Cooling pipes/Heating cables

Several circuits can be defined. Each circuit should have a user-defined name.

The layout of each circuit is described by a number of consecutive stretches. Each stretch is a straight line connecting two point in the xyz-coordinate system.

When editing the table you can use the INSERT-, DELETE- , TAB-, ENTER-keys and use copy and paste from the clipboard

It is possible to load input-data from external data-files.

Even if you "connect" circuits by letting them cross each other or begin or end at the same points, the circuits will not be connected. One circuit is one string of consecutive stretches.

The time for switching the circuit on and off should be defined.

Cooling Pipes

In addition following should be defined for cooling pipes:

- Internal and external diameter of the pipe

- The flow of cooling media.

- The type of pipe (thermal conductivity, internal and external diameter).

In the calculation the flow is assumed to be turbulent. If the Reynolds number is lesser then 2000 a warning will be generated.

The cooling media is assumed to be water.

On stretches where the pipes not are embedded, the exchange of energy with the surroundings is assumed to be zero (in other words the pipes should be well insulated).

Type of cooling pipe

The circuit can work in 3 different ways:

• As an open circuit with a known inlet-temperature. Examples are groundwater, water from lakes, rivers and seawater. In this case the inlet-temperature should be defined.
• As a closed circuit. Typically the circuit will pass through, both former casted and newly casted structural parts. In that way the heat of hydration is distributed to the whole structure and differences in temperature and eigenstrains will be reduced, and the maximum temperature level is lowered.
• As a closed circuit with a cooling plant. A target-temperature of the cooling water and a maximum effect of the plant (on the actual circuit) should be defined. In this case the outlet water will be reduced to the target-temperature if the necessary effect is present. Otherwise the temperature is reduced corresponding to the present effect. If the temperature is lower than the target-temperature no energy is removed.

The pipes can also be used as heating pipes. In the third case, this is done by specifying an effect with a negative sign. In that case the temperature, considering the present effect, will rise until the target-temperature is reached.

Heating Cables

In addition the type of heating cable should be defined (external diameter and effect per length-unit)

General

Both cooling pipes and heating cables can be imported from and exported to libraries. In that way the pipe/cable can be reused in different jobs. Together with the software are delivered examples on pipes/shields, which are ready to use.

Cooling pipes/heating wires are shown graphically, simultaneously with specifying the coordinates. Graphic selection of a node, identifies the corresponding row in the coordinate table. The node, in the active row in the table, is marked on the structure with the directions of the global axes.