Introduction to Ammonia Refrigeration Systems

Lodging

DoubleTree by Hilton Madison Downtown

525 West Johnson Street
Madison, WI 53703

Room: rates start at $239

Reserve by: September 8, 2026

Accommodations include: Enjoy complimentary business center, WiFi and Local/Airport Shuttle. Each room has a refrigerator, microwave, 42-inch HDTV, and executive desk. Parking available $15/night.

Fluno Center

601 University Avenue
Madison, WI 53706

Accommodations include: Your stay includes hot breakfast buffet, fitness center, business center, convenient on-site parking. Guest rooms are complete with Keurig coffee maker, refrigerator, complimentary high-speed Internet, and 40-inch, flat screen, high-def TVs.

Madison Concourse Hotel and Governor's Club

One West Dayton Street
Madison, WI 53703

Room: rates start at $160

Accommodations include: Complimentary WiFi, Local/Airport Shuttle, Pool, and Fitness Center.

Instructors
Marc Claas
Researcher
Marc Claas is an Associate Researcher with the Industrial Refrigeration Consortium, specializing in industrial refrigeration since 2009. He focuses on system maintenance, safe operation, troubleshooting, and regulatory compliance, with a growing interest in emerging cooling technologies. Marc has led online operator training programs and brings extensive field experience in Process Safety Management (PSM), including audits and Process Hazard Analyses (PHAs). He also investigates energy efficiency and operational improvements in refrigeration systems. Marc holds a B.S. in Mechanical Engineering from UW-Platteville and an M.S. in Mechanical Engineering with a focus on Thermal Sciences from UW-Madison. He is an active member of the International Institute of Ammonia Refrigeration.
Todd Jekel
Assistant Director
Todd Jekel, PhD, PE is the Assistant Director of the Industrial Refrigeration Consortium (IRC) at the University of Wisconsin–Madison, where he leads applied research and technical outreach in industrial refrigeration. His work focuses on system and component modeling, refrigeration load and energy calculations, accumulator design, and safety relief vent systems. Dr. Jekel has contributed to the development and instruction of several web-based and in-person courses for refrigeration professionals, covering topics such as ammonia refrigeration, process safety, and energy efficiency. He holds degrees from Calvin College and the University of Wisconsin–Madison. In addition to his academic and research roles, he is an active member of ASHRAE and the International Institute of Ammonia Refrigeration (IIAR), serving on multiple technical committees. Dr. Jekel is recognized for his expertise in vessel design, oil separation, and dehumidification strategies for cold storage facilities.
Douglas Reindl
PROFESSOR
Douglas Reindl, PhD, PE is a professor in the Department of Mechanical Engineering and a Program Director at the Office of Interdisciplinary Professional Programs at the University of Wisconsin–Madison. He brings extensive expertise in mechanical systems, with a particular focus on industrial ammonia refrigeration. As the founding director of the Industrial Refrigeration Consortium, Dr. Reindl is dedicated to advancing the safety, efficiency, and reliability of refrigeration infrastructure. He holds a BS in Mechanical Engineering Technology from the Milwaukee School of Engineering, and both MS and PhD degrees in Mechanical Engineering from UW–Madison. A registered professional engineer in Wisconsin, Dr. Reindl is widely recognized for his leadership in refrigeration education and applied research.
Program Director
Douglas Reindl

Total Credits:

CEU 2,

PDH 20,

Applies to this Certificate:

Course Administration

If you are planning to attend an Interdisciplinary Professional Programs course, payment is required at the time of registration. Below are the payment options:

Pay by Credit Card

Enroll online and pay by credit card.

Search for the course on the website and then click on the Enroll Now button from the course webpage.
Enter all necessary course attendee information and payment information on the course enrollment page.
You will receive an email to confirm successful enrollment and payment.

Pay by Check

Mail in a completed registration form and check payable to UW Madison.

Fill out a registration form (found either in the back of the course brochure you received in the mail or here).
Prepare a check, made payable to UW Madison.
Mail the registration form and check to: CERC Registrations 21 N Park St, Ste 7101 Madison, WI 53715
You will receive either a mailed document or an email to confirm successful enrollment and payment.

Pay by Purchase Order

Request Purchase Order information from registration@cerc.wisc.edu
- If a fee quote is needed, contact custserv@interpro.wisc.edu first
You will receive an invoice from UW–Madison Business Services for payment, usually within 3–5 business days

Military

If using SF-182 form, please call our registration number at 608-262-2451 or email registration@cerc.wisc.edu for details and instructions.

