An energy-saving bottleneck diagnosis method for industrial system applied to circulating cooling water system. (20th September 2019)

• Record Type: Journal Article
• Authors: Zhu, Xiaochen; Wang, Fuli; Niu, Dapeng; Guo, Yuming; Jia, Mingxing
• Is Part Of: Journal of cleaner production. Volume 232(2019)
• Page Start: 224
• Page End: 234
• Publication Date: 2019-09-20
• Subjects: Energy-saving retrofit -- Industrial system -- Energy-saving bottleneck diagnosis -- Energy efficiency density decomposition -- Orthogonal test -- Circulating cooling water system; Factory and trade waste -- Management -- Periodicals; Manufactures -- Environmental aspects -- Periodicals; Déchets industriels -- Gestion -- Périodiques; Usines -- Aspect de l'environnement -- Périodiques; 628.5
• DOI: 10.1016/j.jclepro.2019.05.322
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: Research on energy-saving retrofits of the existing industrial systems can effectively improve the systems' energy-saving level and increase company revenue. The energy-saving bottleneck diagnosis for systems is the foundation of the energy-saving retrofit design. The diagnosis also aims to yield a more targeted energy-saving retrofit, thus ensuring the energy-saving effect and investment income of the transformation project. Therefore, this paper proposes a new method to diagnose the energy-saving bottleneck of the existing industrial systems. First, the energy-saving bottleneck diagnosis is decomposed into two parts: the diagnosis of energy-saving bottleneck units and the diagnosis of energy-saving bottleneck factors. Then, the energy density decomposition method is improved and a multi-mode energy efficiency density decomposition method is proposed. Next, an energy-saving bottleneck diagnosis method for industrial systems based on multi-mode energy efficiency density decomposition and an orthogonal test method is proposed. The proposed method can analyze the energy-saving potential of existing systems, accurately locate energy-saving bottlenecks, and avoid the dependence on a large amount of expert experience or complete production data in the existing methods. Finally, the proposed method is applied to an actual circulating cooling water system and the system energy-saving bottleneck diagnosis is realized, thus verifying the practicability of the method. Highlights: Energy-saving bottlenecks in industrial systems are analyzed and decomposed. A method for energy-saving bottleneck diagnosis from two directions is proposed. An improved energy efficiency density decomposition method is proposed. The diagnosis of energy-saving bottlenecks in industrial systems is achieved. The verification is performed for an industrial circulating cooling water system.