Function
- Specify pipe cooling information purported to reduce hydration temperature. Pipe cooling can be performed by casting pipes inside the concrete structure and pumping a low temperature liquid through the pipe. The low temperature liquid will prevent increase in temperature due to hydration. Heat transfer occurs between the surface of the pipe and the convection of the flowing liquid.
Call
From the main menu, select [Load] tab > [Type : Heat of Hydration] > [Heat of Hydration Analysis Data] group > [Pipe Cooling]
Input
Add : Click this button to input a new pipe cooling group.
Modify : Click this button to modify an existing pipe cooling group.
Delete : Click this button to delete an existing pipe cooling group.
Close : Click this button to close the dialog box.
Name
Enter the name of pipe cooling group.
Cooling Water
Specific Heat : Specific Heat of cooling water
Density : Density of cooling water
Inlet Temp : Inlet Temp of cooling water
Flow Rate : Flow Rate of cooling water
Inflow Time : Duration of pipe cooling relative to construction stage
Start : Starting construction stage and the time of application (hr)
End : Ending construction stage and the time of disengagement (hr)
Cooling Pipe
Diameter : Pipe diameter
Convection Coefficient : Convection Coefficient of cooling pipe
The flowing water convection coefficients, which are recommended by the Japanese Concrete Engineering Society, represent the convection coefficients as a function of velocity. When the velocity is 20~60cm/sec then the flowing water convection coefficient is as follows:
h_p=4.75u+43.0
where, u = velocity of low temperature liquid (cm/sec)
Selection
Enter the path of the pipe defined by nodes, which are specified in the direction of the flow.
2 Point : 2 end points are specified along which all the intermediate points are entered.
Picking : Select the path of the pipe by mouse clicks.
Node No. : User-specify the node numbers directly.