-
Categories CloudThis will be shown to users with no Flash or Javascript.
-
Directory Statistics
- Active Links: 84573
- Todays Links: 32
- Active Articles: 2544
- Todays Articles: 0
Free Directory SubmitArticle Details
Industrial Ventilation |
|
| Date Added: December 27, 2011 06:39:01 PM | |
| Author: Susan Terlit | |
| Category: Education: Instructional Technology | |
In contemporary office building, the heating ventilation and air conditioning system is designed to keep occupants comfortable and healthy by controlling the amount of outside air that is added to the building atmosphere, filtering both incoming and recirculated air to remove particulates and controlling the temperature. The HVAC system includes all heating, cooling, and ventilation equipment serving a building: furnaces or boilers, chillers, cooling towers, air handling units, exhaust fans, ductwork, filters, steam (or heating water) piping. A ventilation system consists of a blower to move the air, ductwork to deliver air to the room, and vents to distribute the air. A good ventilation design will distribute supply air uniformly to each area and especially areas with office machines. An effectively designed area will not have the supply and exhaust vent too close together because fresh air may be removed before it is adequately distributed throughout the area. Exhaust fans are often located a significant distance away from supply vents. A simple way to determine if the ventilation system is running a vent as a supply or an exhaust is by holding a tissue near the vent.] If the tissue moves, the air is being circulated and the direction the tissue is blown will determine the type of vent. Various building studies indicate that the most likely sources of this problem are - poor ventilation, poor thermal conditions, too high or low humidity, emissions from office machines, copiers and other building contaminants and poor ergonomic layout of workstations. Excessively high or low temperatures in an office area can also lead to symptoms in building occupants and reduce productivity. High temperatures have been associated with fatigue, lassitude, irritability, headache and decrease in performance, coordination and alertness. A number of factors interact to determine whether people are comfortable with the temperature of the indoor air. The activity level, age, and physiology of each person affect the thermal comfort requirements of that individual. Extreme heat, which is unlikely to be found in an office environment, can result in heat rash, exhaustion, and fainting. Workers who may be less alert or fatigued from a high temperature environment may be more prone to accidents. An inadequately ventilated office environment or a poorly designed ventilation system can lead to the build up of a variety of indoor air pollutants. Air pollutants can originate within the building or be drawn in from outdoors. Examples of sources that originate outside a building include: - pollen, dust and fungal spores - general vehicle exhaust - odors from dumpsters - re-entrained exhaust from the building itself or from neighboring buildings Examples of sources that originate from within the building include: - building components and furnishings - smoking - maintenance or remodeling activities (painting, etc.) - housekeeping activities - unsanitary conditions (standing water from clogged drains or dry traps) and water damage - emissions from office equipment or special use areas, like print shops, laboratories, or food preparation areas The following recommendations and guidelines are useful in preventing indoor air quality problems: * HVAC systems should receive periodic cleaning and filters should be changed on a regular basis on all ventilation systems. * The ventilation system should introduce an adequate supply of fresh outside air into the office and capture and vent point air pollutant sources to the outside. * Office machinery should be operated in well-ventilated areas. Most office machinery does not require local exhaust ventilation in areas that are already provided with 7-10 air changes per hour. Photocopiers should be placed away from workstations. Workers should vary work tasks to avoid using machines excessively. * Office equipment should be cleaned/maintained according to the manufacturer's recommendations. Properly maintained equipment will not generate unhealthy levels of pollutants. * Special attention should be given to operations that may generate air contaminants (such as painting, pesticide spraying, and heavy cleaning). Provisions for adequate ventilation must be made during these operations or other procedures, such as performing work off-hours or removing employees from the immediate area, utilized. Additional information can be found at the CB Blower company web site http://www.cbblower.com/coolair.html. Susan Terlitski Industrial HVAC Engineer CB Blower Co. http://www.cbblower.com/ilg.html http://www.cbblower.com/fanblower.html |
|
|
|
|
-
Featured Website
-
-
Twitter Ticker
My tweets
-
Latest Links
-
Latest ArticlesIndustrial Ventilation Systems
VOCs, or volatile organic compounds are emitted by a wide array of products and processes.
Meneghetti Award 2013
Néo presents an initiative promoted by the Antonio Meneghetti Scientific and Humanistic Research Foundation.
