All hydronic systems designed around renewable energy heat sources — as well as those designed around conventional boilers — have at least one controller that measures and responds to temperature. Common examples are temperature setpoint controllers, outdoor reset controllers, mixing controllers and differential temperature controllers. Complex systems that operate in multiple modes, or use multiple heat sources, often have several temperature-based controllers.
The 7th Emerging Water Technology Symposium (EWTS) was held in San Antonio the second week of May. The Symposium is sponsored by the leading plumbing groups: IAPMO, ASPE, PMI, World Plumbing Council, and the Alliance for Water Efficiency. This two day Symposium always has some interesting presentations.
It’s been more than two years since I took over PM Engineer from my predecessor. What a wild and crazy time that was — the COVID-19 pandemic was just getting started and lockdowns were being mandated. Needless to say, I didn’t get out much that year, or even last year, for that matter.
Let us get down in the dirt, or at least “backfill.” A recent discussion on ASPE Connect’s “Open Forum” was entitled “Minimum Pipe Cover when Calculating Invert Under Building Slab for PVC Sanitary.”
“It couldn’t happen where I live.” Many in the United States probably thought that when watching the horror occurring in Flint, Michigan, from 2014 to 2016.
Some of us may remember a day when ketchup was placed in thick glass bottles with skinny necks. I’d like to meet the person who came up with that idea and kindly ask, “What were you thinking?”
As global energy planning moves away from fossil fuels and toward electricity, an increasing number of hydronic heating systems are being supplied by heat pumps. Some use water-to-water heat pumps supplied by geothermal earth loops. Others use air-to-water heat pumps.