Energy, exergy, economic, and environmental analysis of an integrated system of high-temperature heat pump and gas separation unit

Research output: Contribution to journalJournal article – Annual report year: 2019Researchpeer-review

  • Author: Li, Xiaoqiong

    Tianjin University, China

  • Author: Zhang, Yufeng

    Tianjin University, China

  • Author: Fang, Lei

    Indoor Environment, Department of Civil Engineering, Technical University of Denmark, Nils Koppels Allé, 2800, Kgs. Lyngby, Denmark

  • Author: Jin, Zhendong

    Shandong Chambroad Petrochemicals Co. Ltd., China

  • Author: Zhang, Yan

    Tianjin University, China

  • Author: Yu, Xiaohui

    Hebei University of Technology, China

  • Author: Ma, Xuelian

    Tianjin University, China

  • Author: Deng, Na

    Tianjin University, China

  • Author: Wu, Zhangxiang

    Tianjin University, China

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A novel integrated system consisting of a high-temperature heat pump providing 120–130 °C heat and a gas separation unit was developed to recover the industrial waste heat and replace the low-pressure steam used in traditional refinery process. An energy, exergy, economic, and environmental analysis was carried out to evaluate the performance of such integrated system according to its operational data of the project. Energy and exergy analyses provide an insight into the quantity and quality of the energy conversion of the integrated system. The results show that the coefficient, which evaluates the performance of the system in a stable operation mode, are 8.05 and 4.45 in the presence and absence of the waste heat recovery mechanism, respectively. The total exergy efficiency decreases from 34.57% to 33.03% in the ambient temperature range of −10–40 °C. When an electricity price of 0.109 $/kW·h and a steam price of 22.361 $/t are considered, the annual net profit of the integrated system measures a minimum of 187.4*103 $/year and 169.8*103 $/year, the payback period measures a maximum of 2.21 years and 2 years, with and without considering the penalty cost induced by emission reductions. Assuming a 8000 h/year operating time, the reduction of CO2, SO2, and NOx emissions reaches 3348 t, 101 t, and 50 t, respectively. These results indicate that the integrated system operates with a high performance and provides significant economic and environmental benefits.
Original languageEnglish
Article number111911
JournalEnergy Conversion and Management
Number of pages10
Publication statusPublished - 2019
CitationsWeb of Science® Times Cited: No match on DOI

    Research areas

  • Economic analysis, Energy analysis, Environmental analysis, Exergy analysis, Gas separation unit, High-temperature heat pump

ID: 191606845