An approximate expression for part-load performance of a microturbine combined heat and power system heat recovery unit
An approximate expression for part-load performance of a microturbine combined heat and power system heat recovery unit
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DOI：
10.1016/j.energy.2012.12.037
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发表时间：
2013-03
期刊：
影响因子：
9
通讯作者：
W. Rachtan;L. Malinowski
中科院分区：
文献类型：
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作者：
W. Rachtan;L. Malinowski
给出了微型燃气轮机部分负荷运行时排出的废气供给热回收装置(HRU)的换热系数的近似表达式。如果采用适当的系数值，所提出的表达式可用于各种微型燃气轮机-热电机组。该表达式中的自变量仅限于：微燃机发电量、循环水质量流量和循环水进口温度。用非线性回归的方法确定了两种类型的微涡轮机和五种类型的热力机组的近似表达式的系数。推导出的表达式极大地方便了可用热功率的预测。因此，它可用于以微型涡轮机为基础的热电厂的数学建模以及此类系统的设计和运行。
An approximate expression for the heat transfer rate of a heat recovery unit (HRU) fed by the exhaust gas exiting a microturbine operating at part-load is developed. The proposed expression can be used for various microturbine-HRU sets if the appropriate values of coefficients are used. The independent variables in this expression are limited to: the microturbine electrical power output, the circulating water mass flow rate, and the circulating water inlet temperature. By the method of non-linear regression the coefficients of the approximate expression are determined for two types of microturbines and five types of HRUs. The developed expression greatly facilitates the prediction of available thermal power. Thus it can be useful in mathematical modeling of cogeneration plants based on microturbines as well as at the design and operation of such systems.