利用动态的年计算费用法将以电做为补充能源的太阳能开水器。
The solar energy boiled water tank supplies boiled water using electricity as the supplementary energy source.
用年经常费用法对几种冷热源方案的年固定费用和年运行费用进行了计算比较。
Based on the calculation of annual fixed expenditure and annual running cost, compares some heat and cold source schemes with annual current expenditure method.
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