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Bistability in radiative heat exchange

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The possibility of a bistable regime in systems with radiative heat exchange is theoretically demonstrated for the first time. The transfer characteristics of a radiation-closed stationary system have been calculated, in which the radiator is a blackbody and the absorber is made of a material with the absorptivity sharply increasing in a certain temperature interval. The radiator and absorber are separated by a vacuum gap. The heat exchange between the system and the environment is controlled by varying the flow rate of a heat-transfer agent cooling the absorber. The output parameter of a bistable system is the absorber temperature, while the input parameter can be either the radiator temperature or the heat-transfer agent flow rate. Depending on the choice of the input parameter, the transfer characteristic of the system is either represented by a usual S-like curve or has an inverted shape.

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Correspondence to V. V. Ovcharov.

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Original Russian Text © V.I. Rudakov, V.V. Ovcharov, V.P. Prigara, 2008, published in Pis’ma v Zhurnal Tekhnicheskoĭ Fiziki, 2008, Vol. 34, No. 16, pp. 79–87.

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Rudakov, V.I., Ovcharov, V.V. & Prigara, V.P. Bistability in radiative heat exchange. Tech. Phys. Lett. 34, 718–721 (2008).

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