As a big energy consumer, air-conditioners are highly relevant to the energy shortage and electric power shortage at present.

空调作为耗能大户，与能源紧张局势，特别是当前电力紧张局势的形成有着密切的关系。

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Brownout: a reduction or cutback in electric power especially as a result of a shortage a mechanical failure or overuse by consumers.

部分灯火管制：由于电力不足、发电机出故障或用户用电过度而减少电力供应或停止供电。

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Many power plants at coast area use seawater as condenser cooling water with the increasing demand of electric power and the shortage of fresh water.

近年来，由于对电力的需求越来越多，加上淡水资源的匮乏，大部分滨海电厂都致力于采用海水作为凝汽器的冷却水。

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Meanwhile, Tohoku Electric Power covers the northern region of Japan and it said its power shortage would depend on how quickly the region and its industries can be rebuilt.

BBC: Japan quake: Nuclear closures to cause power shortages

But then came July, when Mirant, Reliant Energy, Duke Energy, Dynegy and others took heat for their possible role in creating an artificial shortage during the 2001 electric power crisis.

FORBES: Where's The Juice?

An area of little doubt: The next few weeks will bring more difficulties to areas untouched by the earthquake and tsunami as the electric utility Tepco institutes rolling blackouts in the Kanto region around Tokyo to cope with a shortage of power.

FORBES: For An Accessible Explanation Of Japan's Nuclear Crisis, Watch 'The West Wing'