Modern Refrigerating Machinery - Its Construction, Methods Of Working And Industrial Applications; A Guide For Engineers And Owners Of Refrigerating P

REFRIGERATING MACHINERY ITS COSSTRCCTION, XETIIODS OF iiTOItliING AKD INDUSTRIAL APTTICATIOSS A GUIDE FOR EXGIIYEERS - 1905 - PREFACE TO THE THIRD EDITION. - THE preparation of this work, which is intended especially to meet practical requirements and which appeared first at the end of 1896, and as a second edition1 in the beginning of 1899, has been urged upon me by several colleagues. I have attempted to treat of the province of the artificial production of cold and of its applications as they exist at the present time, but I have limited myself to European conditions which have come within my own experience. The aim of the book forbids a mathematical treatment of the subject those numbers arrived at theoretically and necessary to the understanding of the processes described, together with numerous physical data, hence only find a place in Tables. I have sought to explain the application of these results to the elementary, approximate solution of the most important practical problems by the insertion of numerical examples. For a detailed and more especially theoretical treatment, with which the designer cannot dispense, I must refer the reader to text-books on Thermodynamics and to my papers Beitrage zur Beurteilung won Kiihlmaschinen, Zeitschrift des Vereins Deutscher Ingenieure, 1894 Vergleichende Theorie und Berechnung der Kompressions-Kuhlmaschinen, Zeitschrift fiir die gesamte Kalteindustrie, 1897, and Die CYirkungsweise und Berechnung der Ammoniak-Absorptiommashinen, ibid., 1899. Besides these a French translation has been prepared by P. Petit and J. Jaquet. and was published in 1897 by Messrs. Gauthier-Viars et Fils of Paris under the title Machines frigorifiques. I Great valuemust be attached to a systematic arrangement of the matter, and I hope that I have succeeded in compressing the comprehensive material at my disposal into a relatively narrow space without influencing its lucidity. In view of the favourable reception accorded to the book in practical circles, I have in this third edition held fast to these principles. Besides numerous small additions, which are, for the most part, the immediate results either of experiment or of stimulating intercourse with practical. engineers, this edition contains a section Chapter X on the determination of the cool- ing effect, which I hope will be welcome to many readers. On the other hand, the list of references to the literature, which experience has shorn me is made little use of, has been entirely omitted, owing to the demands of space. Finally, I wish to express my thanks to my assistant, Mr. G. Cattaneo, for his help in reading the proofs. GOINGEN, June 1901. H. LORENZ. CONTEXTS . THE PRISCIPLES OF TIlE TIIEORY OF HE.T . PAGE 1 . Temperature ................................................. 1 2 . Heat ........................................................ 3 3 . Eqi-llrncr of IIent and J1echanicil M70rl ....................... 5 4 . Conertilility of He.tt ...................................... 9 5 . Conduction and Radiat.io11 of Hc.it 13 .............................. IIcthods of Cold Prodliction .....................................