CAJ | 학술논문

针对甲醇汽化潜热大，蒸发困难，纯甲醇发动机冷起动困难的问题，开发了一套甲醇加热器来改善甲醇汽化问题。通过PTC热敏电阻加热片给蒸发器提供热量，使蒸发器温度升高。为防止初始加热电流过大，加热用的16个热敏电阻被分成4组，依次间隔30 s通电加热。冷起动时控制PTC对甲醇蒸发器加热，当蒸发器内温度达到一定值后起动发动机。试验结果表明，环境温度1℃时，加热器加热到80℃以上即可实现甲醇机的顺利起动。
침대갑순기화잠열대，증발곤난，순갑순발동궤랭기동곤난적문제，개발료일투갑순가열기래개선갑순기화문제。통과PTC열민전조가열편급증발기제공열량，사증발기온도승고。위방지초시가열전류과대，가열용적16개열민전조피분성4조，의차간격30 s통전가열。랭기동시공제PTC대갑순증발기가열，당증발기내온도체도일정치후기동발동궤。시험결과표명，배경온도1℃시，가열기가열도80℃이상즉가실현갑순궤적순리기동。
For the difficult cold start of methanol engine ,methanol with difficult evaporation caused by the large latent heat , a heater was developed to improve the methanol vaporization .PTC thermal resistor was used to heat the evaporator .In order to avoid the initial large current ,16 thermal resistors were divided into 4 groups and heated the evaporator every other 30 s in turn .During the cold start ,the methanol evaporator was heated by PTC ,when its temperature reached a certain value ,engine was easy to start .The results show that methanol engine can start successfully when the temperature of evaporator reaches 80 ℃ in the environment of 1 ℃ .