An iced evaporator is a common problem encountered by technicians servicing medium-temperature refrigeration systems. A visual inspection of the coil will show this obvious problem. Most technicians will install their low-side service gauge, find the running pressure to be lower than normal, and conclude the system has a low refrigerant charge. However, an iced evaporator can be caused by a totally different system issue.

New rules dictating energy usage in walk-in coolers and freezers (WICF) will become law Sept. 7, according to a recently published final rule, courtesy of the U.S. Department of Energy (DOE).

A U.S. Court of Appeals has ruled that the U.S. Environmental Protection Agency (EPA) cannot ban the use of hydrofluorocarbons (HFCs).

Thermal energy storage has been a proven commodity for years in Europe, but the technology has seemingly been on the peripheral of the HVAC industry in the U.S. Now, energy storage is gradually stepping into the industry spotlight, and manufacturers are ready and willing to showcase their offerings in this important space.

The U.S. Environmental Protection Agency (EPA) has delayed the effective date of certain amendments to its Risk Management Program (RMP) rule until Feb. 19, 2019.

The capacity of a compressor can be affected by a refrigeration system’s ever-changing pressures. In addition, suction pressure entering the compressor will change the density of the suction gasses within the compressor and affect its capacity.

A few days prior to the start of the recent ATMOsphere 2017 conference held June 5-7 in San Diego, President Donald Trump announced that the U.S. would be withdrawing from the Paris climate agreement. That did little to dampen the mood among the conference’s 400-plus attendees.

The Chemours Co. has announced that the U.S. Environmental Protection Agency (EPA) through its Significant New Alternatives Policy (SNAP) program, has listed the low global-warming potential (GWP) refrigerant Opteon™ XP44 (R-452A) as acceptable for use in new and retrofit equipment for refrigerated transport and remote condensing units used in retail food refrigeration.

Danfoss’ latest “Engineering Tomorrow” Application Development Center in Tallahassee, Florida, will be able to test mildly flammable refrigerants at global nameplate voltages, with real-time data acquisition and performance.

The Sacramento Municipal Utility District (SMUD) has launched an incentive program designed to promote the adoption of a new generation of natural refrigerants that can help reduce greenhouse gas emissions.