Capture of cold energy from liquid nitrogen using a brazed plate heat exchanger

Francesco Lonis, Yang Luo, John Andresen, Mercedes Maroto-Valer

Research output: Contribution to journalConference articlepeer-review

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Abstract

Energy use optimization is one of the numerous way to reduce the impact of the CO2 on the environment. The work presented in this paper explores the possibility to apply the Brazed Plate Heat Exchanger (BPHE) technology to enhance the heat transfer between an extremely cold liquid gas such as nitrogen or air and low-grade heat media such as hot water. BPHEs are known to be characterised by high turbulent flows and high heat transfer rate and thus are the best candidate to guarantee quick heat transfer between the two fluids. Particular concern in this application is given by the risk of freezing water inside the BPHE. Considering the high complexity in the internal structure of the BPHE, the work is based on its analysis using x-ray tomography and CFD via a commercial software. CFD analysis was carried out using a first simple geometry and physics to verify the feasibility of the study. Given the promising results (quick heat transfer and tempered water temperature), subsequent study will be focused on more complex geometry and realistic physics to acquire a comprehensive and exhaustive view of the problem.

Original languageEnglish
Pages (from-to)5622-5628
Number of pages7
JournalEnergy Procedia
Volume158
DOIs
Publication statusPublished - Feb 2019
Event10th International Conference on Applied Energy 2018 - Hong Kong, Hong Kong
Duration: 22 Aug 201825 Aug 2018

Keywords

  • Brazed plate heat exchanger
  • Liquid nitrogen
  • Low-grade heat recovery

ASJC Scopus subject areas

  • Energy(all)

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