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Optimal design, operation and analytical criteria for determining optimal operating modes of a CCHP with fired HRSG, boiler, electric chiller and absorption chiller

机译:最佳设计,运行和分析标准,用于确定带有火力余热锅炉,锅炉,电制冷机和吸收式制冷机的CCHP的最佳运行模式

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摘要

The configuration, design and operation strategy are the main factors that can affect the technical, economic and environmental performances of combined cooling, heating and power (CCHP) system. In this paper, the operation of a CCHP system with fired heat recovery steam generator (HRSG), electric chiller, absorption chiller and a boiler is classified into one of three scenarios which are determined by gas turbine size and magnitude of thermal and electric loads, The optimal operating strategies are presented for these scenarios. For scenario with high cooling loads, we derive analytical expressions for calculation of ratio (electricity priceatural gas price) values which delimit three optimal modes for providing cooling demand in summer, thereby enabling selection of optimal operating strategy without numerical optimization. We examine the optimal design of CCHP system in three climate zones based on the proposed strategy. Supplementary firing as well as a higher coefficient of performance (COP) of the absorption chiller increase system efficiency and enable reduction of gas turbine size. Our case studies show that supplementary firing, (for some values of price ratio, absorption chiller COP and climate zone) the electric chiller and/or the boiler are necessary components to achieve optimal system performance. (C) 2017 Elsevier Ltd. All rights reserved.
机译:组态,设计和操作策略是可能影响制冷,供热和动力(CCHP)组合系统的技术,经济和环境性能的主要因素。在本文中,由火力回收蒸汽发生器(HRSG),电冷却器,吸收式冷却器和锅炉组成的CCHP系统的运行分为以下三种情况之一,这三种情况取决于燃气轮机的大小以及热负荷和电负荷的大小,针对这些情况提供了最佳的操作策略。对于高冷却负荷的情况,我们推导了用于计算比率(电价/天然气价格)值的解析表达式,该表达式确定了在夏季提供制冷需求的三种最佳模式,从而无需进行数值优化即可选择最佳运行策略。在此基础上,我们研究了三个气候带中CCHP系统的优化设计。补充燃烧以及吸收式制冷机的更高性能系数(COP)可以提高系统效率,并能够减小燃气轮机的尺寸。我们的案例研究表明,辅助燃烧(对于某些价格比,吸收式制冷机COP和气候区而言)是电制冷机和/或锅炉是实现最佳系统性能所必需的组件。 (C)2017 Elsevier Ltd.保留所有权利。

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