Event Cancellation

We reserve the right to cancel a course due to insufficient enrollment or unforeseen events. If we cancel a course, participants will be notified via email or phone and will be given the option for a full refund or to transfer their registration and any fees paid to another course. We are not responsible for non-refundable plane tickets, hotel reservations, and other travel related expenses. For enrollee Course Cancellation, refer to notes on course page.

Create a custom learning experience

We can deliver this course as an on-site learning experience tailored to your organization’s specific training needs.

"Now I feel I can safely and comfortably control our plant."
"This course provided and easy, logical explanation of refrigeration basics."
"This will help me immediately in my job."
"Exceeded expectations. Direct application to my current responsibilities and gave me plenty to look at and hopefully improve when I return. I'm looking forward to future courses."

Course Details: RA00369-E030

Refrigeration Systems Overview

Refrigeration technology alternatives
Refrigerants and refrigerant selection criteria
Introduction to system types: direct expansion, flooded, and overfeed

Overview of Refrigerant Properties

Fundamental properties: pressure, volume, and temperature
Derived properties: enthalpy, internal energy, and transport
Refrigerant phases and behavior during phase change
Latent and sensible energy changes
Diagrams: pressure vs. enthalpy
Flash gas concepts

Refrigerant Property Workshop

Safety in Ammonia Refrigeration

Safety and health issues associated with refrigerants
Flammability considerations
Prevention of incidents and accidents

Overview of Process Safety Management and Risk Management Programs

Applicability
Key elements of OSHA''s Process Safety Management program
EPA''s Risk Management Plan rule

Machinery Room Safety Practices

Equipment
Key safety systems: ammonia detection, ventilation, emergency controls, and eye wash and shower stations
Related standards

Refrigeration System Components: Compressors

Technology alternatives
Configuration: open drive vs. semi-hermetic or hermetic
Theory of operation screw (single/twin) and reciprocating
Capacity control/unloading
Volume ratio concepts

Refrigeration Systems Workshop

How to identify cycle state points
How to complete cycle layouts

Refrigeration System Components: Condensers

Types of heat rejection equipment
Principles of operation
Operational considerations

Refrigeration System Components: Valves

Stop valves
Check valves
Regulators
Expansion valves: thermostatic, electronics, hand, and floats
Safety relief

Refrigeration Cycle Review

Refrigeration System Components: Evaporators

Feed configurations: DX, flooded, and liquid overfeed
Air units: ceiling-hung, penthouse/high temperature, and low temperature
Chillers: plate-and-frame, and shell-and-tube

Refrigeration System Components: Vessels and Pumps

High-side vessels: high-pressure receiver, thermosiphon pilot, and controlled-pressure receiver
Low-side vessels: suction traps and transfer stations, recirculators, and surge drums
Transfer systems
Liquid refrigerant pumps

Open Discussion

Course Location

Pyle Center

702 Langdon Street
Madison, WI 53706

Lodging

Madison Concourse Hotel and Governor's Club

One West Dayton Street
Madison, WI 53703

Room: rates start at $160

Accommodations include: Complimentary WiFi, Local/Airport Shuttle, Pool, and Fitness Center.

DoubleTree by Hilton Madison Downtown

525 West Johnson Street
Madison, WI 53703

Accommodations include: Enjoy complimentary business center, WiFi and Local/Airport Shuttle. Each room has a refrigerator, microwave, 42-inch HDTV, and executive desk. Parking available $15/night.

Fluno Center

601 University Avenue
Madison, WI 53706

Accommodations include: Your stay includes hot breakfast buffet, fitness center, business center, convenient on-site parking. Guest rooms are complete with Keurig coffee maker, refrigerator, complimentary high-speed Internet, and 40-inch, flat screen, high-def TVs.

This in-person course uses the Canvas learning management system to provide access to instructional materials, participation certificates, and course evaluations. A UW NetID is required to log in to Canvas.

Your registration confirmation email will include step-by-step instructions for setting up your NetID and accessing the Canvas course site. Please check your spam folder if you do not see your confirmation or UW communication emails from the "@wisc.edu" address.

