可再生多发电系统的努力经济性分析

Vontas Alfenny Nahan, Audrius Bagdanavicius, A. McMullan
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摘要

在这项研究中,开发和分析了一种新的多发电系统,该系统产生电力(电力)、热能(加热和冷却)和满足农业需要的灰烬。该系统由生物质综合气化联合循环(BIGCC)和吸收式制冷机系统组成。该系统产生约3.4兆瓦的电力,4.9兆瓦的热量,88千瓦的冷却和90公斤/小时的灰。采用循环速度和EES对多代系统进行了建模。对该系统进行了能源、火用和火用经济分析,并计算了火用费用。燃烧经济研究表明,气化炉、燃烧器和热回收蒸汽发生器是总成本最高的主要部件。还计算了相对成本差(r)和消耗经济因子(f)等消耗经济变量。蒸发器、燃烧室和冷凝器的耗火经济系数分别为1.3%、0.7%和0.9%,认为很低,表明资金成本率远低于火用破坏成本率。这意味着这些组成部分的改进可以通过增加资本投入来实现。燃气轮机和蒸汽轮机产生的电力的能源成本分别为0.1050英镑/千瓦时和0.1627英镑/千瓦时。灰分成本为0.0031英镑/公斤。在一些亚洲国家,如印度尼西亚,灰烬可以用作农业肥料。在BIGCC系统中,气化炉和冷凝器的热耗成本分别为0.0619英镑/千瓦时和0.3972英镑/千瓦时。在交流系统中,冷凝器和吸收器的热量的火用成本分别约为0.2956英镑/千瓦时和0.5636英镑/千瓦时。交流制冷系统的火用成本为0.4706英镑/千瓦时。本研究表明,努力经济分析是评估产品成本的有力工具。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Exergoeconomic analysis of renewable multi-generation system
In this study a new multi-generation system which generates power (electricity), thermal energy (heating and cooling) and ash for agricultural needs has been developed and analysed. The system consists of a Biomass Integrated Gasification Combined Cycle (BIGCC) and an absorption chiller system. The system generates about 3.4 MW electricity, 4.9 MW of heat, 88 kW of cooling and 90 kg/h of ash. The multi-generation system has been modelled using Cycle Tempo and EES. Energy, exergy and exergoeconomic analysis of this system had been conducted and exergy costs have been calculated. The exergoeconomic study shows that gasifier, combustor, and Heat Recovery Steam Generator are the main components where the total cost rates are the highest. Exergoeconomic variables such as relative cost difference (r) and exergoeconomic factor (f) have also been calculated. Exergoeconomic factor of evaporator, combustor and condenser are 1.3%, 0.7% and 0.9%, respectively, which is considered very low, indicates that the capital cost rates are much lower than the exergy destruction cost rates. It implies that the improvement of these components could be achieved by increasing the capital investment. The exergy cost of electricity produced in the gas turbine and steam turbine is 0.1050 £/kWh and 0.1627 £/kWh, respectively. The cost of ash is 0.0031 £/kg. In some Asian countries, such as Indonesia, ash could be used as fertilizer for agriculture. Heat exergy cost is 0.0619 £/kWh for gasifier and 0.3972 £/kWh for condenser in the BIGCC system. In the AC system, the exergy cost of the heat in the condenser and absorber is about 0.2956 £/kWh and 0.5636 £/kWh, respectively. The exergy cost of cooling in the AC system is 0.4706 £/kWh. This study shows that exergoeconomic analysis is powerful tool for assessing the costs of products.
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