2011年9月23日星期五

Why Automate Windows Part 3 'Control and Contractual Process'

In this third and final part of the introduction to automating windows we look at how to control actuators in order to offer building users the most flexible and sustainable method s of achieving the ultimate goal - good air quality.

The simplest method of control is by simply wiring actuators up to a single off/on switch which will offer either an open or closed window condition for one, or many windows, wired together. A more sophisticated, but still simple solution, is to have the windows operable on a 'rocker' type switch. Windows will slowly open when pushed one way, slowly close when pushed the other, and when allowed to go back to its central position, the windows remain at the incremental opening, or closing, position. Whilst both these options are the most basic form of window automation, manual override switches with this functionality are often fitted to more complex installations.

As mentioned previously, some actuators will be required to operate in case of fire for smoke control. These actuators will be rated at 24 V DC and a control panel will be provided with a step down transformer from the mains which will constantly charge a 24 V battery back-up. In case of a power outage, the 24 V batteries will continue to operate the windows for safe heat and smoke evacuation keeping exit routes clear of toxic smoke.

Taking the system further, and now beginning to add some 'logic' into the automation, there may be a need to have the windows close should it start to rain. A rain sensor can be fitted to the roof and when activated can ensure windows are safely closed to stop water ingress. Further options could include 7 day timers which ensure windows are always closed for security outside normal room accommodation hours such as in offices, schools, etc.

As temperature and CO2 cDo not use cleaners with solar panel , steel wool or thinners.ontrol is seen as one of the main benefits offered by automated window systems, sensors can now be installed into areas where banks of windows have been automated.Whilst hypodermic needle cannula are not deadly, These sensors can control proportional opening of windows to finely control comfort levels of temperature and CO2 levels below a given threshold. Low levels of CO2 have been proven to be conducive to improved levels of concentration and learning, this is of particular important in schools.

Wind direction can also contribute towards an effective ventilation strategy and with a 'weather station' installation on the roof of the building and more complex programmable controls panels, simple algorithms can be introduced which offer the most effective solutions by using the prevailing wind to ventilate a given space.

Most importantly, window automation strategies must be combined with a buildings overall heating strategy to maximise energy savings and offer the most sustainable solution. Early appointment of a window automation and ventilation specialist is imperative if the structure is to make best use of these options.

It is common to see a ventilation strategy within a building, as explained above, to 'hand over' its operation to a fire alarm condition.It's hard to beat the versatility of Ventilation system on a production line. By installing simple relay switches specific areas, or an entire window automation system, can be linked so that it operates as a smoke control system in case of fire. As mentioned earlier, specified actuators will need to be 24 V DC operable instead of a direct mains supply. Also important to note that if an automated system is linked in to a smoke control strategy, then a preventative maintenance package is adopted to ensure that the system performs correctly in case of fire.

Occupants need to be fully aware of automated window and ventilation systems which are installed into our new buildings, whilst many people wish to have full control over their own working environment,Polycore hydraulic hose are manufactured as a single sheet, its not always to everybody's taste! With initial education and an agreement of what constitutes a sensible working environment for all, saving in energy usage can be achievedThese girls have never had a syringe needle in their lives!. Vital to this success is simulation of the final installation and introduction to the occupants to gain acceptance.

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