Вдогонку, оттуда же
Oct. 16th, 2010 10:31 pm![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png){kind=small}
curiouslIn addition, evidence shows that operating costs typically amount to three times the capital cost of the building; and maintenance costs can be twice the building costs.
Two thirds of all the electricity consumed by industry goes into powering electric motors. This statement is true for just about every industrialised nation in the world. It is also true that in most countries no more than 10% of these motors are controlled.
Many fluid power applications (hydraulics, pneumatics and other air movement) can present opportunities for savings.
For example, many processes still use mechanical vanes and vents to route air to atmosphere when it is not required. An easily installed VSD can be used to control turning the fan on or off. Moreover, such fan arrangements frequently use configurations (such as centrifugal fans) that can be slowed down without significant loss of performance. Consider that a 22kW fan that is reduced in speed from 50Hz to 47Hz could save double its price and installation costs in the first year!
Two thirds of all the electricity consumed by industry goes into powering electric motors. This statement is true for just about every industrialised nation in the world. It is also true that in most countries no more than 10% of these motors are controlled.
Many fluid power applications (hydraulics, pneumatics and other air movement) can present opportunities for savings.
For example, many processes still use mechanical vanes and vents to route air to atmosphere when it is not required. An easily installed VSD can be used to control turning the fan on or off. Moreover, such fan arrangements frequently use configurations (such as centrifugal fans) that can be slowed down without significant loss of performance. Consider that a 22kW fan that is reduced in speed from 50Hz to 47Hz could save double its price and installation costs in the first year!
