Wang Buxuan (5 February 1922 – 31 August 2019), also known as Bu-Xuan Wang and Pu-Hsuan Wang, was a Chinese thermal physicist and engineer, considered a pioneer in the field of engineering thermodynamics in China. He established the engineering thermodynamics program at Tsinghua University in 1957 and the China Solar Power Society in 1979. He was elected an academician of the Chinese Academy of Sciences in 1980.