Abstract
The present article describes two various methods of determination of thermal conductivity of semi-solid and liquid materials. One is based on experimental measurements of heat flux through a layer of semi-solid material while using the Heat Flow Plates, and the second one uses Peltier Elements to determine the heat flux density. The first method was used to determine thermal conductivity of sludge taken from natural gas coolers. Its value, identified by measurements, was 0.746 W·m-1·K-1. The second method was applied to determine thermal conductivity for sludge taken from natural gas filtration units. Values thereof were ranging from 0.608 W·m-1·K-1 (at the mean sludge temperature of 22 °C) to 0.652 W·m-1·K-1 (at the sludge temperature of 43 °C).
Highlights
In the execution of the cooling or heating processes it is often required to know the value of thermal conductivity λ of semi-solid or liquid materials of unknown composition, in the cases of various heat exchangers, gas coolers, and other equipments the use of which requires identification of the quantity of heat removed/supplied through the heat-transfer surface which is contaminated, or even significantly glazed with such materials
The present article describes two methods of determination of this coefficient λ for the sludge taken from a natural gas cooler and from a natural gas filter at the KS01 Compressor Station in Veľké Kapušany
Determination of heat flux through a 12.5 mm thick sludge layer taken from a natural gas cooler was carried out while using an experimental device (Figure 1) consisting of the following parts:
Summary
In the execution of the cooling or heating processes it is often required to know the value of thermal conductivity λ of semi-solid or liquid materials of unknown composition, in the cases of various heat exchangers, gas coolers, and other equipments the use of which requires identification of the quantity of heat removed/supplied through the heat-transfer surface which is contaminated, or even significantly glazed with such materials. In the analytical heat flow determination, it is necessary to identify several thermal and technical parameters [1,2,3]. Some of the values of these parameters can be found in physical tables; others must be identified analytically or by experiments. Such parameters include thermal conductivity of materials. T where b is the layer thickness (m), t - difference in temperatures of both layer surfaces (K)
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