The densities of three biodiesel fuels at temperatures up to 300 °C |
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Affiliation: | 1. Japan Radioisotope Association, 2-28-45, Hon-komagome, Bunkyo, Tokyo 113-8941, Japan;2. Scarabs Corporation Co., Ltd., Japan;1. Department of Agricultural Engineering, Faculty of Agricultural Engineering & Technology, Payame Noor University, Tehran, Iran;2. Department of Biosystems Engineering, Arak University, Arak 38156-8-8349, Iran;3. Mechanical Engineering of Biosystems Department, Ilam University, Ilam, Iran |
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Abstract: | In order to obtain the densities of biodiesel fuels at temperatures up to 300 °C, a capacitance type liquid level meter was designed to measure the increase in volume of 50 ml of three commercial biodiesel fuels over the temperature range of 20–300 °C. Densities were measured for methyl esters of canola and soy and ethyl esters of fish-oil. The frequency output from the meter was linear with temperature and liquid level. Frequencies were recorded in kHz to within three decimal places and had sensitivities of 0.040 kHz/°C and ?2.740 kHz/cm for temperature and submergence depth, respectively. Derived densities were found to be linear with temperature over the measured range. Used in this fashion, the level meter can be considered a precise densitometer with a repeatability of 1%. |
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