{"title":"Optimization of equipment sizes and intermediate surge capacity in industrial minerals processing plants","authors":"William R. Ernst ★, Mark G. Mod","doi":"10.1016/0377-841X(78)90005-0","DOIUrl":"10.1016/0377-841X(78)90005-0","url":null,"abstract":"<div><p>Two important items must be considered in the early stages of design of a processing plant which contains a cyclic element such as a scaling crystallizer, a filter, a fixed bed adsorber, etc. They are the influence of cycle length on the size of all equipment elements in the process, and the effect of available storage capacity of feed to the cyclic element on process economics. These considerations are particularly important in the development of equipment sizes for industrial minerals processing plants, many of which contain scaling crystallizers.</p><p>The problem of determining cycle time for an item of equipment of fixed capacity to either maximize total production, or to minimize operating costs has been discussed previously. The present work examines a constrained version of this classical problem. It addresses the problem of determining the cycle time that minimizes annual operating costs after the annual plant production rate has been fixed. First, a generalized material balance is developed for a model processing plant which contains scaling and non-scaling elements. Second, a generalized equation which represents rate of scale formation is used in conjunction with the material balance equation to relate equipment design capacity and the required amount of storage capacity with cycle time. Third, a generalized cost equation is developed which can be used to determine optimum cycle time, optimum equipment sizes and required storage capacity. An example is given.</p></div>","PeriodicalId":100475,"journal":{"name":"Engineering and Process Economics","volume":"3 4","pages":"Pages 247-255"},"PeriodicalIF":0.0,"publicationDate":"1978-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0377-841X(78)90005-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90290645","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Diary of events","authors":"","doi":"10.1016/0377-841X(78)90013-X","DOIUrl":"https://doi.org/10.1016/0377-841X(78)90013-X","url":null,"abstract":"","PeriodicalId":100475,"journal":{"name":"Engineering and Process Economics","volume":"3 4","pages":"Pages 297-298"},"PeriodicalIF":0.0,"publicationDate":"1978-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0377-841X(78)90013-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137408896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"List of books reviewed","authors":"","doi":"10.1016/0377-841X(78)90017-7","DOIUrl":"https://doi.org/10.1016/0377-841X(78)90017-7","url":null,"abstract":"","PeriodicalId":100475,"journal":{"name":"Engineering and Process Economics","volume":"3 4","pages":"Page 303"},"PeriodicalIF":0.0,"publicationDate":"1978-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0377-841X(78)90017-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137408894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Economic background of chemical integration - a case study","authors":"K.R. Westerterp","doi":"10.1016/0377-841X(78)90008-6","DOIUrl":"10.1016/0377-841X(78)90008-6","url":null,"abstract":"<div><p>In this second paper on chemical integration the author refines the usual relation of total costs equals fixed plus variable costs further by splitting the fixed costs into core, true fixed and capacity related fixed costs. A set of equations for a simplified definition of the returns on investment for an entire chemically integrated complex and individual production units in the manufacturing plant is given, from which the individual contributions of diversification and of chemical integration can be deduced. An example taken from practice is given.</p></div>","PeriodicalId":100475,"journal":{"name":"Engineering and Process Economics","volume":"3 4","pages":"Pages 279-286"},"PeriodicalIF":0.0,"publicationDate":"1978-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0377-841X(78)90008-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78060635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Managing capital expenditures for construction projects","authors":"E.A. Stallworthy","doi":"10.1016/0377-841X(78)90012-8","DOIUrl":"10.1016/0377-841X(78)90012-8","url":null,"abstract":"","PeriodicalId":100475,"journal":{"name":"Engineering and Process Economics","volume":"3 4","pages":"Page 296"},"PeriodicalIF":0.0,"publicationDate":"1978-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0377-841X(78)90012-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75063385","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Equipment prices and market forces","authors":"A.M. Gerrard","doi":"10.1016/0377-841X(78)90004-9","DOIUrl":"10.1016/0377-841X(78)90004-9","url":null,"abstract":"<div><p>The effect of market forces on the quoted costs of process equipment has been measured and analysed. It is shown that a cyclical influence is superimposed on the upward trend due to inflation. Time series analysis shows that the market factor can be described by a low order autoregressive process.</p></div>","PeriodicalId":100475,"journal":{"name":"Engineering and Process Economics","volume":"3 4","pages":"Pages 241-245"},"PeriodicalIF":0.0,"publicationDate":"1978-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0377-841X(78)90004-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90105574","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Design Developments related to safety, costs and solid systems","authors":"A.V. Bridgwater","doi":"10.1016/0377-841X(78)90011-6","DOIUrl":"10.1016/0377-841X(78)90011-6","url":null,"abstract":"","PeriodicalId":100475,"journal":{"name":"Engineering and Process Economics","volume":"3 4","pages":"Pages 295-296"},"PeriodicalIF":0.0,"publicationDate":"1978-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0377-841X(78)90011-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"101669003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Project contracts from the owner's viewpoint","authors":"FrankG. Watson","doi":"10.1016/0377-841X(78)90003-7","DOIUrl":"10.1016/0377-841X(78)90003-7","url":null,"abstract":"","PeriodicalId":100475,"journal":{"name":"Engineering and Process Economics","volume":"3 4","pages":"Pages 237-240"},"PeriodicalIF":0.0,"publicationDate":"1978-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0377-841X(78)90003-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"106000942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Epe plant cost indices international","authors":"John Cran","doi":"10.1016/0377-841X(78)90002-5","DOIUrl":"https://doi.org/10.1016/0377-841X(78)90002-5","url":null,"abstract":"","PeriodicalId":100475,"journal":{"name":"Engineering and Process Economics","volume":"3 4","pages":"Pages 235-236"},"PeriodicalIF":0.0,"publicationDate":"1978-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0377-841X(78)90002-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137408893","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Title index","authors":"","doi":"10.1016/0377-841X(78)90016-5","DOIUrl":"https://doi.org/10.1016/0377-841X(78)90016-5","url":null,"abstract":"","PeriodicalId":100475,"journal":{"name":"Engineering and Process Economics","volume":"3 4","pages":"Page 303"},"PeriodicalIF":0.0,"publicationDate":"1978-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0377-841X(78)90016-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137408895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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