| Vorige onderwerp :: Volgende onderwerp |
bears123
Geregistreerd op: 24 Mei 2018
Berichten: 787
|
 Geplaatst: 17-11-2018 10:10:53 Onderwerp: T.J. Green Jersey |
 |
|
|
LOS ANGELES Tyquan Lewis Jersey , Nov. 4 (Xinhua) -- The global toll of chronic kidney disease (CKD) attributable to air pollution has reached more than 10 million each year, a new study revealed.
The study was presented by the American Society of Nephrology Kidney Week 2017 October 31-November 5 in New Orleans, Louisiana.
The researchers from Clinical Epidemiology Center at the VA Saint Louis Health Care System previously described an association between increased levels of fine particulate matter and risk of developing CKD Kemoko Turay Jersey , but then the investigators used the Global Burden of Disease study methodologies in the latest research to estimate the burden of CKD attributable to air pollution.
Results from the study suggests that the burden varies greatly by geography, with higher values seen in Central America and South Asia.
"Air pollution might at least partially explain the rise in incidence of CKD of unknown origin in many geographies around the world, and the rise in Mesoamerican nephropathy in Mexico and Central America Braden Smith Jersey ," lead researcher Benjamin Bowe was quoted as saying in a news release.
Tenderall Fan Co. developes Make-Up Air Unitss for larger industrial plants ventilation requirements.
Negative Air Pressure in industrial manufacturing facilities can create problems such as:
* Exhaust fans losing performance, as the building pressure becomes negative.
* Pilot light outages and exhaust system failure on natural draft gas equipment.
* Cold air drafts and infiltration of dirt and contamination from outside.
* Difficulty opening or closing exterior doors.
Tenderall Co. air-handling units (AHU) can be used effectively for negative pressure control at manufacturing facilities:
Space Pressure Control is used to minimize and control the exchange of air between the building and the outside environment or from one building area to another. This may be accomplished in three ways:
- Constant air supply with variable-speed exhaust;
- Variable air supply with constant-speed exhaust;
- Variable Return-Air.
Constant air supply with variable-speed exhaust is recommended where a hot or contaminated environment must be ventilated while maintaining room pressure. Unit may be interlocked to that it only operates with the exhaust system.
Variable Air Supply with constant-speed exhaust may be preferred where fume exhausters or fume hoods are used to provide critical ventilation of contaminants from a “clean” environment while make-up air is used to maintain a positive pressure to prevent infiltration.
In either case, when the system is enabled Darius Leonard Jersey , a pressure sensor in the building space monitors room pressure. When a high or low pressure reading is detected, the air supply or exhaust is adjusted to compensate.
When controlling a Variable Air Supply unit (or VAV Unit - Variable Air Volume), two methods are available:
- Damper Control - Unit discharge damper is adjusted using the damper motor.
- VFD (Variable Frequency Drive) – Controller adjusts the speed of the blower motor Discharge Damper adjustment is an older method of controlling discharge air volume. Its main advantage is that it only requires positional control of a small discharge damper motor. The major disadvantage is the wasted Horsepower of the blower motor at lower delivery rates.
In recent years Quenton Nelson Jersey , fan speed control using VFDs has become economical. In this application, a standard energy efficient motor is usually adequate down to 75% of normal motor speeds. For a fan speed down to 25%, a premium efficiency motor is required. Inverter duty motors are not usually necessary since at 25% of normal fan speed Jacoby Brissett Jersey , air delivery is minimal.
Variable Frequency Drives are also programmable. They are used to provide soft starts and to ramp motor speed up or down in response to signals from the control system.
Finally, in a generally “clean” environment without a critical need to remove large quantities of contaminants, a simple solution to building pressurization is a Return Air Unit with the return air damper motor controlled by building a pressure sensor. When building pressure increases T.J. Green Jersey , more inside air is returned through the unit, relieving the pressure. When building pressure falls, more outside air is supplied to the building in order to “pump up the pressure”. Precise control of building pressure by a single piece of equipment can thus be achieved.
Additional information can be found at the Tenderall company web site http:tenderallahuindex.
Oleg Chetchel
Industrial and Commercial Air Systems Engineer
Tenderall Fan Co.
http:www.tenderallfanblowerindex
http:tenderallairhandlerindex Reputed transformer manufacturers for all custom size and standard transformers for buildings Marlon Mack Jersey , industrial houses, manufacturing sites. Avail free consultation to meet your specific needs.
Energy has now bigger roles in our lives. On the other hand power is the backbone of industries and commercial establishment. It is due to consistent demand of electricity from all walks of communities that role of transformers manufacturers is now more vital. In need of energy saving manufacturers have to consistently design innovative transformers that are easy to operate and have higher capacity to withstand sudden power fluctuations that might occur during the course of electricity distribution.
What Transformer Manufacturers Do?
Well, most of us consider transformers manufacturers to design and deliver transformers and that is all. However Tarell Basham Jersey , there’s a lot they do besides manufacturing transformers. Transformers manufact. Drew Brees Jersey David Johnson Jersey Dallas Goedert Jersey Authentic Bradley Chubb Jersey Alex Smith Womens Jersey Adam Thielen Womens Jersey Aaron Rodgers Youth Jersey Von Miller Youth Jersey Tom Brady Youth Jersey Todd Gurley II Rams Jersey |
|
| Terug naar boven |
|
|
|
Je mag geen nieuwe onderwerpen plaatsen in dit subforum
Je mag geen reacties plaatsen in dit subforum
Je mag je berichten niet bewerken in dit subforum
Je mag je berichten niet verwijderen in dit subforum
Je mag niet stemmen in polls in dit subforum
|
Wilt u geen reclame op dit forum en genieten van extra voordelen? Klik dan vlug hier voor meer informatie!
|
|
|
|
|
