Fans, consisting of multiple rotating blades powered by a motor, are used to move air in a variety of common residential and commercial applications. They are sold as part of a packed appliance (e.g., refrigerator) or building system (e.g., central heating and cooling) or independently (e.g., ceiling fan). There are 2 basic types of fans: …
Horsepower vs Speed Characteristics. There are three basic principles of fan operation which can serve to aid in understanding and finding solutions to motor application problems. These are speed, pressure and air density. It can be stated that the horsepower input to a fan varies as the cube of the speed, with the other factors …
Comparison Between Fan Horsepower and Other Characteristics Read More »
There are two basic types of air moving devices:the axial flow fan,and the centrifugal fan or blower,. Generally speaking, the centrifugal fan creates higher pressures than that of the axial flow fan and is applied on jobs with higher resistance to the air flow. Axial Flow Fan. There are three basic types of axial flow …
Introduction of Centrifugal Fan or Blower, and Axial Flow Fan Read More »
INTRODUCTION The words “fan” and “blower” are frequently used interchangeably. In HVAC/R terminology, the term fan may refer to any device used to create artificial currents of air. A blower is generally considered to be a particular type of fan–specifically, a motor-driven centrifugal fan that delivers air to the conditioned space under pressure. There are …
As we already know, fan selection is a complicated process that starts with a basic knowledge of system operating requirements and conditions such as airflow rates, temperatures, pressures, airstream properties, and system layout. The variability of these factors and other considerations, such as cost, efficiency, operating life, maintenance, speed, material type, space constraints, drive arrangements, …
Introduction Fans and blowers provide air for ventilation and industrial process requirements. Fans generate a pressure to move air (or gases) against a resistance caused by ducts, dampers, or other components in a fan system. The fan rotor receives energy from a rotating shaft and transmits it to the air. Difference between Fans, Blowers and …
Fan selection is a complex process that starts with a basic knowledge of system operating conditions: air properties (moisture content, temperature, density, contaminant level, etc.), airflow rate, pressure, and system layout. When selecting a fan, the following information must be known. Volume of air to be moved per unit time Static pressure-the estimated system resistance …
Precise determination of air-flow and required outlet pressure are most important in proper selection of fan type and size. The air-flow required depends on the process requirements; normally determined from heat transfer rates, or combustion air or flue gas quantity to be handled. System pressure requirement is usually more difficult to compute or predict. Detailed …