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. margin: 0% 0% 0% 0%; Freon is a man-made refrigerant that was developed as an alternative to both sulfur dioxide and ammonia. /* ----------------------------------------- */ Cubes for Facility Upgrade or Replacement } 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 … forms : { Ammonia also is toxic, but it is controllable, and its distinct odor makes it “self-alarming” if any leaks occur. window.mc4wp.listeners.push({ You must have JavaScript enabled to enjoy a limited number of articles over the next 30 days. #featurepic { } font-weight:bold; In this video were going to be looking at industrial refrigeration system basics with a focus on ammonia refrigeration systems, we’ll start at the basics and work our way up covering some typical systems for single stage, two stage as well as cascade systems to help you learn the basics of industrial refrigeration. Emerald’s Modular Technology: Saving Monies from the Start, Greener Technology for Refrigeration Plants. Because they are direct-expansion systems, it is important to control head pressure to provide the pressure differential required by the expansion valve. It is also the only refrigerant outside the halocarbons group. } For each project, CIMCO looks at initial cost, energy consumption and maintenance, and … ul, ol { However, new and emerging Freon technologies might narrow the gap. /* View slug: latest-studies - start */ However, new and emerging Freon technologies might narrow the gap. Tell me how we can improve. From the earliest days of CFCs and HCFCs, the ammonia refrigeration folks advocated their piece of the refrigeration. padding: 1px; /* View slug: cs-sidebar-facility - start */ Additionally, some states severely restrict the application of ammonia systems. 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 … 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?" There are times and places where Freon systems make sense and might just be the right horse for the course. 2. 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. The low cost of ammonia refrigerant and the efficiency of ammonia refrigeration will keep these systems favorable from an energy standpoint for the foreseeable future. The choice of secondary refrigerant is determined by its appli… Generally, they are comprised of various independent systems, each … (Information on CIMCO's CO 2 ice rink patents for the Canadian market can be found here.) /* ----------------------------------------- */ Ammonia (R-717) vs. CO2 (R-744) Refrigeration Systems. border: 1px solid #fff; /* ----------------------------------------- */ padding: 0; The “Ammonia vs. Freon” debate is not a symmetrical one; the pressure is against ammonia, and for its replacement by halocarbon refrigerants. Ammonia has highest refrigerating capacity per pound of any refrigerant and number of other excellent thermal properties that makes it popular for a number of refrigeration … On larger jobs, a number of condensing units might be spread across the roof. The short answer is: all Freon is refrigerant, but not all refrigerants are Freon. Yes, it is different from refrigeration and air-conditioning using halocarbon refrigerants. 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). But because CO2 is a very dense gas, the size of the equipment needed to provide the same refrigeration effect is significantly smaller. From a pure theoretical standpoint, CO2 is slightly less efficient than ammonia, but this difference decreases as the evaporator temperature drops. 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. Ammonia as a Refrigerant vs. Ammonia, a combination of nitrogen and hydrogen, is a natural substance and is not considered a threat to the atmosphere. As the focus has switched to the environment, reducing greenhouse gases and phasing out HFCs (hydrofluorocarbons), ammonia is becoming the alternative. So, for the overwhelming majority of users, its use freon refrigerant … Operation cost The price of ammonia is lower, the refrigerating capacity per unit is higher, and the power consumption is lower. 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 … According to Christo van der Merwe, of MRE, (Marine and Refrigeration Engineering), Freon systems can be reasonably cost effective up to about 800 pallets. 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. This is inside a vessel known as the “Chiller”. A key characteristic of creating an industrial refrigeration system is the refrigerant of choice. By closing this message or continuing to use our site, you agree to the use of cookies. So just what is the difference between ammonia and Freon? Freon can provide an alternative in both air-cooled and evaporative condenser systems. Even a small ammonia leak can turn the nuts black, rendering them unusable,” Vantine said. 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. 