座落在北京王府井的北京饭店是一个有着８００多间客房的五星级大饭店，然而对于这样一个豪华的大饭店来说，电能的消耗也是极其惊人的。１９９４年，北京饭店的年用电量为２１９８万千瓦时，仅电费开支一年就得８５８万元。这么大的用电量，成了经营成本中的一个大包袱，影响 Beijing Hotel, located in Beijing Wangfujing, is a five-star hotel with more than 800 rooms. However, for such a luxurious hotel, the consumption of electric energy is also extremely alarming. In 1994, the annual electricity consumption of Beijing Hotel was 21.98 million kwh, and the annual expenditure on electricity alone was 8.58 million yuan. Such a large amount of electricity consumption, has become a big burden in the operating costs, the impact