. Applied thermodynamics for engineers. B from the re-generator through 5, and being kept at constantpressure by the heat from the furnace. Duringthe second half of this stroke, the supply of airfrom the regenerator ceases, and the pressure fallsrapidly as expansion occurs, but the heat im-parted from the furnace keeps the temperaturepractically constant, giving the isothermal pathBC. Meanwhile, the pump, receiving air at the pressure of the atmosphere, has been first compressing it isothermally, or asnearly so as the limited amount of cooling surface wdll permit, along FE, andthen discharging
. Applied thermodynamics for engineers. B from the re-generator through 5, and being kept at constantpressure by the heat from the furnace. Duringthe second half of this stroke, the supply of airfrom the regenerator ceases, and the pressure fallsrapidly as expansion occurs, but the heat im-parted from the furnace keeps the temperaturepractically constant, giving the isothermal pathBC. Meanwhile, the pump, receiving air at the pressure of the atmosphere, has been first compressing it isothermally, or asnearly so as the limited amount of cooling surface wdll permit, along FE, andthen discharging it through e at constant pressure, along EA, to the receiver the down stroke, the engine steadily expels the air, now expanded down toatmospheric pressure, along the constant pressure line CD, while the pump simi-larly drawls in air from the atmosphere at constant pressure along DF. At the endof this stroke, the air in F, at the state A, is admitted to the engine. The ratio of pump volume to engine volume is FD -^ DC, or — •. ^.T Fig. 110. Arts. 270, 272, 273.—Ericsson Cycle.
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