variable frequency control of unit boiler feed water pump

Design and application of variable frequency constant ...

Nov 21 2015 · Finally a designed practical example by the variable frequency control technique is given on the auxiliary boiler feed water pump. It is proved that the proposed method can maintain constant pressure water for closed system pumps and is an ideal efficient measure for energy savings and maintenance benefits.

Learn More

Pumps-to-System Control of Power Plant Boiler Feed Pumps

Jan 23 2018 · The feed water control valve position is determined by a so-called three-element controller: steam flow rate (feed-forward) feed water flow rate; drum level; 2. In general the power plant boiler feed pump is sized to provide full feed water flow plus some amount of spray water all at maximum continuous rating (MCR).

Learn More

Pump Control with Variable Frequency Drives | Pumps & Systems

Dec 17 2011 · An AC drive provides more efficient flow control by varying the pump motor speed. By comparing the energy requirements and costs when a throttling device is used for flow control on a centrifugal pump with the power used when an variable frequency drive (VFD) is used to control the same flow the potential savings become evident. Figure 2

Learn More

Variable frequency drive for centrifugal pump

The boiler feed water capacity must vary with the steam demand but the pressure or head must remain constant. ... Single VFD for Multiple Motors A single variable frequency drive (VFD) may control 2 or 3 motors at a time multiple motors control is usually

Learn More

Pump Control with Variable Frequency Drives | Pumps & Systems

Dec 17 2011 · An AC drive provides more efficient flow control by varying the pump motor speed. By comparing the energy requirements and costs when a throttling device is used for flow control on a centrifugal pump with the power used when an variable frequency drive (VFD) is used to control the same flow the potential savings become evident. Figure 2

Learn More

Variable frequency drive for pumps - Gozuk

Variable Frequency Drive (VFD) for Pumps Like fans using a variable frequency drive (VFD) to control the flow rate from a pump rather than using simple throttle control can result in large power and therefore cost savings.This is illustrated in following Figure

Learn More