In this way a large amount of heat is lost to nature without being used, and the efficiency of the process is just thirty to forty percent, but for a power plant whose only purpose is to generate electricity, the loss is unavoidable.
因此，在整個能源的使用流程中，只產生了電能，而大量的蒸汽廢熱卻散放到大自然中，無法利用。這種能源使用的效率只有百分之卅到四十，很顯然並不經濟。對於以發電為唯一目的的電廠來說，卻無可避免。