Freon can provide an alternative in both air-cooled and evaporative condenser systems. Industrial refrigeration system basics – Ammonia refrigerant. Although some Freon systems use open-drive compressors and evaporative condensers, most Freon systems use hermetic or semihermetic compressors and air-cooled condensing. On larger jobs, a number of condensing units might be spread across the roof. Additionally, some states severely restrict the application of ammonia systems. For each project, CIMCO looks at initial cost, energy consumption and maintenance, and … The stand-alone Freon systems can easily accomplish this task with electrically defrosted coils.” 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. All rights reserved. Ammonia as a refrigerant isn’t a new concept. 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. It’s been used for over 130 years, but it’s potential is just being realized. 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. #list { Ammonia Vs. Freon . The purity of the anhydrous ammonia is vital to the properties that make it a good refrigerant. font-weight:bold; Visit our updated. This application would be a good place to integrate a small, stand-alone, air-cooled Freon system. 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. Freon is useful as refrigerants and aerosol propellants while refrigerants are useful in heat pump cycles and refrigeration cycle. 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. While Freon is less efficient than ammonia on a BTU per pound basis, Freon refrigerants are not nearly as inefficient as assumed. /* View slug: latest-studies - end */ Although neither ammonia nor Freon is an ideal refrigerant, there are advantages and disadvantages to both types. The main difference in the perception of Freon vs. ammonia systems has as much to do with the systems as the refrigerants themselves. /* View slug: cs-sidebar-college-prep - start */ However, Freon refrigeration has been an integral part of the industry since the early 20th century. When these inefficiencies are added to the system, the BHP per ton difference is much larger than just the difference in refrigerant properties. By closing this message or continuing to use our site, you agree to the use of cookies. Cubes for Facility Upgrade or Replacement Small- to medium-sized Freon systems typically have a first-cost advantage. line-height: 125%; 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. 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. CO2 is slightly less efficient than ammonia but this difference is less noticeable at lower temperatures. By closing this message or continuing to use our site, you agree to the use of cookies. Chillers using both refrigerants : ammonia and R134a. 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. I want to hear from you. font-weight: bold; } Because they are direct-expansion systems, it is important to control head pressure to provide the pressure differential required by the expansion valve. Ammonia refrigerants are less expensive initially, but they come with the risk of a toxic chemical leak. CO2 refrigerant … Ammonia (R-717) vs. CO2 (R-744) Refrigeration Systems. However, Freon refrigeration has been an integral part of the industry since the early 20th century. The bark is much worse … /* ----------------------------------------- */ Ammonia Vs Freon? Pros and Cons of Ammonia. 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. CO2 efficiency vs. ammonia efficiency. While ammonia will always have a preeminent place in the industrial refrigeration market, “one size” never fits all. /* View slug: cs-sidebar-community - start */ margin: 0 0 .5em 3em; Ammonia, a combination of nitrogen and hydrogen, is a natural substance and is not considered a threat to the atmosphere. 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 … But because CO2 is a very dense gas, the size of the equipment needed to provide the same refrigeration effect is significantly smaller. on: function (event, callback) { Emerald’s Modular Technology: Saving Monies from the Start, Greener Technology for Refrigeration Plants. Packaging the systems together would lower field labor and provide more of a single-sourced solution while reducing mechanical room requirements. 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 food and beverage business has been dominated by ammonia as a refrigerant. This article was corrected on February 26, 2013. Ammonia is also already being used in large heat pump … /* ----------------------------------------- */ • Characteristics of Ammonia • Chillers using both refrigerants with their pro’s • Examples of installations • Conclusion . It has become so common, that we often call ALL brands of refrigerant Freon, even … body { 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 … You must have JavaScript enabled to enjoy a limited number of articles over the next 30 days. 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. 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 also is toxic, but it is controllable, and its distinct odor makes it “self-alarming” if any leaks occur. /* ----------------------------------------- */ 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?" 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. 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. Ammonia is safe for the environment; Ammonia based refrigeration systems cost less build and install By visiting this website, certain cookies have already been set, which you may delete and block. 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. Design, CMS, Hosting & Web Development :: ePublishing. ul, ol { Refrigerants: Ammonia vs CO2. /* ----------------------------------------- */ #featurepic { This article was corrected on February 26, 2013. “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. /* View slug: latest-studies - start */ margin: 0% 2% 2% 0%; 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 = … } margin: 0% 0% 0% 0%; If ammonia breaks down, it converts back to nitrogen and hydrogen. 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. callback: callback .list, #list {font-size:12px;} Do You Look For in a Process Cooling Equipment Supplier? Depending on the conditions of the air or process (e.g. 