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Title: Simplified Space Conditioning in Low-Load Homes: Results from the Fresno, California, Retrofit Unoccupied Test House

Abstract

In this study, the Building America team, IBACOS, sought to determine cost-effective, energy-efficient solutions for heating and cooling houses. To this end, the team performed field testing in a retrofit unoccupied test house in Fresno, California, to evaluate three air-based heating, ventilation, and air conditioning (HVAC) distribution systems during heating, cooling, and midseason conditions. These included a typical airflow ducted system to the bedrooms, a low airflow ducted system to the bedrooms, and a system with no ductwork to the bedrooms. The relative ability of each of the three systems was assessed with respect to relevant Air Conditioning Contractors of America (ACCA) and ASHRAE standards for house temperature uniformity and stability, respectively. Computational fluid dynamics modeling also was performed and refined based on comparison to field test results to determine the air flow rate into the bedrooms of over-door and bottom-of-door air transfer grilles.

Authors:
 [1];  [1]
  1. IBACOS, Inc., Pittsburgh, PA (United States)
Publication Date:
Research Org.:
IBACOS, Inc., Pittsburgh, PA (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Building Technologies Office (EE-5B)
OSTI Identifier:
1220988
Report Number(s):
DOE/GO-102014-4299
6703
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
residential; Residential Buildings; IBACOS; Building America; field test results; computational fluid dynamics; CFD; room-to-room uniformity; mini-split; single point; HVAC; Fresno, California; retrofit unoccupied test house; model validation; ACCA Manual RS; ASHRAE Standard 55; occupant comfort; space conditioning; 50% Building America Benchmark; hot mixed-dry; low airflow

Citation Formats

Stecher, Dave, and Poerschke, Andrew. Simplified Space Conditioning in Low-Load Homes: Results from the Fresno, California, Retrofit Unoccupied Test House. United States: N. p., 2014. Web. doi:10.2172/1220988.
Stecher, Dave, & Poerschke, Andrew. Simplified Space Conditioning in Low-Load Homes: Results from the Fresno, California, Retrofit Unoccupied Test House. United States. doi:10.2172/1220988.
Stecher, Dave, and Poerschke, Andrew. Sat . "Simplified Space Conditioning in Low-Load Homes: Results from the Fresno, California, Retrofit Unoccupied Test House". United States. doi:10.2172/1220988. https://www.osti.gov/servlets/purl/1220988.
@article{osti_1220988,
title = {Simplified Space Conditioning in Low-Load Homes: Results from the Fresno, California, Retrofit Unoccupied Test House},
author = {Stecher, Dave and Poerschke, Andrew},
abstractNote = {In this study, the Building America team, IBACOS, sought to determine cost-effective, energy-efficient solutions for heating and cooling houses. To this end, the team performed field testing in a retrofit unoccupied test house in Fresno, California, to evaluate three air-based heating, ventilation, and air conditioning (HVAC) distribution systems during heating, cooling, and midseason conditions. These included a typical airflow ducted system to the bedrooms, a low airflow ducted system to the bedrooms, and a system with no ductwork to the bedrooms. The relative ability of each of the three systems was assessed with respect to relevant Air Conditioning Contractors of America (ACCA) and ASHRAE standards for house temperature uniformity and stability, respectively. Computational fluid dynamics modeling also was performed and refined based on comparison to field test results to determine the air flow rate into the bedrooms of over-door and bottom-of-door air transfer grilles.},
doi = {10.2172/1220988},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Feb 01 00:00:00 EST 2014},
month = {Sat Feb 01 00:00:00 EST 2014}
}

Technical Report:

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  • Field testing was performed in a retrofit unoccupied test house in Fresno, California. Three air-based heating, ventilation, and air conditioning (HVAC) distribution systems -- a typical airflow ducted system to the bedrooms, a low airflow ducted system to the bedrooms, and a system with no ductwork to the bedrooms -- were evaluated during heating, cooling, and midseason conditions. The relative ability of each of the three systems was assessed with respect to relevant Air Conditioning Contractors of America (ACCA) and ASHRAE standards for house temperature uniformity and stability, respectively. Computational fluid dynamics (CFD) modeling also was performed and refined basedmore » on comparison to field test results to determine the air flow rate into the bedrooms of over-door and bottom-of-door air transfer grilles.« less
  • Field testing was performed in a new construction unoccupied test house in Pittsburgh, Pennsylvania. Four air-based heating, ventilation, and air conditioning distribution systems--a typical airflow ducted system to the bedrooms, a low airflow ducted system to the bedrooms, a system with transfer fans to the bedrooms, and a system with no ductwork to the bedrooms--were evaluated during heating, cooling, and midseason conditions. The relative ability of each system was assessed with respect to relevant Air Conditioning Contractors of America and ASHRAE standards for house temperature uniformity and stability, respectively.
  • Field testing was performed in a new construction unoccupied test house in Pittsburgh, PA. Four air-based heating, ventilation, and air conditioning distribution systems—a typical airflow ducted system to the bedrooms, a low airflow ducted system to the bedrooms, a system with transfer fans to the bedrooms, and a system with no ductwork to the bedrooms—were evaluated during heating, cooling, and midseason conditions. The relative ability of each system was assessed with respect to relevant Air Conditioning Contractors of America and ASHRAE standards for house temperature uniformity and stability, respectively.
  • Commissioning of instrumentation and limited short-term testing have been completed on a retrofit unoccupied test house in Fresno, California. This house is intended to be used as a laboratory in which several different methods of space conditioning distribution will be evaluated. This report provides background on the project, including specifications of the house and models used in its development, along with models to be evaluated through its operation.
  • Commissioning of instrumentation and limited short-term testing have been completed on a retrofit unoccupied test house in Fresno, California. This house is intended to be used as a laboratory in which several different methods of space conditioning distribution will be evaluated. This report provides background on the project, including specifications of the house and models used in its development, along with models to be evaluated through its operation.