Industrial Refrigeration Workshop

A Virtual Course Offering, April 15-19, and April 22-26, 2024

About the workshop: This workshop is a virtual offering of the long-running course that focuses on industrial refrigeration as practiced in food freezing, refrigeration, and other low-temperature applications. An experienced course faculty will lead participant through a systematic examination of the technical background, practice, and latest developments in low-temperature refrigeration. Started in 1982, this will be the 57th offering of the workshop. 

All materials will be made available via the IIAR Learning Management System platform. Details on accessing these resources will be emailed directly to each participant after registration.

This program will be delivered live online through the IIAR Learning Management System during the dates and times noted below. Each participant will be expected to interact in real-time with instructors and other participants. Each student is required to have access to a digital resource that allows internet access and audiovisual communication. Participants will be able to ask questions directly to the course faculty in real time. More information regarding online etiquette and IT requirements will be included in supplemental materials emailed to each participant after registration.

Target Audience: Engineers and supervisors employed by equipment manufacturers, design firms, refrigerated warehouser’s, food processors, contractors, and chemical firms. The course is intended for designers and builders of new or enlarged plants, supervisors of plant operations, engineers for manufacturers who will learn how their components fit into systems, engineers, and managers either new to the industrial refrigeration field or veteran engineers and managers seeking a refresher. The workshop is appropriate for anyone making design and/or operation decisions for a plant or facility.

Objectives: Our objective is to provide participants with much of the knowledge that they would obtain through industry experience, sometimes through the agony of costly mistakes. We also hope that participants will gain a thorough technical grounding in topics crucial to industrial refrigeration; benefit from the experiences of a group of longtime industry professional; and learn about the latest research and development relevant to industrial refrigeration.

Topics to be covered: Refrigerant properties, single-, two-stage, and cascade refrigeration cycles, load calculations, construction of refrigerated buildings, liquid recirculation systems, reciprocating and screw compressors, performance and selection of evaporator coils, condensers, energy conservation, vessel sizing, liquid pumps, pipe sizing, safety, and control of both halocarbon and ammonia systems.

A thread that will extend throughout the two-week course will be the design of an ammonia refrigeration system serving a food processing plant that incorporates selected low-charge technology. Refrigeration equipment and systems used in this hypothetical facility are typical of a wide variety of applications.

Required Textbooks: All participants will be required to have access to the Industrial Refrigeration Handbook by Wilbert F. Stoecker, available at the sites below and others:

CEUs are availableParticipants may receive a Certificate of Participation reporting 36 contact hours, which will provide documentation for engineering (or other) Professional Development Hour (PDH) or Continuing Education Unit (CEU) requirements.


Workshop sponsor: The workshop is sponsored by the International Institute of Ammonia Refrigeration (IIAR), an association of manufacturers, designers, contractors and end users of industrial refrigeration equipment and systems.
Workshop leader: The director of our workshop is Professor Donald L. Fenton of Kansas State University in Manhattan, KS. For answers to questions about the program content, please contact Don at (785) 341-8375 or [email protected].
Internet-based Workshop platform: All sessions will take place as a synchronous online education program administered by the IIAR Staff at 
Workshop staff 
Director and Instructor: Don Fenton, Kansas State University (Manhattan, KS)
Industry Staff
Larry Gilliland, Subzero Constructors, (Rancho Santa Margarita, CA)
Bruce Nelson, Bruce V. Nelson Engineering (Colville, WA)
Mike Reiner, GEA Refrigeration North America, Inc. (York, PA)
Laura Marshall, Baltimore Air Coil Co. (Jessup, MD)
Paul Spencer, M&M Carnot (Federalsburg, MD)

Schedule: The workshop begins Monday, April 15, 12:00 PM-5:00 PM Eastern (U.S.) time, through Friday, April 19. We’ll then reconvene on Monday, April 22, 12:00 PM-5:00 PM, through Thursday, April 25. Short evening study assignments will be typical.

Of special interest is the optional "Quick-Start" pre-recorded presentation that is recommended as a technical introduction or a refresher session covering refrigeration fundamentals.

Monday, April 15, 12:00 PM-5:00 PM
Topic: Refrigeration load calculation, food refrigeration, design project, refrigerated facilities

Tuesday, April 16, 12:00 PM-5:00 PM
Topic: Refrigeration cycle, design project refrigeration loads, facility construction features

Wednesday, April 17, 12:00 PM-5:00 PM
Topic: Evaporator coils, air-coil construction, liquid recirculation, application of air-cooling coils

Thursday, April 18, 12:00 PM-5:00 PM 
Topic: Psychometrics, selection of design project evaporators, coil defrost controls, two-stage, and cascade refrigeration

Friday, April 19, 12:00 PM-5:00 PM 
Topic: Refrigerant line pressure drop, liquid recirculation systems, vessel design, recommended practices 

Monday, April 22, 12:00 PM-5:00 PM 
Topic: Piping, vessel, and pump selection for project, energy conservation, safety

Tuesday, April 23, 12:00 PM-5:00 PM
Topic: Reciprocating compressors, performance of condensers, operation and construction of condensers 

Wednesday, April 24, 12:00 PM-5:00 PM
Topic: Screw compressors, application of screw compressors, application of evaporative condensers 

Thursday, April 25, 12:00 PM-5:00 PM
Topic: Refrigerant choices, selection of compressors for design project, selection of condensers for design project

Workshop cost: The cost of the workshop is $1,595 for IIAR Members and $1,995 for non-IIAR members. Discounts apply to more than three people from the same organization; contact IIAR for pricing ([email protected]). 
There are three ways to register: 
1. Register ONLINE by going to and click on “Registration.”
2. CALL IIAR directly at +1 (703) 312-4200
3. Send an EMAIL to IIAR at [email protected]
In order to encourage so that personal contact between the participants and staff, registration is limited. Early registration is encouraged. Registration will be on a first-come-first-served basis. Payment must be made to reserve space. 
Refund/Cancellation Policy: If you must cancel your registration, please do so as soon as possible. The cancellation policy is: Full refund if canceled by March 15, 2024; $200 cancellation charge if canceled between March 16 and April 1, 2024; and no refunds offered for cancellations after April 1, 2024. A substitute attendee may replace the original registrant with a written request.