This course is part of the Process Safety Management Professional Certificate. Increase your knowledge and effectiveness at managing PSM/RMP programs for your ammonia refrigerated facility, while earning a recognized credential. The course can be taken individually.

Instructors
Marc Claas
Researcher
Marc Claas is an Associate Researcher with the Industrial Refrigeration Consortium, specializing in industrial refrigeration since 2009. He focuses on system maintenance, safe operation, troubleshooting, and regulatory compliance, with a growing interest in emerging cooling technologies. Marc has led online operator training programs and brings extensive field experience in Process Safety Management (PSM), including audits and Process Hazard Analyses (PHAs). He also investigates energy efficiency and operational improvements in refrigeration systems. Marc holds a B.S. in Mechanical Engineering from UW-Platteville and an M.S. in Mechanical Engineering with a focus on Thermal Sciences from UW-Madison. He is an active member of the International Institute of Ammonia Refrigeration.
Douglas Reindl
PROFESSOR
Douglas Reindl, PhD, PE is a professor in the Department of Mechanical Engineering and a Program Director at the Office of Interdisciplinary Professional Programs at the University of Wisconsin–Madison. He brings extensive expertise in mechanical systems, with a particular focus on industrial ammonia refrigeration. As the founding director of the Industrial Refrigeration Consortium, Dr. Reindl is dedicated to advancing the safety, efficiency, and reliability of refrigeration infrastructure. He holds a BS in Mechanical Engineering Technology from the Milwaukee School of Engineering, and both MS and PhD degrees in Mechanical Engineering from UW–Madison. A registered professional engineer in Wisconsin, Dr. Reindl is widely recognized for his leadership in refrigeration education and applied research.
Todd Jekel
Assistant Director
Todd Jekel, PhD, PE is the Assistant Director of the Industrial Refrigeration Consortium (IRC) at the University of Wisconsin–Madison, where he leads applied research and technical outreach in industrial refrigeration. His work focuses on system and component modeling, refrigeration load and energy calculations, accumulator design, and safety relief vent systems. Dr. Jekel has contributed to the development and instruction of several web-based and in-person courses for refrigeration professionals, covering topics such as ammonia refrigeration, process safety, and energy efficiency. He holds degrees from Calvin College and the University of Wisconsin–Madison. In addition to his academic and research roles, he is an active member of ASHRAE and the International Institute of Ammonia Refrigeration (IIAR), serving on multiple technical committees. Dr. Jekel is recognized for his expertise in vessel design, oil separation, and dehumidification strategies for cold storage facilities.
Program Director
Douglas Reindl

Total Credits:

CEU 2,

PDH 20,

Applies to this Certificate:

Course Administration

If you are planning to attend an Interdisciplinary Professional Programs course, payment is required at the time of registration. Below are the payment options:

Pay by Credit Card

Enroll online and pay by credit card.

Search for the course on the website and then click on the Enroll Now button from the course webpage.
Enter all necessary course attendee information and payment information on the course enrollment page.
You will receive an email to confirm successful enrollment and payment.

Pay by Check

Mail in a completed registration form and check payable to UW Madison.

Fill out a registration form (found either in the back of the course brochure you received in the mail or here).
Prepare a check, made payable to UW Madison.
Mail the registration form and check to: CERC Registrations 21 N Park St, Ste 7101 Madison, WI 53715
You will receive either a mailed document or an email to confirm successful enrollment and payment.

Pay by Purchase Order

Request Purchase Order information from registration@cerc.wisc.edu
- If a fee quote is needed, contact custserv@interpro.wisc.edu first
You will receive an invoice from UW–Madison Business Services for payment, usually within 3–5 business days

Military

If using SF-182 form, please call our registration number at 608-262-2451 or email registration@cerc.wisc.edu for details and instructions.

Event Cancellation

We reserve the right to cancel a course due to insufficient enrollment or unforeseen events. If we cancel a course, participants will be notified via email or phone and will be given the option for a full refund or to transfer their registration and any fees paid to another course. We are not responsible for non-refundable plane tickets, hotel reservations, and other travel related expenses. For enrollee Course Cancellation, refer to notes on course page.

Create a custom learning experience

We can deliver this course as an on-site learning experience tailored to your organization’s specific training needs.

"Now I feel I can safely and comfortably control our plant."
"This course provided and easy, logical explanation of refrigeration basics."
"This will help me immediately in my job."
"Exceeded expectations. Direct application to my current responsibilities and gave me plenty to look at and hopefully improve when I return. I'm looking forward to future courses."

