Chilling with Jens

Chilling with Jens
Discover the world of evaporative refrigeration

Cool Talk: Star-delta starters and three-phase voltage
May 29 • 11 min
In this episode, Jens discusses traditional star-delta starters and shares a few insights into three-phase power supply. He also goes into the very basics of three-phase voltage, showing how it comes into play when the star-delta starter is used in…
Cool Talk: The Operating Envelope
Apr 30 • 17 min
A compressor’s operational flexibility has its limits, which is illustrated by the Operating Envelope. The Operating Envelope indicates the theoretical threshold a compressor can function in without being challenged by the operating conditions. And, right…
Cool Talk: CO₂ refrigeration landscape
Mar 31 • 12 min
In this episode of the Chilling with Jens podcast, our host looks at the overall landscape when it comes to the use of CO2 in refrigeration, air conditioning, and heating from a Danfoss Perspective. He also explores how the business has developed over the…
Cool Talk: The AK-CC55
Feb 27 • 14 min
In this episode of Cool Talk, Jens interviews Senior Product Manager Ejnar Luckmann about the new Danfoss AK-CC55. They discuss several of its intriguing new features, such as its smartphone user interface, improved defrosting, and adaptive liquid…
Chapter 19: The Evaporator and Expansion Valve
Jan 31 • 17 min
After straying away for a bit to focus on “Cool Talk”, Jens gets back on the educational track here in Chapter 19. This episode addresses the “cool” part of the cooling system: the evaporator, the evaporator coil, and the TXV. Jens discusses how they work…
Cool Talk: Glenn Moore’s Winter Blues
Dec 17, 2019 • 11 min
In this special wintery edition of Chilling with Jens, our host dives back into the written works of Glenn Moore. This time around, the focus is on how compressors and condensers operate during the winter season in the northern hemisphere. There are…
Cool Talk: Liquid Injection in Optyma™ Plus P02
Nov 30, 2019 • 10 min
The Danfoss Optyma™ Plus condensing unit is ideally suited for use in locations with high ambient temperatures. However, when you combine the naturally high environmental heat with the use of a new refrigerant, the scroll compressor inside the unit can…
Cool Talk: Glenn Moore and the condenser
Nov 1, 2019 • 12 min
Jens dug through the Danfoss archives and found four articles written by Glenn Moore, longtime Danfoss Technical Field Service and Support Manager. In this episode, Jens reads through each one to reveal insightful and still-relevant information about…
Cool Talk: CO2 as refrigerant in larger commercial systems
Sep 19, 2019 • 13 min
This podcast is about the use of CO2 or carbon dioxide as a refrigerant in larger commercial systems like supermarkets or hypermarkets. CO2 or carbon dioxide, is a natural occurring substance, a natural part of the earthly atmosphere, although the…
Cool Talk: Global trends on refrigerants
Sep 17, 2019 • 22 min
Cool Talk: Interview with Norbert Blatz on switching to low-GWP refrigerants. Norbert tells us what you need to know when performing a retrofit in an existing system, what considerations you need to have, what protocols, guidelines and standards you need…
Cool Talk: Charging new refrigerant
Sep 15, 2019 • 10 min
In this episode Jens talks about the things to consider when charging new refrigerant into an existing system, what to think of, what to do, and what not to do. You can do the shift in charge from HFC to another HFC and in some cases also from HCFC to…
Cool Talk: Why compressors fail
Aug 26, 2019 • 13 min
Why compressors fail: John Broughton, Danfoss Global Application Specialist, joins Jens for a special edition of the podcast. They discuss the most common reasons compressors fail and how to avoid these failures. John also shares some sage advice to keep…
Chapter 18: Programmable controllers
Aug 2, 2019 • 12 min
In this chapter, Jens discusses PLC’s or “Programmable Logic Controllers”. He dives into the logic behind them and the Boolean perception of logic, i.e. “True” and “False”. He also covers a bit about programming, statements, and conditions.
