Scroll Pump for Vapor Liquid Mixtures of Refrigerants

Award Information
Agency:
Department of Defense
Branch
Defense Advanced Research Projects Agency
Amount:
$99,935.00
Award Year:
2011
Program:
SBIR
Phase:
Phase I
Contract:
W31P4Q-12-C-0026
Agency Tracking Number:
11SB2-0019
Solicitation Year:
2011
Solicitation Topic Code:
SB112-001
Solicitation Number:
2011.2
Small Business Information
TIAX LLC
35 Hartwell Avenue, Lexington, MA, -
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
111046152
Principal Investigator:
John Dieckmann
Director/PI
(781) 879-1269
dieckmann.j@tiaxllc.com
Business Contact:
Renee Wong
Contracting Officer
(781) 879-1286
wong.renee@tiaxllc.com
Research Institution:
n/a
Abstract
The purpose of this topic is to develop a pump that can pump two-phase, liquid and vapor mixtures of common refrigerants and heat transfer fluids, without oil lubrication. The challenges of pumping in this regime are well known: Two-phase, liquid-vapor refrigerant mixtures are a mixture of saturated liquid and saturated vapor, by definition meaning that there is zero net positive suction head. Many pump types are highly susceptible to cavitation under these conditions, leading to rough operation, poor performance, and erosion and ultimate destruction of pump elements, especially centrifugal pump impellers. The common fluorocarbon refrigerants and heat transfer fluids are generally low in liquid viscosity and offer no boundary lubrication type lubricity, making mechanical design of a pump to handle these fluids challenging with respect to both mechanical friction losses and the wear life of rotating shafts, bearings, and pump elements. To meet the need for a pump that can handle two-phase, saturated liquid-vapor mixtures of refrigerants and similar heat transfer fluids, TIAX proposes to develop a scroll type pump that is tailored specifically for this purpose.

* information listed above is at the time of submission.

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