不可逆汽机热泵有限时间热力学优化  

General Performance Characteristics of an Irreversible Heat Pump System Driven by Steam Turbine Using Finite Time Thermodynamic Approach

作　　者：赵麒[1,2] 谭羽飞[1] 

机构地区：[1]哈尔滨工业大学市政环境工程学院,哈尔滨150090 [2]长春工程学院能源动力工程学院,长春130012

出　　处：《长春理工大学学报（自然科学版）》2012年第2期110-114,共5页Journal of Changchun University of Science and Technology(Natural Science Edition)

摘　　要：本文建立了汽机热泵系统的模型并基于有限时间热力学考虑汽机热泵系统内部不可逆和外部不可逆性对系统性能进行了分析研究。汽机热泵系统由不可逆汽机循环和不可逆压缩式热泵循环组成。分别对汽机侧和热泵的蒸发器与冷凝器进行了优化面积分配和优化时间分配研究,得到了系统热负荷与系统性能系数的数学关系。研究中引入两个不可逆参数RΔS、RΔS'。算例研究显示内不可逆参数对汽机热泵系统的性能比外部不可逆因素有更大的影响。研究还发现热泵侧不可逆因素对系统的影响大于汽机侧不可逆因素对系统的影响。In this paper, a model of heat pump driven by steam turbine is established and presents finite time thermo- dynamic analysis of the system considering both external as well as internal irreversibility.The system is considered as consisting of an irreversible heat engine and an irreversible heat pump.Optimization is made on both heat exchanger ar- eas distribution and heat engine cycle and refrigeration cycle time distribution.An optimal relation between performance coefficient of the system and heating load is obtained.Two irreversible parameters RAs, R^s, are introduced during the study.A detailed parametric study shows that internal irreversibility parameters have more drastic effect on performance reduction than any other extemal irreversibility parameter.It is also found that effects of the irreversible factors in the heat pump side is greater than the irreversible factors in the heat engine side on the system.

关 键 词：汽机热泵 有限时间热力学 不可逆 优化面积分配 优化时间分配 系统性能系数 

分 类 号：TU995[建筑科学—供热、供燃气、通风及空调工程]