Course Details: RA00369-E035

Refrigeration Systems Overview

Refrigeration technology alternatives
Refrigerants and refrigerant selection criteria
Introduction to system types: direct expansion, flooded, and overfeed

Overview of Refrigerant Properties

Fundamental properties: pressure, volume, and temperature
Derived properties: enthalpy, internal energy, and transport
Refrigerant phases and behavior during phase change
Latent and sensible energy changes
Diagrams: pressure vs. enthalpy
Flash gas concepts

Refrigerant Property Workshop

Safety in Ammonia Refrigeration

Safety and health issues associated with refrigerants
Flammability considerations
Prevention of incidents and accidents

Overview of Process Safety Management and Risk Management Programs

Applicability
Key elements of OSHA''s Process Safety Management program
EPA''s Risk Management Plan rule

Machinery Room Safety Practices

Equipment
Key safety systems: ammonia detection, ventilation, emergency controls, and eye wash and shower stations
Related standards

Refrigeration System Components: Compressors

Technology alternatives
Configuration: open drive vs. semi-hermetic or hermetic
Theory of operation screw (single/twin) and reciprocating
Capacity control/unloading
Volume ratio concepts

Refrigeration Systems Workshop

How to identify cycle state points
How to complete cycle layouts

Refrigeration System Components: Condensers

Types of heat rejection equipment
Principles of operation
Operational considerations

Refrigeration System Components: Valves

Stop valves
Check valves
Regulators
Expansion valves: thermostatic, electronics, hand, and floats
Safety relief

Refrigeration Cycle Review

Refrigeration System Components: Evaporators

Feed configurations: DX, flooded, and liquid overfeed
Air units: ceiling-hung, penthouse/high temperature, and low temperature
Chillers: plate-and-frame, and shell-and-tube

Refrigeration System Components: Vessels and Pumps

High-side vessels: high-pressure receiver, thermosiphon pilot, and controlled-pressure receiver
Low-side vessels: suction traps and transfer stations, recirculators, and surge drums
Transfer systems
Liquid refrigerant pumps

Open Discussion

Course Location

Pyle Center

702 Langdon Street
Madison, WI 53706

Lodging

Madison Concourse Hotel and Governor's Club

One West Dayton Street
Madison, WI 53703

Room: rates start at $160

Accommodations include: Complimentary WiFi, Local/Airport Shuttle, Pool, and Fitness Center.

DoubleTree by Hilton Madison Downtown

525 West Johnson Street
Madison, WI 53703

Accommodations include: Enjoy complimentary business center, WiFi and Local/Airport Shuttle. Each room has a refrigerator, microwave, 42-inch HDTV, and executive desk. Parking available $15/night.

Fluno Center

601 University Avenue
Madison, WI 53706

Accommodations include: Your stay includes hot breakfast buffet, fitness center, business center, convenient on-site parking. Guest rooms are complete with Keurig coffee maker, refrigerator, complimentary high-speed Internet, and 40-inch, flat screen, high-def TVs.

This in-person course uses the Canvas learning management system to provide access to instructional materials, participation certificates, and course evaluations. A UW NetID is required to log in to Canvas.

Your registration confirmation email will include step-by-step instructions for setting up your NetID and accessing the Canvas course site. Please check your spam folder if you do not see your confirmation or UW communication emails from the "@wisc.edu" address.

This course is part of the Process Safety Management Professional Certificate. Increase your knowledge and effectiveness at managing PSM/RMP programs for your ammonia refrigerated facility, while earning a recognized credential. The course can be taken individually.

