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Using Units

Using Units

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Units in TOP-Energy

TOP-Energy works generally with units: all inputs and outputs, numerical values and time series are provided with units. You will find the Basic Units, Derived Units, Constants, and possible Prefixes available in TOP-Energy under the respective links.

Use

The available units can be combined (multiplied and divided) or have a prefix as desired.

Thus, one megawatt can be written as MW, mwatt, or megawatt. This can even be expressed in SI units as:

mega kg m^2 / s^3

If the compatible unit you want is not yet in the drop-down list, you can simply write it directly in the unit field, e.g., MWh/a. If the unit is incompatible or not known in this notation in TOP-Energy, a warning will appear.

Due to the many possible combinations, there are some false friends. Thus, ha does not designate a hectare, as we would assume, but a century (hecto years). The hectare can be expressed as hectoare or hare.

Special Features

Absolute und Relative Units

Temperatures must be differentiated between absolute and relative units.

Absolute units have a fixed reference point, e.g., the absolute zero point at Kelvin. They may not be added, multiplied or divided.

The difference of absolute units is a relative unit. Relative units are without a fixed reference point, all arithmetic operations are allowed here.

Monetary Units

Euro and Cent are available as Monetary Units for a large and a small unit of money, which are converted in a ratio of 1:100. If another Currency is activated in the Localization settings, all monetary units in the control elements are replaced with it without conversion.

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