Positive Displacement Compressors
ASHRAE Technical Committee 8.1

Meeting Documents

Download documents from previous committee meetings below according to the appropriate society year. ASHRAE's society year begins on July 1 and ends June 30.

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Other Publications

Additional documents produced by the TC may be available for direct download or for purchase through the ASHRAE Bookstore, as noted below.


ASHRAE members have free access to research project final reports. Non-ASHRAE members can purchase research reports for $30 per article from the ASHRAE Bookstore found at this link.

Membership Plan

The TC membership plan can be found at this link.


Conference  Program Title
Las Vegas 2022 Seminar 37 - Reduced Order Modeling For HVAC&R Systems and Their Components

Semi-Empirical Compressor Model Evaluation Considering Modulation and Extrapolation Performance - Kalen S. Gabel, Graduate Research Assistant, Oklahoma State University

Reduced-Order Modeling and Fast Simulation of Transient Vapor Compression Cycles - Jiacheng Ma, Ray W. Herrick Laboratories, Purdue University

Application of Data-Driven Models for Positive Displacement Compressor Mapping - Davide Ziviani, Purdue University

Kansas City 2019 Seminar 19 - What's Loss Got To Do With it.

Experimental Setup and Analysis of Indicated Losses in Scroll Compressors - Krill Ignatiev, Emerson Commercial and Residential Solutions

Leveraging Loss Analysis to Explore Novel Attributes and Critical Features for Maximum Efficiency in Spool Compressors - Craig R. Bradshaw, Assistant Professor Oklahoma State University

Houston 2018 Seminar 31- Leveraging Compressor Methods of Test for Research and Development

Lubricant and Other Studies for Optimized Compressor Reliability and Performance
Joe Karnaz, Technical Director, Shrieve Chemical Products, Houston TX 

Measurements of a refrigerant vapor injected scroll compressor using a calorimeter
Davide Ziviani, Ph.D., Purdue University, West Lafayette, IN

Development of a light-commercial hot-gas bypass load stand for accelerated compressor development
Craig Bradshaw, Ph.D., Assistant Professor
Drew Schmidt, Graduate Research Assistant
Oklahoma State University

Chicago 2018 Seminar 8 -  Impact of Regulatory and Market Trends on Compressor and System Design

HVAC Regulatory and Market Trends
Brian Smith, Johnson Controls Advanced Development and Engineering Development Center, York, PA

Compressor and System Design Integration
William Dietrich, Member, Daikin Applied, Staunton, VA

Compressor Modulation
Alberto Scala, Trane-Ingersoll Rand, La Crosse, WI

Impact on Refrigerants on Compressor Design
Jacob Groshek, Emerson Commercial & Residential Solutions, Sidney, OH

St. Louis 2016 Seminar 13 - Advancements in Compressor Design, Testing and Performance Modeling for New Efficiency Standards and Alternate Refrigerants

Analysis of the Performance Rating Standards of Positive Displacement Refrigerant Compressors
Joe Sanchez, Bitzer US, Inc., Flowery Branch, GA

Representation of a Positive Displacement Compressor Map with Vapor Injection
Gordon Powell, Ingersoll Rand, La Crosse, WI
A Study of Methods to Represent Compressor Performance Data over an Operating Envelope Based on a Finite Set of Test Data
Vikrant Aute, Ph.D., University of Maryland, College Park, MD

Sizing Low and High Compression Stages of Reciprocating Compressor for Optimum Vapor Injection Performance in Economized Cycle
Alex Lifson, P.E., Carrier Corporation, Syracuse, NY

Orlando 2016 Seminar 65 - Compression Challenges for Low-GWP Refrigerants

Design Improvements of the Spool Compressor Using Comprehensive Modeling Techniques
Craig Bradshaw, Ph.D., Torad Engineering, Cumming, GA

Design Improvements of the Spool Compressor for Various Working Fluids Using Comprehensive Modeling Techniques
Margaret Mathison, Ph.D., Marquette University, Milwaukee, WI

Modeling of an Oil-Free Carbon Dioxide Compressor Using Sanderson-Rocker Arm Motion (S-RAM) Mechanism
Eckhard Groll, Dr.Ing., Purdue University, West Lafayette, IN

Chicago 2015 Seminar 51 - Energy Efficiency of Novel and Conventional Compressors using Low-GWP Refrigerants

Thermodynamic Models for Predicting Compressor Performance with Low-GWP Refrigerants
Margaret M. Mathison, PhD, Marquette University, Milwaukee, WI

A Bayesian Method to Predict Performance of Compressors Using Novel Lower-GWP Refrigerants Based on Test Data for Existing Refrigerants
Vikrant Aute, PhD, University of Maryland, College Park, MD

Performance of Novel Compression Concepts for Heat Pumping, Air Conditioning and Refrigeration Applications
Eckhard Groll, PhD, Purdue University, West Lafayette, IN

  Seminar 49 - Lubricants and Issues for Alternative Refrigerants

Challenges in Lubricating Compressors for Transcritical Refrigeration Systems
Dr. Dan Manole, Member, Tecumseh Products Company, Tecumseh, MI

Estimation of Refrigerant-Oil Mixture Viscosities for Alternative Refrigerants Using Solubility Data
Chris Seeton, Associate Member, University of Illinois at Urbana-Champaign, Champaign, IL

Behavior of Lubricants Within Systems
Richard C. Cavestri, Ph.D., Member, Imagination Resources, Inc., Dublin, OH

Viscosity Reduction Carbon Dioxide with Selected Fluids
Richard C. Cavestri, Ph.D., Member, Imagination Resources, Inc., Dublin, OH

Comparison of Oil Circulation in a Refrigeration System Using HFC/HC Blends
Robert W. Yost, Member, National Refrigerants, Inc., Bridgeton, NJ

Orlando 2005 Seminar 27 - Commercial and Residential Refrigeration Applications 
with Hermetic Natural Refrigerant Compressors

Assessment on the Potential of Carbon Dioxide as Refrigerant Fluid in Commercial Refrigeration Appliances
Ricardo A. Maciel, Member, Empressa Brasileira de Compressores, Joinville - SC, Brazil

Low Capacity CO2 Systems
Jürgen Süss, Ph.D., Fellow; Life Member, Danfoss A/S, Nordborg, Denmark

Introduction of CO2 Rolling Piston Type 2 Stage Compressor for Heat Pump Water Heater Application
Daiki Shiomi, Associate Member, Sanyo Electric, Bensenville, IL

Hydrocarbons in Light Commercial Refrigeration Applications
Marino Bassi, Member, Empressa Brasilieira de Compressores, Joinville - SC, Brazil

Deck Refrigeration System Using Propane as Refrigerant in a Bottle Cooler
Olivier Bel, Ph.D., Tecumseh Europe, La Verpilliere, France

Chicago 2003  

A Critical Assessment of Synthetic Lubricant Technologies for Alternative Refrigerants
Dr. S.J. Randles, Dr. S.J. McTavish, Dr. T.W. Dekleva

High Performance Polyalkylene Glycol Lubricants for CO2 Based Air-conditioning / Refrigeration Systems
Dr. Liz Dixon

Modulation Techniques for Compressors - Part II
Herman Renz, Bitzer Kuehlmaschinenbau

Solubility, Miscibility, and Liquid Viscosity of Lubricants with CO2 and Propane
Chris Seeton