} Ammonia, a combination of nitrogen and hydrogen, is a natural substance and is not considered a threat to the atmosphere. Pros and Cons of Ammonia. Operation cost The price of ammonia is lower, the refrigerating capacity per unit is higher, and the power consumption is lower. For each project, CIMCO looks at initial cost, energy consumption and maintenance, and … /* View slug: cs-sidebar-facility - end */ Industrial refrigeration system basics – Ammonia refrigerant. ul, ol { How Long Will Our Refrigeration System Last? In most typical refrigeration systems the cold ammonia is circulated or flooded around a series of tubes which contains a brine solution (calcium chloride and water). The short answer is: all Freon is refrigerant, but not all refrigerants are Freon. While refrigerants are often collectively referred to as “Freon,” Freon is actually the name of one specific brand of refrigerant. margin: 0% 2% 2% 0%; margin: 12px 0px 12px 0px; Meanwhile, the operator or operating board is simply looking for the best solution to their maintenance, upgrade, and cost concerns. While the last “true” Freon, R-22, will be phased out of the new equipment market next year, the replacement refrigerants approved by the U.S. Environmental Protection Agency (EPA) are recognized universally as Freons and still have a valuable role to play in the modern refrigeration industry. Port said, “After examining the facts when comparing ammonia to R-134a for use as a refrigerant in a food processing facility, the following factors make ammonia a superior choice: “The thermodynamic properties of R-134a are such that about six volumes of refrigerant are required to produce the same refrigeration capacity as a single volume of ammonia, which … The lower temperature levels complicate the brine system as we struggle to adequately defrost these areas. Check out the January 2021 edition of Process Cooling: Cryogenic industrial process cooling insulation considerations, cooling tower product roundup, industrial chillers, news and much more! There are horses for courses” advises an old saying, which basically means that “one size doesn’t necessarily fit all.” This principle applies to a range of situations, including the refrigerants used in industrial cooling applications. The food and beverage business has been dominated by ammonia as a refrigerant. This website requires certain cookies to work and uses other cookies to help you have the best experience. All Rights Reserved BNP Media. So as you read the pros and cons of Ammonia as a refrigerant below, remember these key takeaways: ongoing, scheduled evaluations and preemptive maintenance are critical for any ammonia … /* ----------------------------------------- */ /* View slug: cs-sidebar-facility - start */ Depending on the conditions of the air or process (e.g. if (!window.mc4wp) { #featurepic { Packaging the systems together would lower field labor and provide more of a single-sourced solution while reducing mechanical room requirements. That is why it has to be handled with care, and all ammonia systems have to be designed with safety in mind. The open-drive system motor rejects the motor heat to the atmosphere, while the hermetic or semihermetic compressor rejects the majority of the motor heat to the refrigeration system. Words: 2,740; Pages: 6; Preview; Full text; Ammonia Refrigeration – How It Differs Of the number of visitors to this website, the most frequently asked question is: "How does ammonia refrigeration work?" But because CO2 is a very dense gas, the size of the equipment needed to provide the same refrigeration effect is significantly smaller. Is an Ammonia Refrigeration System the Right Choice? For webinar sponsorship information, visit www.bnpevents.com/webinars or email webinars@bnpmedia.com. The overall BHP per ton on an ammonia system at a -20°F (-29°C) suction temperature is approximately 1.86, while the equivalent R-22-based system has a BHP per ton of 1.96. The main difference in the perception of Freon vs. ammonia systems has as much to do with the systems as the refrigerants themselves. margin: 0% 0% 0% 0%; /* ----------------------------------------- */ Adding a separate suction level with the attendant compressor and vessels would be costly. Leakage detection: Ammonia presence is readily noticeable due to its sour smell already at concentration of 50 ppm in volume in the air; thus, ammonia leakages from a refrigerant plant can be easily noticeable, and the fault can be repaired. However, new and emerging Freon technologies might narrow the gap. Ammonia is a toxic refrigerant, and it is also flammable at certain concentrations. Ammonia refrigerants are less expensive initially, but they come with the risk of a toxic chemical leak. /* View slug: latest-studies - end */ Ammonia is also already being used in large heat pump … Farewell Freon…or maybe not. • Characteristics of Ammonia • Chillers using both refrigerants with their pro’s • Examples of installations • Conclusion . NH= Corrosief en tast Cu aan! For more information, call (918) 825-7222, e-mail susanw@rae-corp.com or visit www.rae-corp.com. They require more regulation than Freon systems, and they require specially trained operators. Refrigerants: Ammonia vs CO2. line-height: 125%; Freon is a man-made refrigerant that was developed as an alternative to both sulfur dioxide and ammonia. /* View slug: cs-sidebar-community - start */ In ice arenas the ammonia refrigerant is in a closed loop which essentially means it is contained within the system. Freon can provide an alternative in both air-cooled and evaporative condenser systems. “There is a trend to lower the storage temperature of nuts to as low as 35°F (1.7°C) to extend the storage life. After that, ammonia becomes increasingly attractive. Tell me how we can improve. Chillers using both refrigerants : ammonia and R134a. In some food-handling applications such as the storage of nuts, Freon may ultimately be the best choice. The anomaly exists because R-22 is still at a positive pressure at the lower temperatures, while the ammonia system is in a vacuum below -28°F (-33°C). Even a small ammonia leak can turn the nuts black, rendering them unusable,” Vantine said. } Visit our updated. Arenas are to be seen in almost every municipality across Canada, … These units usually are close-coupled, with the condensing unit mounted on the roof as close as possible to the evaporators to reduce the piping and refrigerant costs. font-weight:bold; All of the hazards associated with ammonia are announced loudly by its pungent odor; and that odor is so strong that even at very low non hazardous concentrations, it repels people from a contaminated area. on: function (event, callback) { Johnson Controls 2 3 Eigenschappen van Ammoniak A. Milieu-impact ODP GWP R12 CF2CL2 1 10600 R22 CHCLF2 0,055 1900 R134a CH2FCF3 0 1360 R407a Blend 0 1920 R717 NH³ 0 0 R744 CO² 0 1 (*) ODP = Ozon Depletion Potential (Ref = R11) (**) GWP = … At a -40°F (-40°C) suction, the two systems are virtually identical at 2.41 BHP per ton for the R-22 system and 2.44 BHP per ton for the ammonia system. These racks are primarily water-cooled or remotely air-cooled, but some have been evaporative condenser-cooled as well. By visiting this website, certain cookies have already been set, which you may delete and block. /* ----------------------------------------- */ CO2 refrigerant … “At higher temperatures, we were able to run a glycol chiller off of the ammonia system and use brine coils in the nut storage area. #title2 { Ammonia systems also carry other considerations. /* ----------------------------------------- */ That gives a warning sign even in case of minor ammonia … Do You Look For in a Process Cooling Equipment Supplier? But there are a … } Emerald’s Modular Technology: Saving Monies from the Start, Greener Technology for Refrigeration Plants. According to Christo van der Merwe, of MRE, (Marine and Refrigeration Engineering), Freon systems can be reasonably cost effective up to about 800 pallets. Susan Wagoner is the advertising and communications specialist for RAE Corp., Pryor, Okla., a manufacturer of Freon-based engineered cooling systems. In fact, Christo says, over the life of a refrigeration system, the initial capital cost can represent as little as 10% of the total plant operating cost. Additionally, split Freon systems - in which a single air-cooled condensing unit serves one or two evaporators with electric defrost on lower-temperature applications (see sidebar) - might provide a refrigeration bridge to later expansion and possible conversion to ammonia. Does Your Refrigeration System Offer Flexibility? You must have JavaScript enabled to enjoy a limited number of articles over the next 30 days. } #list { The overall brake horsepower (BHP) per ton (a generally regarded level of a refrigeration system’s efficiency) on an ammonia system with these characteristics is approximately 1.86, while the equivalent R-22-based system has a BHP per ton of 1.96. /* ----------------------------------------- */ A key characteristic of creating an industrial refrigeration system is the refrigerant of choice. There are times and places where Freon systems make sense and might just be the right horse for the course. /* View slug: latest-studies - start */ Let’s talk purchasing: When specifying and purchasing industrial process cooling equipment, what about an equipment supplier is the most important to you? Because they are direct-expansion systems, it is important to control head pressure to provide