Early Mallet locomotives had compound cylinders, so high pressure steam was provided to the rigid power unit, while the front cylinders ( requiring flexible steam pipes ) received low pressure steam.
12.
As the low pressure steam from the boiler flowed into the cylinder, the weight of the pump and gear returned the beam to its initial position whilst at the same time driving the water up from the mine.
13.
The most efficient thermal system is combined cycle in which a combustion turbine powers a generator using the high temperature combustion gases and then exhausts the cooler combustion gases to generate low pressure steam for conventional steam cycle generation.
14.
"' Energy Plant 4 "', with its seven 1.2 MW Isopentan Ormat turbines, was built in 1989-1992 to produce energy with hot excess steam and low pressure steam from the other energy plants.
15.
The " Jonquil " class of buoy tenders were U . S Army built mine planters acquired by the Coast Guard after World War II . Built around 1942, these vessels were designed for diesel engines but low pressure steam plants were installed instead.
16.
The ships were originally named the SS " Alberta " and SS " Albany ", and after the transfer of ownership " Alberta " was renamed " Laurentic " and her sister " Albany " became quadruple expansion engines, while " Laurentic ", with the same hull and boiler power, was given an experimental configuration consisting of three screws : The two wing propellers were driven by 4 cylinder triple expansion engines, while the third centre propeller was driven by a low pressure steam turbine, utilising the exhaust steam from the first two engines.
