Design, Fabrication and Characterization of Microchannel Heat Exchangers for Fossil-Fired Supercritical CO2 Cycles

 

Expanded Heat Exchanger Architecture<br/>and Detailed Flow Paths
Expanded Heat Exchanger Architecture
and Detailed Flow Paths
Performer: 
Oregon State University
Website:  Oregon State University
Award Number:  FE0024064
Project Duration:  10/01/2014 – 09/30/2017
Total Award Value:  $639,188
DOE Share:  $500,199
Performer Share:  $138,989
Technology Area:  Advanced Combustion Systems
Key Technology:  Enabling Technologies/Innovative Concepts
Location:  Corvallis, Oregon

Project Description

Oregon State University, with support from Carnegie Mellon University, will develop reliable, versatile, highly effective low-pressure-drop designs for the high-temperature and high-pressure heat exchangers (HTPHX) required for fossil-fired supercritical carbon dioxide (SCO2) plants by use of microchannel architectures. Two approaches towards manufacturing the microchannel HTPHX will be studied. The first, the traditional approach, is micro-lamination, which consists of micromachining features into thin sheets of metal and diffusion-bonding these layers. The second approach is novel and uses additive manufacturing (AM) through directed localized melting using an e-beam or laser. Heat exchangers achieved by both approaches will be designed, fabricated, and tested in a thermofluidic characterization facility with data being used to validate parallel numerical simulations of the micro HTPHX concepts. Oregon State has developed microchannel solar receivers with SCO2 as the working fluid under DOE contract DE-EE0005801.

Project Benefits

The Oregon State project will enable ultra-compact, highly effective low-pressure-drop designs of heat exchangers for fossil-fired SCO2 cycles. The extreme temperatures and pressures associated with the HTPHX necessitate the use of expensive superalloys. In order to reduce the cost, it is imperative that the devices be compact. This project aims to dramatically reduce the size of the HTPHX by use of microchannel technology. The novel approach of AM is expected to produce further reductions in pressure drop, material usage, and weight.

Contact Information

Federal Project Manager 
Robin Ames: robin.ames@netl.doe.gov
Technology Manager 
John Rockey: john.rockey@netl.doe.gov
Principal Investigator 
Vinod Narayanan: vinod.narayanan@oregonstate.edu
 

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