the pressure differential required by the expansion valve. [1] However, as a result of the dispersal of these … (function() { The question then becomes: “I’ve got an aging system. Problematic procedures may be to blame. Yes, it is different from refrigeration and air-conditioning using halocarbon refrigerants. Freon refrigerant and ammonia refrigerant which is better, more appropriate? }); While conventional Freon refrigerants are being phased out due to environmental concerns, replacement technologies collectively known as the “new Freons” can play a valuable role in modern freezer and refrigeration applications. The alternative of lowering the overall suction level 8 to 10°F (4 to 6°C) just to service a small load also would be prohibitively expensive from an energy standpoint. Government regulations with regard to PSM programs and Homeland Security issues also might affect a plant’s decision. window.mc4wp.listeners.push({ The bark is much worse … Ammonia or R717 is amongst the oldest of all the refrigerants and still used widely in the refrigeration applications. The choice of secondary refrigerant is determined by its appli… The purity of the anhydrous ammonia is vital to the properties that make it a good refrigerant. The evaporative condenser operating near the wet bulb will have a condensing pressure lower than an air-cooled unit that relies on the dry bulb temperature. The “Ammonia vs. Freon” debate is not a symmetrical one; the pressure is against ammonia, and for its replacement by halocarbon refrigerants. New Refrigerant Requirements; Emerald’s New Model with R32 A2L Refrigerant Already In Testing, Not Your Father’s Refrigeration Control System, The Cost of Maintenance for Refrigeration Plants; Now Slashed, When the Size and Noise of Your Refrigeration System Matter, Martha’s Vineyard Ice Arena – Martha’s Vineyard, MA, Cubes for Facility Upgrade or Replacement, Cubes for College Prep/Collegiate/Professional. If evaporative-cooled ammonia systems are inherently more efficient than air-cooled Freon systems, where can Freon systems play a successful role? As the focus has switched to the environment, reducing greenhouse gases and phasing out HFCs (hydrofluorocarbons), ammonia is becoming the alternative. Furthermore, if the plant is located in a crowded nonindustrial neighborhood, the owner might not be comfortable with the potential liability of an ammonia leak. /* ----------------------------------------- */ However, Freon refrigeration has been an integral part of the industry since the early 20th century. Ammonia Vs. Freon . So just what is the difference between ammonia and Freon? Small- to medium-sized Freon systems typically have a first-cost advantage. /* ----------------------------------------- */ Ice Rink Efficiency: The Proof is in the Pudding. Figure 1. R-22 and other Freon-type blends generally have higher … It’s been used for over 130 years, but it’s potential is just being realized. Posted on March 13, 2016 April 13, 2016 Author admin Categories Construction, Energy Savings, General Interest, Maintenance, Safety, Uncategorized Tags Ammonia, ammonia refrigeration, Ammonia vs Freon, Barpro Storage SA, choosing a refrigerant, cold storage, Freon, Freon refrigeration, Freon vs Ammonia, GEA Group Engineer, global warming potential, logistics … float: left; } Download & View Ammonia Vs Freon as PDF for free. Another important note is the extent to which each refrigerant contributes to global warming. Traditionally, the majority of Freon refrigeration units have been split systems. OUT WITH THE OLD & IN WITH THE NEW: FREON VS AMMONIA & GLYCOL REFRIGERATION SYSTEMS Freon refrigeration plants are frequently used in red meat processing facilities of small to medium size (i.e. By visiting this website, certain cookies have already been set, which you may delete and block. I want to hear from you. CO2 is slightly less efficient than ammonia but this difference is less noticeable at lower temperatures. The stand-alone Freon systems can easily accomplish this task with electrically defrosted coils.” water, glycol, brine. /* ----------------------------------------- */ Freon is a tradename while refrigerant is the name of a group of compounds used in heat pump cycles and refrigeration … While older Freons are considered to have a significant global warming potential (GWP), the newer refrigerants that eventually will phase out the R-22 Freon are relatively harmless to the atmosphere. However, Freon refrigeration has been an integral part of the industry since the early 20th century. Email: info@emeraldet.com, /* ----------------------------------------- */ Ammonia as a Refrigerant vs. border: 1px solid #fff; Although neither ammonia nor Freon is an ideal refrigerant, there are advantages and disadvantages