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蒸发设备的沸腾给热系救,许多学者曾进行过研究。由于它是一个极其复杂的现象,所以一般学者,都仅仅提出了计算给热系敖的一些经验方程式,其应用范围是有限制的。 虽然也曾有学者列出沸腾给热的微分方程式,并从而导出准数。但是由于所得到的准数中有一些数据无法由实验测定,因而不能应用实验数据,定出其准数间的函数关系。 沸腾给热,实际上是显热能、汽化热能,表面能、静压能,摩擦能,位能及动能之间的相互转换。作者根据能量转换的观点,运用相似转变,获得了可以用实验测定的一般准数函数关系: 并整理了克奇保尔 (Kinschbaum)的实验数据,得到关系式: 所用的数据范围极广,不仅有与稀溶液相类似的蒸馏水,也有粘度很大的50%的糖液及接近饱和的电解质NaCl溶液。工业上常用的蒸发压力及传热温度差,也都在实验范围之内。整理的结果,很令人满意。而所到的式(2),在一定范围内,是有其实用价值的。
Evaporation equipment boiling to save the heat, many scholars have conducted research. Because it is an extremely complicated phenomenon, most scholars have just put forward some empirical equations to calculate the thermal dependence, and the application scope is limited. Although some scholars have also listed the differential equations of boiling to heat and thus derive the quasi-numbers. However, since some of the obtained quasi-numbers can not be determined experimentally, the experimental data can not be used and the functional relationship between the quasi-numbers can not be determined. Boiling to heat, in fact, was sensible heat, heat of vaporization, surface energy, static pressure energy, friction energy, potential energy and kinetic energy conversion between. From the viewpoint of energy conversion, the author obtained a general quasi-quasi-functional relationship that can be determined experimentally by using similar transformations. The experimental data of Kinschbaum were compiled and the relation was obtained: the data used was of a very wide range and not only There are distilled water similar to the dilute solution, but also a 50% viscous sugar solution and a nearly saturated electrolyte NaCl solution. Common industrial evaporation pressure and heat transfer temperature difference, are also within the experimental range. Finishing results, very satisfactory. And to the type (2), in a certain range, is of practical value.