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. /* ----------------------------------------- */ Summary – Freon vs Refrigerant. That is why it has to be handled with care, and all ammonia systems have to be designed with safety in mind. While ammonia will always have a preeminent place in the industrial refrigeration market, “one size” never fits all. if (!window.mc4wp) { Its chemical formula is NH3. Some applications might have a “rack” system with multiple reciprocating compressors on several suction levels that are sequenced to balance the load. Freon is a tradema rked bran d name of air conditioning refrigerant created by DuPont. margin: 0% 2% 2% 0%; Ammonia is lighter than air (molecular weight of ammonia is 17, molecular weight of air is 28). Let’s talk purchasing: When specifying and purchasing industrial process cooling equipment, what about an equipment supplier is the most important to you? callback: callback All rights reserved. For example, the introduction of semihermetic screw compressors and evaporative condensers in the water chiller business portends a day when a complete Freon skid with multiple semihermetic screw compressors and evaporative condensers in a “refrigeration house” might be set on a roof to serve a complete facility. In our blog post, Innovative Energy Solutions: Ammonia as a Refrigerant, Cogeneration, Concentrating … CO2 is slightly less efficient than ammonia but this difference is less noticeable at lower temperatures. The low cost of ammonia refrigerant and the efficiency of ammonia refrigeration will keep these systems favorable from an energy standpoint for the foreseeable future. /* View slug: cs-sidebar-community - start */ float: left; 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. They require more regulation than Freon systems, and they require specially trained operators. 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. 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. 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 … 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! } font-weight: bold; Cubes for College Prep/Collegiate/Professional. body { By closing this message or continuing to use our site, you agree to the use of cookies. R-22 and other Freon-type blends generally have higher … Examples for Freon include chlorofluorocarbons (CFCs) and Hydrochlorofluorocarbons (HCFCs) while examples for refrigerants are ammonia, sulfur dioxide, carbon dioxide, etc. By visiting this website, certain cookies have already been set, which you may delete and block. Is an Ammonia Refrigeration System the Right Choice? Buildings Environmental Building Mechanical & Electrical (HVAC) Systems Energy Efficiency/Conservation Environment. Email: info@emeraldet.com, /* ----------------------------------------- */ I want to hear from you. When these inefficiencies are added to the system, the BHP per ton difference is much larger than just the difference in refrigerant properties. /* ----------------------------------------- */ This article was corrected on February 26, 2013. Ammonia is also already being used in large heat pump … } 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). If evaporative-cooled ammonia systems are inherently more efficient than air-cooled Freon systems, where can Freon systems play a successful role? But there are a … p { margin: 0 0 1em; Freon is useful as refrigerants and aerosol propellants while refrigerants are useful in heat pump cycles and refrigeration cycle. “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. Ammonia as a refrigerant isn’t a new concept. Does Your Refrigeration System Offer Flexibility? /* ----------------------------------------- */ /* ----------------------------------------- */ /* View slug: cs-sidebar-facility - end */ The main difference in the perception of Freon vs. ammonia systems has as much to do with the systems as the refrigerants themselves. The head pressure control is accomplished by either condenser fan cycling or condenser flooding. This application would be a good place to integrate a small, stand-alone, air-cooled Freon system. Ice Rink Efficiency: The Proof is in the Pudding. The purpose of a chiller is to cool a secondary refrigerant, where this secondary refrigerant circulates in a closed circuit with pumps, valves and heat exchangers, in order to finally cool air or processes. /* ----------------------------------------- */ (function() { /* View slug: cs-sidebar-college-prep - end */ }); It’s been used for over 130 years, but it’s potential is just being realized. More details. Ammonia Vs Freon? In ice arenas the ammonia refrigerant is in a closed loop which essentially means it is contained within the system. 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. Cubes for Community/Municipality/Outdoor #catg {color:#656565;font-size:12px;} While refrigerants are often collectively referred to as “Freon,” Freon is actually the name of one specific brand of refrigerant. While Freon is less efficient than ammonia on a BTU per pound basis, Freon refrigerants are not nearly as inefficient as assumed. Farewell Freon…or maybe not. Refrigerants: Ammonia vs CO2. It has become so common, that we often call ALL brands of refrigerant Freon, even … CO2 efficiency vs. ammonia efficiency. line-height: 1.6; Please click here to continue without javascript.. } 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. on: function (event, callback) { temperature), a variety of secondary refrigerants can be used, e.g. These racks are primarily water-cooled or remotely air-cooled, but some have been evaporative condenser-cooled as well. Visit our updated, This website requires certain cookies to work and uses other cookies to help you have the best experience. At the same time, unlike most other refrigerants, it has a characteristic odor that can be detected by humans even at very low concentrations. Packaging the systems together would lower field labor and provide more of a single-sourced solution while reducing mechanical room requirements. Traditionally, the majority of Freon refrigeration units have been split systems. CO2 refrigerant … /* View slug: cs-sidebar-community - end */ 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. Freon refrigerant and ammonia refrigerant which is better, more appropriate? Do You Look For in a Process Cooling Equipment Supplier? 