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A NEW INSTRUMENT FOR MEASURING LOCAL MOISTURE CONTENTS IN MOIST POROUS MEDIA |
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| Authors: | HAN Ji-tian School of Energy Source Power Engineering Shandong University Jinan China WANG Ji-hao College of Control Science Technology Shandong University Jinan China GUI Ke-ting SHI Ming-heng |
| Affiliation: | HAN Ji-tian School of Energy Source and Power Engineering,Shandong University,Jinan 250061,China,WANG Ji-hao College of Control Science and Technology,Shandong University,Jinan 250061,China GUI Ke-ting,SHI Ming-heng Department of Power Engineering,Southeast University,Nanjing 210096,China |
| Abstract: | A new instrument was developed for measuring the local moisture content in moist porous media based on the needle-type capacitance sensor and single-chip microprocessor technique. The working principle, the structure and characteristics of the hardware and software of the instrument were presented. The dynamic response characteristics and reliability of the instrument were experimentally determined. As an example, the instrument was employed to measure the heat and mass transport properties of a moist porous material. The experimental results show that the instrument can be used for measuring the local moisture content in moist porous media and would be an effective tool for determining the heat and mass transport properties in moist porous media. |
| Keywords: | moisture contents capacitance sensor porous media heat and mass transfer |
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