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A website dedicated to advancing the art and science of ammonia refrigeration

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PSM audits

How does Ammonia Refrigeration Work?

How does Ammonia Refrigeration Differs?


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What’s NHtres all about? is a website dedicated for your use – hopefully and eventually to become the "home" page for people working in ammonia refrigeration (besides the news sites, etc).  Do you have a topic you’d like to discuss among others in this industry?  You can post it here on the discussion page.  Need help with a head scratcher?  You’ve come to the right place – you can post it here also.  I’m always available for consultation and will respond to questions you pose to me on this site, however be aware that the discussion page is open to every visitor.  If you have something you’d rather not be posted here, you can email me. This site will, as time goes by, fill up with links to many different sites all in this industry world-wide.  Need some info on servicing a particular component?  I hope to have a link for you here.

Over the next few months, this site will raise numerous subjects, among them:

  1. "Some of our liquid overfed evaporators just don’t seem to be working all that well – what’s going on?"  In a nutshell, brining.  This is the topic of the first in a series of downloadable documents from this site.  For a copy of this PDF file, click here.  Other topics will soon include:
  2. Our refrigerant pumps are cavitating – why and what can we do about it?
  3. We occasionally hear a loud "hammering" noise in our engine room – where could it be coming from?
  4. We have excessive oil carryover
  5. Our evaporators seem to defrost too slowly
  6. We occasionally experience accumulator liquid high level alarms/shutdowns
  7. We experience rapid swings in suction pressures
  8. We experience rapid swings in discharge pressures
  9. How can we find out if we have water in our ammonia and if so, how much?

If you run into a situation not on this list, email me so we can do some brainstorming and get you pointed towards one or more possible solutions.

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