Total industrial park site heat integration with waste heat utilization

JI Feng; SUN Xiaojing; LIU Linlin; DU Jian

doi:10.16511/j.cnki.qhdxxb.2021.25.009

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Journal of Tsinghua University(Science and Technology) ›› 2022, Vol. 62 ›› Issue (2) : 312-320. DOI: 10.16511/j.cnki.qhdxxb.2021.25.009

ENERGY AND POWER ENGINEERING

Total industrial park site heat integration with waste heat utilization

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Abstract

Integrated utility systems, heat exchanger networks (HEN), and refrigeration systems can significantly improve waste heat utilization in industrial parks. This paper presents a programmed approach for total site heat integration. A site heat integration model was developed that includes interactions between the inter-plant HEN, steam system, cooling water system, and absorption cooling (ARC) system and was formulated as a mixed-integer nonlinear programming (MINLP) model. In this model, steam generated from the hot process stream and the utility steam are used as a heat source to heat the cold stream and drive the ARC system. The cooling water and chilled water systems are then used as cooling sources to meet the cooling requirements of the ARC system and the hot stream. Analyses of three plants shows the effect of waste heat utilization on the total energy distribution at the site. The results show that this method significantly reduces the energy consumption and investment by making the overall system configuration more efficient.

Key words

industrial park / total site heat integration / heat exchanger network (HEN) / waste heat refrigeration / optimization

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JI Feng, SUN Xiaojing, LIU Linlin, DU Jian. Total industrial park site heat integration with waste heat utilization[J]. Journal of Tsinghua University(Science and Technology). 2022, 62(2): 312-320 https://doi.org/10.16511/j.cnki.qhdxxb.2021.25.009

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