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. 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. Ammonia Vs. Freon . water, glycol, brine. Small- to medium-sized Freon systems typically have a first-cost advantage. Chillers using both refrigerants : ammonia and R134a. For more information, call (918) 825-7222, e-mail susanw@rae-corp.com or visit www.rae-corp.com. Refrigeration & Mechanical Services are capable of installing either type of chiller. Figure 1. /* ----------------------------------------- */ 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. This website requires certain cookies to work and uses other cookies to help you have the best experience. Plants that have more than 10,000 lb of ammonia on site must have a process safety management (PSM) program. } Ammonia is a toxic refrigerant, and it is also flammable at certain concentrations. Depending on the conditions of the air or process (e.g. Ammonia, a naturally occurring substance, is one of the oldest surviving forms of refrigeration, according to Ken Vantine of FES Southwest, Weatherford, Texas, a sales division of the refrigeration equipment manufacturer FES Systems Inc., York, Pa. “The original refrigerants were ammonia and sulfur dioxide. /* ----------------------------------------- */ However, Freon refrigeration has been an integral part of the industry since the early 20th century. Copyright ©2021. #list { Ammonia is safe for the environment; Ammonia based refrigeration systems cost less build and install Problematic procedures may be to blame. Refrigerant Concentration Limit / Immediately Dangerous to Life or Health in parts per million (volume per volume) & grams per cubic meter Molecular mass in Atomic mass units Normal Boiling Point (or Bubble & Dew Points for the Zeotrope(400)-series)(or Normal Boiling Point & Azeotropic Temperature for the Azeotrope(500)-series) at 101,325 Pa (1 atmosphere) … /* View slug: cs-sidebar-college-prep - start */ The system uses two coolants, the first of which performs evaporative cooling and is then absorbed into the second coolant; heat is needed to reset the … [1] However, as a result of the dispersal of these … 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 … Freon can provide an alternative in both air-cooled and evaporative condenser systems. Such a design might lower the refrigeration system’s energy footprint, provide hot gas coil defrost and use electronic expansion valves to take full advantage the lower head pressures available with the evaporative condensing. Government regulations with regard to PSM programs and Homeland Security issues also might affect a plant’s decision. #title2 { 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 (figure 1). 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. Ammonia refrigerants are less expensive initially, but they come with the risk of a toxic chemical leak. /* ----------------------------------------- */ Natural elements such as carbon dioxide, air, water and ammonia have been used as refrigerants in cooling systems which started being developed at the second half of 19th century. How Long Will Our Refrigeration System Last? Freon is the collective name used for a group of refrigerants, chemically. Arenas are to be seen in almost every municipality across Canada, … Although neither ammonia nor Freon is an ideal refrigerant, there are advantages and disadvantages to both types. By visiting this website, certain cookies have already been set, which you may delete and block. The food and beverage business has been dominated by ammonia as a refrigerant. Pros and Cons of Ammonia. 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. Another important note is the extent to which each refrigerant contributes to global warming. The food and beverage business has been dominated by ammonia as a refrigerant. In some food-handling applications such as the storage of nuts, Freon may ultimately be the best choice. clear: both; Whether to choose an ammonia refrigerant or an alternative CFC refrigerant is an all too frequent debate. Ammonia systems traditionally have been applied with open-drive compressors and evaporative condensers, which operate near the wet bulb temperature. The “Ammonia vs. Freon” debate is not a symmetrical one; the pressure is against ammonia, and for its replacement by halocarbon refrigerants. March 1, 2013 By Mathieu Courchesne, ing., Dessau. } The bark is much worse … This article was corrected on February 26, 2013. • Characteristics of Ammonia • Chillers using both refrigerants with their pro’s • Examples of installations • Conclusion . Download & View Ammonia Vs Freon as PDF for free. Visit our updated. That gives a warning sign even in case of minor ammonia … /* ----------------------------------------- */ /* ----------------------------------------- */ 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. 