Energy consumption in commercial buildings is expected to drop significantly. The energy requirements of buildings are becoming more and more stringent, and commercial lighting system integrators are beginning to combine the building's original HVAC control network with the lighting system to allow the control center to automatically use the space. Condition and lighting conditions, adjust temperature and brightness to improve energy efficiency.
Since the lighting system in the building consumes a lot of energy, the relevant regulations have been revised and the lighting energy loss has to be reduced, which will affect the design and application of the lighting system. In the past, the energy control of lighting systems was difficult to manage, and the switches had to be manually operated. Although a small amount of space has been automatically controlled by low-cost passive infrared (PIR) sensors, there is still a lot of energy to reduce energy consumption and improve the building lighting control system to provide a comfortable environment and good experience. Great effort space.
It is unrealistic for major countries around the world to reduce energy consumption in an all-round way, and building more power plants will cost a lot of money. State governments like California, which follow the country's advanced environmental protection, stipulate that in the next 10 years, the goal of significantly reducing energy consumption should be achieved. The California Global Warming Resolution Act (AssemblyBill32) requires buildings to reduce energy consumption by 50% by 2018. Other building regulations such as the California "sTitle24" further stipulate that daylight harvesting and automatic lighting control of windows and skylights Energy saving. Of course, the United States is not the only government that wants to improve energy efficiency in commercial lighting. The EU is currently discussing a plan to eliminate ineffective light bulbs and develop commercial lighting regulations that require time to control automation.
A new generation of LED lighting systems came into being
First, a brief look at where energy is used: 40% of lighting bills in a traditional commercial building's electricity bill; commercial lighting accounts for nearly 70% of all lighting energy used. Other energy sources, including HVAC systems, account for 40% of energy used in commercial buildings and 20% of other commercial projects such as electric motors.
The HVAC system was adopted by the building network control in the 1980s, and the patented FieldBus network such as ProfiBus evolved into a standard network like BacNet used to connect HVAC systems. BACnet is an ASHRAE, ANSI and ISO standard agreement for building automation and network management. It not only allows system automation, but also heating, ventilation, air conditioning control, lighting control, access control, fire detection systems, and other application-related control systems.
It is only natural that lighting and HVAC systems are centrally controlled by the network. What systems can control lighting better than existing building control networks?
Today's lighting systems are developed from pulse-width-modulated (PWM), single-junction field-effect transistors (FETs), resistors, capacitors, sensors, and other difficult-to-control discrete power components, so as in the past, various technological revolutions, lighting The system also needs to be reformed to enter a new era of digitalization.
Connecting and integrating power electronics with a network that controls lighting will dramatically reduce energy consumption for next-generation lighting systems such as light-emitting diodes (LEDs).
HVAC/light management is smarter with building control network
If the brightness of the lighting system is adjusted from 0 to 100%, it is also connected to the building's control network, which not only meets the needs of use, but also develops into a building autonomous control system (Figure 2). In addition, smart sensors that can detect space usage and lighting conditions can also raise public awareness of environmental protection. The building's usage information is transmitted to the central control via the network, and the lighting controller can receive the message. As a result, the central control office can automate the management of lighting and HVAC systems based on time and space usage.
These networked lighting systems powered by smart sensors can save a lot of energy. Suppose there is an underground parking lot where the lights are fully illuminated 24 hours a day, and without detecting motion, these lights are automatically dimmed, saving more than 50% of energy. The system can also be integrated with nearby sensors to help detect parking spaces and inform the driver of the location that is suitable for parking, shortening the process of finding empty spaces, reducing gas consumption and carbon footprint.
Other major applications include street lights and outdoor parking lots. In both environments, the lighting is fully illuminated from dusk to early morning, with or without vehicles or pedestrians. The streetlights driven by the sensor can reduce the brightness by 50% after two in the morning, and the sensors are connected to each other. The range covered by the detection range is long. If the detection arrives at the vehicle, the street light will be automatically turned into full light. . Other environments, such as offices and high-rise buildings, are usually fully lit even if no one uses the lighting system. Therefore, it can be set to darken the lights in these places when "no motion is detected" or "after 8pm". shut down.
Adopt automatic energy saving strategy to improve commercial lighting efficiency
Commercial lighting focuses on efficiency while also requiring a new digital architecture to provide new features and reduce costs. Autonomous controls and sensors reduce maintenance costs and significant energy savings, saving ample resources to help replace obsolete traditional lighting systems. LED lighting has a lifetime of 30,000 to 50,000 hours, compared to 10,000 to 25,000 hours for fluorescent lamps and 5,000 to 11,000 hours for halogen/incandescent lamps. .
Fluorescent lamps have a slight flicker at the AC (AC) line frequency, and its spectrum is limited to present all colors, so some people don't like to use fluorescent lights. Although today's fluorescent lamps operate efficiently, they can become very expensive after adding components with adjustable low brightness. In addition, the stability system of the fluorescent lamp cannot shorten the time of opening/closing the loop, and the motion sensor or proximity The ProximityControl solution is not ideal.
When LED lighting is properly designed, it can achieve up to 30,000 to 50,000 hours of life, better spectrum, no flicker, and faster brightness adjustment.
An automatic energy-saving strategy in a commercial lighting environment that examines space usage and proximity detection, and detects when people in the room are leaving, control time, and ambient light sensing adaptation. The information obtained can be controlled in a variety of ways:
The lighting controller uses standard feedback loops and control mechanisms to reduce the lighting output of the fixture when it is not needed to avoid wasting energy. Works best with LED lighting.
Optional light conversion
In large rooms, fixed steps can be set, such as turning on the second or third source to enhance the illumination output or reduce the brightness.
Autonomous lighting control
Low-energy wireless networks, such as ZigBee, Wi-Fi, or wired networks such as DALI and DMX, can provide specialized lighting solutions for individual locations, and can also establish a central control system based on policies and requirements. Control lighting.
Improve energy management building connected lighting system
Designers of commercial luminaires and lighting systems are facing new challenges, and in addition to new government-defined specifications, customers are beginning to take an interest in high-performance green products. Building-connected lighting can be applied to HVAC energy management and lighting management, making total energy management within the enterprise easier. Building-connected lighting systems allow companies to control the overall temperature of each room and the energy required for lighting, and automatically review the space and time they have taken to improve overall energy management.