Forced Convection Heat Rejection System for Mars Surface Applications

Autors/ores

  • Nathan Colgan UW-Madison
  • Gregory Nellis UW-Madison
  • Mark Anderson UW-Madison

DOI:

https://doi.org/10.17307/wsc.v1i1.344

Paraules clau:

Mars, Heat exchanger, forced convection, heat rejection

Resum

A forced convection heat exchanger for waste heat rejection to the Martian atmosphere is designed based on existing heat transfer and pressure drop correlations for low-Reynolds-number finned tube arrays. The design is optimized to determine the mass-optimal heat exchanger geometry for a range of candidate heat exchanger materials and power loads. For a 100 kW thermal load, the optimal heat exchanger mass is found to be 27.0 kg and a frontal area of 3.94 m2. This is 95% less mass and area than a comparable radiator and only requires 638 W of fan power (or 0.6% of the output power) to operate. Optimal geometries are also found for heat rejection loads of 1 kW to 250kW across a range of coolant and atmosphere temperatures, indicating wide applicability of this technology for Martian heat rejection applications such as cryofuel refrigeration or in-situ resource utilization (ISRU) plant cooling. An experimental facility has been designed and partially constructed to experimentally validate the predicted heat exchanger performance in a Mars-like environment. A subscale heat exchanger has been built based on the predicted mass-optimal geometry. Heat transfer and pressure drop performance data of this heat exchanger will be collected and will refine the modelling predictions.

Biografies de l'autor/a

Nathan Colgan, UW-Madison

Graduate student in the Nuclear Engineering and Engineering Physics Department

Gregory Nellis, UW-Madison

Professor, Department of Mechanical Engineering

Mark Anderson, UW-Madison

Professor, Department of Mechanical Engineering

Referències

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Descàrregues

Publicades

2022-02-25

Com citar

Colgan, N., Nellis, G., & Anderson, M. (2022). Forced Convection Heat Rejection System for Mars Surface Applications. Proceedings of the Wisconsin Space Conference, 1(1). https://doi.org/10.17307/wsc.v1i1.344

Número

Secció

Physics and Engineering