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Measurement and Verification

/Tag:Measurement and Verification

Small deviations from predicted energy consumption may hide big issues

When a baseline built over a certain period has R2=95%, it means that baseline formula accurately predicts actual consumption in 95% of cases within this period. This does NOT mean that there were no changes during this period. The wrongly predicted 5% of data points may be measurement noise or data collection error or [...]

Saving energy is like playing golf, somewhat

Calculating energy savings results is keeping like golf score.  If you ever been on the green, understanding the meaning of CUSUM is trivial. Baseline - how machine is supposed to work or worked before retrofit - is a par. CUSUM - a cumulative sum of deviations from baseline - is score. If CUSUM is above [...]

Will this energy efficiency measure work for you?

To M&V or not to M&V - this is the question If you are in charge of energy at your manufacturing or commercial facility, you are likely to be addressed by vendors with various energy efficiency improvements proposals. It can be a more efficient machine or a tune-up or an addition to your existing system. [...]

How to measure saved energy? Measurement and verification of energy efficiency projects

A proper answer to this seemingly simple question is nothing but simple. Proper measurement and verification of achieved savings is a key factor when calculating payback period, IRR for an investment into energy efficiency project and any other in-company ratio. Effectively, M&V may mean a difference between energy efficiency project being named [...]