Compact Diffusion Bonded Heat Exchanger Fatigue Life Simulations (Final Report)

Technical Report · Mon Jun 01 00:00:00 EDT 2020

DOI:https://doi.org/10.2172/1763571· OSTI ID:1763571

Schalansky, Carl P. ^[1]; Zada, Kyle ^[1]; Lance, Blake ^[2]; Koehler, Timothy Philip ^[2]

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1. Vacuum Process Engineering, Inc., Sacramento, CA (United States)
2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Compact diffusion bonded heat exchangers are essential for high pressure heat exchange, but they are subject to thermal fatigue and ramp rate limitations. Simulation of these geometries is challenging with a large range of length and time scales from thousands of mm-sized microchannels inside a m-sized heat exchanger. Multi-physics simulations including thermal, fluid, and solid mechanics components are being used to predict stress within the heat exchangers under these conditions. These predictions can then be used to understand thermal ramp rate limitations while keeping maximum stresses low as well as fatigue life predictions from well-known empirical models.

• Research Organization: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States); Vacuum Process Engineering, Inc., Sacramento, CA (United States)
• Sponsoring Organization: USDOE Office of Fossil Energy (FE); USDOE National Nuclear Security Administration (NNSA)
• DOE Contract Number: AC04-94AL85000; NA0003525
• OSTI ID: 1763571
• Report Number(s): SAND--2020-5976R; 686642
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS