HEAT TRANSACTION PIPES / GREASE FOR HEAT TRANSACTION PIPE
■ GUIDE FOR HEAT TRANSACTION PIPES ● Features • High level of cooling performance The WHP Heat Transaction Pipe uses an operating solution as heat exchange medium instead of thermal conductive materials. This results in 200 times higher thermal conductivity and higher response than copper rods. • Stable cooling effects Unlike conventional methods (using baffle boards or cooling pipes), the WHP Heat Transaction Pipe is less likely to cause cooling efficiency drop due to water flow reduction caused by rust and fur, and does not cause water boiling problems. These features contribute to reduction of maintenance work.
WHP (Heat transaction pipe)
End cap (cooling side)
Section A
R0.3
● Structure
■ Cross section ※ Wick is a collection of capil lary tubes.
Core section
Section A
① The hydraulic uid takes heat through core and evaporates.
WHP2
Decompressed air
Sheath
± 1.0
L
M Material Copper
② The evaporated hydraulic uid moves to the cooling side due to the pressure difference in vapor.
Usable Temperature Range 30–200°C
Only WHP2/WHP3
Part Number
Wick (collection of capillaries)
L
Type
D
Absorbed heat
2 3 4 6 8
35 40 45 50 55 60 65 75 85 105 125 145 40 45 50 55 60 65 75 85 105 125 145
Mesh wick
End cap
Sheath (outer cylinder)
WHP3/4/6/8
WHP
50 55 60 65 75 85 105 125 145 165 205 225
Decompressed air
④ The hydraulic uid returns to core side due to capillary force of wick .
35 40 45 50 55 60 65 75 85 105 125 145 165 205 225
Sheath
35 40 45 50 55 60 65 75 85 105
■ Features of grease for heat transaction pipes ① Increases thermal conductivity to WHP. ② Also effective as a lubricant when attaching and detaching WHP.
MTJ (Grease for heat transaction pipes)
③ The working uid which has moved to cooling side releases heat and gets lique ed.
Cooling side
Spiral tube
Radiation
Copper Capillary Wick
■ Features • Usable Temperature Range: 0°C–200°C • Capacity: 100g • Color: White
● Operating Cycle
■ Thermal Response Property
<Testing conditions> • Heating medium: Hot water (80°C) • Cooling medium: Air (room temperature) • Heating: cooling section size = 1:1 • Measured location: Cooling section • Pipe size: φ 4 L105
100
Absorbed heat
WHP
80
Vaporization of hydraulic uid
Move to core side
Component specs
Part Number – L WHP 3 – 105 MTJ
60
Order
Name of substance
Composition ratio (%/PPM)
Vapor pressure difference
Polydimethylsiloxane
20–30% 50–60% 10–20%
Capillary action
40
Zinc oxide
Aluminum oxide and other metal oxides
Quotation
Delivery
Liquefaction hydraulic uid
Move to cooling side
20
0
50
100
150
200
Radiate heat
Time (Seconds)
Cavity
Example
■ Mounting method ① Make a WHP mounting hole in D + 0.1 diameter. ② Provide a water cooling jacket in light of the following: Depth (ℓ) → L/3 or more Hole diameter → D × 2 or more ③ We recommend that the (MTJ) grease be applied on the heat transaction pipe before inserting WHP into a mold. ④ The WHP must be inserted so that its end cap is on the cooling side.
■ Thermal conductivity
Unit kcal/h
Grease for heat exchange pipe （ MTJ ） Mold
■ Notes ① Use under a temperature of 200°C or lower. (Burst temperature 250°C) WHP is designed to withstand an internal pressure up to 20 kgf/cm 2 . (For example, the internal pressure rises to 16 kgf/cm 2 at 200°C). ② If the cooling section area is insufficient, proper cooling effects may not be obtained. Provide a water cooling jacket referring to mounting method, and secure the cooling section area. ③ Do not cut or disassemble. ④ Bending or squashing the heat transaction pipe hampers its cooling function. ⑤ Do not use oil for cooling.
Part Number L Type D 35 40 45 50 55 60 65
2 3 4 6 8
16.5 15.5 14.5 13.5 12.5 11.6 11 – 36.5 35.4 34.5 33.6 32.6 31.8
PL surface
D
Core
WHP
–
–
–110101 93 86.2
D ＋ 0.1
310 280 250 230 210 192 175 420 380 340 310 280 260 240
main body
Cavity
D × 2
Unit kcal/h
Cooling Jacket
Part Number L Type D 75 85 105 125 145 165 205 225
Cold water
2 3 4
9.5 8.2 6 5.6 5.2 – – – 30 28 25.8 23.2 20.6 – – – 80.8 74.7 68.8 61.9 53.3 41.7 37.8 37.0
End cap
WHP
6 160 145 130 118 109 102 95 89 8 221203180 – – – – –
Taper screw plug
1025
1026
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