0.8m/s時(shí)柜內(nèi)溫度分布較為均勻,冷量溢出較少,風(fēng)幕能夠完好形成。3.進(jìn)行試驗(yàn)測(cè)試,記錄和處理數(shù)據(jù),通過(guò)對(duì)比試驗(yàn)和數(shù)值模擬,能夠發(fā)現(xiàn)試驗(yàn)和模擬偏差較小,驗(yàn)證了模擬的準(zhǔn)確性,得出該送風(fēng)角度和送風(fēng)速度能夠?yàn)槔洳毓駜?yōu)化設(shè)計(jì)提供依據(jù)。4.通過(guò)實(shí)驗(yàn)發(fā)現(xiàn),冷藏柜內(nèi)溫度分布的均勻性和穩(wěn)定性與柜內(nèi)有無(wú)負(fù)載有較大影響,在柜內(nèi)無(wú)載荷時(shí),柜門開(kāi)啟狀態(tài)下溫度波動(dòng)范圍大,頻率高,當(dāng)放入商品載荷時(shí),柜內(nèi)溫度波動(dòng)較小,能夠很好的穩(wěn)定柜內(nèi)溫度場(chǎng)分布。
[Abstract]:In recent years, with the improvement of urbanization, the change of residents' lifestyle and the importance of food safety, the demand for intelligent refrigerators has increased significantly. In this paper, the temperature distribution and velocity distribution inside the refrigerated display cabinet are analyzed and studied. By establishing a mathematical calculation model to carry out numerical calculation, the optimum guidance and basis for the test are provided, and the better air curtain air delivery speed of the refrigerator is determined. The angle of the air curtain jet is tested at this angle and the velocity of the air supply to verify the accuracy of the simulation. First of all, the temperature distribution in the closed cabinet door of the freezer was tested, and further tests were carried out under the condition that the distribution in the cabinet was more stable and uniform. In this paper, the larger freezer with three cabinet doors was studied. A cabinet door was opened for experimental study and the internal temperature distribution of the test freezer was measured with an experimental instrument. Then the next step of the test is to place the food bags used for the test in the cabinet. The temperature field distribution in the freezer is measured under the condition of adding load in the test cabinet, and the temperature distribution in the cabinet is first measured when the cabinet door is closed. After the test is completed, the temperature distribution in the cabinet is measured when the door is opened. Finally, the experimental data are processed and compared with the numerical simulation results, and the following conclusions are drawn: 1. In the simulation, the temperature and velocity distribution in the tank under different jet angles are analyzed by comparing the air velocity of 1m/s with the non-isothermal fluid model. The simulated angle is 5 擄0 擄-5 擄-5 擄-10 擄. By comparing the four different air curtain jet angles, it is found that the angle of -5 擄inclination is the best, the difference of return air temperature is small, the temperature distribution in the cabinet is relatively uniform, and the air curtain can better form .2. After determining the air supply angle, under the condition of this angle, the influence of different air curtain supply velocity on the temperature field and velocity field in the cabinet is simulated. By comparing the uniformity and stability of the temperature field in the cabinet and the integrity of the air curtain under different wind speeds, it is found that the temperature distribution in the tank is more uniform and the cold overflow is less when the air supply speed is 0.8m/s, and the air supply velocity is 0.5m / s / s respectively 1.0 m / s / s ~ 1.2 m / s / s, respectively, by comparing the uniformity and stability of the temperature field in the cabinet under different wind speeds, as well as the integrity of the air curtain. The wind curtain can be formed perfectly. Test test, record and process data, through contrast test and numerical simulation, it can be found that the deviation between test and simulation is small, and the accuracy of simulation is verified. It is concluded that the air supply angle and the air supply speed can provide the basis for the optimum design of the freezer. It is found that the uniformity and stability of the temperature distribution in the freezer have great influence on the load or not. When there is no load in the cabinet, the temperature fluctuation range is large and the frequency is high in the open state of the cabinet door. When the load is put into the container, The temperature fluctuation in the cabinet is small, which can stabilize the temperature distribution in the cabinet.
【學(xué)位授予單位】：天津商業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TB658

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 周子成;;2015年中國(guó)冷凍冷藏市場(chǎng)[J];制冷;2016年04期

2 張穎川;;農(nóng)產(chǎn)品電商冷鏈物流發(fā)展之路[J];物流技術(shù)與應(yīng)用;2016年S1期

3 張建一;黃毅銘;詹捚;;大型超市冷凍冷藏陳列柜應(yīng)用現(xiàn)狀和節(jié)能分析[J];制冷與空調(diào);2011年05期

4 陳蘊(yùn)光;袁秀玲;;立式冷藏陳列柜內(nèi)部結(jié)構(gòu)對(duì)冷風(fēng)幕流動(dòng)的影響[J];西安交通大學(xué)學(xué)報(bào);2009年01期

5 張文慧;龔毅;呂彥力;;冷藏陳列柜空氣預(yù)冷器對(duì)食品溫度的影響分析[J];流體機(jī)械;2008年10期

6 谷波;周穎;;商用制冷陳列柜能耗標(biāo)準(zhǔn)分析[J];制冷與空調(diào);2008年01期

7 呂彥力;袁培;薛牡丹;張文慧;;降低立式敞開(kāi)食品冷藏陳列柜結(jié)霜新方法研究[J];廣西輕工業(yè);2007年11期

8 周穎;谷波;顧眾;陳楠;;國(guó)內(nèi)外制冷陳列柜能耗標(biāo)準(zhǔn)分析[J];低溫工程;2007年05期

9 楊曉明;張文慧;龔毅;;減濕預(yù)冷器對(duì)冷藏陳列柜風(fēng)幕性能的影響分析[J];制冷;2007年03期

10 張文慧;呂彥力;龔毅;;冷藏陳列柜空氣預(yù)冷器設(shè)計(jì)[J];鄭州輕工業(yè)學(xué)院學(xué)報(bào);2006年04期

相關(guān)博士學(xué)位論文 前1條

1 方凱;我國(guó)農(nóng)產(chǎn)品冷鏈物流的發(fā)展問(wèn)題研究[D];華中農(nóng)業(yè)大學(xué);2013年

，

本文編號(hào)：1821264