The amendment, deemed the “Dubai Pathway,” is expected to be completed in 2016 and puts to rest an ongoing discussion regarding HFC usage that’s persisted among Montreal Protocol members for more than five years. 

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.

At the just-completed 36th Montreal Protocol Open Ended Working Group (OEWG) meeting in Dubai, the Parties achieved agreement on a mandate for the contact group. This is a significant step towards amending the Protocol, a step which has not been achieved in at least six years.

Representatives from participating industry associations, refrigerant producers, and manufacturers of refrigeration equipment and components also provided progress reports detailing the steps they’ve taken over the past year to meet the goal of reducing hydrofluorocarbon (HFC) use 80 percent by 2050. 

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.

Not only do repeat failures take away from the contractor’s profit margin, they also tarnish a company’s professional image. Finding the cause and repairing it not only keeps the customer happy, it keeps the contractor profitable.