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 …
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 …
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 …
Honeybee’s By Chris Savage You might be thinking, why the heck would there be a blog post on a refrigeration website about honeybee’s? Up to about a month ago, I would have been thinking the same thing! Recently Carlson & Stewart Refrigeration was contacted by a local, South Dakota, honey producer. He called with some …
Moisture Control By Chris Savage Moisture control…..what does that mean? Relative humidity, dew point, condensation, evaporation, dry bulb, wet bulb, enthalpy, specific volume, humidity ratio, vapor pressure, dehumidification, desiccant, reheat, grains of moisture…..these are all terms that you might come across when you start talking about moisture control. If any of this terminology is unfamiliar …
Over the years there are and have been a variety of compressor styles that have been used in ammonia refrigeration systems. Each of these compressor styles accomplish the same task of increasing the pressure of ammonia vapor. They provide the motivating force that moves the refrigerant through the system. So, what type of compressors do …