Microsoft PowerPoint - .ppt []





OutlineOutline
H t Pi B i1. Heat Pipe Basic 2. Heat Pipe Typep yp 3. Heat Pipe 2nd Operation
P d ti P4. Production Progress 5. Heat Pipe Testingp g 6. Heat Pipe Property
H t Pi E l ti7. Heat Pipe Evaluation 8. Another types of Heat Pipe8. ot e types o eat pe






1. Heat pipe Basic1. Heat pipe Basic
1.>> 2 ΔT 02.ΔT → 0






(12mm)
(12mm)
Evaporate () section: Qin, (made by user) Condense () section: Qout, (made by user)( ) Q , ( y ) Adiabatic () section: No Qin, Qout (made by user, not made
by nature), if user do not holding some section by adiabatic material by conduction or convection effect The section will bematerial, by conduction or convection effect. The section will be Condense section.






Wick Fluid












2. Heat Pipe Type
Screen Mesh Sintered powder
1. 2.
))
Sintered Powder
1. 2 (2mm)
2. (2mm) ,
1 1 Fiber 1. 1. Fujikura







Ψ3 2 3.65 ±0.15 2.5 3.32 ±0.15
Ψ4 2 5.23 ±0.15 2 5 4 96 ±0 152.5 4.96 ±0.15 3 4.65 ±0.15
Ψ5 2 5 6 53 ±0 15Ψ5 2.5 6.53 ±0.15 3 6.26 ±0.15
3.5 5.95 ±0.15 4 5.63 ±0.15






2.5 8.16 ±0.15
Ψ8 2.5 11.39 ±0.15 3 11.15 ±0.15
3.5 10.83 ±0.153.5 10.83 ±0.15 4 10.60 ±0.15
4.5 10.27 ±0.15 5 10.01 ±0.15
2.5 9.36 ±0.15
. Bending R>3D
. Flatten t>0.5D


















Function TestFunction Test
A quarter length of the heat pipe was immersed into a hot bath 60, the ambient condition is 22±3 free convection. Test time about 3~5 sec.
Condition Criteria L<200mm T<1L<200mm T<1 200<L<300mm T<2






Heat Input Te
Fan: to keep Ta on given temperature rmp depend on TadiaFan: to keep Ta on given temperature, rmp depend on Tadia.












Cp=1.007 KJ/(Kg.K)
Cp=4.185 KJ/(Kg.K) Cp 4.185 KJ/(Kg.K) hfg=2359 KJ/Kg (at 60)
Q= Cp T
Q= Cp Tm
Q= hfg ()
Merit (W/m2)() 10
*106
*1011
4040 0.07370.0737 2.412.41 0.6940.694 0.05110.0511 0.9920.992 0.9660.966 0.6630.663 0.6320.632 2.52.5
6060 0.1990.199 2.362.36 0.6610.661 0.130.13 0.9830.983 1.051.05 0.4730.473 0.6540.654 3.243.246060 0 990 99 3636 0 660 66 0 30 3 0 9830 983 0505 0 4 30 4 3 0 6540 654 3 43 4
8080 0.4740.474 2.312.31 0.6250.625 0.2930.293 0.9720.972 1.131.13 0.3580.358 0.6720.672 3.923.92
100100 1.0131.013 2.252.25 0.5880.588 0.5980.598 0.9580.958 1.21.2 0.2840.284 0.6820.682 4.464.46


















8. Another types of Heat Pipe8. Another types of Heat Pipe
Heat Column L H t PiLoop Heat Pipe
Pulsating Heat PipePulsating Heat Pipe Vapor Chamberp






(Qmax>=200W)( ) 2. 3 3.






Scheme and Diagram of working cycle f LHPof an LHP






ill tioscillation






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