Читать книгу Practical Power Plant Engineering - Zark Bedalov - Страница 17

If the project gets a go ahead by the investment partners, the investors or their bank will provide initial funding to engage an engineering company to investigate the project a bit closer. There are a number of different engagements possible between the owner and the engineer that can be employed. That may be a subject of another book.

The project team with all the engineering disciplines has been given an assignment to develop conceptual drawings and budget estimate. The conceptual design includes plant layouts, load flow diagrams, electrical design criteria for all the electrical activities and equipment, a key one‐line diagram, and a reasonable accurate capital cost estimate to be presented as a “bankable feasibility study.” This document will also serve as a basis for the future detail engineering design to build the project, should the project proceed further.

The design calculations in this conceptual study will use the system and equipment characteristics from previous projects similar to this one to generate the design parameters for the new project. The budget estimate is obtained from the various budget quotations, previous projects, and earlier work done in the country of the project with their labor rates.

During this three to six months of engineering phase, some major long lead mechanical and electrical equipment may be ordered on the basis of a possibility of cancelling the orders if things don't “pan out.” The electrical lead equipment may include the main transformers and HV switching equipment.

The flow diagrams show the flow of the ore, through the various plant processes, including additions of other ingredients: water, heat, and fuel to process it and take it to the final product. In this case, the final products are bars of Cu and Zn. Where there is Cu, there is a chance of minor percentage of gold, while silver is never far off from a deposit of Zn.

From the electrical design perspective, design criteria, major cable routing, and one‐line diagrams will define the shape of the plant power distribution and other aspects of the electrical equipment and plant operation.