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...

Full description

Saved in:
Bibliographic Details
Main Authors: Arquiza, Jose Maria Reynaldo Apollo, Morrow, Robert, Remiker, Ross, Hunter, Jean B.
Format: text
Published: Animo Repository 2017
Subjects:
Online Access:https://animorepository.dlsu.edu.ph/faculty_research/12955
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: De La Salle University
id oai:animorepository.dlsu.edu.ph:faculty_research-13164
record_format eprints
spelling 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
institution De La Salle University
building De La Salle University Library
continent Asia
country Philippines
Philippines
content_provider De La Salle University Library
collection DLSU Institutional Repository
topic Space shuttles—Waste disposal
Waste products —Drying
Aerospace Engineering
Engineering
spellingShingle 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
description 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.
format text
author Arquiza, Jose Maria Reynaldo Apollo
Morrow, Robert
Remiker, Ross
Hunter, Jean B.
author_facet Arquiza, Jose Maria Reynaldo Apollo
Morrow, Robert
Remiker, Ross
Hunter, Jean B.
author_sort 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
title_sort experimental and numerical studies on the treatment of wet astronaut trash by forced-convection drying
publisher Animo Repository
publishDate 2017
url https://animorepository.dlsu.edu.ph/faculty_research/12955
_version_ 1808616621325942784