Centrifugal Machines
ASHRAE Technical Committee 8.2

The ASHRAE Handbook is published in a series of four volumes, one of which is revised each year, ensuring that no volume is older than four years.

TC 8.2, along with TC 8.1, is responsible for the following handbook chapters:

HVAC Systems and Equipment: Compressors
A compressor is one of the four essential components of the basic vapor compression refrigeration system; the others are the condenser, evaporator, and expansion device. The compressor circulates refrigerant through the system and increases refrigerant vapor pressure to create the pressure differential between the condenser and evaporator. This chapter describes the design features of several categories of commercially available refrigerant compressors.

HVAC Systems and Equipment: Liquid Chilling
Liquid-chilling systems cool water, brine, or other secondary coolant for air conditioning or refrigeration. The system may be either factory-assembled and wired or shipped in sections for erection in the field. The most frequent application is water chilling for air conditioning, although brine cooling for low-temperature refrigeration and chilling fluids in industrial processes are also common. The basic components of a vapor-compression, liquid-chilling system include a compressor, liquid cooler (evaporator), con-denser, compressor drive, liquid-refrigerant expansion or flow-control device, and control center; it may also include a receiver, economizer, expansion turbine, and/or subcooler. In addition, auxiliary components may be used, such as a lubricant cooler, lubricant separator, lubricant-return device, purge unit, lubricant pump, refrigerant transfer unit, refrigerant vents, and/or additional control valves.

The ASHRAE HVAC SYSTEMS AND EQUIPMENT HANDBOOK may be purchased from the on-line bookstore by clicking the highlighted text.

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NOTE:  Program submission-related deadlines for the 2020 Orlando meeting are as follows:

Monday, June 17, 2019: Website Opens for Seminar, Workshop, Forum, Debate, and Panel Proposals
Monday, July 8, 2019: Final Conference Papers Due - Submitted for Review (Includes Bio, Learning Objectives and Methods of Assessment); Request for Conference Paper Sessions Due
Friday, July 26, 2019: Conference Paper Accept/Revise/Reject Notifications
Friday, August 2, 2019: Seminar, Workshop, Forum, Debate, and Panel Proposals Due
Friday, August 9, 2019: Revised Conference Papers/Final Technical Papers Due
Friday, August 26, 2019: Conference and Technical Paper Final Accept/Reject Notifications
Friday, October 4, 2019: Seminar, Workshop, Forum, Debate, and Panel Accept/Reject Notifications

Technical committees develop and sponsor technical sessions at the winter and annual conferences. Information about their future technical program is discussed at each TC meeting and at the TC’s Program Subcommittee meeting

ASHRAE publishes papers and transactions from presentations at its conference events. In addition, ASHRAE records most of the seminar sessions from its conferences on DVD. These DVDs are ideal for use at chapter meetings, in university courses, or company lunch and learns. Products available from the most recent conference may be found here.

TC 8.2 sponsored the following technical sessions at the Atlanta 2019 meeting:

SEMINAR 21 (INTERMEDIATE)
Uncertainties in Compressor Performance and Field Performance of Liquid-Chilling Systems

Chair: Justin Prosser, P.E., Member, AHRI, Arlington, VA

Summary:  Two major drivers influence the HVACR industry today: climate change and minimum efficiency regulations.  As these sometimes complementing items shape the future of HVACR products, it is important to consider the reality of performance uncertainty in these products, specifically that of compressors (components) and liquid chillers (systems) when installed in the field.  This seminar focuses on the test measurement uncertainty of compressor performance and field performance of liquid chilling systems and suggests possible solutions to the challenges these uncertainties cause for both HVACR manufacturers and users.

1. Uncertainties in Compressor Performance
    Justin Prosser, P.E., Member, AHRI, Arlington, VA
2. An Introduction to Field Testing of Liquid Chillers and ASHRAE Standard 184
    Ian Spanswick, Member, O2RC Solutions LLC, York, PA

TC 8.2 sponsored the following technical sessions at the Houston 2018 Summer meeting:

SEMINAR 69 (BASIC)
Fundamentals of Centrifugal Chillers

Chair: Meagan Gibbs, Henderson Engineers, Lenexa, KS

1. Centrifugal Chiller Basics
    Frederick Betz, Life Member, PEDCO E & A Services, LLC, Cinncinati, OH
2. Operation and Efficiencies of Compressor, Evaporator and Condenser
    Lindsey King, Associate Member, Johnson Controls, New Freedom, PA
3. Compressors, Motors and Starters
    Brandon Moss, Carrier Corporation, Charlotte, NC

Technical Committees are responsible for identifying research topics, proposing research projects, selecting bidders, and monitoring research projects funded by ASHRAE. Information about their specific research program is discussed at each TC meeting and at the TC’s Research Subcommittee meeting.

 ASHRAE writes standards for the purpose of establishing consensus for: 1) methods of test for use in commerce and 2) performance criteria for use as facilitators with which to guide the industry. ASHRAE publishes the following three types of voluntary consensus standards: Method of Measurement or Test (MOT), Standard Design and Standard Practice. ASHRAE does not write rating standards unless a suitable rating standard will not otherwise be available. ASHRAE is accredited by the American National Standards Institute (ANSI) and follows ANSI's requirements for due process and standards development. Standards may be purchased at the ASHRAE Bookstore.

TC 8.2 is cognizant for the following standards:
Std. 30: Method of Testing Liquid Chilling Packages
SPC -184P: Proposed standard - Method of Test for Field Testing of Liquid-Chilling Systems

TC 8.2 is co-cognizant for the following guideline:
GDL-22: Instrumentation for Monitoring Central Chilled Plant Efficiency

TC 8.2 participates in the multidisciplinary task group, MTG.LowGWP.

Lower Global Warming Potential Alternative Refrigerants
MTG.LowGWP is established to coordinate TC/TG/TRG technical activities to help transition the HVAC&R industry to sustainable lower Global Warming Potential (GWP) alternative refrigerants. The MTG will further request participation from US EPA and AHRI. The MTG responsibilities include suggestions for research, development and presentation of technical programs of all types on alternative lower GWP refrigerants, suggestions for Life Cycle Climate Performance (LCCP) systems evaluation for different applications, development of lower GWP solutions for different applications, and a special publication detailing aspects of LCCP applied to the HVAC&R fields. 

ASHRAE Technical FAQs are provided as a service to ASHRAE members, users of ASHRAE publications, and the general public. While every effort has been made to ensure their accuracy and reliability, they are advisory and provided for informational purposes only, and in many cases represent only one person’s view. They are not intended and should not be relied on as an official statement of ASHRAE. Technical questions not addressed may be submitted to the ASHRAE Technical Services department at tse@ashrae.net.