ESM Analysis of BioSim Configurations

Izaak Neveln

General Engineering

University of Illinois

Advisors: Haibei Jiang

Professor Luis Rodriguez

Overview

Define ESM

BioSim configurations

Research Method

Results

Conclusions and improvements

The Mystery

0

2

4

6

8

10

12

Mission Duration vs. Cost

NonregenerableRegenerable P/CHybridBioregenerable

Mission Duration

Co

st

Shuttle Lunar? Mars?

Equivalent System Mass (ESM)

Proxy for system cost

Simplifies various aspects of system into single

metric

Volume, Power, Cooling, and Crewtime all

converted to mass value with equivalence factors.

Ex. Nuclear Reactor is 1500 kg and produces 3 kW

Peq = (1500 kg) / (3 kW) = 500 kg/kW

BioSim Configuration

eXtensible Markup Language (XML)

Creates system components

Defines store and flow-rate values

Additional attributes (failure and perturbation)

Creates crew and defines crew activity

The Solution

BioSim can determine system reliability

How long does the crew last?

ESM analysis can determine system cost

An ESM calculator integrated with BioSim could

give insight to the values on the mission length vs.

cost graph

But How?

Two Options

XML interpreter for NASA's Excel and Visual Basic

derived Advanced Life Support Sizing Analysis Tool

(ALSSAT)

Coding of a new JAVA based tool

ALSSAT

Courtesy of NASA

ESMcalc

Interface for JAVA based ESMcalc.

Currently has

inputs for mission

length and type, and

takes all XML

configuration values

into consideration.

Does it perform?

A = ALSSAT

B = ESMcalc

CM = Crewmembers

Lunar Surface Mission

100 days

Varied Crew Size

Partially Closed

Based on Christian's water recovery system analysis configuration

2 CM (A)

4 CM (A)

6 CM (A)

8 CM (A)

2 CM (B)

4 CM (B)

6 CM (B)

8 CM (B)

0

1000

2000

3000

4000

5000

6000

7000

8000

9000

10000

Crew Size Comparison

Water:

Waste:

Thermal:

Food:

Air:

ESM

(kg)

Varied Mission Length

180 (A)

360 (A)

540 (A)

720 (A)

180 (B)

360 (B)

540 (B)

720 (B)

0.00

5000.00

10000.00

15000.00

20000.00

25000.00

30000.00

Time Comparison

Water:

Waste:

Thermal:

Food:

Air:

Mission Length (Days)

ESM

(kg

)

A = ALSSAT

B = ESMcalc

-Mars Transit Mission

-6 Crew Members

-Varied Mission Length

-Partially Closed

-Crop Added

Based on David's semi-closed baseline configuration

Slope Comparison

2 4 6 8

0

1000

2000

3000

4000

5000

6000

7000

8000

9000

10000

Varied Crew SizeALSSAT

ESMcalc

Crew Size

ESM

(kg)

180 360 540 720

0

5000

10000

15000

20000

25000

30000

Varied Mission Length

Mission Length (Days

ESM

(kg)

Conclusions

No way to physically test results

Trends are accurate with ALSSAT

Lower ESM was expected

Viable tool for comparing costs of BioSim

configurations

Future Work

More tests to further validate the ESMcalc program

More complete statistical analysis with more data

Updating calculator with more accurate models

Give user more options for input and output of

ESMcalc

Acknowledgements and Funding

Thanks to Haibei Jiang, David Kane, Christian

Douglass, Scott Bell, and Professor Luis Rodriguez.

Funded by the NASA Illinois Space Grant

Consortium, the Boeing Company, and NASA grant

number NNJ06HA03G.

Questions?