Forum Club Marconi - Genova

Forum Club Marconi - Genova
[ Home | Registrati | Discussioni Attive | Discussioni Recenti | Segnalibro | Msg privati | Sondaggi Attivi | Utenti | Download | Cerca | FAQ ]
Nome Utente:
Salva Password
Password Dimenticata?

 Tutti i Forum
 Forum tecnico: apparati, antenne &.........
 Modi digitali: Software&hardware
 Nuova Discussione  Rispondi
 Versione Stampabile Bookmark this Topic Aggiungi Segnalibro
I seguenti utenti stanno leggendo questo Forum Qui c':
Autore Discussione Precedente Discussione Discussione Successiva  

Utente Avanzato

220 Messaggi

Inserito il - 28 gen 2019 : 09:17:29  Mostra Profilo  Visita l'Homepage di Zhuyeqing Invia a Zhuyeqing un Messaggio Privato  Rispondi Quotando
Ventilation fans are tested using procedures specified by Air Movement and Control Association International Inc. (AMCA) [url=]Authentic Donte Jackson Jersey[/url] , Illinois, USA. The fan under test is mounted near the outlet of the test rig and air in-flow through the rig is varied by the movable gate assembly situated at the other end of the test rig.

Fan efficiency is defined as the ratio of air power (output) to shaft power requirement (input). An optimally designed fan impeller with improved aerodynamics requires less shaft input power for desired delivery of air volume with total pressure rise as per the system requirement. With reduced shaft power requirement, there is a commensurate reduction in energy consumption.

In a typical axial fan, the effective progress of the air is straight through the impeller at a constant distance from the axis. The primary component of blade force on the air is directed axially from inlet to outlet and thus provides the pressure rise by a process that may be called direct blade action.

The blade force necessarily has an additional component in the tangential direction [url=]Authentic DJ Moore Jersey[/url] , providing the reaction to the driving torque : this sets the air spinning about the axis independently of its forward motion.

The air delivering capacity of axial flow fans ranges from 100 to 500,000 cubic feet per minute (3,000 to 15,000 cubic meters per minute). Impellers usually have blades with airfoil cross-sections.

As compared to curved sheet blades [url=]Vernon Butler Jersey[/url] , aerofoils can apply greater force to the air, thereby increasing maximum pressure and can maintain better efficiency over a wider range of volumetric flow. Also by increasing the thickness & curvature of the inner sections, the blades can be made stiffer, this limits flutter and allows the impellers to be run at higher speeds.

Selection of a a right fan one should consider such factors like cost optimization [url=]Marquis Haynes Jersey[/url] , power rating & noise levels govern the selection of a fan suitable for a given application. Various combinations are possible to meet any given duty or operating requirements for best performance, lesser noise, power and cost characteristics.

Once the volume of airflow and the static pressure of the system are known, it is possible to specify a fan. The governing principle in fan selection is that any given fan can only deliver one flow at one pressure in a given system. To select a fan one must consider the following parameters:

- total airflow required

- total operating pressure

- fan installation space

Thus the fan efficiency is directly contingent upon selection of fan and the operating point relevant to the system resistance.

The way fan impellers (blades or rotors) are designed [url=]Ian Thomas Jersey[/url] , the amount of air they can move decreases as the pressure they are working against increases.

The airflow vs. pressure information for a particular fan is called the fan performance data. The performance of a fan depends on the size, shape & speed of the impeller. The fan performance data is essential for selecting fans as per the desired airflow and system pressure.

The airflow through the rig is determined by measurement of the pressure differential and simultaneous readings are taken of the static pressure developed by the fan, air velocity at the exit side, power consumed by the fan driving motor etc.

Fan performance curves and data show how much pressure and airflow a given fan can produce at a given speed. This data is based on the system resistance (pressure) occurring away from the fan. Fan performance curves are developed by fan manufacturers based on the testing of a prototype fan fabricated based on the theoretical design.

The axial flow fans are widely used for providing the required airflow for heat & mass transfer operations in various industrial equipment and processes. These include cooling towers for air-conditioning & ventilation [url=]Rashaan Gaulden Jersey[/url] , humidifiers in textile mills, air-heat exchangers for various chemical processes, ventilation & exhaust as in mining industry etc. All the major industries use large number of axial flow fans for operations, such as :

- Power generation

- Petroleum refining & petrochemicals

- Cement industry

- Chemicals & pharmaceuticals production

- Fertilizer production

- Mining manufacturing

- Humidification in textile mills

- building Ventilation [url=]Devin Funchess Jersey[/url] , etc..

For additional information please refer to

Oleg Chechel
Ventilation Equipment Designer
Industrial Blower Co.
Offering the most effective graphics and sounds as well as being a wide library of games, you are able to see why more and extra persons are buying the Xbox 360 video game controllers and why up till at this time, this video game console continues to be pretty well known and it is still rising in acceptance.

On account of the recognition on the Xbox 360, there are some those who do things to be able to make this machine a far more dynamic one particular. A single innovation right now is by making the Xbox 360 play backup copies of games. You might want to bear in mind a brand new and unique Xbox 360 might be unable to play backup discs or copies of the game. This video game console will only play authentic and pricey game discs.

Now [url=]Shaq Thompson Jersey[/url] , like a considerable Xbox 360 gamer, you would undoubtedly play with a particular game for hours on hours. In truth, a number of people even play up till the wee hours from the morning. This may place your highly-priced and unique copy of your game at threat of finding scratched. And, in some s. [url=]Cheap Jerseys China Online[/url] [url=]Cheap Jerseys[/url] [url=]Wholesale Jerseys From China[/url] [url=]Wholesale NHL T-Shirts[/url] [url=]Wholesale T-Shirts[/url] [url=]Wholesale NBA Hoodie[/url] [url=]Wholesale MLB Jerseys[/url] [url=]Wholesale Adidas NHL Hoodie[/url] [url=]Wholesale Football Hats[/url] [url=]Wholesale MLB Hats[/url]

  Discussione Precedente Discussione Discussione Successiva  
 Nuova Discussione  Rispondi
 Versione Stampabile Bookmark this Topic Aggiungi Segnalibro
Vai a:
Forum Club Marconi - Genova © Club G. Marconi Genova Torna all'inizio della Pagina
Questa pagina stata creata in 0,59 secondi. Versione 3.4.06 by Modifichicci - | PlatinumFull - Distribuito Da: Massimo Farieri - | Powered By: Snitz Forums 2000 Version 3.4.06