Technical

An Energy Modeling Analysis of Warehouse Heating Systems

Space heating and lighting consume most of the energy in non-refrigerated warehouses. Installing more efficient lighting to save energy has been well documented by computer modeling. But what about space heating? This article summarizes an energy modeling analysis showing energy performance for six types of gas-fired heating systems commonly used in warehouses.
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Eliminate Voltage Unbalance

Voltage unbalance degrades performance and shortens the life of a three-phase motor. It causes phase current unbalance far out of proportion to the voltage unbalance. Unbalanced currents lead to torque pulsations, increased vibrations and mechanical stresses, increased losses, and motor overheating, which results in a shorter winding insulation life.
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Investigating Residential Humidity Complaints

Scenario: Single stage residential cooling equipment. Homeowner complains that humidity is too high at their desired thermostat setting. Actions: You think this is too easy. Probably a system-related problem (dirty filter, low charge, dirty condenser; the usual stuff). But you also realize that it’s been a little cooler than most summers.
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Optimizing Dedicated Outdoor Air Systems

Outdoor air brought into a building can be expensive to temper and, if not properly conditioned, can cause humidity problems for the building. Designers are increasingly finding that using dedicated outdoor air systems (DOAS) allows them to comply with ASHRAE 62.1 with an energy efficient and easily verifiable design.
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Combined Heat and Power: A Clean, Local Energy Solution

The U.S. Department of Energy’s (DOE’s) Industrial Technologies Program (ITP) has identified combined heat and power (CHP) as one of the most important opportunities available today for increasing energy efficiency and reducing emissions. This article explains CHP technology uses and benefits.
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Focused Cooling Using Cold Aisle Containment

As heat densities and cooling costs rise, data center professionals are looking for more efficient cooling solutions. A cold aisle containment retrofit can be implemented easily and quickly, carries a payback time from weeks to a few months, and can reduce cooling related energy costs by as much as 30 percent.
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Optimizing Fleet Maintenance With Wireless Vehicle Management

Unfortunately, many fleets simply take a reactive approach to vehicle maintenance. In a widely distributed fleet, that could mean costly repairs, not to mention vehicle downtime. Fleet managers need to be able to monitor and collect data on the “health” of their vehicles to fix problems early and reduce costs.
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2015 ACCA Conference

Images from the 2015 ACCA Conference in Grapevine, Texas. Posted on April 8, 2015.

Podcasts

NEWSMakers: Mark Crockett
Mark Crockett vice president, Crockett Facilities Services, explains the importance of technician training, the value of being a top minority-owned company in the U.S., current projects the company is managing, and much more. Posted on April 24.
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2015 National Plumbing & HVAC Estimator

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