Demand controlled ventilation for multiple zone HVAC systems: CO2-based dynamic reset (RP 1547)

Xingbin Lin, Josephine Lau

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Demand controlled ventilation (DCV) is used to reduce the system outdoor airflow (OA) when the occupancy of the system is under design occupancy. However, the new versions of ASHRAE Standard 62.1-2010 make DCV more difficult to implement for multiple zone HVAC systems. This article proposes a CO2-based and occupancy-sensor-based dynamic reset of OA rate for multiple zone HVAC systems ("CO2-based DR"). This control strategy uses bioeffluent load estimation with a steady-state assumption to calculate and dynamically reset the system OA rate minimum set-point by solving the multiple-zone system equations for current conditions. Building energy and airflow simulations were implemented to assess the energy performance and indoor air quality of this control strategy. The simulation results showed that the average annual system OA rate for CO2-based DR is 14.6% less than the OA rate for without DCV, in which case the system OA is always maintained as constant. The annual monetary saving as a percentage of the baseline case (without DCV) is between 0.3% and 11.0% for 16 climate zones in the United States.

Original languageEnglish (US)
Pages (from-to)875-888
Number of pages14
JournalHVAC and R Research
Volume20
Issue number8
DOIs
StatePublished - Nov 15 2014

Fingerprint

Multiple zones
Ventilation
Air quality
HVAC
Sensors

ASJC Scopus subject areas

  • Building and Construction

Cite this

Demand controlled ventilation for multiple zone HVAC systems : CO2-based dynamic reset (RP 1547). / Lin, Xingbin; Lau, Josephine.

In: HVAC and R Research, Vol. 20, No. 8, 15.11.2014, p. 875-888.

Research output: Contribution to journalArticle

@article{e7b4897306274cb98a682ce1e1303ab3,
title = "Demand controlled ventilation for multiple zone HVAC systems: CO2-based dynamic reset (RP 1547)",
abstract = "Demand controlled ventilation (DCV) is used to reduce the system outdoor airflow (OA) when the occupancy of the system is under design occupancy. However, the new versions of ASHRAE Standard 62.1-2010 make DCV more difficult to implement for multiple zone HVAC systems. This article proposes a CO2-based and occupancy-sensor-based dynamic reset of OA rate for multiple zone HVAC systems ({"}CO2-based DR{"}). This control strategy uses bioeffluent load estimation with a steady-state assumption to calculate and dynamically reset the system OA rate minimum set-point by solving the multiple-zone system equations for current conditions. Building energy and airflow simulations were implemented to assess the energy performance and indoor air quality of this control strategy. The simulation results showed that the average annual system OA rate for CO2-based DR is 14.6{\%} less than the OA rate for without DCV, in which case the system OA is always maintained as constant. The annual monetary saving as a percentage of the baseline case (without DCV) is between 0.3{\%} and 11.0{\%} for 16 climate zones in the United States.",
author = "Xingbin Lin and Josephine Lau",
year = "2014",
month = "11",
day = "15",
doi = "10.1080/10789669.2014.945853",
language = "English (US)",
volume = "20",
pages = "875--888",
journal = "Science and Technology for the Built Environment",
issn = "2374-4731",
publisher = "Taylor and Francis Ltd.",
number = "8",

}

TY - JOUR

T1 - Demand controlled ventilation for multiple zone HVAC systems

T2 - CO2-based dynamic reset (RP 1547)

AU - Lin, Xingbin

AU - Lau, Josephine

PY - 2014/11/15

Y1 - 2014/11/15

N2 - Demand controlled ventilation (DCV) is used to reduce the system outdoor airflow (OA) when the occupancy of the system is under design occupancy. However, the new versions of ASHRAE Standard 62.1-2010 make DCV more difficult to implement for multiple zone HVAC systems. This article proposes a CO2-based and occupancy-sensor-based dynamic reset of OA rate for multiple zone HVAC systems ("CO2-based DR"). This control strategy uses bioeffluent load estimation with a steady-state assumption to calculate and dynamically reset the system OA rate minimum set-point by solving the multiple-zone system equations for current conditions. Building energy and airflow simulations were implemented to assess the energy performance and indoor air quality of this control strategy. The simulation results showed that the average annual system OA rate for CO2-based DR is 14.6% less than the OA rate for without DCV, in which case the system OA is always maintained as constant. The annual monetary saving as a percentage of the baseline case (without DCV) is between 0.3% and 11.0% for 16 climate zones in the United States.

AB - Demand controlled ventilation (DCV) is used to reduce the system outdoor airflow (OA) when the occupancy of the system is under design occupancy. However, the new versions of ASHRAE Standard 62.1-2010 make DCV more difficult to implement for multiple zone HVAC systems. This article proposes a CO2-based and occupancy-sensor-based dynamic reset of OA rate for multiple zone HVAC systems ("CO2-based DR"). This control strategy uses bioeffluent load estimation with a steady-state assumption to calculate and dynamically reset the system OA rate minimum set-point by solving the multiple-zone system equations for current conditions. Building energy and airflow simulations were implemented to assess the energy performance and indoor air quality of this control strategy. The simulation results showed that the average annual system OA rate for CO2-based DR is 14.6% less than the OA rate for without DCV, in which case the system OA is always maintained as constant. The annual monetary saving as a percentage of the baseline case (without DCV) is between 0.3% and 11.0% for 16 climate zones in the United States.

UR - http://www.scopus.com/inward/record.url?scp=84910620386&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84910620386&partnerID=8YFLogxK

U2 - 10.1080/10789669.2014.945853

DO - 10.1080/10789669.2014.945853

M3 - Article

AN - SCOPUS:84910620386

VL - 20

SP - 875

EP - 888

JO - Science and Technology for the Built Environment

JF - Science and Technology for the Built Environment

SN - 2374-4731

IS - 8

ER -