HEAT SINK RADIATOR-HEAT ACCUMULATOR OF SPACE OBJECT PASSIVE SYSTEM Russian patent published in 2020 - IPC B64G1/50 H05K7/20 F28D15/04 

FIELD: heating.

SUBSTANCE: invention relates to heat accumulating devices using latent heat of phase transitions of working substance to provide required heat mode of energy sources during their cyclic operation. Disclosed is a radiator-heat accumulator of a passive thermal control system of a space object (SO), which operates in a periodic mode, and comprising a heat-removing base, a heat accumulator with a housing and an inner volume V with a heat accumulating substance and cooling channels. Housing of heat accumulator is made in form of radiation panel with thickness δ much smaller than characteristic size of its surface of heat radiation area F, and heat accumulating substance is uniformly distributed in continuous matrix phase with volume fraction ε_mp, contacting inner surface of housing and heat accumulating substance with density ρand mass M, with melting point T_m, and evenly distributed over the volume V coolant condensation zone with a volume fraction ε_chp controlled heat pipe and the melting point T_m^warm coolant, where on the heat-removing base of the SO there are electric heaters and a zone of evaporation of the controlled heat pipe, which maintain the temperature of SO T_so in the range of T_so^min...T_so^max. SO periodically operates in active mode with duration of τ_g with constantly allocated thermal power W_so and in standby mode with duration of τ₀, wherein the required mass of heat-accumulating substance is evaluated from: M = W_so⋅τ_g/(c⋅ΔT⋅k₁ + r⋅k₂), where k₁ = 1 + ε⋅σ⋅F⋅(T_x⁴ + 2⋅T_x³ ⋅ΔT + 2⋅T_x²⋅ΔT ² + T_x⋅ΔT³ + 0.2⋅ΔT⁴)/W_so, k₂ = 1 + ε⋅σ⋅F⋅T_pl⁴/W_so; r is specific heat of fusion of heat accumulating substance; ε – degree of radiation panel heat radiation surface blackness; σ is Stefan-Boltzmann constant; c is specific heat capacity of heat accumulating substance; ΔT = T_m – T_x, provided that T_x > T_m^warm, where T_x – temperature heat accumulating substance in the solid initial state, wherein internal volume of heat accumulator V corresponds to relationship: V = M/[ρ⋅(1 – ε_chp – ε_mp)], and the minimal necessary heat radiation surface of the radiation panel satisfies F_min = M⋅r/(τ₀⋅ε⋅σ⋅T_m⁴).

EFFECT: technical result is providing a compact design, high reliability and broader functional capabilities of the thermal control system.

10 cl, 4 dwg