Digital flow sheet

Each piece of equipment shown on the flow-sheet must be identified with a code number and name. The identification number (usually a letter and some digits) will normally be that assigned to a particular piece of equipment as part of the general project control procedures, and will be used to identify it in all the project documents. 

If the flow-sheet is not part of the documentation for a project, then a simple, but consistent, identification code should be devised. The easiest code is to use an initial letter to identify the type of equipment, followed by digits to identify the particular piece. For example, H—heat exchangers, C—columns, R—reactors. The key to the code should be shown on the flow-sheet. 

Figure 3-42. Flow sheet of a first-order digital differentiator. To get higher-order derivatives the data must be stored, and differentiated again.

Figure 3-43. Flow sheet of a second-order differentiator, consisting of a two-channel digital storage oscilloscope and an intermediate digital memory.

Figure 3-58. Flow sheet for possibilities of data storage. If the signal source is digital, the secound and third module must be omitted.

Figure 4-1. General flow sheet for analog and digital generation of derivatives. (PCM pulse-code modulator.)...

Figure 1 Examples of different morphologies, surface textures and sediment cover on lava flows on the northern East Pacific Rise. Digital images were taken from heights of 5-1 Om above the seafloor using the Woods Hole Oceanographic Instution s camera system. The dimensions of the photographs are approximately 4.5 m x 3.0 m. (A) Pillow lava. (B) Hackly or scrambled flow. (C) Lobate lava. (D) Lineated sheet flow. (E) Ropy sheet flow. (F) Collapse structure in lobate flows. (G) A young flow contact on top of older flows. (H) Heavily sediment covered lobate flows with small fissure. Images from Kuras etal. 2000.

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