Designing the Main Heat-Transfer Equipment of an ORC-System for the Internal Combustion Engines of Shipboard Installations

I. S. Antanenkova; A. P. Koroleva; M. S. Frantsuzov; A. A. Sukhikh; V. V. Sytchev

摘要

Abstract— The application of an electricity-generation technology involving the use, in a so-called organic Rankine cycle (ORC), of low-boiling working fluids holds promise for many fields of science and engineering in Russia. Many industrial and technological processes and operation of mechanisms and devices are often accompanied by releasing a large amount of low-grade (rejection) heat. As a rule, this heat is not usefully utilized and dissipates in the environment. Recovering the heat of exhaust gases from gas-turbine engines and diesel-generators in motor-road, railway, marine, and river transport; in gas transportation systems; in military engineering; etc. is one of the most promising application fields of this technology. In particular, an analysis of the technological parameters characterizing the operation of modern shipboard installations makes it possible to judge about the applicability of the ORC technology for improving their energy efficiency. However, the need to develop compact heat exchangers, which are designed through numerically analyzing the boiling and condensation of low-boiling working fluids (that are in themselves complex thermodynamic phenomena), is one of the most serious factors impeding the application of ORC installations in transport vehicles. The article presents a calculation procedure for preliminary designing the heat exchangers for ORC installations represented by a refrigerant vapor generator and a refrigerant condenser. The proposed procedure, which is based on the method of successive approximations, makes it possible to take into account the variability in the thermophysical properties of the used working fluids, the specific features of heat-transfer processes, changes in the geometrical parameters of the devices, the influence of process enhancement methods, etc. The article also gives results from testing the proposed procedure for the vapor generator and condenser of an ORC installation operating with R245fa fluoroorganic working fluid. The main geometrical and thermal characteristics necessary for designing the equipment of an ORC installation that recovers the heat of exhaust gases from Type 6M32 internal combustion engines used in a shipboard installation are obtained.

机译：摘要 - 在低沸腾的工作流体中，在所谓的有机朗肯循环（ORC）中，应用涉及使用的电力发电技术在俄罗斯的许多科学和工程领域拥有承诺。许多工业和技术过程和机构和装置的操作通常伴随着释放大量低级（排斥）的热量。通常，该热量未有利于于环境中消散。从机动车道，铁路，海洋和河流运输中从燃气轮机发动机和柴油发电机中恢复废气的热量;在燃气运输系统中;在军事工程;等是该技术最有前途的应用领域之一。特别是，对现代船舶装置操作的技术参数的分析可以判断ORC技术的适用性，以提高其能效。然而，需要开发紧凑型热交换器，该热交换器通过数值分析低沸点工作流体的沸腾和冷凝（本身复杂的热力现象）是阻碍兽人安装中的最严重的因素之一运输车辆。该物品提出了一种计算过程，用于初步设计由制冷剂蒸汽发生器和制冷剂冷凝器表示的兽人装置的热交换器。基于连续近似的方法的所提出的程序使得可以考虑使用的工作流体的热物理特性的可变性，传热过程的特定特征，器件的几何参数的变化，工艺增强方法等的影响。该物品还通过测试使用R245FA氟于氟烃的工作流体操作的蒸气发生器和冷凝器的所提出的蒸汽发生器和冷凝器的结果。获得了设计恢复船舶安装中使用的6M32内燃机的排气热量的兽人安装设备所需的主要几何和热特性。

Designing the Main Heat-Transfer Equipment of an ORC-System for the Internal Combustion Engines of Shipboard Installations

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