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ELK RIVER ICE ARENA—ICE SYSTEM EVALUATION AND RECOMMENDATIONS <br /> Recommendations <br /> The main focus of this report is to evaluate the 31-year old ice <br /> system in Rink 1 and provide recommendations to assist the <br /> City in its planning and budgeting for its replacement. Given <br /> that: the rink floor was replaced fairly recently in 2004; the <br /> system is a direct system; and that the options for refrigerants <br /> and systems in the ice rink industry are changing with the <br /> phase-out of R-22 refrigerant; there isn't a clear, single <br /> replacement option. This section outlines not only the options <br /> for replacement, but for improvements to the existing ice <br /> system as well. It is also prudent to consider the eventual <br /> replacement of the ice system in Rink 2 and how combining <br /> systems could maximize energy savings. Cost estimates are <br /> provided for each option in the table at this end of section. <br /> The following options will be discussed in this section: <br /> Option 1: Do nothing. Continue to maintain existing systems. <br /> Option 2: Make improvements to the existing direct system. <br /> Option 3: Convert to an indirect, industrial grade, R-22 or <br /> other HFC refrigerant based system using the <br /> existing refrigeration equipment. <br /> Option 4: New indirect, industrial grade, HFC refrigerant <br /> based system. <br /> Option 5: New indirect, industrial grade, ammonia based <br /> system. <br /> Option 6: Same as option 6 but includes future connection to <br /> Rink 2. <br /> Option 7: New carbon dioxide (CO2) based system. <br /> Option 8: Alternate energy source system. See Section 6. <br /> PIStevens 13 <br />