差示扫描量热仪的炉体均温性研究

Temperature uniformity of DSC furnace body

差示扫描量热仪(DSC)作为研究油脂成分及物化性质与热流、能量关系的分析仪器,被广泛用于油脂加工业以及对油脂产品的深入研究过程中。DSC中炉体的均温性直接影响其对油脂温度的控制精度,若样品不能被精确地控制在规定的温度范围,且均匀受热,将会影响分析结果的准确性。针对DSC的炉体均温性问题,着重研究了样品端与参比端的间距对炉体均温性的影响。仿真及实验验证结果表明:样品端与参比端的间距越小,炉体均温性越好;考虑到样品端与参比端之间因距离太近而产生的热干扰,样品端与参比端的最佳间距为12.5 mm。

Differential Scanning Calorimeter （DSC） is an important instrument to analyze the relationship between oil composition, physicochemical properties and heat flux, energy, which is widely used in the oil processing industry as well as in the oil products in - depth research. Temperature uniformity of the DSC furnace body directly affects the control precision of the oil temperature. If the sample can＇ t be ac- curately controlled in the specified temperature range, and uniformly heated, the accuracy of the analysis results will be affected. Therefore, aiming at the problem of temperature uniformity of DSC furnace body, the influence of distance between sample and reference on the temperature uniformity of furnace body was mainly studied. The simulation and experimental results showed that the smaller the distance between sample and reference, the better the temperature uniformity of the furnace body. At the same time, considering the thermal interference caused by the distance between sample and reference, the best distance between sample and reference was 12.5 mm.