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). How Long Will Our Refrigeration System Last? That gives a warning sign even in case of minor ammonia … temperature), a variety of secondary refrigerants can be used, e.g. 1. listeners: [], Freon refrigerant and ammonia refrigerant which is better, more appropriate? [1] However, as a result of the dispersal of these … 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 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. At the same time, unlike most other refrigerants, it has a characteristic odor that can be detected by humans even at very low concentrations. More details. From a pure theoretical standpoint, CO2 is slightly less efficient than ammonia, but this difference decreases as the evaporator temperature drops. 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. line-height: 1.6; The head pressure control is accomplished by either condenser fan cycling or condenser flooding. The short answer is: all Freon is refrigerant, but not all refrigerants are Freon. Examples for Freon include chlorofluorocarbons (CFCs) and Hydrochlorofluorocarbons (HCFCs) while examples for refrigerants are ammonia, sulfur dioxide, carbon dioxide, etc. Freon is a man-made refrigerant that was developed as an alternative to both sulfur dioxide and ammonia. Its chemical formula is NH3. border: 1px solid #fff; Summary – Freon vs Refrigerant. But there are a … Ammonia is a toxic refrigerant, and it is also flammable at certain concentrations. Operation cost The price of ammonia is lower, the refrigerating capacity per unit is higher, and the power consumption is lower. 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. 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 an… } Copyright ©2021. /* ----------------------------------------- */ Freon is a tradename while refrigerant is the name of a group of compounds used in heat pump cycles and refrigeration … Plants that have more than 10,000 lb of ammonia on site must have a process safety management (PSM) program. After that, ammonia becomes increasingly attractive. 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. The following information has been . Susan Wagoner is the advertising and communications specialist for RAE Corp., Pryor, Okla., a manufacturer of Freon-based engineered cooling systems. } Ammonia is lighter than air (molecular weight of ammonia is 17, molecular weight of air is 28). } padding: 0; 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. 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. })(); Phone: 888-530-7713 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. Cubes for College Prep/Collegiate/Professional. /* View slug: cs-sidebar-facility - start */ If evaporative-cooled ammonia systems are inherently more efficient than air-cooled Freon systems, where can Freon systems play a successful role? Download & View Ammonia Vs Freon as PDF for free. The “Ammonia vs. Freon” debate is not a symmetrical one; the pressure is against ammonia, and for its replacement by halocarbon refrigerants. NH= Corrosief en tast Cu aan! Ammonia refrigeration works much like Industrial Refrigeration systems using synthetic refrigerants, with the major exception being that it uses anhydrous ammonia as the refrigerant. Visit our updated, This website requires certain cookies to work and uses other cookies to help you have the best experience. /* ----------------------------------------- */ } Ammonia or R717 is amongst the oldest of all the refrigerants and still used widely in the refrigeration applications. (function() { R-22 and other Freon-type blends generally have higher … March 1, 2013 By Mathieu Courchesne, ing., Dessau. According to Christo van der Merwe, of MRE, (Marine and Refrigeration Engineering), Freon systems can be reasonably cost effective up to about 800 pallets. By visiting this website, certain cookies have already been set, which you may delete and block. Refrigerant grade anhydrous ammonia is a clear, colorless gas or liquid and about 99.95% pure. #catg {color:#656565;font-size:12px;} This website requires certain cookies to work and uses other cookies to help you have the best experience. Meanwhile, the operator or operating board is simply looking for the best solution to their maintenance, upgrade, and cost concerns. 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. Please click here to continue without javascript.. 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. During the following century, chlorofluorocarbons and hydro chlorofluorocarbons have replaced some of these elements and have seen heavy use. So just what is the difference between ammonia and Freon? For webinar sponsorship information, visit www.bnpevents.com/webinars or email webinars@bnpmedia.com. 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. 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. Ammonia as a Refrigerant vs. margin: 12px 0px 12px 0px; Whether to choose an ammonia refrigerant or an alternative CFC refrigerant is an all too frequent debate. The bark is much worse … Farewell Freon…or maybe not. 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. clear: both; A key characteristic of creating an industrial refrigeration system is the refrigerant of choice. Ammonia systems traditionally have been applied with open-drive compressors and evaporative condensers, which operate near the wet bulb temperature. Another important note is the extent to which each refrigerant contributes to global warming. Figure 1. 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 … Buildings Environmental Building Mechanical & Electrical (HVAC) Systems Energy Efficiency/Conservation Environment. The choice of secondary refrigerant is determined by its appli… 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. Arenas are to be seen in almost every municipality across Canada, … /* View slug: cs-sidebar-college-prep - end */ margin: 0 0 1em; Yes, it is different from refrigeration and air-conditioning using halocarbon refrigerants. The food and beverage business has been dominated by ammonia as a refrigerant. While refrigerants are often collectively referred to as “Freon,” Freon is actually the name of one specific brand of refrigerant. 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. 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. 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 … And provide more of a toxic chemical leak lower temperatures inherently more efficient than air-cooled Freon systems play successful! Unit is higher, and cost concerns Modular Technology: Saving Monies from the,... While ammonia will always have a “ rack ” system with multiple reciprocating compressors on suction. From refrigeration and air-conditioning using halocarbon refrigerants can Freon systems, it is from! 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