Thanks to a recent remodeling, patrons seated indoors experience the ambience of dining outdoors at O’Toole’s Irish American Grill & Bar. However, there are no mosquitoes, flies, or vehicle emission odors, and the temperature is always a comfortable 74°F.
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.
While CHP is good, CCHP can be even better for your facility and its locale. The author surveys the potential benefits, building code input, and electrical considerations. After a couple of case studies, she then reviews considerable engineering re-sources the DOE provides for those contemplating a forward-looking but proven design.
The larger or more complex a cooling plant becomes, the more challenges to its ef-ficiency it will face. When applied wisely, modern controls and equipment can rise to meet those challenges. Read up on active balancing, pump dynamic differential setpoint control, and more responsive tactics for when the worst thing you can do is just go with the flow.
Consider these factors when sizing up a potential upgrade. In addition, pick up a few easy tips for maintenance in the meantime. You can’t necessarily buy time, but you can get in front of a worst-case breakdown scenario.
Sometimes it does pay to sweat the small stuff. Data availability might vary depending simply on where you’re accessing it. Not only selection but placement of your sensors and transmitters can influence their effectiveness and response time. Bearing down on such details on the BMS side can yield long-term results for your cooling goals.
Many engineers tend to avoid or delegate the nitty gritty of a ground source heat pump system, from soil moisture effects to building system (im) balance. It's time for designers to get in the loop. Learn more about Grounded In Reality in the December issue. Other topics in the December issue include health care HVAC, Boilders, check out the Back2Basics, and more.