Pumps triple expansion

Triple expansion direct-acting steam pumps have three cylinders on each side, arranged tandem, viz, one high-pressure, oneintermediate-pr ssure. one lo -... 

The low-duty triple-expansion pump has taken the place of the high-duty compound pump and only triple-expansion high-duty pumps are now built. They give the same duty as crank and flywheel triple-expansion pumps, have greater flexibility, require lighter foundations and the valve motion is simple. Adjustment for speed is made by hand throttle valve which is satisfactory because the load is constant. 

For influence on a temperature range (its expansion or compression) and improvements of efficiency binary heat machines (on two hydrides) have been modified for operation in multistage modes (triple heat pumps). The choice of three of hydrides and an estimation of efficiency of thermodynamic cycles for such HHP can be determined, basing on the approaches developed in [13, 14]. 

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