Thermodynamic performance analyses and collaborative optimization for a novel integrated energy system coupled with organic Rankine cycle. (1st December 2020)

• Record Type: Journal Article
• Authors: Wu, Di; Liu, Zhijian; Han, Zhonghe; Zhang, Han; Ma, Fanfan; Zhang, Shicong; Yang, Xinyan; Ge, Hua
• Is Part Of: Energy conversion and management. Volume 225(2020)
• Publication Date: 2020-12-01
• Subjects: Integrated energy system -- Organic Rankine cycle -- Collaborative optimization method -- Annual total cost -- Thermodynamic performances; Direct energy conversion -- Periodicals; Energy storage -- Periodicals; Energy transfer -- Periodicals; Énergie -- Conversion directe -- Périodiques; Direct energy conversion; Periodicals; 621.3105
• DOI: 10.1016/j.enconman.2020.113484
• Languages: English
• ISSNs: 0196-8904

Abstract

Highlights: A novel IES-ORC system is proposed based on cascade energy utilization principles. Thermodynamic performance variations are explored by parametric analysis. A collaborative optimization method is proposed for minimum annual total cost. Cost composition, energy balances and decision variable variations are investigated for a case study. Abstract: Integrated energy system (IES) coupled with organic Rankine cycle (ORC) system has potential to improve its own thermodynamic performances. Therefore, a novel IES-ORC system is proposed in this paper. Its novelty is that an absorption heat pump (AHP) and an ORC subsystem are arranged in parallel behind the internal combustion engine (ICE), which could flexibly adjust the power and cold produced. Moreover, the exhaust smoke heat from ICE is successively recovered by ORC, AHP and heat exchanger, according to cascade energy utilization principles. The advantages of the IES-ORC system are exhibited through the comparison. On the basis, the effect of several important parameters on thermodynamic performances is explored through parametric analysis. Further, a collaborative optimization method for optimizing system configuration and operation is proposed, and applied to a commercial building. As a result, the annual cost per unit area of the IES-ORC system is about 166.7 yuan/m 2 in a typical year. Moreover, the IES-ORC system can adjust the output electric-heat ratio through the ORC subsystem, decreasing the produced waste heat and increasing the exergy efficiency. Therefore, the novel IES-ORC system is reliable and feasible, in terms of various energy provisions for users, and the collaborative optimization method can realize the cost-oriented design for system configuration and operation.