Experimental and numerical studies on the treatment of wet astronaut trash by forced-convection drying
During long-term space missions, astronauts generate wet trash, including food containers with uneaten portions, moist hygiene wipes and wet paper towels. This waste produces two problems: the loss of water and the generation of odors and health hazards by microbial growth. These problems are solved...
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oai:animorepository.dlsu.edu.ph:faculty_research-131642024-08-12T01:18:26Z Experimental and numerical studies on the treatment of wet astronaut trash by forced-convection drying Arquiza, Jose Maria Reynaldo Apollo Morrow, Robert Remiker, Ross Hunter, Jean B. During long-term space missions, astronauts generate wet trash, including food containers with uneaten portions, moist hygiene wipes and wet paper towels. This waste produces two problems: the loss of water and the generation of odors and health hazards by microbial growth. These problems are solved by a closed-loop, forced-convection, heat-pump drying system which stops microbial activity by both pasteurization and desiccation and recovers water in a gravity-independent porous media condensing heat exchanger. A transient, pseudo- homogeneous continuum model for the drying of wet ersatz trash was formulated for this system. The model is based on the conservation equations for energy and moisture applied to the air and solid phases and includes the unique trash characteristic of having both dry and wet solids. Experimentally determined heat and mass transfer coefficients, together with the moisture sorption equilibrium relationship for the wet material are used in the model. The resulting system of differential equations is solved by the finite-volume method as implemented by the commercial software COMSOL Model simulations agreed well with experimental data under certain condi- tions. The validated model will be used in the optimization of the entire closed-loop system consisting of fan, air heater, dryer vessel, heat-pump condenser, and heat-recovery modules. 2017-01-01T08:00:00Z text https://animorepository.dlsu.edu.ph/faculty_research/12955 Faculty Research Work Animo Repository Space shuttles—Waste disposal Waste products —Drying Aerospace Engineering Engineering |
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Space shuttles—Waste disposal Waste products —Drying Aerospace Engineering Engineering Arquiza, Jose Maria Reynaldo Apollo Morrow, Robert Remiker, Ross Hunter, Jean B. Experimental and numerical studies on the treatment of wet astronaut trash by forced-convection drying |
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During long-term space missions, astronauts generate wet trash, including food containers with uneaten portions, moist hygiene wipes and wet paper towels. This waste produces two problems: the loss of water and the generation of odors and health hazards by microbial growth. These problems are solved by a closed-loop, forced-convection, heat-pump drying system which stops microbial activity by both pasteurization and desiccation and recovers water in a gravity-independent porous media condensing heat exchanger. A transient, pseudo- homogeneous continuum model for the drying of wet ersatz trash was formulated for this system. The model is based on the conservation equations for energy and moisture applied to the air and solid phases and includes the unique trash characteristic of having both dry and wet solids. Experimentally determined heat and mass transfer coefficients, together with the moisture sorption equilibrium relationship for the wet material are used in the model. The resulting system of differential equations is solved by the finite-volume method as implemented by the commercial software COMSOL Model simulations agreed well with experimental data under certain condi- tions. The validated model will be used in the optimization of the entire closed-loop system consisting of fan, air heater, dryer vessel, heat-pump condenser, and heat-recovery modules. |
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Arquiza, Jose Maria Reynaldo Apollo Morrow, Robert Remiker, Ross Hunter, Jean B. |
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Arquiza, Jose Maria Reynaldo Apollo Morrow, Robert Remiker, Ross Hunter, Jean B. |
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Arquiza, Jose Maria Reynaldo Apollo |
title |
Experimental and numerical studies on the treatment of wet astronaut trash by forced-convection drying |
title_short |
Experimental and numerical studies on the treatment of wet astronaut trash by forced-convection drying |
title_full |
Experimental and numerical studies on the treatment of wet astronaut trash by forced-convection drying |
title_fullStr |
Experimental and numerical studies on the treatment of wet astronaut trash by forced-convection drying |
title_full_unstemmed |
Experimental and numerical studies on the treatment of wet astronaut trash by forced-convection drying |
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experimental and numerical studies on the treatment of wet astronaut trash by forced-convection drying |
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2017 |
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https://animorepository.dlsu.edu.ph/faculty_research/12955 |
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