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Comparing Ammonia Evaporator Construction: Which One Is Best?

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COMPARING AMMONIA EVAPORATOR CONSTRUCTION:“WHICH ONE IS BEST?”

Abstract

Industrial ammonia evaporator manufacturers offer several types of construction including: galvanized steel, stainless steel tubes with aluminum fins, stainless steel tubes with stainless steel fins, and aluminum tubes with aluminum fins, as well as a number of corrosion resistant coatings. Trying to decide on the right one for a given facility and/or process can be confusing and leads to the question: “Which one is best for my application?” The metals used in each type of construction mentioned above have unique properties which affect the evaporator in terms of thermal performance, weight, defrost energy, corrosion resistance, and cost. Good performance and energy efficiency have a direct positive effect on return on investment for the facility. The weight of the evaporators may affect the roof structure of the building in the case of ceiling or roof mounted units, especially in high seismic zones. In food processing plants where harsh cleaning chemicals are increasingly used on evaporators, appropriate corrosion resistance behavior is critical. The article examines the different types of construction and their characteristics and makes recommendations regarding which type of construction best suits specific applications and operating environments.

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