类比于导热和对流换热过程中(火积)的定义,在辐射换热中引入(火积)流和耗散的概念,由于辐射换热是不可逆过程,故在该过程中将部分被耗散.提出了辐射换热优化的(火积)耗散极值原理:对于具有一定约束条件的辐射换热过程,在给定温度边界条件的情况下,(火积)耗散最大时辐射换热过程最优(热流最大);在给定热流边界条件的情况下,耗散最小时辐射换热过程最优(温差最小).最后针对具体算例说明了该原理在辐射换热中的应用 Analogously to the definition of heat transfer and convection heat transfer (fire product), the concept of (fire product) flow and dissipation is introduced in radiation heat transfer. Since radiation heat transfer is an irreversible process, it is partially consumed in the process In this paper, the exergy principle of (heat accumulation) optimization for radiative heat transfer is proposed. For radiation heat transfer process with certain constraints, under the condition of given temperature boundary conditions, The heat process is the best (the heat flow is the largest); under the condition of the boundary condition of the heat flow, the radiation heat transfer process is the best (the minimum temperature difference) when the dissipation is minimum .Finally, the application of this principle to radiation heat transfer