Case Studies

Showing results 1 - 50 of 79

Author(s)
Hoeschele,
Weitzel,
Backman
Organization(s)
ARBI
Publication Date
Description
This project completed a modeling evaluation of a hybrid gas water heater that combines a reduced capacity tankless unit with a downsized storage tank. This product would meet a significant market need by providing a higher efficiency gas water heater solution for retrofit applications while...
Author(s)
Hoeschele,
Seitzler
Organization(s)
ARBI
Publication Date
Description
Heat pump water heaters offer a significant opportunity to improve water heating performance for the over 40% of U.S. households that heat domestic hot water using electric resistance storage water heaters. Numerous field studies have also been completed documenting performance in a variety of...
Author(s)
Colon,
Martin
Organization(s)
BA-PIRC
Publication Date
Description
The Florida Solar Energy Center (FSEC) has completed a fourth year-long evaluation on residential hot water heating systems in a laboratory environment (east central Florida, hot-humid climate). This report contains a summary of research activities regarding the evaluation of two residential...
Author(s)
Colon,
Martin
Organization(s)
BA-PIRC
Publication Date
Description
The Florida Solar Energy Center (FSEC) has completed a fourth year-long evaluation on residential hot water heating systems in a laboratory environment (east central Florida, hot-humid climate). This report contains a summary of research activities regarding the evaluation of two residential...
Author(s)
Schirber,
Schoenbauer
Organization(s)
NorthernSTAR
Publication Date
Description
High performance water heaters are typically more time consuming and costly to install in retrofit applications, making high performance water heaters difficult to justify economically. However, recent advancements in high performance water heaters have targeted the retrofit market, simplifying...
Author(s)
Mittereder,
Poerschke
Organization(s)
IBACOS
Publication Date
Description
This case study presents a cold-climate project that examines an alternative approach to ground source heat pump (GSHP) ground loop design. The innovative ground loop design is an attempt to reduce the installed cost of the ground loop heat exchange portion of the system by containing the entire...
Author(s)
PNNL
Organization(s)
PNNL
Publication Date
Description
Tankless water heaters can deliver large quantities of hot water under changing load conditions and at a relatively constant temperature, like storage water heaters, but without suffering the standby loss (tank heat loss) of the storage water heaters.
Author(s)
PNNL
Organization(s)
PNNL,
IBACOS,
BSC
Publication Date
Description
This case study about a DOE Building America 2013 Top Innovation features a community-scale project in Tucson, AZ, where solar water heaters generated enough hot water per year to recoup the cost of the system within 4 to 6 years.The homes were built by Pulte with technical assistance from DOE...
Author(s)
BSC
Organization(s)
BSC
Publication Date
Description
Case study describing a building project in the mixed-humid climate zone.
Author(s)
PNNL
Organization(s)
PNNL
Publication Date
Description
Case study of a DOE Zero Energy Ready Home in Seattle, WA, that scored HERS 34 without PV. This 2,000 ft2 system home has R-45 double-stud walls, an unvented flat roof with 2 inches of spray foam plus 18 inches blown cellulose, R-42 XPS under slab, triple-pane windows, and a ductless mini-split heat...
Author(s)
PNNL
Organization(s)
PNNL
Publication Date
Description
Case study of a DOE Zero Energy Ready Home in Herriman, UT, that scored HERS 40 without PV, -1 with PV. This 4,111 ft2 production home has R-23 advanced framed walls, and a vented attic with R-60 blown fiberglass.
Author(s)
PNNL
Organization(s)
PNNL
Publication Date
Description
Case study of a DOE Zero Energy Ready Home in Phoenix AZ that scored HERS 58 without PV or HERS 38 with PV. This 1,700 ft2 affordable home has R-21 framed walls, a sealed closed-cell spray foamed attic, an air-source heat pump with forced air, and a solar combo system that provides PV, hot water...
Author(s)
PNNL
Organization(s)
PNNL
Publication Date
Description
Case study about a DOE Zero Energy Ready Home in Devens MA that scored HERS 35 without PV or HERS -37 with PV. This 2,508 ft2 custom home has R-46 double-stud walls with open–cell spray foam, a vented attic with R-67 blown cellulose, plus R-10 rigid XPS under the slab, R-20 closed-cell spray foam on...
Author(s)
PNNL
Organization(s)
PNNL
Publication Date
Description
Case study of a DOE Zero Energy Ready Home in Devens MA that scored HERS 34 without PV or HERS -21 with PV. This 3,168 ft2 custom home has R-46 double-stud walls, a vented attic with R-67 blown cellulose, plus R-10 rigid XPS under the slab, R-20 closed-cell spray foam on basement walls, triple-pane...
Author(s)
PNNL
Organization(s)
PNNL
Publication Date
Description
Case study describing a 4,763 ft2 certified Passive House that achieved HERS 27 without PV through the construction of R-54 walls that use ICF plus fiberglass cavity insulation, an R-100 vented attic, extensive air sealing and flashing, triple-pane windows, ductless heat pumps, and solar hot water.