| 摘要: |
| 对蒸发式冷凝器顺流式和逆流式两种不同方式的换热性能进行实验研究。搭建了蒸发式冷凝器换热性能实验台，分别对顺流式和逆流式条件下，冷凝器喷淋密度和迎面风速对换热性能的影响进行理论和实验研究。结果表明：随着迎面风速的提高，喷淋密度增大，在顺流和逆流条件下，总换热系数均呈现上升的趋势，最后达到一个最大值，逆流式条件下的换热性能高于顺流式；在迎面风速为3.28 m/s，喷淋密度为0.057 kg/(m?s)条件下，顺流式的总传热系数最大为616 W/(m2?K)，逆流式总传热系数可达到628 W/(m2?K)。在相同条件下，逆流式的传质系数及能效比EER均优于顺流式。 |
| 关键词: 蒸发式冷凝器 顺流式 逆流式 性能 |
| DOI： |
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| 基金项目: |
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| Experimental Investigation on Heat Transfer Performance of Evaporative Condenser with Parallel and Counter Flow |
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Shen Jiang, Zhang Cong, Lu Kunlun, Liu Li
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| (Tianjin Key Laboratory of Refrigeration, Tianjin University of Commerce) |
| Abstract: |
| In this paper, an experimental investigation is conducted on the heat transfer performance of evaporative condenser with parallel flow and counter flow. An experimental platform which test heat transfer performance of evaporative condenser is built, which can present theoretical and experimental study on the influence of condenser’s spray density and face velocity under the condition of parallel flow and counter flow. The results showed that: the total heat transfer increases with the increase of face velocity and spray density under the condition of parallel flow and counter flow, and finally reaches a maximum value; the heat transfer performance under the condition of counter flow is better than that of parallel flow. When the face velocity and spray density are 3.28 m/s and 0.057 kg/(m?s)respectively, the maximum value of total heat transfer is 616 W/(m2?K) for parallel flow, and 628 W/(m2?K) for counter flow. At the same condition, the mass transfer coefficient and EER of counter flow is better than that of parallel flow. |
| Key words: evaporative condensers parallel flow counter flow performance |
