Heinrich Zoelly

Zoelly c. 1910 about age 50

Heinrich Zoelly (1862–1937) was a Mexican-Swiss engineer. He developed steam turbines and turbine-driven locomotives and patented the geothermal heat pump in 1912.[1]

  1. ^ Zogg, M. (20–22 May 2008), ""History of Heat Pumps Swiss Contributions and International Milestones" (PDF), 9th International IEA Heat Pump Conference, Zürich, Switzerland {{citation}}: Missing or empty |title= (help)CS1 maint: location missing publisher (link)

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