Do you work in a city with tall buildings and skyscrapers? Ever wondered why it can seem so much windier?
When the wind hits a tall building head-on, it must go somewhere. Part of it is deflected upwards and to the sides, but a significant portion flows downward through a phenomenon called the downdraught effect.
This descending air can cause cold gusts once it reaches the street level, posing a risk for pedestrians. It is important to note that the downdraught effect is diminished in low-rise buildings, but becomes significant in cities where vertical construction is common.
With so much air flowing towards the ground around tall buildings, the streets can become very windy.
There are two main ways to control this. The building can be designed with architectural features that reduce downdraught, or landscaping can be used to help dissipate airflow.
There are several reasons why the streets around skyscrapers tend to become windy:
For buildings that have already been built, screens can be deployed to protect pedestrians from the wind at street level. The use of trees and hedges can also help break downwind patterns.
Measurements are the only way to determine if wind speed and temperature are at a level that can cause discomfort or pose a risk to pedestrians. They can also be used to validate the effectiveness of architectural or landscaping measures intended to mitigate downdraught. According to a pedestrian level wind study carried out in Canada in 2011, wind speeds in excess of 8.3 m/s make walking uncomfortable, and anything above 25 m/s is considered dangerous.
Any monitoring system that is deployed outdoors in a windy location must be suitable for the task at hand. It must be capable of resisting dust and rainfall while being capable of long distance communication.
WINDCRANE offers this plus a long-lasting battery and memory, complemented with cloud computing capabilities to ensure that data is not lost in the unlikely event that the unit is damaged on-site.
WINDCRANE technology builds on the expertise of Logic Energy, a company with a decade of experience providing monitoring solutions for various weather and energy applications. We have the technical know-how with respect to both hardware and software and capitalise on this to provide integrated solutions.
A tough and accurate wind monitoring solution; WINDCRANE mini is a plug and play device that allows you to focus on projects without wasting time on complex installations. After setup, just log into the WINDCRANE mobile App and see it working live. You can access the system from anywhere, even while on the move between projects.