A detailed description of Davey’s atmospheric engine from 1885 was added under “history”. I think this is the first ever published article on the topic and it includes e.g. the efficiency
New pages added
Purpose: development of a heat engine for low-grade heat from e.g. renewable energy or industrial waste hea. Description of engine, and introduction of crowd funding project to build a 2 kW engine
The Condensing Engine Project 