Refrigerant development and legal situation Stratospheric ozone depletion as well as at-mospheric greenhouse effect due to refriger-ant emissions have led to drastic changes in the refrigeration and air conditioning tech-nology since the beginning of the 1990s. About eight gallons of ammonia weighs the same as five gallons of water. ISO 17584:2005 specifies thermophysical properties of several commonly used refrigerants and refrigerant blends. First, flush the eyes with clean water. It is readily available, inexpensive, operates at pressures comparable with other refrigerants and is capable of absorbing large amounts of heat when it evaporates. Ammonia (NH 3) is a well-known refrigerant, particularly applicable in large, industrial plants where its advantages can be fully utilized without compromising safety.. Ammonia is renowned for its favorable thermodynamic properties. Provide training specific to the handling of ammonia. In very large cooling systems, like those in food processing facilities, ammonia is a common choice of refrigerant. to manage changes to equipment, procedures, Volume : Internal Energy : Enthalpy : Entropy: deg-C : kPa : m^3/kg : kJ/kg : kJ/kg : kJ/kg*K: Temp. It’s origins as a refrigerant can be traced all the way back to the 1800’s and it was one of the first refrigerants used in a variety of applications. Investigate accidents and near misses When the pressure is released, the liquid evaporates rapidly, generally forming an invisible vapor or gas. Calculation of thermodynamic state variables of ammonia. Because water can absorb ammonia so readily, it is a factor that contributes to human toxicity. It is at least 99.95 percent pure ammonia. SI units. Because liquid ammonia boils at -28°F, the expanding gas has the potential to freeze anything in its path of release, including human flesh and organs. Physical Properties of Ammonia. Decontaminate the victim as quickly as possible. [. It has a pungent odor with and an alkaline or soapy taste. Ammonia is still, without a doubt, the most important industrial refrigerant in the present day because of its good thermodynamic properties and it’s cheap. [. High Heat Transfer Coefficient. U.S. Department of Labor | Occupational Safety & Health Administration | 200 Constitution Ave., NW, Washington, DC 20210. If the plant is outside or on the roof of a building, the escaping ammonia can drift away without harming occupants. This is a list of refrigerants, sorted by their ASHRAE-designated numbers, commonly known as R numbers. Pressure: Temperature: Calculation of thermodynamic state variables of ammonia on the boiling curve. Comparison R404a V/S Ammonia For cold room Design Basis-3 Rooms, Each 12mx24mx9m-Sotage 500 Ton each Temperature -200 C, For storage of Frozen Products, Refrigeration load 3x42kW=126kW R404a-Air Cooled R717-Ammonia-Water cooled 2units per Room screw compressors-6nos. Why Ammonia Refrigeration? The permissible exposure limit (PEL) is 50 ppm "Anhydrous" is a Greek word meaning "without water;" therefore, anhydrous ammonia in ammonia without water. Ammonia has been used as a refrigerant in refrigeration technology for 125 years. Alkalis, such as ammonia cause liquidization of tissue and turn tissue into a sticky "goo" and mix with this tissue, causing further damage. Ammonia, also known as R-717, is one of the oldest refrigerants. tissue. This makes the equipments compact and reduced the operating cost. Ammonia is not, strictly speaking, a poison and repeated exposure to it produces no additive (chronic) effects on the human body. Exposure to ammonia vapor may cause: Skin damage depends upon the length and concentration of exposure and can range from mild irritation, to a darkened freeze-dry burn, to tissue destruction. cubic foot of gas. fittings, and piping. 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