Indicator diagram

From Hmolpedia
Jump to navigation Jump to search

In thermodynamics, indicator diagram (TR:34) (LH:2) (TL:36) is a device comprised of an “indicator”, originally a pen attached to a pressure gauge (Watt, 1790), and a "diagram", or sheet of paper attached to a horizontally-moving board which attached to the piston head (Southern, 1796), which makes, during a heat cycle, a Cartesian coordinate diagram, that indicates, graphically, the thermodynamic variables on each of its coordinates, which varies as the piston moves in the piston and cylinder engine, originally pressure on x-axis (ordinate) and volume on the y-axis (abscissa).

External links

Theta Delta ics T2.jpg