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Study and development of a cryogenic heat exchanger for life support systems
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Soliman, M. M. |
| Copyright Year | 1973 |
| Description | A prototype cryogenic heat exchanger for removal of waste heat from a spacecraft environmental control life support system was developed. The heat exchanger uses the heat sink capabilities of the cryogenic propellants and, hence, can operate over all mission phases from prelaunch to orbit, to post landing, with quiescent periods during orbit. A survey of candidate warm fluids resulted in the selection of E-2, a fluorocarbon compound, because of its low freezing point and high boiling point. The final design and testing of the heat exchanger was carried out, however, using Freon-21, which is similar to E-2 except for its low boiling point. This change was motivated by the desire for cost effectiveness of the experimental program. The transient performance of the heat exchanger was demonstrated by an analog simulation of the heat sink system. Under the realistic transient heat load conditions (20 sec ramp from minimum to maximum Freon-21 inlet temperature), the control system was able to maintain the warm fluid outlet temperature within + or - 3 F. For a 20-sec ramp from 0 F to -400 F in the hydrogen inlet temperature, at maximum heat load, the warm fluid outlet temperature was maintained within + or - 7 F. |
| File Size | 23542153 |
| Page Count | 167 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19730018344 |
| Archival Resource Key | ark:/13960/t75t8db8w |
| Language | English |
| Publisher Date | 1973-03-23 |
| Access Restriction | Open |
| Subject Keyword | Life Support Systems Cost Effectiveness Freon Cryogenics Spacecraft Environments Heat Exchangers Heat Sinks Environmental Control Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
