National Aeronautics and Space Administration Lyndon B. Johnson Space Center ISS Payloads Office ISS Payloads Office Utilization / Research Cargo Utilization / Research Cargo Familiarization Familiarization April 2005 April 2005 Presented to Presented to Commercial Cargo Service Commercial Cargo Service Industry Day Industry Day OZ3/ Mike Horkachuck OZ3/ Mike Horkachuck Manager, ISS Payload Engineering Manager, ISS Payload Engineering Integration Integration
28
Embed
National Aeronautics and Space Administration Lyndon B. Johnson Space Center ISS Payloads Office Utilization / Research Cargo Familiarization April 2005.
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
National Aeronautics andSpace Administration
Lyndon B. Johnson Space Center
ISS Payloads OfficeISS Payloads OfficeUtilization / Research Cargo Utilization / Research Cargo
Presented to Presented to Commercial Cargo Service Industry DayCommercial Cargo Service Industry DayOZ3/ Mike HorkachuckOZ3/ Mike HorkachuckManager, ISS Payload Engineering IntegrationManager, ISS Payload Engineering Integration
Refrigerators & Freezers Single, Double & Quad. Middeck Locker Payloads International Sub-rack Interface Standard Drawers- 4,
8, 12 Panel Units Small Experiments, Spares Animal Enclosure Modules Gas Bottles, Batteries External Payload Exposure samples Furnace, Material Samples, etc Hardware is certified for the STS launch environment.
It would certainly be of value to NASA, if we don't have a big job to recertify our hardware for return/launch on a commercial vehicle.
Total volume of actual samples is 150 to 250 liters; approximate values per year This is a combination of all samples at +4C, -20C, -80C and –180C, based
on today’s plan. Overhead using an Active (powered) freezer
3-4 times the sample volume would be needed 2-3 times the sample mass (plus sample mass)
Overhead using a Passive (unpowered) freezer; 6-32 times the sample volume would be needed 6-18 times the sample mass would be needed (including PCM) Phase Change Material for colder temperatures (-80C, -180C) is not
currently available (TOX level 3 or 4) Liquid Nitrogen or Dry Ice not available on ISS for return system
However, the cost for passive systems make them very appealing, almost disposable On a per unit cost, passive systems can 10 times less expensive
Minimizing time from loading Passive Freezer on ISS, through undocking, re-entry, landing and recovery of samples to a ground freezer will effect the feasibility of a passive return system 8-12 hours might be possible without phase change; mass only
Science would prefer 6 months (or less) for the return interval
Predictions of Worst-case Assembly Complete Demand in Liters per Year
(Including Packing Factor)
2001 2002 2003 2004 2005
+4 Ascent 198.8 119.1 459.7 169.9 230.4
+4 On Orbit 198.8 119.4 568.2 227.7 227.6
+4 Descent 198.8 40.8 347.0 122.9 51.6
-20 Ascent 80.0 2.1 32.0 8.0 1.6
-20 On Orbit 80.0 60.1 65.4 58.7 35.7
-20 Descent 80.0 60.1 59.6 59.2 35.7
-80 Ascent 88.3 4.2 62.9 0.0 0.0
-80 On Orbit 88.3 50.2 315.5 46.4 64.4
-80 Descent 88.3 53.6 300.4 52.5 64.4
-180 Ascent 22.8 6.1 48.6 1.8 0.4
-180 On Orbit 3.5 37.4 57.4 3.4 0.7
-180 Descent 22.8 40.8 53.4 1.8 0.7
-180 Snap Freeze 1.8 0.6 1.1 0.3Not
specified
Significant amounts of science requires Launch at +4C, but is returned at -80C
-20C samples can generally be returned colder (-80C or -180C)Launching at +4C, but returning at -80C makes the mass and volume trades for passive systems less desirable
Cold stowage volume requirements predictions have changed greatly over the past 5 years
Cold volume dimensions for CBC Cold volume is 2.75” dia x 11.5” deep (6.98 cm dia x 29.2 cm deep). All specimens must pass through dewar neck which is 6.98 cm in diameter.
Cold volume is 1.27L All specimens must pass through dewar neck which is 6.98 cm in diameter Can transport 1 CBC / MLE with space left over for extra stowage 4@ Flight and 2@ Ground CBCs for Cryogenic Transport using LN2 boil-off (2-CP100s delivered, 2-CX100s in cert) (Eng. Unit delivered and in testing)
Single Middeck Locker sized unit Interfaces to Shuttle Middeck, SPACEHAB (with
accommodations), and ISS ExPRESS rack External Dimensions: 10.75” H X 18.125” W X 20.56” D Mass 36.5 lbs (16.56 kg) empty Accommodates up to 30 lb (13.61 kg) payload (with CG
at the center of the cold volume) Cold volume capacity: 0.66 ft3 (19 liters)
Dual Mode heat exchanger Water or Air-cooled
Active thermal control capability with passive Payload (selectable to 0.1 C) Water Cooled:(water @ 16 C) Air Cooled: air @ 22.5 C
Power Consumption Input Voltage: 28 VDC ± 4 VDC Minimum power draw: 0.4 A at 28 V (11 W) Maximum power draw: 7.0 A at 28 V (196 W)
Active thermal control performance is better with water cooling Water Cooled: -185 C to + 4 C (water @ 16 C) Air Cooled: <-80 C to + 4C (air @ 22.5 C) Dual Mode heat exchanger
Water or air-cooled in ISS ExPRESS Rack Air-cooled in Shuttle Middeck
Can keep samples cold for up to 6 hr without power Can hold ≤ -160 C for 6 hour (power off, door closed)