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Title: Advanced Rooftop Control (ARC) Retrofit: Field-Test Results

Abstract

The multi-year research study was initiated to find solutions to improve packaged equipment operating efficiency in the field. Pacific Northwest National Laboratory (PNNL), with funding from the U.S. Department of Energy’s (DOE’s) Building Technologies Office (BTO) and Bonneville Power Administration (BPA) conducted this research, development and demonstration (RD&D) study. Packaged equipment with constant speed supply fans is designed to provide ventilation at the design rate at all times when the fan is operating as required by building code. Although there are a number of hours during the day when a building may not be fully occupied or the need for ventilation is lower than designed, the ventilation rate cannot be adjusted easily with a constant speed fan. Therefore, modulating the supply fan in conjunction with demand controlled ventilation (DCV) will not only reduce the coil energy but also reduce the fan energy. The objective of this multi-year research, development and demonstration project was to determine the magnitude of energy savings achievable by retrofitting existing packaged rooftop air conditioners with advanced control strategies not ordinarily used for packaged units. First, through detailed simulation analysis, it was shown that significant energy (between 24% and 35%) and cost savings (38%) from fan, coolingmore » and heating energy consumption could be realized when packaged air conditioning units with gas furnaces are retrofitted with advanced control packages (combining multi-speed fan control, integrated economizer controls and DCV). The simulation analysis also showed significant savings for heat pumps (between 20% and 60%). The simulation analysis was followed by an extensive field test of a retrofittable advanced rooftop unit (RTU) controller.« less

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1096129
Report Number(s):
PNNL-22656
400480000
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English

Citation Formats

Wang, Weimin, Katipamula, Srinivas, Ngo, Hung, Underhill, Ronald M., Taasevigen, Danny J., and Lutes, Robert G. Advanced Rooftop Control (ARC) Retrofit: Field-Test Results. United States: N. p., 2013. Web. doi:10.2172/1096129.
Wang, Weimin, Katipamula, Srinivas, Ngo, Hung, Underhill, Ronald M., Taasevigen, Danny J., & Lutes, Robert G. Advanced Rooftop Control (ARC) Retrofit: Field-Test Results. United States. https://doi.org/10.2172/1096129
Wang, Weimin, Katipamula, Srinivas, Ngo, Hung, Underhill, Ronald M., Taasevigen, Danny J., and Lutes, Robert G. 2013. "Advanced Rooftop Control (ARC) Retrofit: Field-Test Results". United States. https://doi.org/10.2172/1096129. https://www.osti.gov/servlets/purl/1096129.
@article{osti_1096129,
title = {Advanced Rooftop Control (ARC) Retrofit: Field-Test Results},
author = {Wang, Weimin and Katipamula, Srinivas and Ngo, Hung and Underhill, Ronald M. and Taasevigen, Danny J. and Lutes, Robert G.},
abstractNote = {The multi-year research study was initiated to find solutions to improve packaged equipment operating efficiency in the field. Pacific Northwest National Laboratory (PNNL), with funding from the U.S. Department of Energy’s (DOE’s) Building Technologies Office (BTO) and Bonneville Power Administration (BPA) conducted this research, development and demonstration (RD&D) study. Packaged equipment with constant speed supply fans is designed to provide ventilation at the design rate at all times when the fan is operating as required by building code. Although there are a number of hours during the day when a building may not be fully occupied or the need for ventilation is lower than designed, the ventilation rate cannot be adjusted easily with a constant speed fan. Therefore, modulating the supply fan in conjunction with demand controlled ventilation (DCV) will not only reduce the coil energy but also reduce the fan energy. The objective of this multi-year research, development and demonstration project was to determine the magnitude of energy savings achievable by retrofitting existing packaged rooftop air conditioners with advanced control strategies not ordinarily used for packaged units. First, through detailed simulation analysis, it was shown that significant energy (between 24% and 35%) and cost savings (38%) from fan, cooling and heating energy consumption could be realized when packaged air conditioning units with gas furnaces are retrofitted with advanced control packages (combining multi-speed fan control, integrated economizer controls and DCV). The simulation analysis also showed significant savings for heat pumps (between 20% and 60%). The simulation analysis was followed by an extensive field test of a retrofittable advanced rooftop unit (RTU) controller.},
doi = {10.2172/1096129},
url = {https://www.osti.gov/biblio/1096129}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Jul 31 00:00:00 EDT 2013},
month = {Wed Jul 31 00:00:00 EDT 2013}
}