Instructors
Todd Jekel
Assistant Director
Todd Jekel, PhD, PE is the Assistant Director of the Industrial Refrigeration Consortium (IRC) at the University of Wisconsin–Madison, where he leads applied research and technical outreach in industrial refrigeration. His work focuses on system and component modeling, refrigeration load and energy calculations, accumulator design, and safety relief vent systems. Dr. Jekel has contributed to the development and instruction of several web-based and in-person courses for refrigeration professionals, covering topics such as ammonia refrigeration, process safety, and energy efficiency. He holds degrees from Calvin College and the University of Wisconsin–Madison. In addition to his academic and research roles, he is an active member of ASHRAE and the International Institute of Ammonia Refrigeration (IIAR), serving on multiple technical committees. Dr. Jekel is recognized for his expertise in vessel design, oil separation, and dehumidification strategies for cold storage facilities.
Douglas Reindl
PROFESSOR
Douglas Reindl, PhD, PE is a professor in the Department of Mechanical Engineering and a Program Director at the Office of Interdisciplinary Professional Programs at the University of Wisconsin–Madison. He brings extensive expertise in mechanical systems, with a particular focus on industrial ammonia refrigeration. As the founding director of the Industrial Refrigeration Consortium, Dr. Reindl is dedicated to advancing the safety, efficiency, and reliability of refrigeration infrastructure. He holds a BS in Mechanical Engineering Technology from the Milwaukee School of Engineering, and both MS and PhD degrees in Mechanical Engineering from UW–Madison. A registered professional engineer in Wisconsin, Dr. Reindl is widely recognized for his leadership in refrigeration education and applied research.
Marc Claas
Researcher
Marc Claas is an Associate Researcher with the Industrial Refrigeration Consortium, specializing in industrial refrigeration since 2009. He focuses on system maintenance, safe operation, troubleshooting, and regulatory compliance, with a growing interest in emerging cooling technologies. Marc has led online operator training programs and brings extensive field experience in Process Safety Management (PSM), including audits and Process Hazard Analyses (PHAs). He also investigates energy efficiency and operational improvements in refrigeration systems. Marc holds a B.S. in Mechanical Engineering from UW-Platteville and an M.S. in Mechanical Engineering with a focus on Thermal Sciences from UW-Madison. He is an active member of the International Institute of Ammonia Refrigeration.
Program Director
Douglas Reindl

Total Credits:

CEU 2,

PDH 20,

Applies to this Certificate:

Course Administration

If you are planning to attend an Interdisciplinary Professional Programs course, payment is required at the time of registration. Below are the payment options:

Pay by Credit Card

Enroll online and pay by credit card.

Search for the course on the website and then click on the Enroll Now button from the course webpage.
Enter all necessary course attendee information and payment information on the course enrollment page.
You will receive an email to confirm successful enrollment and payment.

Pay by Check

Mail in a completed registration form and check payable to UW Madison.

Fill out a registration form (found either in the back of the course brochure you received in the mail or here).
Prepare a check, made payable to UW Madison.
Mail the registration form and check to: CERC Registrations 21 N Park St, Ste 7101 Madison, WI 53715
You will receive either a mailed document or an email to confirm successful enrollment and payment.

Pay by Purchase Order

Request Purchase Order information from registration@cerc.wisc.edu
- If a fee quote is needed, contact custserv@interpro.wisc.edu first
You will receive an invoice from UW–Madison Business Services for payment, usually within 3–5 business days

Military

If using SF-182 form, please call our registration number at 608-262-2451 or email registration@cerc.wisc.edu for details and instructions.

Event Cancellation

We reserve the right to cancel a course due to insufficient enrollment or unforeseen events. If we cancel a course, participants will be notified via email or phone and will be given the option for a full refund or to transfer their registration and any fees paid to another course. We are not responsible for non-refundable plane tickets, hotel reservations, and other travel related expenses. For enrollee Course Cancellation, refer to notes on course page.

Create a custom learning experience

We can deliver this course as an on-site learning experience tailored to your organization’s specific training needs.

"Now I feel I can safely and comfortably control our plant."
"This course provided and easy, logical explanation of refrigeration basics."
"This will help me immediately in my job."
"Exceeded expectations. Direct application to my current responsibilities and gave me plenty to look at and hopefully improve when I return. I'm looking forward to future courses."

Course Details: RA00369-E038

Refrigeration Systems Overview

Refrigeration technology alternatives
Refrigerants and refrigerant selection criteria
Introduction to system types: direct expansion, flooded, and overfeed

Overview of Refrigerant Properties

Fundamental properties: pressure, volume, and temperature
Derived properties: enthalpy, internal energy, and transport
Refrigerant phases and behavior during phase change
Latent and sensible energy changes
Diagrams: pressure vs. enthalpy
Flash gas concepts

Refrigerant Property Workshop

Safety in Ammonia Refrigeration

Safety and health issues associated with refrigerants
Flammability considerations
Prevention of incidents and accidents

Overview of Process Safety Management and Risk Management Programs

Applicability
Key elements of OSHA''s Process Safety Management program
EPA''s Risk Management Plan rule