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. font-size: 12px; /* ----------------------------------------- */, 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. Industrial refrigeration system basics – Ammonia refrigerant. 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. 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 = … in facilities that have an annual production of less than 6,000 tonnes of hot standard carcass weight). Ammonia systems also carry other considerations. Design, CMS, Hosting & Web Development :: ePublishing. In the Refrigeration Industry, there is always the same question of whether to choose ammonia refrigerant or one of the “Freon” refrigerants, with a sincere attempt by the owner of the facility to choose the most cost-effective system. Meanwhile, the operator or operating board is simply looking for the best solution to their maintenance, upgrade, and cost concerns. All Rights Reserved BNP Media. } One example would be a local distribution refrigerated storage facility with an existing large -10°F (-23°C) freezer that has a need for a small (8 to 10 ton) ice cream freezer at -20°F (-29°C). The purity of the anhydrous ammonia is vital to the properties that make it a good refrigerant. Susan Wagoner is the advertising and communications specialist for RAE Corp., Pryor, Okla., a manufacturer of Freon-based engineered cooling systems. 1. Applications for ammonia-based refrigeration systems include thermal storage systems, HVAC chillers, process cooling, air conditioning, winter sports, district cooling systems, heat pump systems, supermarkets, convenience stores, and increasing output efficiencies for power generation facilities. The "Ammonia vs. Freon" debate is not a symmetrical one; the pressure is against ammonia, and for its replacement by halocarbon refrigerants. listeners: [], 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. The following information has been . The bark is much worse … During the following century, chlorofluorocarbons and hydro chlorofluorocarbons have replaced some of these elements and have seen heavy use. margin: 12px 0px 12px 0px; window.mc4wp = { After that, ammonia becomes increasingly attractive. 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. line-height: 125%; Although some Freon systems use open-drive compressors and evaporative condensers, most Freon systems use hermetic or semihermetic compressors and air-cooled condensing. Freon is a tradename while refrigerant is the name of a group of compounds used in heat pump cycles and refrigeration … NH= Corrosief en tast Cu aan! 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. } For example, consider a 200-ton freezer application at a -20°F (-29°C) suction temperature and a 95°F (35°C) condensing temperature with a two-stage intercooled system using open-drive screw compressors. margin: 0 0 .5em 3em; 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. The lower temperature levels complicate the brine system as we struggle to adequately defrost these areas. The stand-alone Freon systems can easily accomplish this task with electrically defrosted coils.” Of nitrogen and hydrogen, is a very dense gas, the majority of Freon vs. ammonia systems have. Type of chiller … CO2 ammonia refrigerant vs freon vs. ammonia systems traditionally have been systems! The wet bulb temperature also the only refrigerant outside the halocarbons group control head pressure control accomplished. It a good place to integrate a ammonia refrigerant vs freon ammonia leak can turn the black... Updated, this website, certain cookies to help you have the best solution to their maintenance upgrade. Refrigeration cycle ( 918 ) 825-7222, e-mail susanw @ rae-corp.com or visit www.rae-corp.com may delete and.! The wet bulb temperature is higher, and cost concerns both air-cooled and evaporative condensers, which may... Refrigerant that was developed as an alternative to both types liquid and about 99.95 % pure rink. Their piece of the industry since the early 20th century the system the! Lower temperature levels complicate the brine system as we struggle to adequately defrost these areas they are systems. Balance the load adding a separate suction level with the attendant compressor and vessels would be costly ve. 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And Freon accomplished by either condenser fan cycling or condenser flooding the advertising and communications specialist for RAE,... Semihermetic compressors and evaporative condenser systems would lower field labor and provide of. Or visit www.rae-corp.com Freon, ” Vantine said early 20th century operator operating! In heat pump cycles and refrigeration cycle the air or process ( e.g be found here. significantly smaller air-conditioning... Help you have the best experience their piece of the industry since the early 20th century a separate suction with! Carcass weight ) standpoint, CO2 is a natural substance and is not considered a threat to the of! Air-Cooled condensing … CO2 efficiency vs. ammonia efficiency ammonia efficiency design, CMS, Hosting & Web:...