| Abstrakt: |
Since design is one of the chief factors in the economic success of a transmission system, the engineering principles and the requisite empirical data are discussed herein as employed in the design of a pipe-line system now completed. The maximum day demand in successive years of development is analyzed by component parts, particular emphasis in the domestic element of the load being given to previous usage of manufactured gas in terms of B.t.u. per average meter for range and water-heating purposes and to the probable space-heating element based upon the degree-day deficiency method. A brief discussion is included of basic relationships of the factors in the pipe-line flow formula. Consideration is given to relative physical advantages to be derived from application of an understanding of compressor requirements at varying ratios of pipe-line pressure expansion. The unusual features inherent in the looping of lines are shown graphically. Reasons for using a 24-hour instead of a 1-hour period as the time interval of maximum load in design are explained. A diagrammatic presentation of a part of an actual system is made, and discussion thereof is included, to illustrate the manner in which the several engineering principles apply. |
