Simulation ARES

8/2/2019 Simulation ARES

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Simulat ion Model


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Present at ion Slide

Landscape Format

Minimum of information on each slide

Use Photos & Drawings

Contrasting Colors


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What is ARES?

ARES is a air revitalization system for the ISS

ARES stands for Air Regeneration System

To generate oxygen from water

To collect and to control cabin CO2To convert CO and H in water and methane

To recover the produced water


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Content s-I ndex

Introduction

Description of ARES

Results

Conclusions


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What is ARES?

ARES is a air revitalization system that is being

ARES stands for Air Regeneration System To generate oxygen from water

To collect and to control cabin CO

To convert CO2 and H2 in water and methaneTo recover the produced water

The main bene its o ARES are the ollowing:ARES allows to save upload weight and volume

It makes long space missions possible


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Ob ect ives of t he ARES model

Solve design problems of equipment andsystem operat on mo e

functional requirements

es gn e pre m nary con ro sys em Perform sensitivit studies trade studies


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Benefit s of ARES

ARES allows to save upload weight andvo ume

It makes long space missions possible


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ARES Descri t ion

ARES consists of three assemblies interconnected:

the Carbon Dioxide Reduction Assembly (CRA)

the Oxygen Generation Assembly (OGA)

Air

H2O

O2O2

H2/H2OH2O

H2O

OGACRACO2/H2O

SteamGenerator

CCA

AdsorberReactor

CHX

ElectrolyserStack

CO2

Mngt

CHX

CH4/CO2/H2/H2O

Air/H2OH2O

H2O VACUUM WRMH2O

CH4/CO2/H2/H2O


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Simulat ion Model Re uirements The model should be able to represent all the main operation

modes of the s stem.

The model should be transient and be able to calculate

averaged consumptions and productions for one cycle. The layout of the model should resemble the layout of the

actual system.

should be similar to the decomposition of the actual ARESsystem into the different assemblies. The model shouldconsist of the following submodels:CCA submodel

OGA submodel


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Simulat ion Model Re uirements

Each assembly submodel should be able to be tested and.

The model should have a control system for each assembly

level.

The simulation model should have all essential functions of

ARES. The level of detail of the model should allowquantitative analyses of fluid parameters (mass flow,pressure, compos on , erma parame ers, anenvironmental parameters.


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Main Simulat ion Model Re uirements

Representar los principales modos de operacin del sistema

energticos y msicos totales y por ciclo

diagrama del flujo del sistema real

(CCA, CRA y OGA) y del sistema global


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ARES Model Descri t ion The ARES model has been developed in EcosimPro

.multidisciplinary problem that can be formulated with DAEs

and discrete events EcosimPro has a set of non-causal reusable libraries and

allows the definition of new components for the existing

The ARES model is made up of the following sub-models: CCA Model

CRA Model

OGA Model

Cabin Model and THC Model


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ARES Model Descri t ion

The ARES model is made up of the next sub-models:

CRA Model

OGA Model ARES Control System

Cabin Model and THC Model

Each sub-model has its own control s stem


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ARES Model Descri t ion

The model has been developed using the following EcosimPro

CONTROL2: Library for the simulation of control system

THERMAL2: Library for the simulation of thermal networks ECLSS: Library for the simulation of environmental control and life support

systems

THERMAL2


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ECLSS librar

This library provides a set of components to simulate the

like cabins, crews, heat exchangers, pipes, pumps, reactors

etc ECLSS library includes thermodynamic functions to calculate

the properties of the following types of fluid mixtures:

Refrigerants of pure substances -> FORTRAN functions used byESATAN/FHTS

Perfect mixtures of ases with or without water -> Functions written in EL(EcosimPro Language)

Pure gases or water whose properties are calculated by interpolation in

data file enerated b means of the ro ert ro ram NIST StandardReference Database 12


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ARES MODEL ARCHI TECTURE - CRA

CR_FC_P_01

CR_FC_P_02 CR_RA_P_01 CR_WR_P_01

CRA_01CRA_03CRA_04 CRA_12CRA_13

RackAir

CR_FC_02

CR_WR_04

Insul_Sab1

GL_Sab2GL_Sab1

Insul_Sab2

WATER

REC

_ _01

CR WR 01

CR_WR_03

c2

GL_Insul_Sab1 GL_Insul_Sab2

VERY

Sabatier1 Sabatier2

_ _

CR_R_05

CR R P 02

c1

GL_CR_PC_03FLOW CONTROLLER

CH4

CR_RA_P_02

_ _ _

CR_PC_03

CR_PC_04

SABATIER REACTORS

MANAGEMENT

CR_R_07CR_R_P_03

CR_R_P_01

CR_PC_P_01

CRA_02CRA_05 CRA_06 CRA_07CRA_09


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ARES MODEL ARCHI TECTURE - ARES

CC _AM_03

ARES_H2_Cntrl

ARES_01 ARES_02ARES_03 ARES_05CCA_13 ARES_12 ARES_13CRA_12CRA_13 OGA_11

c_CO2H2O_to_OGA

Heater_ARES_H2_Cntrl

_

OGACCA CRA

08

control

AR ES_04AR ES_06ARES_07 ARES_08 ARES_10 ARES_15CRA_05


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ARES MODEL ARCHI TECTURE - ARESARES_03 WaterInlet ARES_05

CCA_RackAirInlet CoolantAirInlet

CRA_RackAirInlet

ARES_12

OGA_RackAirInlet

crew

T

Tcabin

ARES_04

_

T RH O2 CO2

cabin

HumiditControl

RHC

ARES

cabin_mixer

ARES_08 CoolantAirOutletRackAirOutlet


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Results

Six day/night cycles have been simulated (53 min..

The sample time for the report generation has been3 secon s

The performance of the model has been about 19%

(ratio between the CPU time and the simulated time)for the test of overall ARES model

The average consumptions or productions for each

c cle of the most interestin variables have beencalculated (energy consumption of each assembly)


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Results

Molar Concent rat ion of CO2 in t he Cabin

0.0035

0.004

0.0025

0.003

[-]

0.0015

0.002

(CO2)

0.0005

0.001

0 100 200 300 400 500 600

Time [ m ]


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Results

Mass Flow of O2 pr oduced in OGA

0.00012

0.00014

]

0.00008

0.0001

[kg/s

0.00004

0.00006

sFlo

0

0.00002Ma

0 100 200 300 400 500 600

Time [ m ]


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Results

Molar Concent rat ion of O2 in t he Cabin

0.22

0.218

-]

0.214

.

y(O2

)

0.212

.

0 100 200 300 400 500 600


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Conclusions

A complete EcosimPro model of the ARES system has

The model keeps a good relationship between model

consumed)

and system operation

assemblies have been developed

refinement in the second phase of the model

Simulation ARES

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