A preliminary experimental study on start-up behavior in nitrated gravity heat pipe - Details

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Abstract：

Molten　salt　is　a　highly　efficient　heat　transfer　working　fluid.　It　is　widely　used　in　central　solar　power,　nuclear　reactor,　and　heat　treatment　of　metals.　The　startup　process　of　gravity　heat　pipe　with　mixed　nitrate　as　the　working　fluid　was　investigated　experimentally　by　analyzing　the　startup　characteristics,　stability,　and　the　influence　of　inclination　angle　on　the　startup　behavior.　The　gravity　heat　pipe　was　fabricated　with　316　L　stainless　steel,　with　outer　diameter　of　22　mm,　thickness　of　2　mm　and　total　length　of　980　mm.　In　order　to　explore　the　heat　pipe　start-up　behavior　of　mixed　nitrates,　the　experimental　result　with　40　g　mixed　nitrate　working　fluid　is　compared　to　that　with　40　g　naphthalene　working　fluid.　The　startup　time　of　heat　pipe　with　mixed　nitrates　is　shorter　than　that　with　naphthalene　and　the　heat　pipe　with　mixed　nitrates　is　superior　to　that　with　naphthalene　in　the　stability.　The　boiling　point　of　mixed　nitrate　is　about　250.　The　startup　characteristics　at　inclination　angle　of　50°　are　superior　to　those　at　30°,　70°　and　90°.　The　experiment　shows　that　it　is　feasible　for　using　mixed　nitrates　as　the　working　fluid　of　heat　pipe.　©　All　Rights　Reserved.

Keyword：

Heat pipes Naphthalene Nitrates Vaporization Nitration Solar energy Fluids Nuclear reactors Heat transfer

Author Community：

[ 1 ] [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
[ 2 ] [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
[ 3 ] [Xiong, Yaxuan]Key Lab of HVAC, Beijing University of Civil Engineering and Architecture, Beijing ; 100044, China
[ 4 ] [Cui, Wujun]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
[ 5 ] [Liu, Shanwei]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 ] [Li, Deying]Key Lab of HVAC, Beijing University of Civil Engineering and Architecture, Beijing ; 100044, China