Beam engine design, problem

There was a big problem with the initial beam engine design. When the cold water was admitted into the steam cylinder, the water not only absorbed the latent heat of the condensing steam but also cooled the iron walls of the steam cylinder. Then, when the next charge of steam was admitted to the cylinder from the boiler, a lot of the steam s heat was wasted in reheating the iron walls of the cylinder. Then, again, an awful lot of cold water was wasted in cooling the steam cylinder each time the motive steam had to be condensed. 

There was a big problem with the initial beam engine design. When the cold water was admitted into the steam cylinder, the water not only absorbed the latent heat of the condensing steam but also cooled the iron walls of the steam cylinder. Then when the next... 

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