Chapter 17: System managers and extension modules
Jul 1, 2019 • 9 min
This chapter sheds light on more complex store systems, including remote monitoring. These systems are tailored for large contractors, supermarket chains, and independent monitoring companies. These systems provide real-time status monitoring, which helps…
Chapter 16: The Danfoss Pack Controllers
May 28, 2019 • 12 min
Jens talks about capacity controls and Danfoss Pack Controllers. He also discusses different ways of controlling the energy consumption of the most energy-consuming part of the refrigeration system: the compressor. Finally, he touches on the condensing…
Chapter 15: Case Controllers (AK-CC 550)
Apr 30, 2019 • 16 min
We’re moving on to more complex controllers and therefore also the applications that go beyond basics. Jens talks about controlling stand-alone applications like glass door merchandisers and display cases and the controlling of the different functions,…
Chapter 14: ETC, the simple controller
Mar 28, 2019 • 16 min
The ETC has a simple design, but it’s still a pretty clever refrigeration control that can yield some impressive benefits. In this episode, Jens uses the ETC as an example for explaining the sensor-controller-compressor interface, signal logic,…
Chapter 13: Digital Communication
Feb 22, 2019 • 10 min
In this episode, Jens shares what you need to know about digital communication. He also covers the issues related to setting up a good and stable communication with your electronic controllers for the refrigeration business.
Chapter 12: Electricity, the absolute basics
Jan 31, 2019 • 12 min
Get a lightning-fast recap of what you learned about electricity and electrical components in trade school, plus a few secrets they didn’t tell you at the time. This episode covers both the good and the bad, and it’s all essential knowledge that you’ll…
Chapter 11: Indirect cooling
Dec 19, 2018 • 11 min
In this episode, Jens takes you on a journey through indirect cooling, brine, and other coolant types. Discover remote cooling, where you transfer cooling with fluid coolants to avoid using hazardous refrigerants near food or inhabitable environments.…
Chapter 10: Taking control of your cooling system
Dec 10, 2018 • 10 min
In this episode, Jens talks about the most common ways of controlling cooling systems—from basic smaller systems to complex commercial versions. He also briefly mentions electronic controls and their benefits.
Chapter 9: Bringing refrigerants down to earth
Nov 27, 2018 • 7 min
Chapter 9 is all about refrigerants, including what they are made of and what you should expect when using them. Safety is job 1, so Jens focuses on sharing about safety codes and precautions. Finally, he gives you a quick shot of retrofitting knowledge.
Chapter 8: Condensers, the unsung heroes of refrigeration
Oct 30, 2018 • 7 min
In this chapter, Jens discusses the condenser and the role it plays in the refrigeration process. You’ll learn about the two main types of condensers and what you need to keep in mind when working with the air-cooled variety. Last, but not least, Jens…
Cool Talk: Refrigerant retrofit (Refrigerant Week 2018)
Sep 24, 2018 • 11 min
In this episode, Jens takes a quick break from the usual topics to cover something special as part of the Danfoss Refrigerant Week 2018 (Sept 24 - 28). As new regulations phase out old refrigerants in favor of more environmentally friendly ones, HVACR…
Chapter 7: Compression: how to compress and control it
Aug 30, 2018 • 9 min
Chapter 7: The compression, how to compress and control the compression Let’s talk about compressors. There is so much to learn when it comes to compression and how you achieve it. In this episode, Jens eases you into the topic by touching upon the…
Chapter 6: Controlling the evaporation electronically
Aug 9, 2018 • 8 min
Chapter 6: Controlling the evaporation electronically This episode is all about controlling the evaporation and expansion process electronically using sensors, controllers, and two types of electronic expansion valves. Electronic control can provide a lot…
Chapter 5: Controlling the evaporation
Jun 28, 2018 • 10 min
Chapter 5: Controlling the evaporation In this chapter of Chilling with Jens, we discuss the thermostatic expansion valve — a key component in many refrigeration systems, such as cold rooms or walk-in coolers. The TXV, or metering device, is installed to…
Chapter 4: The parts of a refrigeration system
Apr 24, 2018 • 7 min
Chapter 4: The parts of a refrigeration system This chapter is about the components in a refrigeration system that are necessary for the system to work. We take a look at the expansion device, compressor, evaporator, and condenser, and how they work…
Chapter 3: All about refrigerants
Apr 24, 2018 • 6 min
Chapter 3: All About Refrigerants This third chapter is about the different types of refrigerants, what they are, and the advantages and disadvantages of each. Discover the world of refrigeration! “Chilling with Jens” is a new series designed to take you…
Chapter 2: The condensation process
Apr 24, 2018 • 5 min
Chapter 2: The Condensation Process In this second chapter, we look at how refrigerant absorbs heat from the things we want to cool down and transports it out of the refrigeration system. Discover the world of refrigeration! “Chilling with Jens” is a new…
Chapter 1: The evaporation process
Apr 23, 2018 • 7 min
Chapter 1: The Evaporation Process This chapter is all about the evaporation process. We dive into how cooling takes place and what physical mechanisms need to be in play to make that happen. Discover the world of refrigeration! “Chilling with Jens” is a…