CAJ | 학술논문

采用有限差分法对脉冲电压驱动下的瞬态热电效应及其动态特性过程进行了理论分析，探索了非稳态工况下帕尔帖效应、焦耳热效应与傅里叶导热效应之间的耦合关系及其关键制约因素对制冷性能的影响规律，进而探讨了脉冲驱动强化热电制冷性能的作用机理。分析结果得到，在合理电压域值内采用主动控制方法，对热电模块周期性施加数倍于稳态工况理想电压的脉冲突变电压，有益于充分利用帕尔贴制冷效应而推迟出现以焦耳热和傅里叶热耗散形式为主的内部热积聚对热电模块冷端引起的负效应，并能瞬态实现冷端面的制冷强化作用和最大程度实现输入电能的有效转换。该结论不仅为进一步提出脉冲驱动模式的优化控制策略提供了理论依据，也为瞬态热电制冷效应的应用开辟了一条新思路。
채용유한차분법대맥충전압구동하적순태열전효응급기동태특성과정진행료이론분석，탐색료비은태공황하파이첩효응、초이열효응여부리협도열효응지간적우합관계급기관건제약인소대제랭성능적영향규률，진이탐토료맥충구동강화열전제랭성능적작용궤리。분석결과득도，재합리전압역치내채용주동공제방법，대열전모괴주기성시가수배우은태공황이상전압적맥충돌변전압，유익우충분이용파이첩제랭효응이추지출현이초이열화부리협열모산형식위주적내부열적취대열전모괴랭단인기적부효응，병능순태실현랭단면적제랭강화작용화최대정도실현수입전능적유효전환。해결론불부위진일보제출맥충구동모식적우화공제책략제공료이론의거，야위순태열전제랭효응적응용개벽료일조신사로。
Based on a numerical solution involving ti me-dependent imposed square voltage pulse and time-dependent thermal boundary conditions, the transient supercooling behavior was theoretically analyzed, as well as the response to the pulse operation parameters during the periods of pulse start-up, pulse-on time and pulse-off time, which was served as a theoretical basis for exploiting the coupling interaction of the thermoelectric effects (Peltier cooling effect, Joule heating effect and Fourier thermal effect) on the heat diffusion in the short time scale. The results indicate that, the transient thermoelectric supercooling effect can be enhanced by keeping on increasing the Peltier cooling effect as the additional cooling capacity for a period long enough against the earlier arrival of the excessively the Joule heating effect and Fourier heat conduction effect arriving at the cold junction, in which a transient cold spike can be produced by superimposing an additional shaped voltage pulse of the reasonable range on the original steady-state optimum value. The discussions may not only facilitate to put forward the theory basis for the optimization control strategy on pulse mode, but also develop a new method of transient supercooling effect for application in TE devices.