CAJ | 학술논문

针对现有蒸发冷却式换热器数值计算模型中存在的不足，提出了基于空间扫描思想的复杂蒸发冷却式换热器的通用模拟方法。该方法将三维复杂蒸发冷换热器按空间划分为若干个节点，每个节点视为独立的微型换热器，利用流体在节点之间的流动建立节点联系，根据稳定流动和稳态换热时节点之间的能量和质量守恒关系，构建迭代更新算法，利用扫描迭代的方法对模型进行求解。将无填料型和有填料两种闭式冷却塔的模拟结果与文献实验数据进行对比，结果表明：所建模型具有良好的精度，可用于复杂结构、复杂流动、多模态蒸发冷却式换热器的仿真。
침대현유증발냉각식환열기수치계산모형중존재적불족，제출료기우공간소묘사상적복잡증발냉각식환열기적통용모의방법。해방법장삼유복잡증발랭환열기안공간화분위약간개절점，매개절점시위독립적미형환열기，이용류체재절점지간적류동건립절점련계，근거은정류동화은태환열시절점지간적능량화질량수항관계，구건질대경신산법，이용소묘질대적방법대모형진행구해。장무전료형화유전료량충폐식냉각탑적모의결과여문헌실험수거진행대비，결과표명：소건모형구유량호적정도，가용우복잡결구、복잡류동、다모태증발냉각식환열기적방진。
In order to overcome the disadvantages of existing modeling methods of the complex evaporative cooling heat exchangers, a general modeling approach based on spatial scanning theory is proposed. In this approach,the 3-D heat exchanger is divided into calcula-tion nodes according to its spatial location. Each node is regarded as a micro heat exchanger,and connected with each other through air,water/solution, and/or refrigerant. An iterative algorithm is developed based on conservation of energy and mass of nodes in steady flow and steady-state heat transfer. Finally,the model is verified by comparing the simulated results and the experimental results of two closed-type wet cooling towers. Results show that the proposed model is highly accurate and reliable. This model can be used to simulate the per-formance of the evaporative cooling heat exchanger with complicated configurations and flow under different modes.