When the school year kicks off each year in late summer, it’s not unusual for temperatures in many parts of the country to soar into the 90s, which can make it difficult for students to concentrate and be productive.
This month’s Facility File will focus on the B2B April test for an HVAC application within a high school facility, with the existing field house HVAC system being retrofitted to serve as an emergency shelter building with its associated locker rooms and toilet facilities.
The town of Portsmouth, RI, had four schools (two elementary schools, one middle school, and one high school) with outdated, inefficient gas-fired hot water boilers that were becoming expensive to maintain and operate.
A Tennessee district faced an old school HVAC challenge: aging ventilators and space constraints. So this team tried a new-school variation on common VRF retrofits to deliver improved efficiency and critical IAQ: they decentralized the outdoor air, combining enthalpy wheel and VRF components within a single classroom enclosure.
Why do ground loops in moist soils sometimes perform better than expected? What ground loop design tactics can address building system imbalance? Engineers need to take more responsibility for their full GSHP designs, and these questions are a good place to start.
With a little guidance on ground-source heat pump design temperatures and a few rules of thumb for ground loop flow rates, most engineers are pretty comfortable designing the building side of a ground-source heat pump (GSHP) system.
Retrieving every last bit of performance from the system while stopping short of the surge line is no small feat. Dig into sizing, tower selection, chilled water loads and stability, and condenser water management to leave no efficiency stone unturned. Read more in April issue