A refrigeration system’s compression or pressure ratio is defined as the absolute discharge pressure divided by the absolute suction pressure. Calculating this ratio can be a big help when it comes to troubleshooting a system.
Refrigeration contractors are keenly aware of the value of the maintenance they perform for their grocery store and supermarket clients, but, in some cases, they may find themselves working with clients who underestimate it.
Wiegmann Associates announced it has completed work on a new LEED-certified refrigerated food distribution center for The Chefs’ Warehouse in Las Vegas. As engineer of record and mechanical and controls construction manager, Wiegmann designed and installed all refrigeration systems, HVAC equipment, and a building automation system.
The world is changing and the refrigeration industry is changing along with it, but the refrigeration field is strong and will continue to be a great industry to work in for the next generation.
Danfoss recently hosted its 25th EnVisioneering Symposium, which addressed how an increasing industry-wide focus on refrigerants and energy is driving changes in the design, deployment, and maintenance of refrigeration equipment and supermarkets.
Emerson Climate Technologies Inc. addressed issues like the delisting of specific gases in certain applications and energy consumption reduction regulations at its E360 event held Sept. 3 at the Westin Dallas Fort Worth Airport Hotel in Dallas.
Last month’s article covered a 400-series refrigerant blend’s total temperature glide, effective temperature glide, fractionation, superheat, subcooling, and average evaporator and condensing temperatures using a pressure/temperature chart. This article deals with system pressure drops and net temperature glide in a refrigeration and/or air conditioning system.
Hillphoenix announced it has received a 2014-2015 Achievement Award - Store Certification Excellence from the U.S. Environmental Protection Agency’s (EPA’s) GreenChill Partnership program. It’s the company’s fifth GreenChill award since the program launched in 2007.
System design, performance, and service conditions must be evaluated when retrofitting with a zeotropic or near-azeotropic refrigerant blend. Always follow the refrigerant manufacturer’s retrofit guidelines before retrofitting with any refrigerant, or system performance could be affected and/or injury may occur.
There is a vast selection of refrigerants, and sometimes a technician has a choice in selecting a refrigerant for a particular system. Knowing some of the basic properties of refrigerants can assist a technician in making that selection.