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首页> 外文会议>Solid-state sensor and actuator workshop : Technical digest >A SILICON HEAT EXCHANGER WITH INTEGRATED INTRINSIC-POINT HEATERDEMONSTRATED IN A MICROPROPULSION APPLICATION
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A SILICON HEAT EXCHANGER WITH INTEGRATED INTRINSIC-POINT HEATERDEMONSTRATED IN A MICROPROPULSION APPLICATION

机译：集成内点加热器的硅换热器 r n已在微推进应用中演示

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摘要

Efficient heating of a fluid is demonstrated using a novel heatrnexchanger in which bulk silicon forms both the heater structurernand the resistive heating elements. Current passed through thernheater raises the temperature of the heater fins and this energy isrntransferred to a fluid flowing between adjacent fins. By exploitingrnthe change in sign of the temperature coefficient of resistivity ofrnthe heavily doped silicon, the temperature of the system is stablyrnmaintained at the intrinsic point. A heat exchanger of this nature isrnintegrated with a nozzle, resulting in a microthruster with elevatedrnchamber temperature, which greatly improves the specific impulse,rnor thrust per unit weight flow of propellant. A numerical model isrnpresented to optimize the heater design. Benchtop testsrndemonstrate the inherent stability of the intrinsic point heaterrndesign while thrust tests demonstrate the improved fuel economyrnof the micropropulsion system.
机译：使用新型换热器证明了流体的高效加热，在这种换热器中，大块硅既形成了加热器结构，又形成了电阻加热元件。流过加热器的电流升高了散热片的温度，该能量被转移到相邻散热片之间流动的流体中。通过利用重掺杂硅的电阻率温度系数的符号变化，可以将系统温度稳定地保持在本征点。这种性质的热交换器与喷嘴集成在一起，从而导致微推力器的腔室温度升高，从而大大提高了单位重量推进剂的比冲量或推力。给出了数值模型以优化加热器设计。台式试验证明了本征点加热器设计的固有稳定性，而推力试验证明了微推进系统的燃油经济性得到了改善。

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