摘要
以内可逆吸收式制冷循环模型为基础 ,建立一个不可逆吸收式制冷循环的模型 ,该模型的热传导规律为 q∝Δ(T- 1 ) ,包括低温热源到制冷空间的热漏及工质内部耗散、工质与外部热源间的有限热传导率的不可逆性 ,并用于导出制冷系数与制冷率的关系及在优化状态下的传热面积的分配关系。确定了在 q∝Δ(T- 1 )
On the basis of endoreversible absorption refrigeration cycle, a nonlinear heat transfer law for irreversible model of absorption refrigeration cycle, namely q ∝Δ( T -1 ), is deduced, taking account in the heat leakage from the heat sink to the cooled space and the irreversibilities due to both the dissipation of the working fluid as well as the finite\|rate heat transfer between the work fluid and the external heat reservoirs. It is then used to derive the relation between the coefficient of performance and the cooling load and the distribution of the heat transfer surface areas of the heat exchangers in the optimal states. The practical optimal regions of the nonlinear law cycle system are determined and range of the primary performance parameters are given.
出处
《热科学与技术》
CAS
CSCD
2002年第1期1-4,共4页
Journal of Thermal Science and Technology
关键词
q∝△(T^-1)
吸收式制冷循环
有限热传导率
线性唯像规律
热漏
不可逆性
absorption refrigeration cycle
finite rate heat transfer
nonlinear heat transfer law
heat leak
internal dissipation
optimal analysis
