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A new self-driven loop heat pipe used in HVAC systems: feasibility analysis.

Number: pap. n. 533

Author(s) : YANG X., ZHANG P., LI X., et al.

Summary

Two-phase thermosyphon loop (TPTL) has been widely used in industrial applications for energy conservation. However, the circulation of two-phase thermosyphon depends on the gravity, and the condenser must be higher than the evaporator by a certain height, which brings about significant difficulties in design and application. In this paper, a self-driven loop heat pipe (SDLHP) without the assistance of gravity is proposed. The working principle of SDLHP is described, and a performance simulation model has been developed. Based on the model, heat transfer rate, mass flux, the mass distribution of the working fluid, thermal resistance distribution and the flow parameters along the loop of SDLHP are simulated and compared to a traditional TPTL without height difference. The simulation results show, compared to the traditional TPTL without height difference, by utilizing the thermal potential difference between the heat source and the heat sink to generate driving force, SDLHP can enhance the circulation flow to optimize the refrigerant distribution in the evaporator and the condenser, and the heat performance improves significantly. Meanwhile, based on a theoretical analysis, the proposed SDLHP is thermodynamically feasible. Because of no need for the height difference, the SDLHP greatly expands the application of heat pipes in various industrial applications.

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Pages: 10

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Details

  • Original title: A new self-driven loop heat pipe used in HVAC systems: feasibility analysis.
  • Record ID : 30026452
  • Languages: English
  • Source: Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
  • Publication date: 2019/08/24
  • DOI: http://dx.doi.org/10.18462/iir.icr.2019.0533

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