Experimental study of a novel loop heat pipe with a vapor-driven jet injector and a boiling pool. (March 2022)

• Record Type: Journal Article
• Authors: Liu, Lei; Yuan, Bo; Yang, Xiaoping; Cui, Chenyi; Wei, Jinjia
• Is Part Of: International journal of heat and mass transfer. Volume 184(2022)
• Publication Date: 2022-03
• Subjects: Loop heat pipe -- Vapor-driven jet injector -- Pool boiling -- Heat leakage -- High heat flux; Heat -- Transmission -- Periodicals; Mass transfer -- Periodicals; Chaleur -- Transmission -- Périodiques; Transfert de masse -- Périodiques; Electronic journals; 621.4022
• DOI: 10.1016/j.ijheatmasstransfer.2021.122267
• Languages: English
• ISSNs: 0017-9310

Abstract

Highlights: A novel loop heat pipe with a vapor-driven jet injector and a boiling pool is proposed. The injector removes the heat leakage and provides liquid for the boiling pool. The boiling pool is the main heat dissipation component with high heat flux. The coupling relationship of the evaporator and the boiling pool is studied. Visualization study is carried out to reveal the operation mechanism of the novel loop heat pipe. Abstract: To remove the heat leakage in the compensation chamber (CC) and increase the maximum heat flux of the loop heat pipe, a novel loop heat pipe with a vapor-driven jet injector and a boiling pool (LHPIB) was proposed. The injector driven by the vapor from an evaporator was designed to remove the heat leakage and provide liquid for the boiling pool. The boiling pool was the main heat dissipation component where high heat flux was achieved. Comprehensive experimental research was conducted to evaluate the heat transfer performance of the LHPIB, and visualization study was carried out to reveal its operation mechanism. The results indicated that a timely liquid supply from the injector to the boiling pool was essential for a smooth startup. The LHPIB worked well under variable operating conditions and a new steady state was established quickly when the heat load changed. Maintaining the evaporator heat load at about 238 W, the maximum boiling pool heat load reached 507 W, with the corresponding heat flux up to 105 W·cm −2, which was higher than most of the conventional loop heat pipes. In general, the LHPIB is a promising candidate for heat dissipation of high heat flux and multi-heat sources. Graphical abstract: Image, graphical abstract