ASHRAE has released a new standard that provides a test method to determine the heat gain generated by office equipment.
The growing use of plug loads coupled with insufficient data on how much energy they generate present a challenge to engineers in determining how to best cool a building.
ASHRAE/ANSI Standard 203-2014, Method of Test for Determining Heat Gain of Office Equipment Used in Buildings, prescribes methods of test to determine the range and average operating heat gains of electrical equipment for use in cooling load calculations.
The standard applies to plug-load type electrical equipment. Plug loads (computers, monitors, printers, projectors, etc.) use between 20% to 50% of a building’s energy.
Increased use of computers and advances in building techniques and building envelopes have made heat gain from electrical equipment a larger factor in engineering cooling systems.
“Most plug loads operate at a fraction of their nameplate electrical load, so, as a result, produce significantly less heat load than engineers may use in their cooling load calculations based on those nameplate values,” according to an ASHRAE statement. “This can result in over-sizing of air-conditioning equipment, resulting in extra initial cost for that equipment as well as higher operating cost.”
Related Stories
| Aug 11, 2010
BIG's 'folded façade' design takes first-prize in competition for China energy company headquarters
Copenhagen-based architect BIG, in collaboration with ARUP and Transsolar, was awarded first-prize in an international competition to design Shenzhen International Energy Mansion, the regional headquarters for the Shenzhen Energy Company.
| Aug 11, 2010
Jacobs, Arup, AECOM top BD+C's ranking of the nation's 75 largest international design firms
A ranking of the Top 75 International Design Firms based on Building Design+Construction's 2009 Giants 300 survey. For more Giants 300 rankings, visit http://www.BDCnetwork.com/Giants
| Aug 11, 2010
New air-conditioning design standard allows for increased air speed to cool building interiors
Building occupants, who may soon feel cooler from increased air movement, can thank a committee of building science specialists. The committee in charge of ANSI/ASHRAE Standard 55 - Thermal Environmental Conditions for Human Occupancy—after months of study and discussion--has voted recently to allow increased air speed as an option for cooling building interiors. In lay terms, increased air speed is the equivalent of turning up the fan.
| Aug 11, 2010
Architecture Billings Index flat in May, according to AIA
After a slight decline in April, the Architecture Billings Index was up a tenth of a point to 42.9 in May. As a leading economic indicator of construction activity, the ABI reflects the approximate nine to twelve month lag time between architecture billings and construction spending. Any score above 50 indicates an increase in billings.
| Aug 11, 2010
Free-span solar energy system installed at REM Eyewear headquarters
The first cable-suspended free-span solar energy system was completed today over the REM Eyewear headquarters parking lot in Sun Valley, Calif. The patented, cable-supported photovoltaic system created by P4P Energy is expected to generate 40,877 kilowatt-hours of renewable electricity per year, enough to power five to six single family homes and to prevent 1.5 million pounds of carbon from being released into the atmosphere.
| Aug 11, 2010
Construction employment declined in 333 of 352 metro areas in June
Construction employment declined in all but 19 communities nationwide this June as compared to June-2008, according to a new analysis of metropolitan-area employment data released today by the Associated General Contractors of America. The analysis shows that few places in America have been spared the widespread downturn in construction employment over the past year.
| Aug 11, 2010
Jacobs, Hensel Phelps among the nation's 50 largest design-build contractors
A ranking of the Top 50 Design-Build Contractors based on Building Design+Construction's 2009 Giants 300 survey. For more Giants 300 rankings, visit http://www.BDCnetwork.com/Giants
| Aug 11, 2010
Arup, SOM top BD+C's ranking of the country's largest mixed-use design firms
A ranking of the Top 75 Mixed-Use Design Firms based on Building Design+Construction's 2009 Giants 300 survey. For more Giants 300 rankings, visit http://www.BDCnetwork.com/Giants
| Aug 11, 2010
10% of world's skyscraper construction on hold
Emporis, the largest provider of global building data worldwide, reported that 8.7% of all skyscrapers listed as "under construction" in its database had been put on hold. Most of these projects have been halted in the second half of 2008. According to Emporis statistics, the United States had been hit the worst: at the beginning of 2008, "Met 3" in Miami was the only U.S. skyscraper listed as being "on hold". In the second half of the year, 19 projects followed suit.