Wilson “Snowflake” Bentley was born in my home town of Jericho, VT in 1865. The town is situated in Vermont in a unique way that allows for a lot of annual snow (by Vermont standards). Not only does Jericho get a lot of snow, but we also seem to be situated in such a way that we get perfect snowflakes that don’t clump together. This is what allowed Mr. Bentley to become one of the first known snowflake photographers. He invented his own way of catching flakes using black velvet so they wouldn’t melt or evaporate before he could snap a picture of them.
Optimal start/stop (OSS) is available as an out-of-the-box function in almost every HVAC building automation system sold on the commercial market today. Folks toss the term around with a very loose understanding of what it means. PID controls suffer the same dilemma. When you ask any industry professional to define OSS, you’ll get this generic and common response (Figure 1):
The floor was packed with a bustling crowd, filled with people from every branch of the Heating Ventilating and Air Conditioning (HVAC) industry. They were making contacts, meeting friends, and checking out the latest and greatest technologies. There were young professionals eager to experience what the industry has to offer. They were seeing the current state of the art but also thinking about the future as they pass vendors strutting their stuff. Everywhere you looked, there were folks dressed smartly, representing their products with a smile and a handshake. Everyone was boasting about their latest tech, itching to perform the ritual tchotchke handoff in the hopes that someone will remember their product and give them a call after the dust settles. All of this was housed at a convention center so large it has its own bus port and ceilings so high they make your local Walmart superstore look like a tent at a county fair.
I attended six talks, a few open panel discussions, an ASHRAE GPC36 Committee meeting, and topped the days off by making new friends and “nerding out” over HVAC. I chose to attend panels and presentations that had to do with controls, integration, and grid management because that’s where I believe we can easily continue to chip away at excessive energy consumption due to poorly controlled building HVAC systems.
Wilson “Snowflake” Bentley was born in my home town of Jericho VT in 1865. My town is situated in Vermont in a unique way that allows for a lot of annual snow (by Vermont standards). Not only does Jericho get a lot of snow, but we also seem to be situated in such a way that we get perfect snowflakes that don’t clump together. This is what allowed Mr. Bentley to become one of the first known photographers of snowflakes. He invented his own way of catching flakes using black velvet, so they wouldn’t melt or evaporate before he could get a picture of them.
Back in 2015 I wrote a blog post about ASHRAE Guideline 36 - High Performance Sequences of Operation for HVAC Systems. I referenced a spec my team at Cx Associates wrote for a BAS controls upgrade. Now in 2017, that spec, and the sequences contained therein, have been made into a fully functional BAS controlling 14 air handlers (AHUs), over 90 variable air volume boxes, and the central plant that serves them. Our firm artfully adapted the sequences to meet the needs of the building owner and the function of the building (healthcare) without sacrificing the high degree of complexity which yields the energy savings building automation systems have been promising for decades. After working on this project from specs to implementation, I can confidently say that Guideline 36 can deliver a reduction in energy consumption and improved comfort. The cost (excluding the norms of engineering labor, BAS reprogramming, and commissioning) is primarily paid through raising all ships. Let me explain.
Commissioning agents do a large amount of review of other people’s work and products. The building commissioning (Cx) process is a quality-assurance process for verifying and documenting that the performance of facilities, systems, and assemblies meet defined objective criteria. Therefore, to verify facilities and systems, I need access to a product’s technical documentation. In the commercial building space, almost all documentation is online and readily available via a quick Google search. Notice that I said almost.
Topics: Building Cx & Design Review
Lighting control systems are making their way into new construction and are becoming as common place as HVAC controls. Just like with many new building technologies, lighting control systems started small, and are now gaining more and more market penetration. This is great news for those of us who work towards saving energy for building owners. This new frontier of controls creates new challenges for those of us who work towards saving energy for building owners. Why, you ask?
Topics: Building Cx & Design Review
I recently finished Neal Stephenson’s Cryptonomicon. I highly recommend this story which is a 1999 novel about 90s era computer hackers, World War II, and encryption. It is both technically accurate, and gives a pretty good description for the 90s era hacker culture. The book also gives the reader a good intro to encryption concepts. However, why I am discussing it here is because one of the main characters, Bobby Shaftoe, brought to my attention the concept of people and their ability to adapt. A person’s adaptability is important in my opinion - in life - but also in energy efficiency.
Topics: Energy Efficiency