In the first of a pair of articles on motor fundamentals for HVACR, the author gets into everything from industry standards and service conditions to changing speeds, enclosures, and the often misunderstood service factor. You’ll want to save this one for your team’s reference library.
In this section of our post-AHR/ASHRAE coverage, your intrepid editor traverses the carpeted hallways of Las Vegas, taking copious notes at gatherings to discuss two specific standards past, present, and possibly future.
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.
Warm discharge plumes sweeping back into air-cooled condensers is nobody’s idea of an ideal performance environment. This CFD study shows how wind speed, wind direction, spacing between chillers, and separation from adjacent buildings all factor into the conversation about the best defense against unwanted hot air.
Trends don’t always follow the expected path (or timeline), but the basics remain the basics and increased cabinet density remains inevitable. Let’s revisit the progress of liquid in data center strategy and the tenets of a future-proof(ish) hybrid design for today.
Revitalizing turn-of-the-century infrastructure means finding a way to dehumidify interiors successfully. Before you move on to weighing DOAS and other techniques, understand the built-in relationship between these structures and water.
Cooking over a wood flame is hardly a novel concept, but as a popular trend in restaurants, it causes headaches and occasionally much worse from a life safety perspective. Survey a range of incidents and get reminded why creosote is a key enemy in this environment. Then finish with a look at what manufacturers, designers, and owners are (or should be) doing to win a new duel with an old fuel.
Well, that’s not really the whole story. “Lifecycle costs” could even include having to buy the same equipment all over again because it’s been ruined. It’s also about how adequate maintenance can steer a facility clear of avoidable and sometimes terrible boiler accidents that happen each year.