Scroll Pump for Vapor Liquid Mixtures of Refrigerants

Award Information
Agency: Department of Defense
Branch: Defense Advanced Research Projects Agency
Contract: W31P4Q-12-C-0026
Agency Tracking Number: 11SB2-0019
Amount: $99,935.00
Phase: Phase I
Program: SBIR
Awards Year: 2011
Solitcitation Year: 2011
Solitcitation Topic Code: SB112-001
Solitcitation Number: 2011.2
Small Business Information
35 Hartwell Avenue, Lexington, MA, -
Duns: 111046152
Hubzone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 John Dieckmann
 (781) 879-1269
Business Contact
 Renee Wong
Title: Contracting Officer
Phone: (781) 879-1286
Research Institution
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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