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Home » Topics » HVAC Engineering Technology » Cooling & Chillers

Cooling & Chillers
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Grounded In Reality

Grounded In Reality: Better Ground Source Heat Pump Design

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.
Steve Kavanaugh, Ph.D. Lisa Meline, P.E.
December 1, 2016

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.


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Why Would A Hospital Consider Absorption Chillers?

Why Would A Hospital Consider Absorption Chillers?

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.
Marcia Karr, P.E.
November 8, 2016

Atypical load profile for a hospital might show heat energy increases in the winter, with electric demand peaks in the summer as seen in Figures 1 and 2.


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Chiller Plant Optimization: Improving On Variable Pri-mary Flow Chilled Water System Operation

Chiller Plant Optimization: Improving On Variable Primary Flow Chilled Water System Operation

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.
Mark Bandini, P.E., CAP Ernie Brandusa, P.E. Carlos Petty, P.E.
November 2, 2016

Optimizing any cooling plant for minimal energy consumption is a demanding science.


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Case In Point
CASE IN POINT

Chilled beams, DOAS upgrade KY school's aging HVAC

October 14, 2016

Clark County Public Schools in Kentucky has gained notoriety for its sustainable school designs.


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Case In Point
CASE IN POINT

Ice bank storage melts away L.A. resort's utility costs

October 13, 2016

As a luxury resort, comfort is a top priority for Pacific Palms Resort. However, the resort, situated on the outskirts of Los Angeles, was in need of an energy-efficient and sustainable HVAC solution.


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Back 2 Basics image

Commercial Building Chiller Retrofit Using Integrated Project Delivery

Howard McKew, P.E., C.P.E.
October 10, 2016

This month’s B2B will focus on an 80,000-sq-ft existing commercial office building in need of replacing its two air-cooled chillers.


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Martin King
Guest Column

Is Replacing Your HVACR System Feasible?

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.
Martin King
October 5, 2016

According to the ASHRAE systems handbook, HVACR machines will last 15 to 18 years, provided that a median level of preventive care is performed throughout its life cycle.


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Chiller Plant Optimization: The Role Of Controls

Chiller Plant Optimization: The Role Of Controls

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.
Carlos Petty, P.E.
October 3, 2016

Properly selected automated controls to minimize chiller plant energy, power consumption, and the cost of operations are essential for overarching chiller plant performance. 


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Case In Point
CASE IN POINT

VRF helps Texas courthouse return to historic roots

September 12, 2016

In 1896, the citizens of Bexar County, TX, built a courthouse in the heart of San Antonio.


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Getting Comfortable With Radiant HVAC

Getting Comfortable With Radiant HVAC

The particular charms of panels, chilled beams, and related options seem to be at-tracting more attention from designers and owners these days. Design, installation, and even architectural considerations can earn a hard look at radiant for a surpris-ing number of applications.
Steven G. Liescheidt
Steven G Liescheidt P.E., CCS,
September 3, 2016

Radiant HVAC — what is it? Heating is done in three ways in buildings — convection, conduction, and radiation. Heating and cooling with air is common in most building HVAC systems.


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