Technical efficiency measurement command _ What is a technical efficiency measurement command?

What is the efficiency calculation formula?

The formula is: η = w (with) /w (total) = p (with) /p (total), η < 1. The symbol of efficiency is η and the symbol of work is w.

Efficiency refers to the ratio of useful power to driving power, and it also has many meanings. There are many kinds of efficiency, such as mechanical efficiency and thermal efficiency. Efficiency is not directly related to the speed of doing work.

Given the input and technology, it is also a simplified expression of distribution efficiency that economic resources are not wasted or used to the maximum extent.

Efficiency connotation

1. refers to the workload actually completed in unit time. Therefore, the so-called high efficiency means that the workload actually completed per unit time is much, which is to save time for individuals.

2. It is the ratio of output wattage to input wattage. If this number is closer to 1, it means that it is more efficient. The general efficiency of online UPS is about 70%~80%, that is, the input is 1000W, the output is about 700 W ~ 800 W, and the UPS itself consumes 200 W ~ 300 W.. The efficiency of offline and online interactive UPS is about 80%~95%, which is higher than online UPS.

3. Efficiency refers to the optimal allocation of limited resources (such as raw materials, human cash, etc.). ). When certain standards are met, efficiency is said to have been achieved.