Design and performance analysis of the array scroll hydrogen recirculation pump

doi:10.3969/j.issn.1674-8484.2022.04.017

Abstract

Abstract:

A structure scheme of array scroll was proposed based on asymmetric single arc modification to meet the requirements of the compact and large-displacement design of scroll Hydrogen Recirculation-Pump (HRP) in fuel cell hydrogen supply system. The parametric design and modeling were carried out for the HRP with double scrolls and triple scrolls. Two-dimensional Computational Fluid Dynamics (CFD) overset-mesh method was used to analyze the effects of the rotating speed and pressure rise on the performances of double-scrolls HRP, and the performance differences between the double scrolls HRP and the triple-scrolls HRP were compared. The results show that the pressure and temperature uniformity of triple-scrolls HRP is better. The performance of the double-scrolls HRP and the triple-scrolls HRP are greatly improved with the increasing rotating speeds or the decreasing pressure rising, the efficiency continues to drop by about 30% and 40% respectively when the pressure rises increase from 20 kPa to 100 kPa at design speed, and the tangential leakage and hydrogen backflow have a great impact on the performances of HRP. Under the requirements of design displacement and volume, the performances of the double scrolls HRP are better than that of the triple scrolls HRP, and the maximum efficiency difference is about 19%.

Key words: fuel cells, hydrogen supply systems, scroll hydrogen recirculation pumps (HRPs), array scroll wraps, overset-mesh, aerodynamic performances

CLC Number:

U463.99

WANG Han, SONG Panpan, WEI Mingshan, LU Zhenbo, LI Jianwei, ZHUGE Weilin, ZHANG Yangjun. Design and performance analysis of the array scroll hydrogen recirculation pump[J]. Journal of Automotive Safety and Energy, 2022, 13(4): 760-769.

Figures/Tables 21

References 21

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基圆半径， R_b	4.16 mm
发生角， α	0.37 rad
起始展角， φ_s	1.508 rad
结束展角， φ_e	11.655 rad
偏心距， R_or	3.40 mm
径向间隙， C_r	40 μm
齿高， h	27.50 mm
齿厚， t	3.10 mm
节距， P_t	13.08 mm
涡盘直径， D_m	120.30 mm

基圆半径， R_b	4.16 mm
发生角， α	0.37 rad
起始展角， φ_s	1.508 rad
结束展角， φ_e	11.655 rad
偏心距， R_or	3.40 mm
径向间隙， C_r	40 μm
齿高， h	27.50 mm
齿厚， t	3.10 mm
节距， P_t	13.08 mm
涡盘直径， D_m	120.30 mm

	转速, n /（100 r·min^-1）	进口压力, p_in / kPa	进口温度, T / K	出口压力, p_out / kPa
设计工况	40	160	350	180
模拟工况点	30、40、50	160	350	180、200、220、240、260

	转速, n /（100 r·min^-1）	进口压力, p_in / kPa	进口温度, T / K	出口压力, p_out / kPa
设计工况	40	160	350	180
模拟工况点	30、40、50	160	350	180、200、220、240、260