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Low-Cost Phase-Distribution Enhancement for Two-Phase Heat Exchangers

Award Information

Agency:
Department of Defense
Branch:
Navy
Award ID:
Program Year/Program:
2014 / SBIR
Agency Tracking Number:
N141-068-1046
Solicitation Year:
2014
Solicitation Topic Code:
N141-068
Solicitation Number:
2014.1
Small Business Information
Mainstream Engineering Corporation
200 Yellow Place Pines Industrial Center Rockledge, FL 32955-5327
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 2014
Title: Low-Cost Phase-Distribution Enhancement for Two-Phase Heat Exchangers
Agency / Branch: DOD / NAVY
Contract: N00014-14-P-1167
Award Amount: $79,812.00
 

Abstract:

Military Environmental Control Units (ECUs) are one of the greatest consumers of electric energy in forward operating bases (FOBs). Microchannel condensers have replaced tube-fin coils in both military ECUs and commercial air conditioners to improve system efficiency. Flow into the condenser is single-phase superheated vapor and therefore uniform flow distribution through multiple parallel microchannel arrays is easily achieved. Manufacturers are interested in exploiting the same benefits by replacing the tube-fin evaporator coil with a microchannel heat exchanger. However, flow into the evaporator is a saturated mixture of liquid and vapor refrigerant, typically at a thermodynamic quality of 0.1 0.4, and therefore two-phase flow distribution through a multitude of parallel microchannels can be very non-uniform. In this proposal, Mainstream compares multiple concepts for achieving two-phase distribution in a microchannel evaporator. Pros and cons of each concept regarding cost, manufacturability, size, and weight are summarized. A final concept is selected for investigation in Phase I. A preliminary two-phase finite element model of the phase distribution phenomena for the selected concept is presented and results are discussed. Based on this model we expect to reduce the two-phase maldistribution to less than 10%.

Principal Investigator:

Joshua Sole
Sr. Engineer
(321) 631-3550
jsole@mainstream-engr.com

Business Contact:

Michael Rizzo
CFO
(321) 631-3550
mar@mainstream-engr.com
Small Business Information at Submission:

Mainstream Engineering Corporation
200 Yellow Place Pines Industrial Center Rockledge, FL 32955-5327

EIN/Tax ID: 592744408
DUNS: N/A
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No