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Project Schedule <br />The improvements should be planned well in advancc of the d�sared construction time so <br />equipment and materials can be ordered and delivered to the site and the headers for the direct <br />floor can be fabricated especially with today's economy. <br />Five months is typically a comfortable construction schedule for replacing both the refrigeration <br />system and the ice rink floor. Another 2 to 3 months should be added for design and obtaining <br />all the necessary City approvals. Therefore, 7 to 8 months should be allowed far the project <br />schedule. This timeframe will vary s�*n� between the construction of a direct ice systein and an <br />indirect ice system. <br />RECOMMEDATIONSAND CONCLUSIONS <br />There are several options to consider for replacing the oval's chiller as discussed it1 detail in this <br />report. The final decision will depend on several factors such as capital costs, operation and <br />maintenance requirements, reliability, system redundancy and ease of operation. The following <br />options are recommended and should be discussed in greater detail before selecting the ultimate <br />replaccmcnt option. <br />Re-tube the existing chrller. This is the least expensive option. Since the shell and end bells <br />of the existing shell and tube chiller were tested and found in good shape, it is recommended <br />that tl�e existing chiller be re-tubed and not replaced with another shell and tube type chiller. <br />It is also recommended that the system continue to use the calcium chloride type solution <br />rather than switching to glycol. There appears to be little if any advantage to re-tubing the <br />chiller with stainless steel material and the cost would be substantial, therefore, it is <br />recommended that the existing carbon steel tubes be replaced with the same material. <br />The total cost of this project is estimated to be: $297,100 <br />`I'Itiis cost estimated includes the following alternate bid items: <br />A. Installing a permanent support system on each end of the chiller to assist in removing the <br />end bells when maintenance or inspection is required. <br />S. Painting the high pressure receiver <br />C. Installing site glasses on the chiller vessel <br />3. Ir�ple�nent a more rigorous testz�ag p��agrcz�n. This will help identifying problems earty on <br />and prevent major equipment failures or problems in tlYe system. <br />The total cost of this project is estimated to be: $900 <br />4. Perforn2 irnprove�rzents to the existing secondary refrigerant system. The improvements <br />discussed in this report are necessary to provide a safe, efficient and long lasting system <br />The total cost of this project is estimated to be; $82,800 <br />