Laserfiche WebLink
and all other ice systems operational components. This control would provide 15-20 <br />years of service. <br />2. Flooded Chiller <br />a. The Vilter chiller has at least another 10-15 years of life in the chiller tubes are <br />inspected and in good condition. <br />b. The chiller tubes should be inspected and if found in poor condition could be <br />replaced and provide another 15-20 years of service. <br />c. A potential “energy savings option” for replacing the flooded chiller could include a <br />modified design using a flat-plate chiller that operates with ammonia and ethylene- <br />glycol brine in lieu of a traditional shell-and-tube chiller and calcium-chloride brine. <br />This option will require a more detailed study than included in the scope of this <br />report to determine its feasibility. <br />3. High Pressure Receiver <br />a. The Vilter High Pressure Receiver is in good condition and could provide service for <br />another 10 years with proper maintenance. <br />4. Evaporative Condenser <br />a. The evaporative condenser and related water and refrigeration piping should be <br />replaced within the next five years. <br />b. Energy saving idea: The efficiency of the condenser could be enhanced by utilizing a <br />Variable Frequency Drive (VFD) motor on the condenser fans. <br />5. Condenser Water Pumps <br />a. The cooling water piping from the pumps to the evaporative condenser is all original <br />and should be replaced along with the pumps in the next five years. <br />6. Remote Condenser Sump <br />a. The cast-in-place concrete sump is in good shape and has many years of useful life <br />before it will need to be replaced. <br />7. Chemical Treatment System <br />a. The chemical treatment system for the condenser water has at least 10 years of <br />useful life before it will need to be replaced. <br />8. Electrical Power and Controls <br />a. The Cutler-Hammer Motor Control Center is original and should have about 10 years <br />of useful life remaining. However, the starter for Compressor No. 2 was replaced a <br />few years ago and it is has become apparent to City staff that parts are difficult to <br />find. If sourcing replacement parts continues to be problematic, it may be necessary <br />to replace Motor Control Center in its entirety. The magnitude of the replacement <br />requirements can be more effectively evaluated as part of the final design of an <br />improvement project in the future. <br />b. Energy saving idea: The efficiency of the refrigeration system can be enhanced by <br />utilizing Variable Frequency Drive (VFD) motors on the brine pumps, in addition to <br />the condenser fan motors as previously discussed. <br /> <br />222222 <br /> <br />