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  • 1
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    Simulation of a steady-state integrated human thermal system. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: The mathematical model of an integrated human thermal system is formulated. The system consists of an external thermal regulation device on the human body. The purpose of the device (a network of cooling tubes held in contact with the surface of the skin) is to maintain the human body in a state of thermoneutrality. The device is controlled by varying the inlet coolant temperature and coolant mass flow rate. The differential equations of the model are approximated by a set of algebraic equations which result from the application of the explicit forward finite difference method to the differential equations. The integrated human thermal system is simulated for a variety of combinations of the inlet coolant temperature, coolant mass flow rate, and metabolic rates.
    Keywords: BIOTECHNOLOGY
    Type: Computers in Biology and Medicine; 2; 1972
    Format: text
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  • 2
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    Simulation of a steady-state integrated human thermal system. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: The mathematical model of an integrated human thermal system is formulated. The system consists of an external thermal regulation device on the human body. The purpose of the device (a network of cooling tubes held in contact with the surface of the skin) is to maintain the human body in a state of thermoneutrality. The device is controlled by varying the inlet coolant temperature and coolant mass flow rate. The differential equations of the model are approximated by a set of algebraic equations which result from the application of the explicit forward finite difference method to the differential equations. The integrated human thermal system is simulated for a variety of combinations of the inlet coolant temperature, coolant mass flow rate, and metabolic rates. Two specific cases are considered: (1) the external thermal regulation device is placed only on the head and (2) the devices are placed on the head and the torso. The results of the simulation indicate that when the human body is exposed to hot environment, thermoneutrality can be attained by localized cooling if the operating variables of the external regulation device(s) are properly controlled.
    Keywords: BIOTECHNOLOGY
    Type: Computers in Biology and Medicine; 2; Feb. 197
    Format: text
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  • 3
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    A review on mathematical models of the human thermal system (1971)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Description: Mathematical and mechanical models of human thermal system thermodynamic/transport processes and external regulation devices for single elements and entire body
    Keywords: BIOTECHNOLOGY
    Type: ; ADEMIE DES SCIENCES
    Format: text
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  • 4
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    Optimization of life support systems and their systems reliability (1971)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The identification, analysis, and optimization of life support systems and subsystems have been investigated. For each system or subsystem that has been considered, the procedure involves the establishment of a set of system equations (or mathematical model) based on theory and experimental evidences; the analysis and simulation of the model; the optimization of the operation, control, and reliability; analysis of sensitivity of the system based on the model; and, if possible, experimental verification of the theoretical and computational results. Research activities include: (1) modeling of air flow in a confined space; (2) review of several different gas-liquid contactors utilizing centrifugal force: (3) review of carbon dioxide reduction contactors in space vehicles and other enclosed structures: (4) application of modern optimal control theory to environmental control of confined spaces; (5) optimal control of class of nonlinear diffusional distributed parameter systems: (6) optimization of system reliability of life support systems and sub-systems: (7) modeling, simulation and optimal control of the human thermal system: and (8) analysis and optimization of the water-vapor eletrolysis cell.
    Keywords: BIOTECHNOLOGY
    Type: NASA-CR-136276
    Format: application/pdf
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  • 5
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    An integrated human thermal system and its unsteady-state simulation (1973)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Description: Consideration of an integrated human thermal system consisting of a human thermal system proper and an external thermal device. A mathematical model of the integrated system has been used in a computer simulation, and the simulation results have been verified through comparison with the results of experiments carried out on nine human subjects. The comparison indicates that the model simulates the system reasonably well.
    Keywords: BIOTECHNOLOGY
    Type: International Journal of Biomedical Engineering; 1; 1, 19; 1973
    Format: text
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  • 6
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    Application of modern optimal control theory to environmental control of confined spaces and life support systems (1970)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Environmental control of confined spaces and life support systems by Pontryagin maximum principle of optimal control theory, discussing cabins, heat exchanger, etc
    Keywords: BIOTECHNOLOGY
    Type: THERMODYNAMICS AND THERMOPHYSICS OF SPACE FLIGHT, SYMPOSIUM; Mar 23, 1970 - Mar 25, 1970; PALO ALTO, CA
    Format: text
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