A fuel oil integrated thermal management system and its working method

Abstract

The invention discloses a fuel oil comprehensive thermal management system and a working method thereof, comprising a fuel transfer tank, a fuel supply tank, an engine system, a plate heat exchanger and a liquid nitrogen system. It is discharged from the sink, and the regenerative fuel is formed after actively cooling the onboard equipment; another part of the fuel is transported to the engine system as a heat source; the plate heat exchanger includes a hot side channel and a cold side channel, and the regenerative fuel enters the hot side channel of the plate heat exchanger, The liquid nitrogen system pipeline is connected to the cold side channel to cool the regenerative fuel; the liquid nitrogen absorbs the heat emitted by the regenerative fuel into nitrogen and automatically separates from the fuel, the nitrogen enters the fuel supply tank for inerting, and the regenerative fuel is cooled and returned to the The fuel supply tank forms a closed loop system. The invention can effectively control the temperature when the hot fuel oil is returned to the fuel supply tank, and can restrain the spontaneous combustion of the high-temperature fuel oil, thereby improving the stability and safety of the system operation.

Description

technical field [0001] The invention relates to the field of aircraft airborne electromechanical systems, in particular to a fuel integrated thermal management system and a working method thereof. Background technique [0002] Aircraft thermal management refers to ensuring the safety of aircraft by controlling the generation, dissipation and recycling of thermal energy. With the development of aviation technology and the continuous improvement of aircraft performance, advanced aircraft use a large number of highly integrated electronic devices, and their heat dissipation requirements continue to rise; this is especially true for aircraft at high Mach numbers and even hypersonic speeds, where the complex thermal environment and design requirements present challenges to the development of thermal management systems. [0003] At present, the aircraft integrated thermal management technology is one of the main functions of the aircraft energy management system. The heat load of...

AI Technical Summary

Problems solved by technology

However, when the flight speed is further increased, the temperature of the ram air and the surface of the wing will also increase accordingly, which cannot effectively reduce the temperature of the fuel or even have a negative effect, that is to say, the ram air and the aircraft wing cannot provide the cooling fuel required cooling capacity

The traditional technology uses ram air as an auxiliary cooling source. Under high Mach number (Ma>2) flight conditions, the temperature of the ram air rises sharply, and it has lost the possibility of effectively cooling the fuel in the hot fuel tank. If it continues to be used as an auxiliary cooling source, Not only does it fail to reduce the temperature of the fuel flowing back to the hot tank, but it may also pose a risk of spontaneous combustion in the fuel supply tank

[0004] Therefore, for the complex thermal environment of the aircraft, the traditional heat protection technology or a single technology cannot meet the thermal management requirements. It is necessary to develop an efficient thermal management system based on the characteristics of the existing technology and the research status to realize the heat dissipation and recovery of the aircraft. Integrated management and efficient control of reuse

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