Refrigeration Up-Date 2016
Again in 2016, the Board is offering its licensees and others in related trades the opportunity to explore a wide variety of products and services. Mark your calendars now and plan to attend Refrigeration Up-Date 2016:
Wednesday, February 17, 2016
Embassy Suites Grand Ballroom
460 N Cherry St.
Winston-Salem, NC 27101
The HVAC/R industry is changing fast. With the growing demand for energy efficiency, the pace in which new products and technologies are developing is accelerating. We are very excited about this year’s Up-Date. Much thought has been put into bringing you a program that will help you stay up-to-date on the latest products and technologies for the HVAC/R contractor.
Registration is $25 and includes lunch, breaks and entrance to the exhibit area. We expect a large number of participants for this event and would appreciate you pre-registering. Download your Registration Form and return it to us by mail or email to reserve your spot.
EXHIBITORS as of Jan. 14
Bosch Water Source Heat Pump
Direct Refrigeration Sales
Engineering Equipment Sales
E. V. Dunbar
IRP, NRP and PSG
NC DOL OSH Division
Sporlan Valve, Division of Parker
True Food Service Equipment
Energy Seminar Follow-up
January 14, 2016
At the recent Energy Seminars held across the State, several questions were asked that needed research for the answers. Below are the questions and answers. Our thanks to Mark Kramer , The Chemours Co, - Fluoro Chemicals for providing these answers.
1. If a refrigeration system has capillary tubes instead of TXVs, will XP40 work? Is it different for R-404A vs R-22 systems (i.e. Will our answer be any different for 22 system conversions vs. 404A)? For an existing R-22 system with a capillary tube, the mass flow rate and operating pressures of Opteon™ XP40 (R-449A) are a close match, and will likely perform adequately, however for optimal results it is recommended to replace the cap tube with a TXV when possible. R-404A has somewhat different properties than XP40. Therefore, it is recommended for optimal results to replace the capillary tubes with TXVs.
2. 134a tends to "gunk up" capillary tubes, do we know if XP10 will be less likely to do this? In the early days of HFC/POE use, there were issues with plugging in some capillary tubes. The 134a/POE tended to gunk up capillary tubes because the drawing lubricants used in making the capillary tubes had compatibility issues with POE. In recent years manufacturers have resolved most of these issues and cap tube plugging issues with HFCs and HFC-containing blends including XP10 are expected to be extremely rare.
3. Can I change a 22 chiller with flooded evaporator over to operate on XP40? Zeotropic refrigerant blends, including XP40, R407C, etc., are not recommended for use in chillers with flooded evaporators, as they do not perform well.
4. What compressor manufacturers approve XP40? XP40 (R-449A) is approved/listed for a growing number of OEMs in the commercial refrigeration market, including industry leaders Bitzer and Emerson (Copeland). Please visit our website for the most recent information on OEM approvals.
5. Is demand cooling/liquid injection required on a system that is operating on XP40? XP40 has a lower discharge temperature than R-22 and higher discharge temperature than R-404A. It is always recommended to always consult with the compressor manufacturer for specific guidance on demand cooling. For retrofit of R-22 systems, it is recommended to leave demand cooling in place, although it will likely run less often. As a general rule of thumb, XP40 is expected to behave similar to R-407A with respect to the need for demand cooling/liquid injection.
6. On the CA Supermarket retrofit, the suction temperatures and pressure look very different than the data while operating on 404a (prior to retrofit). How can you say that there are no operational issues or that the case temps did not change when this data looks so different? The suction pressure set points for XP40 are ~ 5 psi different from R-404A based on the respective PT charts for the two refrigerants. The suction temperature data reported is from actual measurements on one specific system, and was influenced by a number of unique factors, including post-retrofit proper adjustment of evaporator superheats, correcting improperly installed TXV sensing bulb, among others which may cause the system suction temperature after the conversion to be different than prior.
7. Can you reclaim XP40? Yes, as long as it has not been mixed with any other refrigerants .
8. Is the PT chart available? Yes, it can be found at the link below and it is also included in each retrofit guide. https://www.chemours.com/Refrigerants/en_US/products/Opteon/Stationary_Refrigeration/assets/downloads/Opteon-XP40-pressure-temperature-data.pdf
9. What are the toxic by-products if an HFO burns? Any health concerns? HFOs are similar to HFCs, in that if they are exposed to an open flame from halide detection or brazing, hydrogen fluoride, a hazardous acidic compound, can be generated. The probability of generating hydrogen fluoride, and the recommended safe work practices to prevent this scenario, are the same whether using an HFO or HFC. Like HFCs, HFOs are safe to use when handled properly.
