Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

The heat is on: NIST zeroes in on energy consumption of ice makers

15.04.2011
In tests of four different types of new refrigerators, National Institute of Standards and Technology (NIST) researchers found that ice makers increased rated energy consumption by 12 to 20 percent. About three-fourths of that additional energy cost is due to the electric heaters used to release the ice bits from the molds.

With only one-fourth of the extra energy actually used to cool and freeze water, "there are substantial opportunities for efficiency improvements merely by optimizing the operations of the heaters associated with the ice makers" or by introducing a more efficient alternative technology, report NIST mechanical engineer David Yashar and guest researcher Ki-Jung Park.*

Since refrigerators account for 8 percent of the total energy consumed by 111 million U.S. households according to the Department of Energy (DOE), the potential savings are significant.

Currently, ice maker energy consumption is not reflected in federal minimum efficiency standards for refrigerators or in the voluntary Energy Star program, which requires energy usage to be significantly lower than the regulatory limit.

DOE, which helped to fund the NIST study, has announced that it will increase the minimum efficiency standard by 25 percent over the current level, starting in 2014. DOE also intends to incorporate the energy used by ice makers into their regulatory test. Because no widely accepted test for ice makers was available when they announced these intentions, DOE plans to add 84 kilowatt hours to the energy efficiency rating of every refrigerator equipped with an ice maker, Yashar explains.

Once a reliable, straightforward test is available, he adds, DOE will eliminate the "placeholder" energy consumption and use actual ice maker test results in efficiency ratings.

To speed progress along this path, Yashar and Park evaluated several different approaches to measure the energy consumption of ice makers. Their goal was to identify a method that consistently yielded accurate results but did not add substantially to the complexity of appliance energy consumption tests under current regulations.

Yashar and Park examined four refrigerators, which sampled a variety of ice maker technologies. Their study used a uniform test setup, consistent with current regulatory procedures, and measured the energy consumption of the four units while their ice makers were actively producing ice and, again, while the ice makers were not operational.

The results point the way to a standard test methodology that appears promising for several different ice maker technologies and configurations. Next steps include sharing their approach with other laboratories, which also will test ice makers and compare results for similar units. Also, Yashar says he intends to evaluate the measurement techniques on other styles of automatic ice makers.

*D.A. Yashar and K.J. Park, Energy Consumption of Automatic Ice Makers Installed in Domestic Refrigerators. NIST Technical Note 1697, April 2011.

Mark Bello | EurekAlert!
Further information:
http://www.nist.gov

Further reports about: NIST energy consumption energy consumption of ice makers

More articles from Power and Electrical Engineering:

nachricht Fraunhofer ISE Supports Market Development of Solar Thermal Power Plants in the MENA Region
21.02.2018 | Fraunhofer-Institut für Solare Energiesysteme ISE

nachricht New tech for commercial Lithium-ion batteries finds they can be charged 5 times fast
20.02.2018 | University of Warwick

All articles from Power and Electrical Engineering >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Developing reliable quantum computers

International research team makes important step on the path to solving certification problems

Quantum computers may one day solve algorithmic problems which even the biggest supercomputers today can’t manage. But how do you test a quantum computer to...

Im Focus: In best circles: First integrated circuit from self-assembled polymer

For the first time, a team of researchers at the Max-Planck Institute (MPI) for Polymer Research in Mainz, Germany, has succeeded in making an integrated circuit (IC) from just a monolayer of a semiconducting polymer via a bottom-up, self-assembly approach.

In the self-assembly process, the semiconducting polymer arranges itself into an ordered monolayer in a transistor. The transistors are binary switches used...

Im Focus: Demonstration of a single molecule piezoelectric effect

Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale

Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...

Im Focus: Hybrid optics bring color imaging using ultrathin metalenses into focus

For photographers and scientists, lenses are lifesavers. They reflect and refract light, making possible the imaging systems that drive discovery through the microscope and preserve history through cameras.

But today's glass-based lenses are bulky and resist miniaturization. Next-generation technologies, such as ultrathin cameras or tiny microscopes, require...

Im Focus: Stem cell divisions in the adult brain seen for the first time

Scientists from the University of Zurich have succeeded for the first time in tracking individual stem cells and their neuronal progeny over months within the intact adult brain. This study sheds light on how new neurons are produced throughout life.

The generation of new nerve cells was once thought to taper off at the end of embryonic development. However, recent research has shown that the adult brain...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

2nd International Conference on High Temperature Shape Memory Alloys (HTSMAs)

15.02.2018 | Event News

Aachen DC Grid Summit 2018

13.02.2018 | Event News

How Global Climate Policy Can Learn from the Energy Transition

12.02.2018 | Event News

 
Latest News

Stiffness matters

22.02.2018 | Life Sciences

Magnetic field traces gas and dust swirling around supermassive black hole

22.02.2018 | Physics and Astronomy

First evidence of surprising ocean warming around Galápagos corals

22.02.2018 | Earth Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>