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| Articles by Oleg Chetchel |
51. Modulating Power Steam Humidifiers
December 24, 2011
An appropriate humidity level in every residential and commercial building can not be over-estimated. Humidity becomes the most important factor for everyone's comfort while inside a closed heated space, especially during winter time.
If the air in the house does not contain enough moisture,...
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52. Wall Exhaust Fans for Building Ventilation
December 05, 2010
When sizing an exhaust fan that does not open directly to the outside but is ducted, it is important to ensure that the exhaust fan has the capability to move stale air throughout the duct and ultimately to the outside. Here, we first need to understand what static pressure and equivalent duct lengt...
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53. Cast Aluminum Regenerative Blowers
November 29, 2010
The specifications to consider when selecting regenerative blowers include: maximum free air delivery, maximum pressure, and motor power. Free air delivery (FAD) is the actual air produced by the compressor pump at the rated pressure. Maximum FAD is usually rated at a pressure somewhat less than the...
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54. Industrial Building Ventilation
November 29, 2010
Air enters office buildings or spaces through both mechanical ventilation systems as well as naturally through leaks around windows, doors, etc. Newer, larger buildings which are highly energy efficient due to sealed windows and heavy insulation primarily depend on mechanical ventilation. Older, sma...
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55. Process Ventilation with Fans and Blowers
November 23, 2010
Industrial process fans include several types such as duct fans, roof and ceiling ventilators, wall mounted fans, pressure blowers, and freestanding units with different mounting options. For extreme conditions and plants, drum fans can be used to move even larger amounts of air. These types of fans...
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56. Industrial Side Channel Blowers
November 21, 2010
A regenerative blower operates as a multistaged compressor. Each blade-to-blade regeneration stage results in a slight pressure increase. Total pressure rise from air entry to discharge yields a continuous operating pressure up to 300-in. w.g. (11 PSIg) or a vacuum to 14-in. Hg with continuous flows...
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57. Ventilators, Blowers and Fans for Industrial Use
November 16, 2010
Industrial blowers are mainly used to circulate the movement of air and gas in ventilation applications. Their main function is to replace impure or contaminated air with fresh air by swirling it around. Almost every industry, including agricultural, chemical, medical, oil and gas, automotive, food ...
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58. Inline Fans for Building Ventilation
November 16, 2010
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.
In a typical axial fan, the effective progress of the air is straight through the impeller at ...
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59. Fans for Building Ventilation
November 16, 2010
In many dryer applications, the static pressure requirement is between 0.5 and 3" 0f water column. For these pressure requirements, a duct vaneaxial fan often is the best selection. The duct vaneaxial fan offers a broad performance range and good pressure capability at high static efficiency. It als...
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60. Industrial Power Roof Ventilators
October 16, 2009
A reliable ventilation system that can operate during a fire is both vital and essential. It prevents smoke logging, allows people to escape quickly, minimizes damages to property and contents and enables firemen to attack the fire without hindrance. Such power roof ventilators have the added advant...
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Author: Oleg Chetchel
