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许多部门都需要快速、方便而准确地测定液体的导热系数。例如,在节能研究中,希望知道乳化燃料——一种新型液体燃料在不同浓度时的导热、导温系数。目前国内还没有这方面资料。液体的导热系数是比较难以测定的参数,因为液体中可能出现的对流和辐射换热将影响测试结果的准确性。采用稳态法测试时,控制边界条件需要复杂的装置。此外,液体的膨胀或泄漏等问题,也给测试工作带来一些困难。
Many departments need fast, easy and accurate determination of liquid thermal conductivity. For example, in the study of energy conservation, it is desirable to know the thermal conductivity and thermal conductivity coefficient of emulsified fuel, a new type of liquid fuel, at different concentrations. At present, there is no such information in China. The thermal conductivity of liquids is a more difficult parameter to measure because the convection and radiative heat transfer that may occur in the fluid will affect the accuracy of the test results. When using the steady-state test, controlling the boundary conditions requires complex devices. In addition, problems such as liquid expansion or leakage also present some difficulties in testing.