Thermal Energy and Work Steam Engines

First Internal Combustion Engine How did we get here?

Steam Engines Steam engine – any machine that generates steam and converts the steam pressure into mechanical motion 1600’s in England, wood and charcoal were scarce, therefore people needed an alternative source of fuel History Channel - Video

Savery’s Steam Engine Built to help pump water out of the mines (replaced horses who were used to carry buckets of water from the deep coal mines) Patented in 1698,

Savery Engine Fire boils the water in the boiler Opens the valves at point E, so steam fills vessel Steam in vessel condenses and creates a vacuum. Pressure is now less in the vessell than in the atmosphere, so it pushes water into the last vessell Close valves and steam pushes water from top of pipe

Drawbacks Inefficient and costly to operate Inventors continued to search for new/improved engines designs

Newcomen’s Atmospheric Engine Atmosphere plays important role again Again used to pump water out of mines Read Page 143 and fill in the information on your page.

Watts Steam Engine Page 144-145

Steam Turbine Engine Page 146-147

Internal Combustion Engine Watch the video on your sheet

Check Up! Complete the review questions on page 149 – Questions 1 to 4