Surface tension of quaternary bromide salts - Details

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Abstract：

Surface　tension　is　one　of　the　most　important　factors　directly　determining　transmission　capability　of　heat.　An　experimental　system　was　improved　to　measure　surface　tension　of　high　temperature　molten　liquid　with　pulling　escape　method　derived　from　the　du　Noüy　ring　method.　Instrument　coefficient　was　calibrated　with　chemically　pure　LiNO3.　By　measuring　surface　tensions　of　NaNO3　and　Solar　salt　(60%　NaNO3,　40%　KNO3,　mass　fraction),　reliability　of　experimental　system　and　method　was　validated.　On　this　basis,　four　samples　of　quaternary　bromide　salts　from　KBr,　LiBr,　NaBr　and　CaBr2　were　made　with　different　mass　ratios.　Surface　tensions　of　samples　were　measured　with　the　experimental　system　in　the　temperature　range　350-500　and　fitted　as　functions　of　temperature.　The　results　indicate　that　surface　tension　values　of　quaternary　bromide　salts　diminish　linearly　with　increasing　temperature,　in　accord　with　surface　tension　change　of　known　molten　liquids.　©　All　right　reserved.

Keyword：

Potassium Nitrate Salts Lithium compounds Calcium compounds Bromine compounds Potash Sodium nitrate Surface tension Nitrogen compounds Heat transfer

Author Community：

[ 1 ] [Shi, Jianfeng]Beijing Key Laboratory of Heating, Gas Supply, Ventilation and Air Conditioning, Beijing University of Civil Engineering and Architecture, Beijing; 100044, China
[ 2 ] [Xiong, Yaxuan]Beijing Key Laboratory of Heating, Gas Supply, Ventilation and Air Conditioning, Beijing University of Civil Engineering and Architecture, Beijing; 100044, China
[ 3 ] [Wu, Yuting]Key Laboratory of Enhanced Heat Transfer and Energy Conservation of Ministry of Education, Key Laboratory of Heat Transfer and Energy Conversion of Beijing Municipality, Beijing University of Technology, Beijing; 100124, China
[ 4 ] [Li, Deying]Beijing Key Laboratory of Heating, Gas Supply, Ventilation and Air Conditioning, Beijing University of Civil Engineering and Architecture, Beijing; 100044, China
[ 5 ] [Meng, Qiang]Key Laboratory of Enhanced Heat Transfer and Energy Conservation of Ministry of Education, Key Laboratory of Heat Transfer and Energy Conversion of Beijing Municipality, Beijing University of Technology, Beijing; 100124, China
[ 6 ] [Ma, Chongfang]Key Laboratory of Enhanced Heat Transfer and Energy Conservation of Ministry of Education, Key Laboratory of Heat Transfer and Energy Conversion of Beijing Municipality, Beijing University of Technology, Beijing; 100124, China
[ 7 ] [Chen, Hongbing]Beijing Key Laboratory of Heating, Gas Supply, Ventilation and Air Conditioning, Beijing University of Civil Engineering and Architecture, Beijing; 100044, China

Reprint Author's Address：

吴玉庭
[wu, yuting]key laboratory of enhanced heat transfer and energy conservation of ministry of education, key laboratory of heat transfer and energy conversion of beijing municipality, beijing university of technology, beijing; 100124, china

Email：

wuyuting@bjut.edu.cn

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