CAJ | 학술논문

针对煤气化多联产系统中高温、高压合成煤气高温显热回收装置内气体辐射传热计算，由高温气体数据库HITEMP和HITRAN中获取煤气中各极性组分光谱辐射特性参数，使用一种新型宽带k分布模型计算出不同温度和压力下极性组分气体吸收系数，并进一步采用多项式拟合了吸收系数随温度变化函数，以便进行非等温和辐射平衡下的辐射传热计算。针对特定组分和压力下一维气体辐射传热的三个算例的计算结果表明，采用的宽带k分布模型计算的辐射热流分布误差约为逐线计算结果的15%，远低于全光谱 k分布模型，且计算时间仅为逐线计算的0.02%，是适用于该类问题工程计算的，综合考虑计算精度和计算消耗的最优模型。
침대매기화다련산계통중고온、고압합성매기고온현열회수장치내기체복사전열계산，유고온기체수거고HITEMP화HITRAN중획취매기중각겁성조분광보복사특성삼수，사용일충신형관대k분포모형계산출불동온도화압력하겁성조분기체흡수계수，병진일보채용다항식의합료흡수계수수온도변화함수，이편진행비등온화복사평형하적복사전열계산。침대특정조분화압력하일유기체복사전열적삼개산례적계산결과표명，채용적관대k분포모형계산적복사열류분포오차약위축선계산결과적15%，원저우전광보 k분포모형，차계산시간부위축선계산적0.02%，시괄용우해류문제공정계산적，종합고필계산정도화계산소모적최우모형。
This study focused on the calculation of gas radiation in a high-temperature heat recovery equipment for high temperature and high pressure syngas in coal polygeneration system. The spectral characteristic parameters of each component of the syngas were obtained from the high temperature gas database HITEMP and HITRAN.A new wide band k-distribution (WBK) model was used to calculate the coefficient of absorption under different temperature and pressure, and the results were interpolated to a polynomial function of temperature in order to calculate radiative heat transfer in the condition of non-isothermal and radiation equilibrium. Numerical results of three 1-D gas radiation heat transfer test examples indicate that the error of the radiative heat flux distribution obtained by the WBK model is about 15% based on the line-by-line results, which is much lower than the error of full spectral k-distribution. However, the time consumption of the WBK model is only 0.02% of the line-by-line model. Hence it is applicable for engineering calculation and is an optimal model considering both the accuracy and time consumption.