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Indexed by:期刊论文

Date of Publication:2019-04-01

Journal:APPLIED THERMAL ENGINEERING

Included Journals:SCIE、EI

Volume:152

Page Number:634-642

ISSN No.:1359-4311

Key Words:Pipeline natural gas; Pressure regulating; Ranque-Hilsch vortex tube; Ejector; Energy saving

Abstract:In this work, a novel pressure-driven heating system with a Ranque-Hilsch vortex tube and ejector to recover pressure losses and absorb energy from the ambient environment to heat pipeline natural gas (PNG) is proposed to take the place of the conventional heating system with a boiler. A vortex tube to produce the high-temperature and low-temperature streams simultaneously with its energy separation effect and an ejector to drive the internal subcycle within the system to heat the low-temperature stream by the ambient air are installed. They regulate the PNG pressure and absorb heat from the ambient air while maintaining simplicity and reliability. To study the performance of this new system, an analogical experimental rig was established with pressurised air as the working fluid. The experimental results verified the heating capacity of the system, in which a significant temperature rise greater than 9 K was obtained with a small pressure drop of approximately 1.0 MPa. Compared with a sole throttling valve, an energy-saving ratio of no less than 0.35 was achieved.