BACK
3 Ways to Reduce Compression Ratio in a Heat Pump
Understand Heat Pumps
Why Discharge Line Temperature is a Useful Reading
Compressor Mass Flow – Some Thought Experiments
Why A/C Units Freeze w/ Eric Shidell (Podcast)
#suction pressure
Tech Tips:
We’ve talked about compression ratio a lot over the years. Compression ratio is the number you get when you divide the absolute head pressure (PSIG + 14.7) by the absolute suction pressure (PSIG + 14.7). It measures the efficiency of a compressor, and lower numbers indicate that the compressor is moving more refrigerant while consuming […]
Read more
My goal in this tech tip is to help those who struggle to understand heat pumps get their heads around them as quickly as possible and understand some of the things a tech needs to know about them. The basic idea of a heat pump is to use the compression refrigeration cycle to move heat […]
Read more
For this tech tip on discharge line temperature, I’d like to give special thanks to Roman Baugh for the section about compressor superheat. It’s not something we talk about very often outside of chiller and commercial refrigeration applications, but it definitely has value in the HVAC world as well. Thanks, Roman! Since I started in […]
Read more
In order to wrap my head around diagnostic issues, it helps me engage in thought experiments where I think of more extreme examples of an issue or situation or consider the ideal to find the “edges” of a concept. Once I find the extreme edges, I can begin to sort down to a more exact […]
Read more
Videos:
Podcasts:
In this episode, Bryan speaks with Eric Shidell about some of the basics of system freezing, what causes it, and what to do about it. Freezing is a normal part of some equipment, such as low-temperature freezers and outdoor units on heat pumps. On straight-cooling systems, freezing is NOT normal and indicates poor operation. Ice […]
Read more
