There are several designs for airflow through the evaporator coil, and for draining the condensate water from the coil, depending on the installation. The different designs are known as the A coil, the slant coil, and the H coil.
Those small-diameter coils — with names like MicroGroove, microchannel, and micro-multichannel — have gained a beachhead in residential heating and air conditioning, and are advancing in commercial HVAC, with refrigeration on the horizon.
When a refrigeration system has lost most of its refrigerant charge in a short period of time, the leak is probably significant and should be easy to find.
Now that the battle regarding ozone depleting potential (ODP) refrigerants has ended with the phaseout of CFCs and HCFCs, the fighting has shifted to issues related to the global warming potential (GWP) of the remaining and newly developing refrigerants.
The attention being paid to so-called natural refrigerants is showing a shift toward hydrocarbon refrigerants, even as CO2 gains a stronger foothold and ammonia maintains a high profile. But, whether or not there will be a dominant natural choice remains unclear even in Europe, much less North America.
A-Gas’s acquisitions in the U.S. will set it up for a significant expansion into North America, including the international rollout of its refrigerant reclamation technology
The Air-Conditioning, Heating, and Refrigeration Institute has issued a white paper titled “Reports of R-134a Contaminated with R-40 and Other Refrigerants.” That paper is featured here.
DuPont Refrigerants and EOS Climate have announced a program to stimulate the return of recovered CFC refrigerants. The new CFC BuyBack Program gives DuPont distributors access to a streamlined process and gives contractors and business owners the same economic benefit for both small and large quantities of CFCs.