Plant use factor is Average demand/plant capacity.

The plant use factor is a measure of how much of the total capacity of a power plant is utilized on average. It is calculated by dividing the average demand for power by the plant's capacity.

Mathematically, the plant use factor can be expressed as:

Plant use factor = Average demand / Plant capacity

Here, the average demand is the average amount of power required by the consumers over a given period, such as a day or a month. The plant capacity is the maximum amount of power that the plant can generate.

For example, if a power plant has a capacity of 100 MW and the average demand for power over a day is 75 MW, then the plant use factor would be:

Plant use factor = 75 MW / 100 MW = 0.75 or 75%

This means that on average, the power plant is operating at 75% of its maximum capacity. A high plant use factor indicates that the power plant is being used efficiently, while a low plant use factor indicates that there is excess capacity that is not being utilized.