February Meeting, Monday, January 8, 2024, 4:30-7PM
Register Early – HERE! Registration closes one week before the meeting. (if you register for IN-PERSON, and do not show the chapter will request a $25 donation)
NO SHOWS – If you sign up and are unable to attend, please cancel your registration on EventBrite 1 week before.
If something comes up last minute, please send us an email. The chapter is charged for the expected number of attendees. If you sign up and do not attend, the chapter is still paying for your seat! We will request a $25 donation for no-shows.
SESSION 1 : 5:00-6:00 PM – CO2 Component Overview
SESSION 2: 6:00-7:00 PM – Methods of Temperature Control at the Evaporator
WHERE Basso at the Cheshire – 7036 Clayton Ave, St. Louis, MO 63117
FEE $0 for ASHRAE St. Louis Members and full-time students; $25 for Non-members
SPEAKER Jim Jansen, Sr. Applications Engineer, Sporlan Division – Parker Hannifin Corp.
Bio
Jim Jansen has worked at Sporlan for over 30 years and has held various positions in product management, application engineering, customer service and sales. He even served as their college recruiter in the distant past. Currently, Jim is the cohost for the ChillSkills TechTalk Supermarket Series of Webinars and is a primary facilitator of in-person and virtual training sessions.
Prior to his service at Sporlan, Jim sold heat transfer equipment for HVAC and industrial process applications while at Midwest Machinery, and prior to that, worked as a field engineer in both the oil & gas and telecommunications industries. As a young engineering graduate, he was a consulting engineer where he designed HVAC systems for the electrical utility and defense industries. Before his time at the university, Jim serviced and installed residential and light commercial air conditioning and refrigeration equipment while working in the family owned Carrier dealership.
Jim graduated from the University of Missouri – Rolla, now Missouri S&T, with a degree in mechanical engineering, he is a registered professional engineer in Missouri, and a past president of the St. Louis Chapter of ASHRAE.
Session 1: CO2 Component Overview with an Introduction to Electronic Controls for Refrigerated Cases
This session will introduce the concept of refrigeration with an overview of CO2 systems. It will draw parallels between traditional multiplex rack systems, commonly used for over 30 years, with CO2 systems that are becoming more prevalent in the industry. The course will also review CO2 system components including the Gas Cooler/Flash Gas Bypass Valves, Electric Expansion Valves (both step motor and pulse width designs), solenoid valves, ball valves and more. We will also introduce the electronic control as it performs as an integral part of the system to control evaporator temperature with the ability to remotely monitor and troubleshoot system conditions. This type of control is enjoying wide-spread use in many supermarket installations including CO2 charged systems.
Session 2: Methods of Temperature Control at the Evaporator in the Vapor-Compression Refrigeration Cycle
Temperature control at the evaporator in a vapor-compression refrigeration cycle can be as simple as using a liquid line solenoid valve and a thermostat. On the other extreme, it can include electronic controls and electrically actuated valves and offer more options to the supermarket facilities manager. Refrigeration Systems have become more sophisticated over the years with the use of EEVs, EEPRs and the appropriate electronic controllers. The controllers can be stand alone or integrated into the building’s Energy Management System. Generally, the controllers and many system parameters can be monitored remotely. In this presentation, we will discuss various methods of temperature control including the simple solenoid valve approach and the electronically controlled versions. These systems can manage temperature and pressure and can be designed to control lights, defrost, fans and anti-sweat heaters. Some big supermarket retailers are deploying more of these methods and these retailers are encouraging pre-qualification of their service technicians regarding these system controllers.
CONTINUING EDUCATION
2 PDH
