2017, Volume 19, Issue 3
Strategic Study of CAE >> 2017, Volume 19, Issue 3 doi: 10.15302/J-SSCAE-2017.03.012
A Study on the Essence of Process Manufacturing
1. Center for Industrial Ecology, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China;
2. Central Iron and Steel Research Institute, Beijing 100081, China
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Abstract
Process manufacturing is an important pillar of China's economic development, and its orderly and healthy development is of great significance to China’s economic and social development. However, the development of process manufacturing is constrained by its enormous consumption of resources and energy and its serious environmental impact. To reach a deeper understanding of the future development of process manufacturing, this study extends an analytical perspective from a single industry to all forms of process manufacturing. Based on the concepts of thermodynamics and entropy, this study analyzes the essence of process manufacturing. Three groups of key factors are used to build the analysis framework: flow and process; material, energy, and information; and scale and efficiency. A chemical engineering process and a phosphorus chemical process are then analyzed using this framework. The results show that the fundamental direction of the development of process manufacturing is to minimize the entropy increments of the whole system, rather than only those of the process system, while ignoring the entropy increments of the system of the external environment. In order to minimize the entropy increments of the whole system, it is necessary not only to pay attention to the economic benefits of the process system, but also to improve resource, energy, and environmental efficiency. To improve efficiency, the technology involved requires improvement, upgrading, and innovation. Improving and upgrading the technology can slightly improve the efficiency of a process system, while revolutionary innovation in the technology may greatly improve the efficiency.
Keywords
process manufacturing ; entropy ; process system ; essence ; essential characteristic
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