Can Smart Thermostats Save Energy?

NEST thermostat reading 76 degrees installed on wall
“Smart” thermostats were installed in over 30 research homes.

Thermostats are the central switch that controls operation of heating and cooling systems—commonly the largest energy end use in homes. That energy setup/setback has potential for energy savings has been demonstrated repeatedly in well-controlled evaluations. Thus understanding how the occupants and thermostat interact is key to controlling energy use. Programmable thermostats have often been bypassed by occupants. Newer “smart” thermostats get around these problems by self-programming depending on heuristic or machine learning evaluation of user control habits as well as sensed occupancy. These modern devices use a combination of data on occupancy, weather, and thermostat-setting preference to help consumers with automated setback/setup schedules.

Researchers at FSEC installed smart thermostats, primarily the Nest Learning Thermostat, in more than 30 research homes. A full year of sub-metered hourly temperature and heating and cooling system operation data were available prior to the installation of the smart thermostat allowing detailed evaluation of temperature-related changes. Overall measured heating and cooling energy savings averaged 9.5% with some significant variation among homeowners.

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Evaluation of the Space Heating and Cooling Energy Savings of Smart Thermostats in a Hot-Humid Climate using Long-term Data*

 

*This paper was presented at the 2016 ACEEE Summer Study on Energy Efficiency in Buildings in Pacific Grove, CA on August 22 -26, 2016.

USDA Subsidized Energy Audits for Florida Ag Producers and Rural Small Businesses

By Janet McIlvaine
09/22/2016

The University of Central Florida’s FSEC conducts energy audits, renewable energy assessments, and technical assistance for the USDA Rural Energy for America Program (REAP) grant and loan program which is specifically for renewable energy systems and energy efficiency improvements. Any Florida agriculture operation or rural small business is eligible for FSEC support. The USDA subsidizes 75% of FSEC’s audit cost.

Two FSEC employees review solar access maps with business owner.
Solar access maps are produced and reviewed with business owners as part of FSEC’s technical assistance.

The audit includes an on-site visit to inventory energy use, utility bill analysis, evaluation of efficiency improvement options, projected annual energy savings, all summarized in a REAP-required Technical Report, and assistance with completing the technical portions of the application. Grants are eligible for up to 25% of eligible project costs and range from $2,500-$500,000 for renewable energy systems and $1,500-$250,000 for energy efficiency improvements.

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Join Us Online! Electric Vehicles: At the Intersection of Transportation and Energy

This month’s UCF Energy Connections Seminar, “Electric Vehicles: At the Intersection of Transportation and Energy,” is now being offered online.

On Wednesday, Sept. 20, 2016 at 11 a.m., please join the seminar from your computer, tablet or smartphone.
https://global.gotomeeting.com/join/570064253

You can also dial in using your phone. United States +1 (646) 749-3131
Access Code: 570-064-253

First GoToMeeting? Try a test session:  http://help.citrix.com/getready

UCF Energy Connections Seminar Series
Listen. Learn. Connect

 

UCF Energy Connections Seminar Series – September 2016

Electric Vehicles: At the Intersection of Transportation and Energy

Presented by: Dr. Paul Brooker

When: September 21, 2016 @ 11 a.m.
Location: FSEC, 1679 Clearlake Rd., Cocoa, FL 32922. Auditorium

Since the introduction of the automobile in the early 1900’s, there has traditionally been a separation between transportation energy and residential/commercial/industrial energy. With electric vehicles on the rise, however, energy will need to flow freely between vehicles and the grid.

UCF Energy Connections Seminar Series
Listen. Learn. Connect

As we move towards this intersection, we will begin to encounter conflicts between the needs of the vehicle owner and the desires of the grid/building energy operator. For example, the electric vehicle owner is concerned about getting home every day, and ensuring that the battery’s lifetime is not adversely impacted. The grid operator is concerned with maintaining high power quality and reducing the risk of outages as renewable energy sources are increasingly added to the mix. Understanding distinctive needs of each user will lead to better management of energy flows that can benefit transportation, the grid, and society as a whole. This presentation will explore how the needs of the vehicle may be met, while also providing added value to the grid.

Dr. Paul Brooker Biographical Sketch

Dr. Brooker received his B.S. in Chemical Engineering from Brigham Young University in 2004 and his Ph.D. from the University of Connecticut in 2009. After graduating, Dr. Brooker came to UCF’s FSEC, where he has participated in research ranging from fuel cells to electric vehicles to solar photovoltaics.

Within the DOE-sponsored Fuel Cell High Temperature Membrane Working Group at FSEC, Dr. Brooker’s role was to apply electrodes onto novel membranes, and to investigate the performance in an operating fuel cell environment. In addition, Dr. Brooker investigated the use of heteropolyacids (HPAs) for reducing membrane degradation during accelerated stress testing. As part of the Electric Vehicle Transportation Center (EVTC), Dr. Brooker has modeled the use of fuel cells in electric vehicles, as well as electric vehicle infrastructure needs. His research is investigating the potential for fuel cell vehicles to contribute to energy needs beyond transportation, such as grid ancillary services, back-up power, and distributed energy resource management. Dr. Brooker is a project leader within the Photovoltaic Manufacturing Consortium, where he is directing research on diamond wire slicing of silicon ingots. This research is investigating methods to understand diamond wire wear and its effect on the surface of the cut wafer. This understanding could lead to improved control of wafer surfaces, reduced consumption of diamond wire, and increased wafer throughput, all by optimizing the slicing parameters.