We, in the energy industry, have long used engineering calculations, aided by simple linear regression models, to estimate the energy saving potential of proposed interventions. However, as data sensors become increasingly ubiquitous and data storage costs continue to decline year over year, a shift away...
SkySpark collects and stores data from any number of sources and provides an open analytics platform that can be programmed to automatically make sense of the data and provide insights on a building or a portfolio of buildings. This open platform can be customized to a...
You created a regression model of your building’s energy use and now want to use its predictive capabilities. How do you go about assessing your model’s predictive power? As I mentioned in an earlier post, you want to steer away from focusing on a singular...
Trust, but verify. Seems reasonable, but sometimes in commissioning I think ‘always verify’ is a better phrase. Investigation is key in retro-commissioning We were completing a retro-commissioning project on community college building in Southern California and noticed something off in the trend data. The economizer on two...
A big focus for maintenance staff is minimizing complaints to relieve occupant discomfort. People who are consistently too hot or too cold make it known and we’ve seen many buildings where the entire building operation was off kilter due to the needs of a few,...
We use regression analysis frequently in our energy engineering analysis, but results can be less than ideal for many cases. Now with big data and the current technology of faster computing, we can use a comprehensive understanding of statistics, hypothesis testing, and principles of inference...
A conversation between Jim Kelsey, President of kW Engineering and Jonathan Schoenfeld, Director of Energy and Analytics at Kodaro. Jim: At kW we’ve been cautious about jumping on the “analytics” train. Not because it’s not promising, but really because there have been so many options, so...
I’ve found that one of the most effective tools in visualizing energy use is the heat map. I also find them beautiful. Call me an energy geek but visualizing energy use on a calendar is very effective for spotting scheduling energy savings and peak demand...
I spend a lot of time with building engineers deciphering what’s happening in their VAV systems. Unfortunately, it’s often not what the design engineer intended, or what the controls company envisioned when they set up the system. When identifying problems with building control systems, it’s...