A state-space method for real-time transient simulation of indoor airflow

Qiujian Wang, Yiqun Pan, Mingya Zhu, Zhizhong Huang, Wei Tian, Wangda Zuo, Xu Han, Peng Xu

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Inhomogeneous airflow distribution is common in air-conditioned rooms, especially the large open spaces. To evaluate the thermal comfort of such space, or the control performance of the Heating, Ventilation, and Air Conditioning (HVAC) systems in an efficient way, one will need a fast prediction method to simulate the airflow and temperature distribution. This paper proposes a discrete state-space method, called state-space fluid dynamics (SFD), for the fast indoor airflow simulation. To handle time-varying velocity and temperature field, SFD converts all the governing equations of fluid dynamics into the form of a state-space model. Four typical cases are selected to evaluate both the accuracy and speed of SFD, compared with fast fluid dynamics (FFD), which is another fast airflow simulation program. Results show that SFD is capable of achieving faster-than-real-time airflow simulation with an accuracy similar to FFD. The computing time of SFD is longer than FFD when the time step size is the same. However, SFD can generally produce better results than FFD when the time step size is larger, which allows SFD run faster than FFD.

Original languageEnglish (US)
Pages (from-to)184-194
Number of pages11
JournalBuilding and Environment
Volume126
DOIs
StatePublished - Dec 1 2017
Externally publishedYes

Fingerprint

State space methods
fluid dynamics
Fluid dynamics
airflow
simulation
air
heat pump
conditioning
method
time
Temperature distribution
Thermal comfort
performance
air conditioning
open space
Air conditioning
Ventilation

Keywords

  • CFD
  • FFD
  • Real-time simulation
  • State-space fluid dynamics (SFD)
  • Transient air flow simulation

ASJC Scopus subject areas

  • Environmental Engineering
  • Civil and Structural Engineering
  • Geography, Planning and Development
  • Building and Construction

Cite this

A state-space method for real-time transient simulation of indoor airflow. / Wang, Qiujian; Pan, Yiqun; Zhu, Mingya; Huang, Zhizhong; Tian, Wei; Zuo, Wangda; Han, Xu; Xu, Peng.

In: Building and Environment, Vol. 126, 01.12.2017, p. 184-194.

Research output: Contribution to journalArticle

Wang, Q, Pan, Y, Zhu, M, Huang, Z, Tian, W, Zuo, W, Han, X & Xu, P 2017, 'A state-space method for real-time transient simulation of indoor airflow', Building and Environment, vol. 126, pp. 184-194. https://doi.org/10.1016/j.buildenv.2017.09.032
Wang, Qiujian ; Pan, Yiqun ; Zhu, Mingya ; Huang, Zhizhong ; Tian, Wei ; Zuo, Wangda ; Han, Xu ; Xu, Peng. / A state-space method for real-time transient simulation of indoor airflow. In: Building and Environment. 2017 ; Vol. 126. pp. 184-194.
@article{03412620d381460d945cde5adf70afc0,
title = "A state-space method for real-time transient simulation of indoor airflow",
abstract = "Inhomogeneous airflow distribution is common in air-conditioned rooms, especially the large open spaces. To evaluate the thermal comfort of such space, or the control performance of the Heating, Ventilation, and Air Conditioning (HVAC) systems in an efficient way, one will need a fast prediction method to simulate the airflow and temperature distribution. This paper proposes a discrete state-space method, called state-space fluid dynamics (SFD), for the fast indoor airflow simulation. To handle time-varying velocity and temperature field, SFD converts all the governing equations of fluid dynamics into the form of a state-space model. Four typical cases are selected to evaluate both the accuracy and speed of SFD, compared with fast fluid dynamics (FFD), which is another fast airflow simulation program. Results show that SFD is capable of achieving faster-than-real-time airflow simulation with an accuracy similar to FFD. The computing time of SFD is longer than FFD when the time step size is the same. However, SFD can generally produce better results than FFD when the time step size is larger, which allows SFD run faster than FFD.",
keywords = "CFD, FFD, Real-time simulation, State-space fluid dynamics (SFD), Transient air flow simulation",
author = "Qiujian Wang and Yiqun Pan and Mingya Zhu and Zhizhong Huang and Wei Tian and Wangda Zuo and Xu Han and Peng Xu",
year = "2017",
month = "12",
day = "1",
doi = "10.1016/j.buildenv.2017.09.032",
language = "English (US)",
volume = "126",
pages = "184--194",
journal = "Building and Environment",
issn = "0360-1323",
publisher = "Elsevier BV",

}

TY - JOUR

T1 - A state-space method for real-time transient simulation of indoor airflow

AU - Wang, Qiujian

AU - Pan, Yiqun

AU - Zhu, Mingya

AU - Huang, Zhizhong

AU - Tian, Wei

AU - Zuo, Wangda

AU - Han, Xu

AU - Xu, Peng

PY - 2017/12/1

Y1 - 2017/12/1

N2 - Inhomogeneous airflow distribution is common in air-conditioned rooms, especially the large open spaces. To evaluate the thermal comfort of such space, or the control performance of the Heating, Ventilation, and Air Conditioning (HVAC) systems in an efficient way, one will need a fast prediction method to simulate the airflow and temperature distribution. This paper proposes a discrete state-space method, called state-space fluid dynamics (SFD), for the fast indoor airflow simulation. To handle time-varying velocity and temperature field, SFD converts all the governing equations of fluid dynamics into the form of a state-space model. Four typical cases are selected to evaluate both the accuracy and speed of SFD, compared with fast fluid dynamics (FFD), which is another fast airflow simulation program. Results show that SFD is capable of achieving faster-than-real-time airflow simulation with an accuracy similar to FFD. The computing time of SFD is longer than FFD when the time step size is the same. However, SFD can generally produce better results than FFD when the time step size is larger, which allows SFD run faster than FFD.

AB - Inhomogeneous airflow distribution is common in air-conditioned rooms, especially the large open spaces. To evaluate the thermal comfort of such space, or the control performance of the Heating, Ventilation, and Air Conditioning (HVAC) systems in an efficient way, one will need a fast prediction method to simulate the airflow and temperature distribution. This paper proposes a discrete state-space method, called state-space fluid dynamics (SFD), for the fast indoor airflow simulation. To handle time-varying velocity and temperature field, SFD converts all the governing equations of fluid dynamics into the form of a state-space model. Four typical cases are selected to evaluate both the accuracy and speed of SFD, compared with fast fluid dynamics (FFD), which is another fast airflow simulation program. Results show that SFD is capable of achieving faster-than-real-time airflow simulation with an accuracy similar to FFD. The computing time of SFD is longer than FFD when the time step size is the same. However, SFD can generally produce better results than FFD when the time step size is larger, which allows SFD run faster than FFD.

KW - CFD

KW - FFD

KW - Real-time simulation

KW - State-space fluid dynamics (SFD)

KW - Transient air flow simulation

UR - http://www.scopus.com/inward/record.url?scp=85041411672&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85041411672&partnerID=8YFLogxK

U2 - 10.1016/j.buildenv.2017.09.032

DO - 10.1016/j.buildenv.2017.09.032

M3 - Article

VL - 126

SP - 184

EP - 194

JO - Building and Environment

JF - Building and Environment

SN - 0360-1323

ER -