Author
Jiang Zou
Bio: Jiang Zou is an academic researcher from Zhejiang University. The author has contributed to research in topics: Thermoacoustics & Thermoacoustic heat engine. The author has an hindex of 5, co-authored 7 publications receiving 136 citations.
Papers
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TL;DR: In this article, the acoustic impedance requirements of the traveling-wave thermoacoustic engine and linear alternators to reach an efficient and powerful operation state were studied quantitatively based on the decoupling method and theoretical analysis.
47 citations
TL;DR: In this article, a traveling-wave thermoacoustic electric generator capable of generating about 500 W electric power is studied numerically and experimentally, and the performances and the operating characteristics of the system under different working conditions are tested and analyzed.
39 citations
TL;DR: In this paper, an effective approach for matching the acoustic impedances of the thermoacoustic engine and the linear alternators for maximizing the output electric power and thermal-to-electric efficiency was presented.
36 citations
TL;DR: In this paper, a one-dimensional time-domain network model for predicting the onset characteristics of traveling-wave thermoacoustic engines with helium as working gas is built, where acoustic resistance, inertance, compliance, and thermal-relaxation effects of all the acoustic components are included.
35 citations
TL;DR: Based on computational fluid dynamics (CFD) method, the onset process of Taconis oscillation with low temperature hydrogen at atmospheric pressure as working gas is first simulated in this article, where it is shown that a standing-wave acoustic field operating at 91 Hz starts spontaneously and finally develops to a saturation state in the Taconsis tube with length and inner diameter of 1.m and 0.01m respectively.
15 citations
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TL;DR: In this article, a review of the research development of Stirling cycle engines for recovering low and moderate temperature heat is presented, which includes four types of engines: kinetic, thermoacoustic, free-piston, and liquid piston types.
Abstract: A review is presented for the research development of Stirling cycle engines for recovering low and moderate temperature heat. The Stirling cycle engines are categorized into four types, including kinetic, thermoacoustic, free-piston, and liquid piston types. The working characteristics, features, technological details, and performances of the related Stirling cycle engines are summarized. Upon comparing the available experimental results and the technology potentials, the research directions and the possible applications of different Stirling cycle engines are further discussed and identified. It is concluded that kinetic Stirling engines and thermoacoustic engines have the greatest application prospect in low and moderate temperature heat recoveries in terms of output power scale, conversion efficiency, and costs. In particular, kinetic Stirling engines should be oriented toward two directions for practical applications, including providing low-cost solutions for low temperatures, and moderate efficient solutions with moderate costs for medium temperatures. Thermoacoustic engines for low temperature applications are especially attractive due to their low costs, high efficiencies, superior reliabilities, and simplicities over the other mechanical Stirling engines. This work indicates that a cost effective Stirling cycle engine is practical for recovering small-scale distributed low-grade thermal energy from various sources.
166 citations
TL;DR: In this paper, a traveling-wave thermoacoustic electric generator is proposed, which consists of a multi-stage traveling wave thermo-acoustic heat engine and linear alternators, which is capable of converting thermal energy to acoustic power with advantage of heat source flexibility, reliability and efficiency.
96 citations
TL;DR: In this paper, a Y-shaped bi-stable energy harvester (YBEH) was proposed to scavenge the low-speed wind energy, which is composed of a cantilever beam with a tip magnet and two curved wings.
70 citations
TL;DR: In this article, a bi-stable acoustic energy harvester (BAEH) is proposed to scavenge noise energy, which is composed of a piezoelectric cantilever beam with a flat plate attaching at the free end, a curved plate, a movable magnet and a fixed magnet.
57 citations
TL;DR: A review of the four main methods to convert the (thermo)acoustic power into electricity is provided in this article, focusing on possible configurations, operating characteristics, output performance, and analytical and numerical methods to study the devices.
Abstract: Thermoacoustic engines convert heat energy into high amplitude acoustic waves and subsequently into electric power. This article provides a review of the four main methods to convert the (thermo)acoustic power into electricity. First, loudspeakers and linear alternators are discussed in a section on electromagnetic devices. This is followed by sections on piezoelectric transducers, magnetohydrodynamic generators, and bidirectional turbines. Each segment provides a literature review of the given technology for the field of thermoacoustics, focusing on possible configurations, operating characteristics, output performance, and analytical and numerical methods to study the devices. This information is used as an input to discuss the performance and feasibility of each method, and to identify challenges that should be overcome for a more successful implementation in thermoacoustic engines. The work is concluded by a comparison of the four technologies, concentrating on the possible areas of application, the conversion efficiency, maximum electrical power output and more generally the suggested focus for future work in the field.
53 citations