"The technology they developed uses a mirrored parabolic trough to capture sunlight, heating fluid in a pipe along the mirror’s centerline. This fluid then powers a sort of air conditioner in reverse: Instead of using electricity to pump out cold air on one side and hot air on the other, it uses the hot fluid and cold air to generate electricity. At the same time, the hot fluid can be used to provide heat and hot water -- or, by adding a separate chiller stage, to produce cooling as well. A prototype of the system has been installed at a small clinic in the southern African nation of Lesotho; next year, the MIT team plans to have five fully operational systems installed in isolated clinics and schools there for field-testing."
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