Description |
1 online resource (13 pages) : color illustrations. |
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text txt rdacontent |
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computer c rdamedia |
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online resource cr rdacarrier |
Series |
NREL/CP ; 5500-77092 |
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Conference paper (National Renewable Energy Laboratory (U.S.)) ; 5500-77092.
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Note |
"February 2021." |
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"Presented at the 2020 ACEEE Summer Study on Energy Efficiency in Buildings, August 17-21, 2020." |
Bibliography |
Includes bibliographical references (pages 11-13). |
Funding |
National Renewable Energy Laboratory DE-AC36-08GO28308 |
Note |
Description based on online resource; title from PDF title page (NREL, viewed Aug. 10, 2021). |
Summary |
Rooftop units (RTUs) and other packaged heating, ventilating, and air-conditioning (HVAC) equipment consume more than four quads of energy annually while conditioning more than 50% of the commercial building floor area in the United States. Historically, these systems have low operating efficiencies and receive infrequent maintenance. In addition, the market has a low first cost, run-to-failure, like-for-like replacement mentality and has been slow to adopt change. This paper explores the broad market transformation that has resulted in higher efficiencies and tremendous energy savings. Although there are many factors in this market transformation, this paper highlights: research behind advancements in components and controls; adoption of an operational efficiency metric; raising the bar for high efficiency with the RTU Challenge; market barriers overcome through the Advanced RTU Campaign; upstream and midstream incentive programs and HVAC distribution networks; alignment of the market efficiency drivers of ASHRAE Standard 90.1, federal minimum efficiency standards, the ENERGY STAR® program, and the Consortium for Energy Efficiency's (CEE's) efficiency tiers. Measures of the market transformation include more than 50% increase in RTU efficiencies, more than 1 billion kWh saved and 160,000 RTUs upgraded with high-efficiency measures by the Advanced RTU Campaign partners, large increases of high-efficiency RTUs purchased through incentive programs, and the largest energy savings from any federal minimum standards action. Although these results are impressive, the market transformation is just beginning, and there remain exciting opportunities for improvements in equipment efficiencies and improved operating performance with advanced controls and fault detection and diagnostics. |
Subject |
American Council for an Energy-Efficient Economy.
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Air conditioning -- Efficiency -- United States.
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Heating and ventilation industry -- United States.
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Energy consumption -- United States.
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Mechanical efficiency -- United States.
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Climatisation -- Rendement -- États-Unis.
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Rendement mécanique -- États-Unis.
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Énergie -- Consommation -- États-Unis.
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Air conditioning -- Efficiency
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Energy consumption
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Heating and ventilation industry
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Mechanical efficiency
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United States https://id.oclc.org/worldcat/entity/E39PBJtxgQXMWqmjMjjwXRHgrq
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Indexed Term |
advanced RTU campaign |
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commercial buildings |
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HVAC |
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market transformation |
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rooftop unit |
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RTU |
Genre/Form |
technical reports.
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Technical reports
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Technical reports.
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Rapports techniques.
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Added Author |
National Renewable Energy Laboratory (U.S.), issuing body.
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Standard No. |
1766847 OSTI ID |
Gpo Item No. |
0430-P-04 (online) |
Sudoc No. |
E 9.17:NREL/CP-5500-77092 |
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