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Modeling and Validation of the Ambient and Variable Pressure Growth Chamber Models
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English
Abstract
The development of regenerative life support systems (RLSS) to support long duration manned space exploration is of great importance. To design future chambers effectively, it is necessary to model both chamber performance and plant growth in current systems. The Johnson Space Center RLSS test bed, which consists of the Variable Pressure Growth Chamber (VPGC) and the Ambient Pressure Growth Chamber (APGC), is a facility that is being used to investigate plant growth and support hardware integration. Detailed and simplified models of the VPGC and APGC have been developed to investigate system performance and response to changes in loading as well as to study long-term plant growth under varying environmental conditions, including temperature, light level, CO2 level, dew point or relative humidity, and photoperiod. To support these studies, models of two crops, lettuce and wheat, have also been developed and integrated into the detailed and simplified simulations of each chamber. This paper will discuss the results of the development effort of the analytical simulations of the VPGC and APGC and compare the data from three previous crop growth experiments against model predictions.
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Citation
Edeen, M., McFadden, C., and Miller, A., "Modeling and Validation of the Ambient and Variable Pressure Growth Chamber Models," SAE Technical Paper 932171, 1993, https://doi.org/10.4271/932171.Also In
References
- McFadden C. D. Miller A. M. Computer Modeling of the Variable Pressure Growth Chamber Using the CASE/A Simulation Package 22nd ICES SAE paper no. 921354 Seattle, Washington July 1992
- McDonnell Douglas Space Systems Company Regenerative Life Support system Testing, Modeling, and Database Development Final Report NAS9-17885, Task No. 5.17.1, MDC 91H0222 September 1991
- Bugbee Bruce August 12 1992
- Bugbee B. G. Determining the Potential Productivity of Food Crops in Controlled Environments Adv. in Space Research 1991
- Bugbee B. G. Salisbury F. B. Current and Potential Productivity of Wheat for a Controlled Environment Life Support System Adv. Space Research 9 8 5 15 1989
- Sirko R. J. McCormack A. C. Edeen M. A. Plant Canopy Transpiration in Bioregenerative Life Support systems: The Link Between Mechanistic and Empirical Models SAE 921355 22nd ICES Seattle, WA July 1992
- Barta D. J. Edeen M. A. Eckhardt B. D. Regenerative Life Support Systems Test Bed Performance: Lettuce Crop Characterization SAE 921391 22nd ICES Seattle, WA July 1992