Abstract

Temporal variations in CO"sub"2"/sub" stream composition and mass flow rates may occur in a CO"sub"2"/sub" transport network, as well as further downstream when CO"sub"2"/sub" streams of different compositions and temporally variable mass flow rates are fed in. To assess the potential impacts of such variations on CO"sub"2"/sub" transport, injection, and storage, their characteristics must be known. We investigated variation characteristics in a scenario of a regional CO"sub"2"/sub" emitter cluster of seven fossil-fired power plants and four industrial plants that feed captured CO"sub"2"/sub" streams into a pipeline network. Variations of CO"sub"2"/sub" stream composition and mass flow rates in the pipelines were simulated using a network analysis tool. In addition, the potential effects of changes in the energy mix on resulting mass flow rates and CO"sub"2"/sub" stream compositions were investigated for two energy mix scenarios that consider higher shares of renewable energy sources or a replacement of lignite by hard coal and natural gas. While resulting maximum mass flow rates in the trunk line were similar in all considered scenarios, minimum flow rates and pipeline capacity utilisation differed substantially between them. Variations in CO"sub"2"/sub" stream composition followed the power plants’ operational load patterns resulting e.g., in stronger composition variations in case of higher renewable energy production. Temporal variations in CO"sub"2"/sub" stream composition and mass flow rates may occur in a CO"sub"2"/sub" transport network, as well as further downstream when CO"sub"2"/sub" streams of different compositions and temporally variable mass flow rates are fed in. To assess the potential impacts of such variations on CO"sub"2"/sub" transport, injection, and storage, their characteristics must be known. We investigated variation characteristics in a scenario of a regional CO"sub"2"/sub" emitter cluster of seven fossil-fired power plants and four industrial plants that feed captured CO"sub"2"/sub" streams into a pipeline network. Variations of CO"sub"2"/sub" stream composition and mass flow rates in the pipelines were simulated using a network analysis tool. In addition, the potential effects of changes in the energy mix on resulting mass flow rates and CO"sub"2"/sub" stream compositions were investigated for two energy mix scenarios that consider higher shares of renewable energy sources or a replacement of lignite by hard coal and natural gas. While resulting maximum mass flow rates in the trunk line were similar in all considered scenarios, minimum flow rates and pipeline capacity utilisation differed substantially between them. Variations in CO"sub"2"/sub" stream composition followed the power plants’ operational load patterns resulting e.g., in stronger composition variations in case of higher renewable energy production. Document type: Article

Abstract

Copyright © 2014 Vilnius Gediminas Technical University (VGTU) Press. In academia as in practice, seaports are increasingly viewed as elements in supply chains. It is argued that seaports should add value to shippers by aligning their own business activities with shippers Supply Chain Management (SCM) strategies and requirements. The implications of this port-SCM philosophy are not fully explored, however. In this context, it is especially important to create mutual understanding between shippers, in terms of their SCM strategies, and port actors, in terms of services provided. In this paper a framework is developed, which aims to improve mutual understanding between shippers and port actors from a SCM point of view. It thereby aims to contribute to the dialogue on how the port logistics system can be better integrated into shippers SCM strategies. Three SCM reference models are analysed and twelve SCM subsystems identified that represent broad design areas of shippers SCM strategies. Further, the seaport system is discussed in terms of system boundaries and the actors involved. Port actors and SCM subsystems are then combined into one explanatory framework, the SCM-port actor matrix. Finally, applying the matrix, three cases retrieved from academic and trade literature in which port actors are actively involved in conducting shippers supply chain strategies are discussed. The paper concludes with a brief outlook on future research needs. 2014 Document type: Article