10. If you top off the XP40/XP10 multiple times, will this impact its A1 non-flammable rating? No. As part of the ASHRAE Standard 34 listing process for a A1 rating, the refrigerant blend undergoes rigorous fractionation testing, including multiple leak recharge scenarios in order to assure even the worst case scenario remains non-flammable.
October 9, 2015
ASHRAE is an international membership organization founded to advance the arts and sciences of heating, ventilation, air conditioning, refrigeration and related issues.
The HVAC&R Industry, ASHRAE's free weekly eNewsletter for HVAC&R professionals, provides relevant, timely information about industry and technology for people who create healthy, comfortable indoor environments. The HVAC&R Industry is available to anyone interested in staying up-to-date with the latest news in the HVAC&R industry.
September 18, 2015
Over 200 contractors and refrigeration technicians attended the Board's energy seminars held throughout the state. The Board appreciates all of those who attended and hopes that they are better prepared for the new DOE regulations set to come.
The Board would especially like to thank our speakers for the events, Jonathan Melchi - HARDI, and Mark Kramer - The Chemours Co.
June 17, 2015
Governor McCrory recently appointed Morton Blanchard (left) and Tim Welch to the State Board of Refrigeration Examiners. Blanchard has been a refrigeration contractor for 40 years and is President of Blanchard Refrigeration Contractors, Inc. Welch has held his refrigeration contractors license for 31 years and serves as President of Frank Welch and Sons.
Board Chairman T.E. Street (left) recently presented outgoing member Jerry King with a plaque in appreciation of his many years of service to the Board.
2015 Scholarship Awards
June 17, 2015
The members of the State Board of Refrigeration Examiners are delighted to announce the winners of the 2015 SBRE Scholarships. After all points were totaled and additional criteria factored in, scholarships were awarded to Patrick S. Kirby, Roanoke Chowan Community College; Thomas Bucklen Stancell II, Alamance Community College; and William Anthony Stover, Southeastern Community College. Since the inception of the scholarship program over $30,000 has been awarded to students in the NC Community college system!
SBRE scholarships are available to persons enrolled in or interested in enrolling in an Associate in Applied Science Degree Program of study in HVAC/R, or those interested in enrolling in or enrolled in an Associate in Applied Degree Program of study in commercial refrigeration.
Applicants must meet the following criteria to qualify for a scholarship:
1. Be a resident of NC;
2. Be enrolled (or intend to enroll) in an Associate in Applied Science Degree of Study in Commercial Refrigeration or HVAC/R Technology;
3. Maintain a grade point average at or above the level required for graduation;
4. Continue for the duration of the scholarship at the college where he or she was enrolled at the time of the scholarship award.
Two or more scholarships are awarded annually depending on available funds. Scholarship applications are due in the Board office by April 15 of each year. If you would like to apply for the SBRE Scholarship, complete and mail in your Scholarship Application.
Garden City Ammonia Program
February 13, 2015
The Garden City Ammonia Program offers Industrial refrigeration training including Ammonia Operator Training, Industrial Ammonia Refrigeration Training, Ammonia Certifications, and Technician Training with hands on equipment. Randy Williams and the GCAP Coolcast team provide education for the industrial ammonia refrigeration operator for efficiency, safety, and compliance. Their spectrum of ammonia refrigeration training is customized to the quick start with no experience to the seasoned operator. GCAP supplies training for over 700 different companies and over 1,800 students per year. Visit the GCAP website for more information.
June 24, 2014
Because the Annual Refrigeration Update and Trade Show is temporarily suspended (due to the high cost of travel, time off, etc. for the participants), the Board will begin offering educational opportunities on this website. Please check back often for more links and/or videos.
The first website we would like to share is GreenChill, an EPA partnership with food retailers to reduce refrigerant emissions and decrease their impact on the ozone layer and climate change. The following video is an example of the information available at the site.
GreenChill works to help food retailers transition to environmentally friendlier refrigerants, lower refrigerant charge sizes and eliminate leaks, and adopt green refrigeration technologies and best environmental practices. Be sure to take advantage of their educational information and to check back here for more!