The ANSI/IIAR Standard for Minimum System Safety Requirements for Closed-Circuit Ammonia Refrigeration Systems does a fantastic job setting the baseline requirements for existing ammonia refrigeration systems. One possible shortcoming of the standard was the absence of a formal evaluation that could help any prospective ammonia operator or service technician evaluate the system with relative ease. […]
IIAR 9 Minimum System Safety Evaluation Read More »
In the past few decades, the world around us has undergone a lot of changes. The world of Direct Expansion (DX) ammonia refrigeration, however, hasn’t changed a whole lot. Enhanced tubes or fins have brought some improvements to the tried-and-true evaporators we are all familiar with. Controls technology has advanced to allow us to utilize
Ejectors in NH3 DX Evaporators Read More »
If you’ve ever asked a hiring manager about how their search for talent is going, it seems you’ll often hear “You can’t find any more good help these days”. If you ask around in 2023, that statement is as true as it’s ever been. CSR is continually looking to add more fantastic technicians to an
Finding Good Help – Refrigeration Industry Read More »
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
Heat Pumps – Heating Up Read More »
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
AIM Act – Awareness Read More »
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
Hydrocarbons in Refrigeration Read More »
An important part of the refrigeration design process is determining what size refrigerant lines returning to a compressor or an accumulator/recirculator vessel should be. These return lines are often simply called suction lines and are sized based on the tonnage of the refrigerated load. Recommended pipe size will change based on tonnage as well as
Suction Lines: A Quick Overview Read More »
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
Evaporator Condenser Passivation 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
Secondary Refrigerants Are Worth A Second Look 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
Staying Cool – Basic Heat Loads Read More »