Cutting edge

 作者:昝滞铕     |      日期:2019-03-03 04:07:00
PAINT ON A HOT TIN ROOF Painting roofs white is a simple way to cut the massive amount of energy used to run air-conditioning units in hot weather. But for some reason people just don’t like white roofs, says William Miller at Oak Ridge National Laboratory in Tennessee, so he and his colleagues have developed paint that will increase the reflectance of a house roof without painting it white. White roofs usually remain close to the air temperature, whereas dark roofs can be as much as 40 °C hotter on a sunny day,