Machinery Room Safety Practices

Equipment
Key safety systems: ammonia detection, ventilation, emergency controls, and eye wash and shower stations
Related standards

Refrigeration System Components: Compressors

Technology alternatives
Configuration: open drive vs. semi-hermetic or hermetic
Theory of operation screw (single/twin) and reciprocating
Capacity control/unloading
Volume ratio concepts

Refrigeration Systems Workshop

How to identify cycle state points
How to complete cycle layouts

Refrigeration System Components: Condensers

Types of heat rejection equipment
Principles of operation
Operational considerations

Refrigeration System Components: Valves

Stop valves
Check valves
Regulators
Expansion valves: thermostatic, electronics, hand, and floats
Safety relief

Refrigeration Cycle Review

Refrigeration System Components: Evaporators

Feed configurations: DX, flooded, and liquid overfeed
Air units: ceiling-hung, penthouse/high temperature, and low temperature
Chillers: plate-and-frame, and shell-and-tube

Refrigeration System Components: Vessels and Pumps

High-side vessels: high-pressure receiver, thermosiphon pilot, and controlled-pressure receiver
Low-side vessels: suction traps and transfer stations, recirculators, and surge drums
Transfer systems
Liquid refrigerant pumps

Open Discussion

Course Location

Pyle Center

702 Langdon Street
Madison, WI 53706

Lodging

Madison Concourse Hotel and Governor's Club

One West Dayton Street
Madison, WI 53703

Room: rates start at $160

Accommodations include: Complimentary WiFi, Local/Airport Shuttle, Pool, and Fitness Center.

DoubleTree by Hilton Madison Downtown

525 West Johnson Street
Madison, WI 53703

Accommodations include: Enjoy complimentary business center, WiFi and Local/Airport Shuttle. Each room has a refrigerator, microwave, 42-inch HDTV, and executive desk. Parking available $15/night.

Fluno Center

601 University Avenue
Madison, WI 53706

Accommodations include: Your stay includes hot breakfast buffet, fitness center, business center, convenient on-site parking. Guest rooms are complete with Keurig coffee maker, refrigerator, complimentary high-speed Internet, and 40-inch, flat screen, high-def TVs.

This in-person course uses the Canvas learning management system to provide access to instructional materials, participation certificates, and course evaluations. A UW NetID is required to log in to Canvas.

Your registration confirmation email will include step-by-step instructions for setting up your NetID and accessing the Canvas course site. Please check your spam folder if you do not see your confirmation or UW communication emails from the "@wisc.edu" address.

This course is part of the Process Safety Management Professional Certificate. Increase your knowledge and effectiveness at managing PSM/RMP programs for your ammonia refrigerated facility, while earning a recognized credential. The course can be taken individually.

Instructors
Todd Jekel
Assistant Director
Todd Jekel, PhD, PE is the Assistant Director of the Industrial Refrigeration Consortium (IRC) at the University of Wisconsin–Madison, where he leads applied research and technical outreach in industrial refrigeration. His work focuses on system and component modeling, refrigeration load and energy calculations, accumulator design, and safety relief vent systems. Dr. Jekel has contributed to the development and instruction of several web-based and in-person courses for refrigeration professionals, covering topics such as ammonia refrigeration, process safety, and energy efficiency. He holds degrees from Calvin College and the University of Wisconsin–Madison. In addition to his academic and research roles, he is an active member of ASHRAE and the International Institute of Ammonia Refrigeration (IIAR), serving on multiple technical committees. Dr. Jekel is recognized for his expertise in vessel design, oil separation, and dehumidification strategies for cold storage facilities.
Douglas Reindl
PROFESSOR
Douglas Reindl, PhD, PE is a professor in the Department of Mechanical Engineering and a Program Director at the Office of Interdisciplinary Professional Programs at the University of Wisconsin–Madison. He brings extensive expertise in mechanical systems, with a particular focus on industrial ammonia refrigeration. As the founding director of the Industrial Refrigeration Consortium, Dr. Reindl is dedicated to advancing the safety, efficiency, and reliability of refrigeration infrastructure. He holds a BS in Mechanical Engineering Technology from the Milwaukee School of Engineering, and both MS and PhD degrees in Mechanical Engineering from UW–Madison. A registered professional engineer in Wisconsin, Dr. Reindl is widely recognized for his leadership in refrigeration education and applied research.
Marc Claas
Researcher
Marc Claas is an Associate Researcher with the Industrial Refrigeration Consortium, specializing in industrial refrigeration since 2009. He focuses on system maintenance, safe operation, troubleshooting, and regulatory compliance, with a growing interest in emerging cooling technologies. Marc has led online operator training programs and brings extensive field experience in Process Safety Management (PSM), including audits and Process Hazard Analyses (PHAs). He also investigates energy efficiency and operational improvements in refrigeration systems. Marc holds a B.S. in Mechanical Engineering from UW-Platteville and an M.S. in Mechanical Engineering with a focus on Thermal Sciences from UW-Madison. He is an active member of the International Institute of Ammonia Refrigeration.
Program Director
Douglas Reindl

