for each individual that is necessary
Wysłany: 10 Styczeń 2018, o 02:25Tenderall 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 http://www.brownsrookiesproshop.com/joel-bitonio-browns-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, 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, 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, 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, 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 Quantity and quality of sensual activity are sometimes related, and there is definitely a threshold of frequency for each individual that is necessary to maintain sensual happiness. But can the frequency of a man’s sensual activity have other benefits beyond helping to maintain that all-important male organ health? Interestingly enough, recent evidence suggests there may be a link between sensual activity and memory – and the link seems to be positive.
Good sensual activity, good memory
People often talk about “mind-blowing sensual activity,” but some scientists think intimacy has the opposite literal result – it makes it easier to remember things. How so?
As with so many things involving science, it all starts with animal studies. A study published in 2013 looked at rats and the effect sensual activity had on the hippocampus region of the brain. The hippocampus is an area crucial for memory function and retention. The scientists studied what happened when rats had sensual activity and found that one result was an increase in neural activity in the hippocampus.
Now a human study has indicated the same may be true of humans. While this was a small trial involving only 78 people – all of them women – it does support the information found in the animal studies.
The study
Published in the Annals of Sensual Behavior, the study was conducted by investigators at McGill University. The scientists interviewed study participants and asked them how often they engaged in male organ-female organ coupling. The participants then took a test which assessed their ability to memorize words and faces. In general, women who had sensual activity more frequently did a better job of memorizing words than did women whose rate of intimacy was less frequent.
There wasn’t much difference between the two groups, however, when it came to memorizing faces. But that outcome actually supports the theory that the neural activity in the hippocampus is increased from sensual activity.<. Cheap Nike NFL Jerseys Cheap Jerseys Cheap Jerseys China Wholesale Jerseys China Wholesale Jerseys From China Wholesale NFL Jerseys Wholesale NFL Jerseys Wholesale MLB Jerseys Wholesale Jerseys From China Cheap Authentic NFL Jerseys
Negative Air Pressure in industrial manufacturing facilities can create problems such as:
* Exhaust fans losing performance http://www.brownsrookiesproshop.com/joel-bitonio-browns-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, 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, 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, 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, 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 Quantity and quality of sensual activity are sometimes related, and there is definitely a threshold of frequency for each individual that is necessary to maintain sensual happiness. But can the frequency of a man’s sensual activity have other benefits beyond helping to maintain that all-important male organ health? Interestingly enough, recent evidence suggests there may be a link between sensual activity and memory – and the link seems to be positive.
Good sensual activity, good memory
People often talk about “mind-blowing sensual activity,” but some scientists think intimacy has the opposite literal result – it makes it easier to remember things. How so?
As with so many things involving science, it all starts with animal studies. A study published in 2013 looked at rats and the effect sensual activity had on the hippocampus region of the brain. The hippocampus is an area crucial for memory function and retention. The scientists studied what happened when rats had sensual activity and found that one result was an increase in neural activity in the hippocampus.
Now a human study has indicated the same may be true of humans. While this was a small trial involving only 78 people – all of them women – it does support the information found in the animal studies.
The study
Published in the Annals of Sensual Behavior, the study was conducted by investigators at McGill University. The scientists interviewed study participants and asked them how often they engaged in male organ-female organ coupling. The participants then took a test which assessed their ability to memorize words and faces. In general, women who had sensual activity more frequently did a better job of memorizing words than did women whose rate of intimacy was less frequent.
There wasn’t much difference between the two groups, however, when it came to memorizing faces. But that outcome actually supports the theory that the neural activity in the hippocampus is increased from sensual activity.<. Cheap Nike NFL Jerseys Cheap Jerseys Cheap Jerseys China Wholesale Jerseys China Wholesale Jerseys From China Wholesale NFL Jerseys Wholesale NFL Jerseys Wholesale MLB Jerseys Wholesale Jerseys From China Cheap Authentic NFL Jerseys