translation.en: And then renovating smaller chillers instead of adding bigger ones saved 17 million dollars of capital cost, which helped pay for the other improvements and reduce the payback to just three years.
translation.zh: 我们翻新小型冷却机，而不添置大型冷却机 这也省下了1700万的资本成本 节省下来的成本得以被用于改进其它部门 同时，投资回收期被减少到三年