Disaggregating hot water use and predicting hot water waste in five test homes / Hugh Henderson and Jeremy Wade.

Format:

Book

Government document

Author/Creator:

Henderson, Hugh, author.

Wade, Jeremy, author.

Contributor:

United States. Department of Energy. Building Technologies Office, issuing body.

National Renewable Energy Laboratory (U.S.), sponsoring body.

Building America (Program : U.S.), sponsoring body.

Language:

English

Subjects (All):

Hot water--Monitoring--New York (State).

Hot water.

Water--Waste--Forecasting.

Water.

Water--Waste--Monitoring.

Water heaters--Monitoring.

Water heaters.

New York (State).

Genre:

Online resources.

Physical Description:

1 online resource (xi, 91 pages) : color illustrations

Place of Publication:

[Washington, D.C.] : U.S. Department of Energy, Energy Efficiency & Renewable Energy, Building Technologies Office, April 2014.

Summary:

While it is important to make the equipment (or 'plant') in a residential hot water system more efficient, the hot water distribution system also affects overall system performance and energy use. Energy wasted in heating water that is not used is estimated to be on the order of 10 to 30 percent of total domestic hot water (DHW) energy use. This field monitoring project installed temperature sensors on the distribution piping (on trunks and near fixtures) and programmed a data logger to collect data at 5 second intervals whenever there was a hot water draw. This data was used to assign hot water draws to specific end uses in the home as well as to determine the portion of each hot water that was deemed useful (i.e., above a temperature threshold at the fixture). Five houses near Syracuse NY were monitored. Overall, the procedures to assign water draws to each end use were able to successfully assign about 50% of the water draws, but these assigned draws accounted for about 95% of the total hot water use in each home. The amount of hot water deemed as useful ranged from low of 75% at one house to a high of 91% in another. At three of the houses, new water heaters and distribution improvements were implemented during the monitoring period and the impact of these improvements on hot water use and delivery efficiency were evaluated.

Notes:

Online resource; title from PDF title page (ENERGY, viewed February 9, 2017).

"April 2014."

"DOE/GO-102014-4397"--Page 63

Includes bibliographical references (pages 65-67).

"Prepared for the National Renewable Energy Laboratory on behalf of the U.S. Department of Energy's Building America Program, Office of Energy Efficiency and Renewable Energy."

OCLC:

972092386