Central Plant Chiller Systems: Ammonia vs. R-134a
Central Plant Chiller Systems: Ammonia vs. R-134a (2003)-The relative merits of using ammonia vs. R-134a will receive increasingly greater attention as the phase-out date for R-22 approaches. Through case studies of two plants, this paper examines the relevant issues regarding the use of ammonia vs. R-134a, including how the fundamental thermodynamic properties of the two refrigerants affect the design of real world refrigeration systems. It also compares first costs and operating costs for chillers or central plant refrigeration systems, and the advantages and disadvantages of ammonia systems vs. R-134a systems. Finally, the paper examines the costs of addressing regulations for ammonia vs. R-134a, and compares the code requirements for design and installation using each refrigerant.
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