本文選題：比熱 + 溫度�。� 參考：《農(nóng)業(yè)工程學(xué)報(bào)》2016年18期

【摘要】：為探究調(diào)質(zhì)、制粒等熱處理過(guò)程中仔豬配合粉料傳熱的基本特性,有效控制熱量供給并實(shí)現(xiàn)調(diào)質(zhì)溫度、時(shí)間等工藝參數(shù)的優(yōu)化評(píng)估,該文以4種粉碎粒度(粉碎篩片孔徑:Φ1.0、Φ1.5、Φ2.0和Φ2.5 mm)的仔豬配合粉料為研究對(duì)象,采用DSC(differential scanning calorimetry,差示掃描量熱法)的方法測(cè)定了其在不同含水率范圍(10%~18%,濕基)和不同溫度范圍(25~100℃)的比熱,并分析了3個(gè)變量對(duì)比熱的影響規(guī)律,構(gòu)建了比熱關(guān)于研究變量的預(yù)測(cè)模型。結(jié)果顯示:仔豬配合粉料的比熱受含水率、溫度、粉碎粒度的顯著影響,其中含水率的影響最為顯著,溫度及粉碎粒度次之;比熱亦受含水率與粉碎粒度及其與溫度的交互作用影響。比熱隨含水率和溫度的增加在1.533~2.881 k J/(kg·K)范圍內(nèi)升高,且與含水率呈線性關(guān)系,與溫度呈非線性關(guān)系。粉碎過(guò)Φ2.5和Φ2.0 mm的仔豬料比熱較粉碎過(guò)Φ1.5和Φ1.0 mm的大,在高溫(60~100℃)和高含水率(18%)時(shí)表現(xiàn)尤為明顯�；谠囼�(yàn)數(shù)據(jù)建立了比熱關(guān)于含水率、溫度、粉碎粒度的多元回歸模型(R~20.993),可以有效預(yù)測(cè)仔豬配合料在此研究變量范圍內(nèi)的比熱。研究結(jié)果為仔豬配合料調(diào)質(zhì)過(guò)程傳熱方程的建立提供基礎(chǔ)數(shù)據(jù),并為其熱處理工藝參數(shù)的優(yōu)化提供理論依據(jù)。
[Abstract]:In order to explore the basic characteristics of heat transfer of piglets combined with powder in the process of heat treatment and granulation, to effectively control the heat supply and to realize the optimization evaluation of the tempering temperature, time and other technological parameters, this paper uses 4 kinds of comminuted granularity (pulverized sieves diameter: 1, 1.5, 1.5, 2 and 2.5 mm) as the research object, and uses DSC (differential) Scanning calorimetry, differential scanning calorimetry (differential scanning calorimetry) method was used to determine the specific heat in the range of water content (10%~18%, wet base) and different temperature range (25~100 C), and the influence of 3 variables on the specific heat was analyzed. The prediction model of the specific heat on the research variable was constructed. The results showed that the specific heat of the piglets was affected by the water content and temperature. The effect of water content is the most significant, the temperature and the particle size are the most significant, and the specific heat is influenced by the interaction of water content and grinding grain and its temperature. The specific heat increases with the increase of water content and temperature in the range of 1.533~2.881 K J/ (kg. K), and has a linear relationship with the water content, and the temperature is non line with the temperature. Sex relations. The piglets that have crushed the diameter of 2.5 and 2 mm have larger than the heat of 1.5 and 1 mm, especially at high temperature (60~100) and high water content (18%). Based on the experimental data, a multiple regression model (R~20.993) of specific heat on water content, temperature and particle size can be established, which can effectively predict the change of piglet complex in this study. The results of the study provide the basic data for the establishment of heat transfer equation for piglet mixing process, and provide a theoretical basis for the optimization of the heat treatment process parameters.
【作者單位】： 中國(guó)農(nóng)業(yè)大學(xué)工學(xué)院國(guó)家農(nóng)產(chǎn)品加工技術(shù)裝備研發(fā)中心;
【基金】：公益性行業(yè)(農(nóng)業(yè))科研專項(xiàng)(201203015)
【分類號(hào)】：S828.5

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