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当粗估较小物体的绝缘厚度,以及粗略地查核较大物体绝缘厚度的复杂计算时,对于能够迅速查明绝缘的经济厚度近似值的辅助图表,是很有用的。首先,在精确计算中,当几个必要的数值有错误时,它就能提供帮助。杜哈默(Dürhammer)在20年前曾经设计过此种图表,但所提出的线算图缺乏坚实的基础。认为温度(温差θ和导热系数λ)对投资值有双重影响是不恰当的。作为基础的价格也是揣测的,不能适应今日的情况。为了提出适用于今
It is useful to be able to quickly find the ancillary chart of the economic thickness approximation of insulation when evaluating the insulation thickness of smaller objects and roughly examining complex calculations of insulation thicknesses for larger objects. First, in precision calculations, it helps when there are errors in several of the necessary values. Dürhammer designed such a chart 20 years ago, but the proposed line chart lacks a solid foundation. It is inappropriate to assume that temperature (temperature difference θ and thermal conductivity λ) have a double impact on the value of the investment. As the basis of the price is speculation, can not adapt to today’s situation. In order to propose for today