Identification of Flow and Volume Parameters in Multizone Systems Using a Single Gas Tracer Technique
- Pacific Northwest Laboratory (PNL), Richland, WA (United States)
- Univ. of Illinois at Urbana, IL (United States)
This work evaluates a new method, based upon tracer gas techniques, for determining interzonal airflows and effective volumes in a multizone enclosure. The proposed method uses a single tracer gas to disturb the zones. A state-space formulation is used to model the multizone system. The concentration data are used in combination with a recursive least-squares identification algorithm to determine all of the interzonal airflows and effective volumes. A three-zone experimental test facility was constructed to validate the proposed method. The results indicate that the gas technique was able to estimate the interzonal airflows and effective volumes of the experimental facility to within 10% in most cases. The tests also showed that for a three-zone system, the best accuracy was obtained using a sampling interval, T, in the range 0.1 ≤ T/$$\tau$$ min ≤ 0.2. The fastest time constant of the system, $$\tau$$ min, is based upon the airflows and effective volumes of the continuous-time system representation.
- Research Organization:
- Pacific Northwest Laboratory (PNL), Richland, WA (United States)
- Sponsoring Organization:
- USDOE Office of Nuclear Energy (NE)
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 6296151
- Report Number(s):
- PNL-SA--18944; CONF-910127--4; ON: DE91006894
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
420400* -- Engineering-- Heat Transfer & Fluid Flow
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
AIR CONDITIONING
AIR FLOW
ALGORITHMS
COOLING
DATA
DIFFERENTIAL EQUATIONS
EQUATIONS
EXPERIMENTAL DATA
FLUID FLOW
FLUID MECHANICS
GAS FLOW
HEATING
INFORMATION
LEAST SQUARE FIT
MATHEMATICAL LOGIC
MATRICES
MAXIMUM-LIKELIHOOD FIT
MECHANICS
NUMERICAL DATA
NUMERICAL SOLUTION
REFRIGERATION
VOLUME