Thermodynamic performance evaluation of a turbine-less jet engine integrated with solid oxide fuel cells for unmanned aerial vehicles

Ji, Zhixing; Qin, Jiang; Cheng, Kunlin; Dang, Chaolei; Zhang, Silong; Dong, Peng

doi:10.1016/j.applthermaleng.2019.114093

Cited by 30 publications

(15 citation statements)

References 50 publications

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“…The weighted sum of the combustor and motor makes up 20-30% total weight of the engine. In addition, the specific thrust of the engine under the highest combustion temperature in this work is about 1.7 kN/ (kg/s), which is higher than that in our previous paper of about 1.6 kN/(kg/s) (Ji et al, 2019a).…”

Section: Discussioncontrasting

confidence: 73%

“…When progress is made in fuel cells for the future, the power-weight ratio of HEFC engines will increase to a large degree. In addition, the specific thrust of the engine under the highest combustion temperature in this work is about 1.7 kN/(kg/s), which is higher than that in our previous paper of about 1.6 kN/(kg/s) under the same operating conditions (Ji et al, 2019a).…”

Section: Parameterscontrasting

confidence: 72%

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Design and Performance of a Compact Air-Breathing Jet Hybrid-Electric Engine Coupled With Solid Oxide Fuel Cells

Qin

Cheng

et al. 2021

Front. Energy Res.

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A compact air-breathing jet hybrid-electric engine coupled with solid oxide fuel cells (SOFC) is proposed to develop the propulsion system with high power-weight ratios and specific thrust. The heat exchanger for preheating air is integrated with nozzles. Therefore, the exhaust in the nozzle expands during the heat exchange with compressed air. The nozzle inlet temperature is obviously improved. SOFCs can directly utilize the fuel of liquid natural gas after being heated. The performance parameters of the engine are acquired according to the built thermodynamic and mass models. The main conclusions are as follows. 1) The specific thrust of the engine is improved by 20.25% compared with that of the traditional jet engine. As pressure ratios rise, the specific thrust increases up to 1.7 kN/(kg·s−1). Meanwhile, the nozzle inlet temperature decreases. However, the temperature increases for the traditional combustion engine. 2) The power-weight ratio of the engine is superior to that of internal combustion engines and inferior to that of turbine engines when the power density of SOFC would be assumed to be that predicted for 2030. 3) The total pressure recovery coefficients of SOFCs, combustors, and preheaters have an obvious influence on the specific thrust of the engine, and the power-weight ratio of the engine is strongly affected by the power density of SOFCs.

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Section: Discussioncontrasting

confidence: 73%

Section: Parameterscontrasting

confidence: 72%

Design and Performance of a Compact Air-Breathing Jet Hybrid-Electric Engine Coupled With Solid Oxide Fuel Cells

Qin

Cheng

et al. 2021

Front. Energy Res.

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“…In summary, due to fuel recovery and heat reuse, the efficiency of the IEC and fuel cell series hybrid system is relatively higher than that of the traditional pure fuel cell propulsion system. In addition, the thermal efficiency, specific thrust, and impulse of the hybrid power system also have obvious advantages over traditional turbojet engines [37], [38]. However, due to the existence of IEC engines, greenhouse gases, and other harmful gases will still be produced.…”

Section: B Series Hybrid Power Systemmentioning

confidence: 99%

A Comprehensive Review on Fuel Cell UAV Key Technologies: Propulsion System, Management Strategy, and Design Procedure

Huangfu

et al. 2022

IEEE Trans. Transp. Electrific.

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Unmanned aerial vehicles (UAVs) can be regarded as one of the most emerging technologies. Compared with piloted aerial vehicles, UAVs qualify for higher safety and lower cost, and they are more suitable for dangerous missions. Recently, fuel cell UAVs have obtained more and more attention due to their relatively higher energy density. However, their propulsion system still needs to be further improved to meet different requirements of performing difficult tasks. This article aims to give a comprehensive review of the key technologies of fuel cell UAVs. Firstly, various architectures of the propulsion system and corresponding advantages and disadvantages are introduced. Then, three kinds of management strategies for fuel cell UAVs are reviewed. Next, some special applications and considered design procedures are summarized. Compared with other review papers, this paper tries to cover more aspects of fuel cell UAVs. Since these aspects have a tight relationship with each other, giving a comprehensive review can be more beneficial to us to understand the state-of-the-art development of propulsion systems for fuel cell UAVs. The conclusions show that advanced propulsion architectures, efficient online energy management strategies, and professional design procedures are still in urgent demand in the commercial process of fuel cell UAVs.

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“…The results demonstrated a significant improvement of the turbine-less engine in terms of specific impulse and specific thrust. In their further researches, they have evaluate the performance of the SOFC hybrid jet engine while considering the effect of pressure ratio and flight altitude [66], the pressure ratios, combustor exit temperature, flight Mach number and flight altitude [70], and fuel types [71], as well as other studies in the safe operating zone [72] and exergy [73].…”

Section: Fuel Cell -Conventional Jet Engine Hybridisationmentioning

confidence: 99%

Investigation of the Challenges and Issues of Hydrogen and Hydrogen Fuel Cell Applications in Aviation

Zhang¹,

Maddy²

2021

Preprint

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<div>Aviation is an vital global industry that generates economic growth, creates jobs and facilitates national and international trade and tourism. During the Covid-19 pandemic, the world had seen a sharp decline in commercial air travel due to the worldwide travel restrictions, lock-down orders and widespread fear of infection. However, there is a rapid increase in the use of UAVs for surveillance, communication, delivery and transport. And the aviation industry is believed to be able to provide valid contribution to the post-pandemic economic recovery. In order to reduce the carbon emission from aviation industry, there is a requirement for more electric aircraft. Hydrogen and fuel cell system's capability of creating a clean road transportation have been widely tested. In this paper, the status of hydrogen and fuel cell utilised in aviation is reviewed, and the challenges and issues are identified for a better integration of the hydrogen and fuel cell system in aviation.</div>

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Thermodynamic performance evaluation of a turbine-less jet engine integrated with solid oxide fuel cells for unmanned aerial vehicles

Cited by 30 publications

References 50 publications

Design and Performance of a Compact Air-Breathing Jet Hybrid-Electric Engine Coupled With Solid Oxide Fuel Cells

Design and Performance of a Compact Air-Breathing Jet Hybrid-Electric Engine Coupled With Solid Oxide Fuel Cells

A Comprehensive Review on Fuel Cell UAV Key Technologies: Propulsion System, Management Strategy, and Design Procedure

Investigation of the Challenges and Issues of Hydrogen and Hydrogen Fuel Cell Applications in Aviation

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