Transactions - American Society of Heating, Refrigerating and Air-Conditioning Engineers . Heating with the Exhaust BY PERRY WEST, MEMBER After remarking at one of our recent New York Chapter meetings,that the subject of cyHnder condensation was somewhat shopwornand divested of the proper interest as a subject for some proposedtests, I was asked by our Secretary to prepare this paper upon thesubject. Faihng to prevail against his desire in this connection,you will appreciate the position which I am in. I remember, while going into the subject myself some time ago,however, that several very int
Transactions - American Society of Heating, Refrigerating and Air-Conditioning Engineers . Heating with the Exhaust BY PERRY WEST, MEMBER After remarking at one of our recent New York Chapter meetings,that the subject of cyHnder condensation was somewhat shopwornand divested of the proper interest as a subject for some proposedtests, I was asked by our Secretary to prepare this paper upon thesubject. Faihng to prevail against his desire in this connection,you will appreciate the position which I am in. I remember, while going into the subject myself some time ago,however, that several very interesting points came up which may beworthy of notice. I remember also of having to brush a great deal ofdust off of my elementary thermodynamics and that the subjectlooked quite different and seemed to hold a fancy, strange to my lastrecollections of such matters. If you will pardon my doing so, therefore, I shall start this talkabout some of these little things upon which we frequently build sornuch and then sometimes forget that they are the underlying foun-dation of our Fig. L .P U: Figure 1, shows a cylinder (C) closed at one end and open at theother. ENGINE CONDENSATION 71 (P) is a tightly fitting frictionless piston free to move up and downand (W) is a superimposed weight bearing on the piston. (L) isa pipe line leading from a steam supply (B) under pressure. Ifnow, the valve (V) be opened, steam will enter and raise the pistonand weight, and when closed again, the piston will stop at a point(P), such that the total weight just balances the total pressure onthe underside of the piston. Now assuming that the weight (W)and the piston are of exactly the same weight, if we remove theweight (W) the piston will rise to point (P), so that the originalvolume of the steam (as contained in the cylinder when the pistonwas at (P), will be practically doubled and its pressure per unit ofarea will be practically halved. During this process while the pistonis passing from (
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