Energy evaluation of an integrated water supply system

ABSTRACT The energy burdens of the Feira de Santana Integrated Water Supply System (SIAA-FSA) were analyzed using the life cycle assessment method. The higher energy burdens in the water supply chain were identified and scenarios for improvement were proposed. The supply chain of chemicals, transportation, electricity and replacement of pipes were considered for SIAA-FSA. The cumulative energy demand of SIAA-FSA was 3.51 kWh.m-3 of consumed water. The water uptake and distribution steps presented the highest energy demands, and the electricity for pumping represented 86% of the cumulative energy demand. The SIAA-FSA proposed scenarios showed significant improvements over the current one, with rational use of chemicals, electricity and water.

摘要 本研究采用生命周期评估法（life cycle assessment），对费拉德桑塔纳综合供水系统（Feira de Santana Integrated Water Supply System，SIAA-FSA）的能源负荷展开分析。研究识别出该供水供应链中能源负荷较高的环节，并提出了相应的改进方案。本次分析涵盖了SIAA-FSA的药剂供应链、运输、电力使用及管道更换环节。SIAA-FSA每供应1立方米用水的累计能源需求为3.51千瓦时（kWh·m⁻³）。其中，取水与配水环节的能源需求最高，抽水用电占累计能源需求的86%。所提出的SIAA-FSA改进方案通过合理利用药剂、电力与水资源，相较现行系统实现了显著优化。