Reducing Energy Use and (Using) Operational Technology
Building Managers – I know everyday you are faced with having to provide quick answers to complex maintenance issues. A free publication I am Your Optimisation Guide – by NSW Department of Planning, Industry and Environment is written for you!
This practical handbook is designed to raise awareness to factors that impact on energy use in complex HVAC systems. It lists 20 opportunities your organisation can action in co-operation with your service technician in the building management system (BMS). The opportunities are mostly related to control system optimisation and provide immediate reduction in energy related emissions.
Active searching for opportunities and quick-wins is the best way to achieve continuous improvement. Some of our favourite interventions are the following:
Turn Off Equipment When Not Needed
Due to poor sequences, poor optimum start/stop control, undersized systems, or general disregard for energy, equipment scheduling is set to 24/7.
Tune Up of VAV terminal units
A tune up not only saves energy but reduces the cold/hot complaints and improves ventilation for occupants. Common issues found include:
- Temperature sensors measuring incorrectly, setpoints and scheduling incorrect
- Inoperative damper actuators
- Defective controllers
- Incorrect static pressure setpoints for fan control
- Deficient air balance
- Reheat control valves stuck in position, leaking by or driving backwards
Measure Electricity and Natural Gas on BMS
Monitor in real time HVAC energy use on the BMS human-computer interface. In commercial office buildings HVAC electrical energy consumption can be around 40% of total building consumption or 70% of base building. Globally buildings are reponsible for about 37% of energy related emissions in 2019.
Track progress of your interventions and empower your service technician.
Timelines for reducing energy related emissions are accelerating with a goal of net zero by 2025 in new buildings. Reducing energy use is the first step to achieving net zero.