Performance

As CO2 gains more traction in our industry, our customers will ask what the advantages of CO2 are over ammonia and synthetic refrigerants. I feel this article (while it drills into the thermophysical properties quite a bit) helps clarify the advantages and disadvantages of one of the re-emerging refrigerants in our industry, CO2. Please contact […]

CO2 Condensing Units Author: Chris Savage Here at Carlson & Stewart Refrigeration, we are very aware of the of the emphasis on “natural refrigerants”. In fact, a big portion of our business is in the use of Ammonia as a refrigerant. The other side of our business is smaller, what we call “commercial refrigeration” and

With the continued push to reduce energy consumption in both the US and abroad the discussion about the feasibility of utilizing heat pumps in the United States has begun to heat up. Traditionally the refrigeration industry has been most interested in the low-pressure cold side of the refrigeration process, but what about all the energy

SUMMER MAINTENANCE Well we did it. We finally are able to put away the snow shovels, snow blowers, hats and mittens. As the temperatures outside warm, not only do we feel it on our vitamin D deprived skin, but so do our home Air Conditioners and commercial and industrial refrigeration systems. Carlson & Stewart Refrigeration

Condenser Drop Legs Last week I had the opportunity to attend a RETA Safety Day.  At this meeting I listened to a presentation on purging non-condensables and it reminded me of an important design aspect when designing/installing the piping for ammonia condensers. The situation I am thinking about primarily concerns installations involving multiple condensers, or

The focus this month is a brief look at the American Innovation and Manufacturing act or AIM act for short. This policy seeks to dramatically reduce the usage of HFC refrigerants with the target of a 85 percent reduction by 2036. The goal of the policy is to reduce the amount of refrigerant with high

Hazard Analysis By Chris Savage Most of us in the ammonia refrigeration world are aware of the OSHA and EPA compliance guidelines. You are familiar with PSM (Process Safety Management) by OSHA and the RMP (Risk Management Plan) by the EPA. These 2 programs are very similar, with only a few minor differences. But the

Hydrocarbons such as Propane, Propylene, and Isobutane are great natural refrigerants that are successfully used in commercial refrigeration appliances today. Hydrocarbons can boast the low global warming potentials regulators are looking for without being Ozone depleting. So why don’t they get as much airtime as other natural refrigerants such as ammonia and CO2? Perhaps the

June 2022 Blog Post Author: Erik Hansen   Subject: Stainless Steel Condenser Tubes or Galvanized?  That is the question! NOTE: The posting will dig a little into product selection revolving around evaporative style condenser products and not necessarily air-cooled or adiabatic condensers.   Industrial refrigeration systems in the Midwest often use evaporative type condensers for

If you have ever been involved in buying or installing a new evaporatively cooled condenser, then you’ve probably heard about evaporative condenser passivation. You probably heard it is important and a process you should strive to complete. But if you are like many owners, operators, or heck even refrigeration engineers, that’s probably where your knowledge