分析工业锅炉自然循环的水动力计算特点，对简单及复杂循环回路的计算方法提出建议。
Analysis the character of hydrodynamic calculation for natural circulation of industrial boiler and give the recommendation of calculation method for simple and complex circulation circuit.
本文对复合循环热水锅炉水动力计算方法进行了理论推导，并给出了计算实例。
This paper deals with a theoretical study of the hydrodynamic computatation method for use bined circulation hot-water boiler with specific calculation, examples being given.
动力学模型需要大量的田间实测资料，主要应用于农田氮素循环、定量评价水氮资源利用率、优化水肥管理措施等方面。
The DPM method needs lot of field data, mainly to study nitrogen cycle in field, assess water and nitrogen usage efficiency and optimize management soil water and nitrogen fertilizer.
本文是在试验研究的基础上介绍了双层炉排锅炉的水冷炉排弯曲原因及其避免方法、水冷炉排循环回路的水动力特性及其设计时应注意的问题；
The paper discovers the causes for the bending of water cooled grate of a double grate furnace based on the experimental results and solutions to this problem are also given.
高温取热炉传热计算和水动力计算结果表明热负荷较低时，水循环容易发生停滞。水循环回路结构复杂容易导致并联管内的流量分配不均匀性较大。
The heat transfer and hydrodynamic calculation results of the waste heat boiler show that water circulation is stagnant when the thermal load is very low.
高温取热炉传热计算和水动力计算结果表明热负荷较低时，水循环容易发生停滞。水循环回路结构复杂容易导致并联管内的流量分配不均匀性较大。
The heat transfer and hydrodynamic calculation results of the waste heat boiler show that water circulation is stagnant when the thermal load is very low.
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