Design of a Software for the Construction of Heat Distribution Networks with Concentrated Solar Thermal Integration Based on Pinch and Exergy Analyses

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2019

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İnce, Murat Ekin

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Searching for a sustainable solution for industry, one of the common strategies is using a Heat Distribution Network (HDN). Pinch Analysis is a common methodology to calculate the pinch point and minimum hot and cold external utilities for a HDN, which then serve as inputs to Pinch Design to build a robust HDN. Pinch Analysis and Design can be supplemented with exergy analysis to identify locations in a HDN with the largest potentials to improve thermodynamic performance. Additionally, Concentrating Solar Thermal (CST) can be used as a sustainable hot utility for a HDN. While automated Pinch Analysis and Design tools exist, they are closed and do not include or allow for exergy analysis or CST integration. In this thesis a new open-source tool called Pinch Concentrated Solar Thermal Exergy Tool (PCSTET) is presented. The tool uses subfunctions for pinch analysis, creation of the HDN including automatic splitting and division of streams, optimization, and plots of HDN diagrams. PCSTET is benchmarked using common examples from the literature and good agreement is found. Additionally, a case study from the literature is analyzed with PCSTET. The optimization results in a 47.7% decrease in exergy destruction as v well as 87.7% reduction in cold utility and 38.2% increase in hot utility requirements. The dependency of exergy destruction reduction and the number of heat exchangers (HEX) is also investigated. Results show that there is no association between the number of HEXs and the amount of exergy destruction. The outputs of PCSTET are intended to be synthesized with other inputs by an expert HDN designer to yield high-performing HDNs.

Subject Keywords

Solar energy., Heat Distribution Network, Pinch Analysis, Exergy, Industrial Parks.

URI

http://etd.lib.metu.edu.tr/upload/12623989/index.pdf
https://hdl.handle.net/11511/44825

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

M. E. İnce, “Design of a Software for the Construction of Heat Distribution Networks with Concentrated Solar Thermal Integration Based on Pinch and Exergy Analyses,” Thesis (M.S.) -- Graduate School of Natural and Applied Sciences. Mechanical Engineering., Middle East Technical University, 2019.