When it comes to building automation, the use of wireless sensor networks (WSNs) and Internet of Things (IoT) in buildings is becoming more common. The use of wireless sensor networks adds "smart" elements to existing building infrastructure without the need to worry about additional wiring and installation in hard-to-reach areas.
Looking at more and more sensors entering the wireless system, I often ask myself, “What are the purpose and reasons for installing sensors in HVAC, lighting or building security systems?â€
Four important trends can help answer this question:
energy efficiency
Safety and reliability
User comfort
Preventive maintenance
The first part of this blog will revisit energy efficiency, which is an important trend in the installation of sensors in building automation systems.
Whether you are a landlord, homeowner or tenant, we care about energy and cost control issues. Today's buildings use a lot of grid energy – and then waste 30% of grid energy1. By creating an intelligent building that uses sensor nodes, you can run the building's high-power devices only when necessary, saving energy, reducing waste, and most importantly, controlling costs for us.
Figure 1 shows a set of commercial building energy statistics.
Figure 1. Energy consumption statistics for commercial buildings
In HVAC systems, intelligent monitoring and control can be achieved by the addition of separate environmental sensors that measure accurate temperature and humidity readings for each area or room throughout the building. For example, I usually only use one room in the evening. But within six to eight hours, I will still consider the insulation and insulation of each room. Unlike central temperature monitoring devices, the addition of multiple sensors throughout the building gives you more options to control insulation and insulation in different areas based on usage or time of day.
Large commercial buildings can use a personnel counting system for Demand Control Ventilation (DCV). DCV can add fresh air based on the number of people occupying a certain room, instead of opening the HVAC system based on preset controls regardless of the number of existing residents.
Only HVAC and lighting systems account for 59% of the energy use of commercial buildings. The use of intelligent monitoring and control solutions can greatly impact the energy use of these applications. By implementing connected sensors for advanced lighting control (low power occupancy detectors and energy harvesting daylight sensors) and adding connected sensors for advanced HVAC control (low power environmental sensors and personnel counting systems), we can really start calculating the whole Energy consumption. I hope this infographic will motivate you to think about the connectivity of HVAC and lighting systems. For jump start connectivity sensing, be sure to verify the following building automation TI design and other resources.
Other resources
Download infographic: Statistics on energy consumption for commercial buildings.
Examine these WSN TI design reference designs:
Environmental sensor nodes: humidity and temperature sensor nodes in star networks below 1 GHz for button battery life of more than 10 years
Ambient Light Sensor Node: Interrupt-based ambient light and environmental sensor node reference design for sub-1 GHz networks.
Read Evan Cornell's blog post, "Ultra-long battery life in wireless sensor nodes."
Read Jarrod Kreb's blog post, "How to use automation technology to integrate the Internet of Things into old buildings."
Original link: https://e2e.TI.com/blogs_/b/industrial_strength/archive/2016/02/17/trends-in-building-automaTIon-energy-efficiency
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