High heat flux single phase heat exchanger
Abstract
This paper presents the results obtained to date in a program to develop a high heat flux, single-phase heat exchanger for spacecraft thermal management. The intended application is a net generation interface heat exchanger to couple the crew module water thermal bus to the two-phase ammonia main thermal bus in the Space Station Freedom. The large size of the interface heat exchanger is dictated by the relatively poor water-side heat transfer characteristics. The objective of this program is to develop a single-phase heat transfer approach which can achieve heat fluxes and heat transfer coefficients comparable to those of the evaporation ammonia side. A new heat exchanger concept has been developed to meet these objecties. The main feature of this heat exchanger is that it can achieve very high heat fluxes with a pressure drop one to two orders of magnitude lower than those of previous microchannel or jet impingement high heat flux heat exchangers. This paper describes proof-of-concept experiments performed in air and water and presents analytical model of the heat exchanger.
- Publication:
-
AIAA and ASME, 5th Joint Thermophysics and Heat Transfer Conference
- Pub Date:
- June 1990
- Bibcode:
- 1990jtht.confQ....V
- Keywords:
-
- Ammonia;
- Heat Exchangers;
- Heat Transfer;
- Porous Materials;
- Water Heating;
- Heat Storage;
- Space Station Freedom;
- Spacecraft Cabin Atmospheres;
- Fluid Mechanics and Heat Transfer