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首页> 外文会议>ASME international mechanical engineering congress and exposition >ENERGY AND EXERGY ANALYSIS OF A BIOMASS POWER PLANT
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ENERGY AND EXERGY ANALYSIS OF A BIOMASS POWER PLANT

机译：生物质发电厂的能量和能量分析

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The fulfilment of energy targets regarding the use of renewable energy has been a strong incentive to the development of dedicated power plants using biomass. Because these facilities operate with low value residues, this orientation has also received a strong incentive by the quest to reduce the amount of fuel in the woods and lowering the risk of fire. This issue is a major problem in dry climates. Although the number of plants planned for Portugal was very large, the actual number of units in operation is small. The first plant to enter production in Portugal was the thermal power plant of Mortagua. In this paper the energy and exergy analysis in this plant is presented. The objective of this work is to develop an analysis for the energy conversion in the plant. This is based on parameters that were retrieved during its normal operation and include: biomass and air flow rate, temperature measurements of the flue gases throughout the facility including the economizer, the two superheaters and flue gas composition. The elemental analysis of the biomass resulting from a blend of various sources was measured in addition to its moisture (ranging between 20 and 45% depending on the sources). The analysis was carried out for a fuel batch with a moisture of 35%. The plant was operated at three loads (full load, 80% and 65% load) and from the energy/mass balances the overall efficiency was calculated to be approximately 26%. The data were also used to perform a second law analysis of the plant which enables the calculation of the exergy destruction in the various components of the facility, including the external irreversibility. It was observed that the combustion chamber is the prime contributor to the overall loss of efficiency. The exergy efficiency was found approximately 22%.
机译：关于使用可再生能源的能源目标的实现是利用生物质开发专用发电厂的强烈动力。由于这些设施以低价值残留运作，因此，这种方向也得到了强烈的激励，以减少树木中的燃料量并降低火灾风险。这个问题是干气候的一个主要问题。虽然计划为葡萄牙计划的植物数量非常大，但操作中的实际单位数量很小。在葡萄牙进入生产的第一个工厂是Mortagua的火电厂。本文提出了该厂房的能量和漏胀分析。这项工作的目的是开发植物能量转换的分析。这是基于在正常操作期间检测的参数，包括：生物质和空气流速，在整个设施中的烟道气的温度测量，包括助长器，两个过热剂和烟气组合物。除了水分（根据源代理）的水分（20至45％之间的水分，测量由各种来源的共混物产生的生物质的元素分析。对水分为35％的燃料批次进行分析。该植物在三个载荷（满载，80％和65％负载）下操作，并且从能量/质量平衡计算总效率约为约26％。该数据还用于执行该工厂的第二律分析，该植物可以计算设施的各种部件中的漏洞破坏，包括外部不可逆转性。观察到燃烧室是对整体效率损失的主要贡献者。高达效率约为22％。

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