Here at Carlson & Stewart Refrigeration we hear something like this all too often: “My cooler/freezer quit working last night….now all of my product is lost.” What do you do if your cooler or freezer stops working when you are away? More than likely you have something inside of that cooler or freezer that is […]
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With fall fast approaching it is a great time to remind everyone about the importance of commercial refrigeration routine maintenance. Maintaining your systems for optimal energy efficiency is great for the environment and for your pocketbook. Whether you do the maintenance yourself or have a preventative maintenance agreement with Carlson and Stewart Refrigeration, the importance
Preventative Maintenance Basics – Condenser and Evaporator Coils Read More »
Source Article: Condenser by IIAR By Bryan Haywood Carlson & Stewart Refrigeration (CSR) has been asked this question many times in the past and we have found that many people have their own interpretations. In larger systems we have stressed people to follow their PSM guidance. This article will explore the questions so many have
As summer approaches I thought it would be a good idea to revisit one of our previous blog postings from a few years back… How many of you have “scale” on your evaporative condenser? [I am guessing your hand might be in the air]. How many of you feel that this is “normal” and something
How many of you have “scale” on your evaporative condenser? Read More »
Secondary Refrigerants Are Worth A Second Look All refrigeration systems, at their very core, convert electrical energy into heat removal potential. Primary refrigerants typically do this via the refrigeration cycle of compressing, condensing, expanding and evaporating. Secondary refrigerants typically transfer heat from place to place without changing phase. Volatile secondary refrigerants are the exception to
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While we welcome the new year and all the challenges that come with it, the commercial refrigeration industry will see some energy efficiency changes. The Department of Energy (DOE) has implemented changes on new energy use standards that have become law across the country in 2020. We will also look at additional requirements that will
Energy Efficiency Changes 2020 Read More »
Staying Cool – Basic Heat Loads by Jayson Noetzelman When it comes to refrigeration, Carlson & Stewart is in the business of helping you stay running and stay cool, but even a system running perfectly might not always be as cold as you’d like. What can be done to improve your situation? A business owner
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Source Article: https://www.contractingbusiness.com/refrigeration/propane-makes-comeback In a time when refrigerants are being closely evaluated for their environmental impacts, propane (R-290) is emerging as an increasingly viable alternative. With a global warming potential (GWP) of 3 and an ozone depletion potential (ODP) of 0, R-290 poses virtually no threat to the environment. In fact, the Environmental Protection Agency (EPA)
Propane… Possible Commercial Refrigerant? Read More »
Ammonia As a Refrigerant: Pros and Cons Last month, a 5000 pound ammonia leak occurred at a Boston-area seafood warehouse that killed one worker and forced a shelter-in-place order from Boston Police. Problematic procedures may be to blame. So as you read the pros and cons of Ammonia as a refrigerant below, remember these key takeaways: ongoing, scheduled evaluations and preemptive maintenance are
Ammonia As a Refrigerant: Pros and Cons Read More »
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
Ammonia Compressors Read More »