LCM Optimization by Using a Higher-Efficiency Chilled Water Supply System and Implementing Optimal Combinations of Maintenance Methods
2007
SUMMARY Energy saving requirements make it imperative to cut CO2 emissions, reduce energy consumption, and curtail costs at the same time. Life Cycle Management (LCM) evaluations are used to assess the effects of such energy saving efforts. In this study, LCM evaluations were conducted on the air-conditioning chilled water supply system installed as an ESCO facility in the cleanrooms at a semiconductor manufacturing plant. A detailed analysis of the overall system including the pumps, cooling towers, and chillers was conducted to identify the effects of using higher-efficiency absorption chillers and explore optimal mixes of maintenance methods. The analysis yielded quantitative indications of reduced Life Cycle Cost (LCC) and Life Cycle CO2 (LCCO2) emissions attributed to the use of advanced chillers. The scheme and timing of maintenance practices best suited for specific types of chillers and the degree of cooling water fouling were also identified.
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