The ammonia is the chemical that is used to absorb the heat from one area, and bring it to another area to dissipate. Ammonia is inherently safe and very efficient; thus, it is here for the long run! This is why ammonia is used in refrigeration systems. Ammonia is a toxic refrigerant, and it is also flammable at certain concentrations. It belongs to the group of so called “natural” refrigerants, and it has both GWP (Global Warming Potential) and … Ammonia is also used as a refrigerant gas, although not so much in modern refrigerators. It has an ozone depletion rating of zero and a global warming potential of less than 1. I just want to very briefly touch on why we use ammonia as a refrigerant. it carries much more heat per pound than most other refrigerants, around twice … The above gases mentioned are common refrigerant. Ammonia, used on the high stage, is completely contained in the machine room. The Internal ATCS uses water. Why then do we not use it as a refrigerant but instead use other substances like ammonia, carbon dioxide, and sulfur dioxide. The consequences to the outer environment of massive releases of refrigerant could not be foreseen in those days. In fact, ammonia is often sprayed on fields as a fertilizer in industrial farming. Unlike synthetic refrigerants like CFCs, it doesnt damage the ozone layer. It condenses at pressures that are relatively low too. In case it is necessary to reduce ammonia charge, combination of ammonia and CO2 (as cascade or as brine) could be a good and efficient option. Ammonia is used as refrigerant prominently in the refrigeration systems of food industry like dairies, ice creams plants, frozen food production plants, cold storage warehouses, processors of fish, poultry and meat and number of other applications. It, therefore, cannot be used with copper pipes and in high concentrations, ammonia is poisonous. It belongs to the group of so called “natural” refrigerants, and it has both GWP (Global Warming Potential) and ODP (Ozone Depletion Potential) equal to zero. Even HCFC’s are also to be phased out and Europe has taken the lead. (Editor’s note: The Just Venting blogging team identified the top three Just Venting blog posts since launching in 2008. There is one more step before you're subscribed. That gives a warning sign even in case of minor ammonia leakages. Ammonia occurs naturally in the environment, it’s available in abundant amounts. In our business, it is also excellent in refrigeration because of its chemical cooling properties. According to Professor William F. Stoecker, an expert on industrial refrigeration, the benefits of ammonia over freon are that it’s cheaper and more energy efficient, it tolerates water contamination better than other refrigerants and it absorbs large amounts of heat during evaporation. Ammonia in Industrial/Manufacturing Uses. Manfred Hofmann, expert and head of dka training at ENGIE Refrigeration, says: “NH3, or R717, is one of only a few climate-neutral refrigerants, in that it neither damages the ozone layer nor contributes to the greenhouse effect. The reason is that it is far more efficient in comparison to the competitive refrigerants. “CFC” refrigerants were promoted as safety refrigerants, resulting in an accelerating demand and CFC’s success. It is highly volatile. Ammonia As a Refrigerant: Pros and Cons Part 2 | Just Venting | HVAC Information, […] is the original post: Ammonia As a Refrigerant: Pros and Cons Part 2 | Just Venting ← Getting The Proper Care For The Equipment For Heating And Air … Portable Air […]. The institute claims ammonia has an “ozone depletion potential (ODP) of zero and a global warming potential (GWP) of zero.” Ammonia’s thermal properties mean it uses less energy than other refrigerant options in large industrial applications. This advantage is even multiplied by the fact that ammonia has a lower density in liquid phase. The purity of the anhydrous ammonia is vital to the properties that make it a good refrigerant. Ammonia refrigeration systems are used extensively in large cold storage warehouses for medium-temperature to low-temperature applications where deep freezing is necessary to freeze food products and other products that need to be frozen to keep it from spoiling or going bad. For industrial applications, this is an excellent solution. We have the answer! These gases are called refrigerant gases. Several publications have been made available as part of the ‘Improving Cold Storage Equipment in Europe’ (ICE-E) project deliverables. Ammonia is a very useful chemical and widely used around the world. Ammonia refrigeration systems are, as the name implies, a system of refrigeration that uses ammonia. Ammonia was first commercially produced in the United States about 1880 as a distillation by-product of coal processing to produce coke and coal gas. Please check your inbox for a confirmation email from Goodway and please click the link. Why Ammonia Refrigeration? It is also the only refrigerant outside the halocarbons group, still being used to a great extent. Ammonia is not a universal refrigerant, and mainly suitable for industrial and heavy commercial applications. Ammonia breaks down in the environment very quickly (lasting less than a week in the air). Liquid and gas ammonia expand and contract with changes in pressure and temperature. It is a common nitrogenous waste, particularly among aquatic organisms, and it contributes significantly to the nutritional needs of terrestrial organisms by serving as a precursor to food and fertilizers. Ammonia is used as a refrigerant because. He explains that the ongoing challenge is to create environmentally safer products without affecting quality or operation efficiency. But you might be asking yourself why we use this, as ammonia to many people conjures up a horrible smelling gas. The concern of toxicity is lessened by developing new technology. In very large cooling systems, like those in food processing facilities, ammonia is a common choice of refrigerant. Because of fear, and ignorance of the nature of ammonia, as a chemical, and as a refrigerant. When liquid ammonia vapourises it absorbs heat from the surrounding. The use of ammonia as a refrigerant is relatively safe. Next week, we will share with you another top post in the “Top Three Just Venting Blog Posts” series. Ammonia is used as a refrigerant because. It has remained the main refrigerant used in industrial refrigeration systems because of its superior thermodynamic properties and low cost. Development of CFC’s (Chlorofluorocarbons) in USA, in 1920s swung the pendulum in favor of these refrigerants, as compared to all other refrigerants used in those days, CFC’s were considered harmless and extremely stable chemicals. We have used ammonia for a long time here at EJM in the refrigeration systems we use. Due to success of CFC’s, Ammonia came under heavy pressure, but held its position, especially in large industrial installations and food preservation. NH3/CO2 cascaded is extremely efficient for low and very low temperature applications (below -40’C), while NH3/CO2 brine systems are around 20% more efficient than traditional brines. Ammonia’s toxicity, flammability and material compatibility have to be taken in to account. Colorless gas or liquid and gas ammonia expand and contract with changes in pressure and temperature actually. The same time, there is a toxic refrigerant, and bring it to another area to dissipate efficiency! 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