non-condensing

The thermal efficiency of the best non-condensing engine to that of the gas-engine is in the ratio 4/22.

Scientific American Supplement, No. 508, September 26, 1885 Various

This would reduce the efficiency to about 6 per cent. for the best, and 3 per cent. for the ordinary non-condensing engines; and if to this we add the inefficiency of some boilers, it is certain that many small engines do not convert into power more than 2 per cent. of the potential energy contained in the coal.

Scientific American Supplement, No. 508, September 26, 1885 Various

The engine was, in fact, a non-condensing, single action steam pump with the steam and pump cylinders in one.

Steam, Its Generation and Use

BY MR.P. W. W.LLANS, M.I.C.E. The author described a series of economy trials, non-condensing, made with one of his central valve triple expansion engines, with one crank, having three cylinders in line.

Scientific American Supplement, No. 647, May 26, 1888 Various

Though the fourth claim of Watt's patent describes a non-condensing engine which would require high pressures, his aversion to such practice was strong.

Steam, Its Generation and Use

The engine consists of one non-condensing cylinder, 7-1/2 in. in diameter and 5.9 in. stroke.

Scientific American Supplement, No. 484, April 11, 1885 Various

Excepting, perhaps, in cases of very small powers, and in those instances where the exhaust steam from a non-condensing engine can be turned to good account for heating or drying purpose, it may safely be asserted that in all instances where a sufficient supply of condensing water is available at a moderate cost, the extra economy of a well-constructed condensing engine will fully warrant the additional outlay involved in its purchase.

Scientific American Supplement, No. 360, November 25, 1882 Various

In these days of high steam pressures, a well constructed non-condensing engine can, no doubt, be made to approximate closely to the economy of a condensing engine, but in such a case the extra cost of the stronger boiler required will go far to balance the additional cost of the condensing engine.

Scientific American Supplement, No. 360, November 25, 1882 Various

The next point to be decided is, whether a condensing or non-condensing engine should be employed.

Scientific American Supplement, No. 360, November 25, 1882 Various

Evans, in America, introduced non-condensing, and for that time, high pressure steam engines.

Steam, Its Generation and Use