to both types. } Ammonia is lighter than air (molecular weight of ammonia is 17, molecular weight of air is 28). Freon is a tradema rked bran d name of air conditioning refrigerant created by DuPont. An absorption refrigerator is a refrigerator that uses a heat source (e.g., solar energy, a fossil-fueled flame, waste heat from factories, or district heating systems) to provide the energy needed to drive the cooling process. /* ----------------------------------------- */ Cubes for Community/Municipality/Outdoor All rights reserved. since ammonia leakage accident happened a cold storage enterprises in Shanghai, after security touched the hearts of every user in order to avoid similar accidents from happening again, the domestic each big refrigerator construction enterprises have also begun ammonia refrigerants and freon refrigerant improvement work. Whether to choose an ammonia refrigerant or an alternative CFC refrigerant is an all too frequent debate. From the earliest days of CFCs and HCFCs, the ammonia refrigeration folks advocated their piece of the refrigeration. If ammonia breaks down, it converts back to nitrogen and hydrogen. When these inefficiencies are added to the system, the BHP per ton difference is much larger than just the difference in refrigerant properties. Ammonia systems traditionally have been applied with open-drive compressors and evaporative condensers, which operate near the wet bulb temperature. in facilities that have an annual production of less than 6,000 tonnes of hot standard carcass weight). The head pressure control is accomplished by either condenser fan cycling or condenser flooding. Ammonia was the biggest industrial refrigerant, while sulfur dioxide was used more in home refrigerators and small appliances,” Vantine said, adding that the use of sulfur dioxide was eventually discontinued because of its toxicity. Ammonia as a refrigerant isn’t a new concept. Ammonia (R-717) vs. CO2 (R-744) Refrigeration Systems. window.mc4wp = { The company offers a range of refrigerant options for ice rinks, including ammonia/CO 2, ammonia/glycol, CO 2 and “Freon,” which is Chemours’ trademark for a number of halocarbon refrigerants. /* View slug: cs-sidebar-college-prep - end */ By closing this message or continuing to use our site, you agree to the use of cookies. Ammonia also is toxic, but it is controllable, and its distinct odor makes it “self-alarming” if any leaks occur. Refrigeration & Mechanical Services are capable of installing either type of chiller. Ammonia is safe for the environment; Ammonia based refrigeration systems cost less build and install More details. This article was corrected on February 26, 2013. At the same time, unlike most other refrigerants, it has a characteristic odor that can be detected by humans even at very low concentrations. This article was corrected on February 26, 2013. /* ----------------------------------------- */ Ammonia vs Freon refrigeration systems - comparison July 2016 With a major move towards natural refrigerants coming into effect around the world we at Lutz Refrigeration see the trend for the future moving towards Ammonia for large scale cold storage and gradually towards the medium sized and eventually smaller rooms. })(); Phone: 888-530-7713 forms : { /* ----------------------------------------- */ Equipment Investment In general, initial investment of large and medium-sized ammonia refrigeration system is slightly higher compared with the same scale of freon refrigeration system. /* ----------------------------------------- */, community/municipal/outdoor, upgrade project, or collegiate rink, Brine Vs Glycol: It Comes Down to Long Term Vision, Cold Floor Design: The Ice Kube VS the new ice, Decoupler Blender: Saving Money with Better Control. It is not uncommon that R404A leakages from a plant become noticeable only when most of the charge is lost, because it is odorless, with … } Visit our updated, This website requires certain cookies to work and uses other cookies to help you have the best experience. font-size: 12px; All of the hazards associated with ammonia are announced loudly by its pungent odor; and that odor is so strong that even at very low non hazardous concentrations, it repels people from a contaminated area. Last month, a 5000 pound ammonia leak occurred at a Boston-area seafood warehouse that killed one worker and forced a shelter-in-place order from Boston Police. It is also the only refrigerant outside the halocarbons group. From a pure theoretical standpoint, CO2 is slightly less efficient than ammonia, but this difference decreases as the evaporator temperature drops. padding: 1px; Ammonia Vs Freon? March 1, 2013 By Mathieu Courchesne, ing., Dessau. 2. 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