Realization of Thermal Inertia in Frequency Domain

Entropy

Boe-Shong Hong¹ 

关键词: thermal inductance;    electro-thermal analogy;    renewable energy;    non-Fourier heat transfer;    2D classical control;   

DOI  :  10.3390/e16021101

来源: mdpi

【 摘 要 】

To realize the lagging behavior in heat conduction observed in these two decades, this paper firstly theoretically excludes the possibility that the underlying thermal inertia is a result of the time delay in heat diffusion. Instead, we verify in experiments the electro-thermal analogy, wherein the thermal inertial is parameterized by thermal inductance that formulates hyperbolic heat-conduction. The thermal hyperbolicity exhibits a special frequency response in Bode plot, wherein the amplitude ratios is kept flat after crossing some certain frequency, as opposed to Fourier heat-conduction. We apply this specialty to design an instrument that reliably identifies thermal inductances of some materials in frequency domain. The instrument is embedded with a DSP-based frequency synthesizer capable of modulating frequencies in utmost high-resolution. Thermal inertia implies a new possibility for energy storage in analogy to inductive energy storage in electricity or mechanics.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland