Articles Tagged with ''refrigeration cycle''

John Tomczyk, Professor of HVACR at Ferris State University and co-author of Refrigeration and Air Conditioning Technology, discusses refrigerant undercharge.

Relief valves are used to release abnormally high pressure inside a vessel before that pressure causes the vessel to erupt. 

With all the talk in recent years, and even more so in recent months, regarding refrigerants like CO₂ and hydrocarbons (HCs) making inroads in refrigeration equipment, the trends in the ‘R’ of HVACR are even more widespread. 

A recent state-of-the-industry panel session focused on the cost-effectiveness and energy efficiency of natural refrigerants when compared to the much more common f-gases.

In restaurants, those large, walk-in refrigerators and freezers need to be energy efficient to help maintain sometimes thin profit margins. And they need to run quietly so as not to disturb customers who may find themselves seated close to the kitchen. 

In supermarket refrigeration, much of the refrigerant talk is on the so-called ‘naturals.’ And among the naturals, one of the most talked about is R-744 (CO₂). 

Few developments in recent months concerning refrigerants have stirred up such intense interest as the efforts to introduce a product called Frost-22a to the farm-supply distribution market.