Calculating energy savings
2010 R&D 100 Winner
Residential buildings consume 22% of all the energy used in the United States. Homeowners looking to save energy—and money—now have a custom tool to develop a comprehensive energy plan. Researchers at Lawrence Berkeley National Laboratory, Berkeley, Calif., developed a free Web tool, Home Energy Saver (HES), licensed by Microsoft Corporation, Redmond, Wash., as Hohm, built on a building energy simulation program. Users can generate efficiency recommendations by answering 15 questions or obtain more detailed results by entering details about construction materials, appliances, rated efficiencies and hours of use, occupancy levels, and more. Estimates and suggested improvements are made for heating, cooling, water heating, major appliances, lighting, and miscellaneous equipment.
HES uses DOE-2, an energy analysis and thermal load simulation program, to calculate heating equipment and thermal distribution efficiencies, infiltration, and thermostat management. Actual electricity tariffs provide more accurate use calculations.
About one-third of HES users made energy-efficient improvements to their homes based on recommendations from the Web site.
Home energy use calculator
|Troy Batterberry, Microsoft Corp.|
|Rich Brown, Lawrence Berkeley National Laboratory|
|Evan Mills, Lawrence Berkeley National Laboratory|
The Home Energy Saver/Hohm Development Team:
Troy Batterberry, Microsoft Corp.
From Lawrence Berkeley National Laboratory:
Mai Sue Chang