h.11,1950. A.EINSTEIN ET AL 1,781.541 RBPRI0E利ATION Einstein's Contributions.The 1929 F41edD0c.16,1927 Between 1926 and 1932,Albert Einstein.in collaboration with Leo Szilard.obtained 17 patents related 35 to improvements in heat pumps.Ein- stein's patents related to absorption cycles were innovative but the ideas were never developed fully.In fact. his interest in heat pumps ended 37 when he left Germany. One of Einstein's patents.illus- trated in Figure 3.is for an absorp- tion cycle that operates without any mechanical work input.Thermally induced density differences cause the fluids-butane,ammonia,and wa- ter-to be circulated by gravity.Un- Einstein's k-x6么 Contributions 上游充通大 May9,2019 19 SHANGHAI JIAO TONG UNIVERSITYMay 9, 2019 19 Einstein’s Contributions