A Framework for Design and Operation Optimization for Utilizing Low-Grade Industrial Waste Heat in District Heating and Cooling

Lingwei Zhang, Yufei Wang and Xiao Feng
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Lingwei Zhang: State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
Yufei Wang: State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
Xiao Feng: School of Chemical Engineering & Technology, Xi’an Jiaotong University, Xi’an 710049, China

Energies, 2021, vol. 14, issue 8, 1-21

Abstract: In the process industry, a large amount of low-grade waste heat is discharged into the environment. Furthermore, district heating and cooling systems require considerable low-grade energy. The integration of the two systems has great significance for energy saving. Because the energy demand of consumers varies in periods, the design and operation of an industrial waste heat recovery system need to match with the fluctuations of district energy demand. However, the impact of the periodic changes on the integration schemes are not considered enough in existing research. In this study, a framework method for solving above problem is proposed. Industrial waste heat was integrated with a district heating and cooling system through a heat recovery loop. A three-step mathematical programming method was used in design and operation optimization for multiperiod integration. A case study was conducted, and the results show that the multiperiod optimization method can bring significant benefits to the system. By solving the mixed integer nonlinear programming model, the optimal operation plans of the integration in different periods can be obtained.

Keywords: waste heat; district heating and cooling; Heat Integration; multiperiod (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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