With the rise of global energy prices, the introduction of energy-saving and emission reduction policies around the country, and the strengthening of people's awareness of environmental protection, how to effectively reduce energy consumption, improve energy efficiency, and reduce carbon dioxide emissions have become more and more issues of concern to us. Below, I will make a simple system overview of the new technology that relies entirely on natural light to illuminate the room, the intelligent daylighting system.
The intelligent daylighting system is a technology that introduces sunlight into the room through the front-end capture, intermediate transmission and back-end slow-shooting principles. There are two main ways to capture the capture technology of the system. Active and passive, the active is to actively locate the sun position, and then collect the sunlight. This positioning is usually through GPS satellite positioning, photosensitive sensors or relying on the annual average of each region. The solar trajectory path defines the walking path of the sun. Although the GPS and the photosensitive sensor are relatively accurate, they increase the operation and equipment cost. The method of presetting the average walking path may have a certain trajectory with the actual solar running. Access, but reduced equipment and operating expenses; passive, passively introduces sunlight through a fixed path, that is, when light is shining on the hood part, the lighting part begins to reflect and refract light to the transmission part. . Passive acquisition part, how to collect light, how to capture low-angle non-solar light collection is a relative problem, all daylighting companies are looking for solutions, in comparison, by loading some stronger on the face The technique of bending the light on the refracting surface is an effective method, which makes it easy to introduce the evening light into the room.
So what is the difference between active and passive? Which method is more appropriate for a specific project? Here are two differences and comparisons between active and passive:
First of all, the cost aspect. Active cost and post-maintenance costs are relatively passive, why is the maintenance cost later? Because the active acquisition part adds more mechanical structure to follow the sun's rotation, the introduction of the mechanical structure increases the cost invisibly, and also causes the possibility of failure and maintenance in the future, so that the maintenance cost will naturally increase. Passive, because there is no mechanical part in the acquisition device, there is almost no maintenance cost input in the later stage, and the possibility of damage is also reduced.
Second, the introduction of low-angle light. When the illuminance is not strong, the active acquisition part cannot accurately search the sun position.