Modelling of organic Rankine cycle system and heat exchanger components
Modelling of organic Rankine cycle system and heat exchanger components
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DOI：
10.1080/14786451.2013.770394
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发表时间：
2014-02
影响因子：
3.1
通讯作者：
H. C. Jung;S. Krumdieck
中科院分区：
文献类型：
--
作者：
H. C. Jung;S. Krumdieck
开发了标准有机朗肯循环(ORC)系统和组成该系统的换热器的数值模型，作为柔性设计的设计工具平台。其目标是设计一种高效、成本效益高的ORC发电厂，能够有效地利用低品位工业废热或中低温度地热流体。模拟了典型的换热器结构，包括圆形翅片管蒸发器、风冷冷凝器和平板预热器。为了验证系统模型的正确性，采用已发表的ORC结构和实验工艺条件进行了热力循环分析。描述了换热关联式和摩擦系数，用于换热器的模拟。ORC系统的仿真结果为换热器的设计提供了依据。通过迭代模拟确定了换热器的几何参数和性能。
Numerical models of a standard organic Rankine cycle (ORC) system and the heat exchangers comprising the system are developed as a design tool platform for a flexible design. The objective is design of an efficient, cost-effective ORC power plant that can effectively exploit low-grade industrial waste heat or low to medium-temperature geothermal fluid. Typical heat exchanger configurations were modelled, including the circular finned-tube evaporator, air-cooled condenser, and flat-plate preheater. A published ORC configuration and process conditions from experiments are used for the thermodynamic cycle analysis in order to validate of the system model. Heat transfer correlations and friction factors are described for the modelling of the heat exchangers. The simulation results of the ORC system provide the design requirements for the heat exchangers. Geometric specifications and performance of the heat exchangers are determined by iterative simulations.