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Heat Transfer Characteristics of the Concentric Disk inside the WFRD Evaporator for the VPCAR Water Recovery System
Technical Paper
2009-01-2487
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
We consider the heat transfer characteristics of an ideal concentric disk used in the Wiped-Film Rotating-Disk (WFRD) evaporator for the Vapor Phase Catalytic Ammonia Removal (VPCAR) water recovery system. A mathematical model is derived to predict the radial temperature distribution and its average over the surface of the disk as a function of system parameters. The model shows self-similarity of the temperature distribution and the existence of a dimensionless parameter S (ratio of heat flux to convection) that can be used as a criterion to optimize the thermal characteristics of the disk in order to approach uniform surface temperature. Comparison of the model to experimental data using global (infrared imager) and local (resistive temperature devices) measurements shows that agreement with the model depends on the ambient condition denoted by the local heat transfer coefficient. The predictive capability of the model provides a rational basis for the design of a low-gravity experiment to investigate the effect on input heat flux on the evaporation of a thin liquid film.
Authors
- W. Duval - NASA Glenn Research Center
- N. Hall - NASA Glenn Research Center
- J. Mackey - Artic Slope Research Corporation
- D. Althausen - Artic Slope Research Corporation
- A. Izadnegahdar - Artic Slope Research Corporation
- E. Litwiller - Enterprise Advisory Services, Inc.
- M. Flynn - NASA Ames Research Center
Citation
Duval, W., Hall, N., Mackey, J., Althausen, D. et al., "Heat Transfer Characteristics of the Concentric Disk inside the WFRD Evaporator for the VPCAR Water Recovery System," SAE Technical Paper 2009-01-2487, 2009, https://doi.org/10.4271/2009-01-2487.Also In
References
- Flynn, M. Borchers, B. 1998 “An Evaluation of the Vapor Phase Catalytic Ammonia Removal Process For Use In A Mars Transit Vehicle,” International Journal of Life Support & Biosphere 5 415 421
- Flynn, M. Fisher, J. Kliss, M. Tleitmat, B. Quinn, G. Fort, J. Nalette, T. Baker, and G. Genovese, J. 2004 “The Development of the Vapor Phase Catalytic Ammonia Removal (VPCAR) Engineering Development Unit,” 2004-01-2495 Proceedings of the 34th International Conference on Environmental Systems Colorado Springs, CO.
- Flynn, M. Tleitmat, M. Nalette, T. Quinn, G. “Performance Testing of the Vapor Phase Catalytic Ammonia Removal Engineering Development Unit,” 2005-01-3033 Proceedings of the 35th International Conference on Environmental Systems Rome, Italy 2005
- Tleimat, B. Tleimat, M. Quinn, G. Flynn, and M. Smith, F. “The Development of the Wipe-Film Rotating-Disk Evaporator for the Reclamation of Water at Microgravity,” 2002-01-2397 Proceedings of the 32nd International Conference on Environmental Systems San Antonio, TX 2002
- Flynn, M. Borchers, B. “Assessment of the Technical Readiness of the Vapor Phase Catalytic Ammonia Removal Process,” 2000-01-2287 Proceedings of the 30th International Conference on Environmental Systems Toulouse, France 2000
- Niederhaus, C. Nahra H. Flynn M. “Fluid Dynamics Assessment of the VPCAR Water Recovery System in Partial and Microgravity,” 2006-01-2131 Proceedings of the International Conference on Environmental Systems Norfolk, VA. 2006
- Hall, N. Niederhaus C. Mackey J. Litwiller E. Flynn M., M. “Thin Film Measurement Assessment of the VPCAR Water Recovery System in Partial and Microgravity” proceedings SAE International Conference on Environmental Systems Chicago, IL 2007
- Hall, N. Perez, M. Litwiller, E. Flynn and M. Mackey, J. “Fluorescence-Based Thin Film Measurements using the VPCAR Water Recovery System in Lunar and Microgravity” Proc. of the 46th AIAA Aerospace Sciences Meeting and Exhibit January 7–10 Reno, Nevada 2008
- Harper, W.B. Brown, D.R. “Mathematical Equations for Heat Conduction in the Fins of Air-cooled Engines,” NACA Rep. 158 1922
- Kern, D.Q. Krauss, A.D. “Extended Surface Heat Transfer,” McGraw-Hill Book Company New York 1972
- Boyce, W.E. DiPrima, R.C. “Elementary Differential Equations and Boundary Value Problem,” John Wiley & Sons, Inc. 2nd. Ed. 1969
- Connell, C.G. “Private Communications,” Department of Mathematics, Indiana University 2009
- Fuji, T. Imura, H. 1972 “Natural convection Heat Transfer from a Plate with Arbitrary Inclination,” Int. J. Heat Mass Transfer 16 755 767
- Holman, J.P. “Heat Transfer,” 4th Ed. McGraw-Hill Book Company New York 1976