Although some Freon systems use open-drive compressors and evaporative condensers, most Freon systems use hermetic or semihermetic compressors and air-cooled condensing. Ammonia Vs. Freon . As the focus has switched to the environment, reducing greenhouse gases and phasing out HFCs (hydrofluorocarbons), ammonia is becoming the alternative. Ammonia Vs Freon? Please click here to continue without javascript.. Cubes for Facility Upgrade or Replacement font-size: 12px; } March 1, 2013 By Mathieu Courchesne, ing., Dessau. Download & View Ammonia Vs Freon as PDF for free. Ammonia is lighter than air (molecular weight of ammonia is 17, molecular weight of air is 28). I want to hear from you. From a pure theoretical standpoint, CO2 is slightly less efficient than ammonia, but this difference decreases as the evaporator temperature drops. Industrial refrigeration system basics – Ammonia refrigerant. 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. 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 … Cubes for College Prep/Collegiate/Professional. water, glycol, brine. On larger jobs, a number of condensing units might be spread across the roof. 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. 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 question then becomes: “I’ve got an aging system. Ammonia as a refrigerant isn’t a new concept. Traditionally, the majority of Freon refrigeration units have been split systems. The bark is much worse … Freon can provide an alternative in both air-cooled and evaporative condenser systems. Ammonia is a toxic refrigerant, and it is also flammable at certain concentrations. #title2 { Small- to medium-sized Freon systems typically have a first-cost advantage. That gives a warning sign even in case of minor ammonia … 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. In ice arenas the ammonia refrigerant is in a closed loop which essentially means it is contained within the system. border: 1px solid #fff; Buildings Environmental Building Mechanical & Electrical (HVAC) Systems Energy Efficiency/Conservation Environment. 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). Some applications might have a “rack” system with multiple reciprocating compressors on several suction levels that are sequenced to balance the load. Freon refrigerant and ammonia refrigerant which is better, more appropriate? 1. The following information has been . It’s been used for over 130 years, but it’s potential is just being realized. However, Freon refrigeration has been an integral part of the industry since the early 20th century. CO2 refrigerant … Summary – Freon vs Refrigerant. 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. Ammonia systems also carry other considerations. 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. /* ----------------------------------------- */, 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. Arenas are to be seen in almost every municipality across Canada, … 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 - start */ This application would be a good place to integrate a small, stand-alone, air-cooled Freon system. 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. body { Additionally, some states severely restrict the application of ammonia systems. While Freon is less efficient than ammonia on a BTU per pound basis, Freon refrigerants are not nearly as inefficient as assumed. /* ----------------------------------------- */ /* ----------------------------------------- */ Ammonia refrigerants are less expensive initially, but they come with the risk of a toxic chemical leak. 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. margin: 0% 2% 2% 0%; /* ----------------------------------------- */ 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. 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) … But because CO2 is a very dense gas, the size of the equipment needed to provide the same refrigeration effect is significantly smaller. “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. } Freon is a tradename while refrigerant is the name of a group of compounds used in heat pump cycles and refrigeration … 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. Ammonia also is toxic, but it is controllable, and its distinct odor makes it “self-alarming” if any leaks occur. 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. Freon is useful as refrigerants and aerosol propellants while refrigerants are useful in heat pump cycles and refrigeration cycle. (Information on CIMCO's CO 2 ice rink patents for the Canadian market can be found here.) Although neither ammonia nor Freon is an ideal refrigerant, there are advantages and disadvantages to both types. if (!window.mc4wp) { 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. padding: 1px; If ammonia breaks down, it converts back to nitrogen and hydrogen. After that, ammonia becomes increasingly attractive. 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). 2. /* View slug: latest-studies - end */ All rights reserved. So just what is the difference between ammonia and Freon? }); margin: 0% 0% 0% 0%; 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. There are times and places where Freon systems make sense and might just be the right horse for the course. Operation cost The price of ammonia is lower, the refrigerating capacity per unit is higher, and the power consumption is lower. Refrigerant grade anhydrous ammonia is a clear, colorless gas or liquid and about 99.95% pure. 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. 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 … line-height: 125%; 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. forms : { #list { line-height: 1.6; In our blog post, Innovative Energy Solutions: Ammonia as a Refrigerant, Cogeneration, Concentrating … /* ----------------------------------------- */ /* ----------------------------------------- */ } 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?" p { on: function (event, callback) { 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… Farewell Freon…or maybe not. 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 … 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. But there are a … /* View slug: latest-studies - start */ /* ----------------------------------------- */ Whether to choose an ammonia refrigerant or an alternative CFC refrigerant is an all too frequent debate. Are often collectively referred to as “ Freon, ” Freon is less efficient than ammonia, a variety secondary! To their maintenance, upgrade, and its distinct odor makes it self-alarming! Refrigerant is an all too frequent debate some food-handling applications such as the “ chiller ” Cubes! Or continuing to use our site, you agree to the use of cookies regulations with regard PSM... 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