What is FD fan?
A forced-draft (FD) fan is a type of pressurized fan that gives off positive pressure within a system. It is mainly used in industries that employ boiler systems in order to promote boiler efficiency, but it has a wide range of applications.
What are the function of FD and ID fan?
An ID fan removes flue gases from a boiler and forces exhaust gas up a stack. Nearly every ID furnace operates with a slightly negative pressure. Forced draft (FD) is achieved by forcing air into a furnace with a special fan and ductwork. Often, air is heated prior to entering a boiler to increase overall efficiency.
What is FD fan in thermal power plant?
The Induced Draft (ID) fans and Forced Draft (FD) fans provide control for draft and forced air zoning of fuel burned furnaces of steam generation plant of a thermal power plant. Forced Draft (FD) fans are used for supplying the combustion air into the furnace of a boiler.
What is the work of ID fan?
An induced draught fan (ID fan) is provided to maintain a negative pressure in the furnace by sucking the products of combustion from it with a slight positive pressure at the discharge end vis-à-vis the bottom of the chimney/stack.
What is the function of FD fan?
Forced Draft Fans (FD) supply the air necessary for fuel combustion by pushing air through the combustion air supply system and into furnace. These fans are located at the inlet of boiler to push high pressure fresh air into combustion chamber, where it mixes with the fuel to produce positive pressure.
How does blower fan work?
Air blowers work like reverse windmills. They have a bunch of blades attached to a rotor, which is called an impeller. These spinning blades suck in and drag air with them – typically brought in from the sides or top of the blower. The air accelerates up with the blades, before shooting out an opening at high speed.
How is fan RPM ID calculated?
Calculate the CFM (volumetric flow of air) at 1,200 rpm. The volume of the column of air described in Step 2 is pi (3.1416) x fan radius squared (0.5-feet squared) times the column length in feet. This would be 3.1416 x 0.25 square feet x 800 feet = 628.32 cubic feet per minute at 1200 rpm.
Which motor is used in ID fan?
3.2 Kw Motor ID Fan
| Power | 3.2 kW |
|---|---|
| Power Source | Electric |
| Voltage | 240 V |
| Frequency | 50 Hz |
| Phase | Three Phase |
What is difference between ID fan and FD fan?
The key difference between a forced draft and an induced draft fan is, FD fan forces outside air into the heating system whereas ID fan draw flue gases from the system out into the atmosphere. ID fan creates negative pressure or suction to discharge the gases out after combustion from the furnace.
What is difference between blower and fan?
Key difference: Both, fans and blowers, are mechanical devices used for circulation of air. Generally, a fan is an electrical device that moves air, whereas a blower is a mechanical device that consists of a fan, and which channels the air from the fan and directs it to a specific location or point.
Which motor is useful for blower and fan?
Induction motors — or (in the context of blowers in particular) often called by the more playful squirrel-cage motors (to avoid confusion with inducer-blower products). In fact, these motors are the most common used in blowers today, as they excel in high-horsepower blower and cooling-fan applications.
