No abstract

No abstract

The purpose of a steam power plant usually is power production; however, it can work as a dual-purpose plant with the production of steam and power simultaneously. The aim of this paper was to find the optimum integration of steam power plant as a source and a site utility system as a sink of steam and power. Estimation of cogeneration potential prior to the design of the central utility system for site utility systems is vital to set targets on the site fuel demand as well as heat and power production. In this regard, a new cogeneration targeting model was developed for the integration of steam power plant and site utility of the process plant. The new procedure for finding the optimal integration was proposed based on new cogeneration targeting. In addition, a modified Site Utility Grand Composite Curve (SUGCC) diagram was proposed and compared with the original SUGCC A steam power plant and a process site utility was considered as a case study. The applicability of the developed procedure was tested with other existing design methods, STAR® and Thermoflex software through a case study. The proposed method was shown to give comparable results and the targeting method was used for obtaining optimal integration of steam levels. Identifying optimal conditions of steam levels for integration is very important in the design of utility systems since the selection of steam levels in steam power plants and site utility for integration heavily influence the potential for cogeneration and energy recovery for the site. In this work, the integration of steam levels of steam power plant and site utility system were carried out in a case study, in which the usefulness of the this method was clearly demonstrated for reducing the overall energy consumption for the site.

The traditional design of product, the preceding constraints and limitations are considered sequentially. In order to reduce the product development cycle time and cost and increase quality and productivity, concurrent (simultaneous) design of product and process has been introduced. Electrochemical machining (ECM) is used to tackle exotic alloys of intricate shape and produce complex parts in hard metals with high surface quality and integrity. This paper addresses the concept of the knowledge base system (KBS) for optimization of product design and electrochemical machining process in computer integrated manufacturing (CIM) and computer based concurrent engineering environment. The KBS links with design and manufacturing data bases. The design specification is acquired through a feature based approach. The KBS links with material data base which holds attributes of more than 60 materials. It also links with tool data base which hold attributes of 7 tools material and also 3 type of electrolytes. KBS is also links with machine data base which hold attributes of different ECM machines. For each design feature, KBS provides information needed for design and manufacturing optimization. The KBS can be used as an advisory system for designers and manufacturing engineers. It can be used as a teaching program for designers and manufacturing engineers and new ECM operators in computer based concurrent engineering environment.