Total Credits:

CEU 2,

PDH 20,

Applies to this Certificate:

Course Administration

If you are planning to attend an Interdisciplinary Professional Programs course, payment is required at the time of registration. Below are the payment options:

Pay by Credit Card

Enroll online and pay by credit card.

Search for the course on the website and then click on the Enroll Now button from the course webpage.
Enter all necessary course attendee information and payment information on the course enrollment page.
You will receive an email to confirm successful enrollment and payment.

Pay by Check

Mail in a completed registration form and check payable to UW Madison.

Fill out a registration form (found either in the back of the course brochure you received in the mail or here).
Prepare a check, made payable to UW Madison.
Mail the registration form and check to: CERC Registrations 21 N Park St, Ste 7101 Madison, WI 53715
You will receive either a mailed document or an email to confirm successful enrollment and payment.

Pay by Purchase Order

Request Purchase Order information from registration@cerc.wisc.edu
- If a fee quote is needed, contact custserv@interpro.wisc.edu first
You will receive an invoice from UW–Madison Business Services for payment, usually within 3–5 business days

Military

If using SF-182 form, please call our registration number at 608-262-2451 or email registration@cerc.wisc.edu for details and instructions.

Event Cancellation

We reserve the right to cancel a course due to insufficient enrollment or unforeseen events. If we cancel a course, participants will be notified via email or phone and will be given the option for a full refund or to transfer their registration and any fees paid to another course. We are not responsible for non-refundable plane tickets, hotel reservations, and other travel related expenses. For enrollee Course Cancellation, refer to notes on course page.

Create a custom learning experience

We can deliver this course as an on-site learning experience tailored to your organization’s specific training needs.

"Now I feel I can safely and comfortably control our plant."
"This course provided and easy, logical explanation of refrigeration basics."
"This will help me immediately in my job."
"Exceeded expectations. Direct application to my current responsibilities and gave me plenty to look at and hopefully improve when I return. I'm looking forward to future courses."

Course Details: RA00369-E071

Refrigeration Systems Overview

Refrigeration technology alternatives
Refrigerants and refrigerant selection criteria
Introduction to system types: direct expansion, flooded, and overfeed

Overview of Refrigerant Properties

Fundamental properties: pressure, volume, and temperature
Derived properties: enthalpy, internal energy, and transport
Refrigerant phases and behavior during phase change
Latent and sensible energy changes
Diagrams: pressure vs. enthalpy
Flash gas concepts

Refrigerant Property Workshop

Safety in Ammonia Refrigeration

Safety and health issues associated with refrigerants
Flammability considerations
Prevention of incidents and accidents

Overview of Process Safety Management and Risk Management Programs

Applicability
Key elements of OSHA''s Process Safety Management program
EPA''s Risk Management Plan rule

Machinery Room Safety Practices

Equipment
Key safety systems: ammonia detection, ventilation, emergency controls, and eye wash and shower stations
Related standards

Refrigeration System Components: Compressors

Technology alternatives
Configuration: open drive vs. semi-hermetic or hermetic
Theory of operation screw (single/twin) and reciprocating
Capacity control/unloading
Volume ratio concepts

Refrigeration Systems Workshop

How to identify cycle state points
How to complete cycle layouts

Refrigeration System Components: Condensers

Types of heat rejection equipment
Principles of operation
Operational considerations

Refrigeration System Components: Valves

Stop valves
Check valves
Regulators
Expansion valves: thermostatic, electronics, hand, and floats
Safety relief

