There is a school of thought, in the race for low carbon, lower energy consumption, etc. that installing a new BMS (building management system) will magically solve all your energy problems. A quick review of the above chart gives the hard evidence, it failed, and it is difficult to believe that more building owners don’t demand evidence from vendors, after installation, to support those glossy brochures.
In my experience, vendors sell sell sell, install, and move on to the next project, but where is the Measurement and Verification (M&V)? What is M&V? It is the name given to process, that will essentially prove or disprove that those promised energy savings were achieved.
Generally, little post installation checking is conducted to try and validate the promised savings were achieved, whereas in reality the results are poor. In the above example, the peak month energy consumption actually increased by approx. HKD 90,000, hardly the savings often touted in the brochures.
Fortunately, whilst conducting energy audits I have access to the raw data, and plot charts like the above, and find a new BMS alone not the best choice for energy management.
Whether you choose a BMS, variable speed drives, or other means, you should pay the extra to monitor and report the results – trust but verify! Properly commissioned installations can help monitor operating costs, but that is not the answer to improving energy efficiency.