hrough the ""Death Group"" as

in Dies ist ein Forum in der Kategorie 25.01.2019 08:37
von zhangsan520 • 552 Beiträge

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 Zay Jones Jersey , 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 Tre'Davious White 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) Tremaine Edmunds Jersey , 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, fan speed control using VFDs has become economical. In this application Josh Allen Jersey , 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 Cheap Buffalo Bills T-Shirts , 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 Cheap Buffalo Bills Hoodies , 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, more inside air is returned through the unit Customized Buffalo Bills Jersey , 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:tenderallairhandlerindex "
RIO DE JANEIRO, Aug. 3 (Xinhua) -- Chinese men's basketball team head coach Gong Luming hoped that their team can gain valuable experience through the ""Death Group"" as the team arrived here for the Rio Olympics on Wednesday.

""We feel no pressure. This is a valuable experience for Chinese basketball, and we cherish that a lot. We can learn about how far we are away from those top-level teams,"" said Gong.

China have lost to the United States, Australia and hosts Brazil during the past ten days in their build-up for the Olympic campaign.

But Gong said that these warmup matches taught the team a good lesson in terms of what they lack against these strong opponents. Undoubtedly, that was a huge help in their preparation for the Olympics.

""We have been in the crucial phase of our preparation. The warmup series helped us a lot, and gave more experience to our young players,"" said Yi Jianlian, a former NBA player.

With an average age of 23, China were placed in Group A with defending champion USA, Australia, Venezuela, Serbia and France. They will kick off their campaign against the ""Dream Team"" on Saturday.

" Tweet

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