Refrigeration Cycle Review

Refrigeration System Components: Evaporators

Feed configurations: DX, flooded, and liquid overfeed
Air units: ceiling-hung, penthouse/high temperature, and low temperature
Chillers: plate-and-frame, and shell-and-tube

Refrigeration System Components: Vessels and Pumps

High-side vessels: high-pressure receiver, thermosiphon pilot, and controlled-pressure receiver
Low-side vessels: suction traps and transfer stations, recirculators, and surge drums
Transfer systems
Liquid refrigerant pumps

Open Discussion

Course Location

Pyle Center

702 Langdon Street
Madison, WI 53706

Lodging

Madison Concourse Hotel and Governor's Club

One West Dayton Street
Madison, WI 53703

Room: rates start at $160

Accommodations include: Complimentary WiFi, Local/Airport Shuttle, Pool, and Fitness Center.

DoubleTree by Hilton Madison Downtown

525 West Johnson Street
Madison, WI 53703

Accommodations include: Enjoy complimentary business center, WiFi and Local/Airport Shuttle. Each room has a refrigerator, microwave, 42-inch HDTV, and executive desk. Parking available $15/night.

Fluno Center

601 University Avenue
Madison, WI 53706

Accommodations include: Your stay includes hot breakfast buffet, fitness center, business center, convenient on-site parking. Guest rooms are complete with Keurig coffee maker, refrigerator, complimentary high-speed Internet, and 40-inch, flat screen, high-def TVs.

This in-person course uses the Canvas learning management system to provide access to instructional materials, participation certificates, and course evaluations. A UW NetID is required to log in to Canvas.

Your registration confirmation email will include step-by-step instructions for setting up your NetID and accessing the Canvas course site. Please check your spam folder if you do not see your confirmation or UW communication emails from the "@wisc.edu" address.

This course is part of the Process Safety Management Professional Certificate. Increase your knowledge and effectiveness at managing PSM/RMP programs for your ammonia refrigerated facility, while earning a recognized credential. The course can be taken individually.

Instructors
Todd Jekel
Assistant Director
Todd Jekel, PhD, PE is the Assistant Director of the Industrial Refrigeration Consortium (IRC) at the University of Wisconsin–Madison, where he leads applied research and technical outreach in industrial refrigeration. His work focuses on system and component modeling, refrigeration load and energy calculations, accumulator design, and safety relief vent systems. Dr. Jekel has contributed to the development and instruction of several web-based and in-person courses for refrigeration professionals, covering topics such as ammonia refrigeration, process safety, and energy efficiency. He holds degrees from Calvin College and the University of Wisconsin–Madison. In addition to his academic and research roles, he is an active member of ASHRAE and the International Institute of Ammonia Refrigeration (IIAR), serving on multiple technical committees. Dr. Jekel is recognized for his expertise in vessel design, oil separation, and dehumidification strategies for cold storage facilities.
Douglas Reindl
PROFESSOR
Douglas Reindl, PhD, PE is a professor in the Department of Mechanical Engineering and a Program Director at the Office of Interdisciplinary Professional Programs at the University of Wisconsin–Madison. He brings extensive expertise in mechanical systems, with a particular focus on industrial ammonia refrigeration. As the founding director of the Industrial Refrigeration Consortium, Dr. Reindl is dedicated to advancing the safety, efficiency, and reliability of refrigeration infrastructure. He holds a BS in Mechanical Engineering Technology from the Milwaukee School of Engineering, and both MS and PhD degrees in Mechanical Engineering from UW–Madison. A registered professional engineer in Wisconsin, Dr. Reindl is widely recognized for his leadership in refrigeration education and applied research.
Marc Claas
Researcher
Marc Claas is an Associate Researcher with the Industrial Refrigeration Consortium, specializing in industrial refrigeration since 2009. He focuses on system maintenance, safe operation, troubleshooting, and regulatory compliance, with a growing interest in emerging cooling technologies. Marc has led online operator training programs and brings extensive field experience in Process Safety Management (PSM), including audits and Process Hazard Analyses (PHAs). He also investigates energy efficiency and operational improvements in refrigeration systems. Marc holds a B.S. in Mechanical Engineering from UW-Platteville and an M.S. in Mechanical Engineering with a focus on Thermal Sciences from UW-Madison. He is an active member of the International Institute of Ammonia Refrigeration.
Program Director
Douglas Reindl

Total Credits:

CEU 2,

PDH 20,

Applies to this Certificate: