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首页> 外文期刊>International Journal of Heat and Mass Transfer >Experimental study on sorption and heat transfer performance of NaBr-NH_3 for solid sorption heat pipe
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Experimental study on sorption and heat transfer performance of NaBr-NH_3 for solid sorption heat pipe

机译：固体吸附热管对NaBr-NH_3的吸附和传热性能的实验研究

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摘要

NaBr is considered as one of the typical low temperature salts employed for solid sorption refrigeration. The novel concept of solid sorption heat pipe (SSHP) which integrates heat and mass transfer with solid-gas sorption technology is expected to fulfill the continuous heat transfer and alleviate the drawbacks of both conventional heat pipe and thermosyphon. In this paper, an experimental system for both sorption/ desorption unit and heat transfer unit is designed and the experiments of non-equilibrium sorption/ desorption performances of NaBr-NH_3 and heat transfer performances of SSHP with different molar amounts and inclination angles are carried out, respectively. The test results of sorption/desorption unit demonstrate that the increase of desorption quantity becomes very slow when the heating temperature reaches up to 75 ℃ and above, and with the increase of condensing pressure, the mass of ammonia desorbed from the ammoniate NaBr becomes less. The investigations of SSHP with 3 mol sorbates show that the heat transfer quantity increases significantly with the heating temperature reaches to 55 ℃ and above, in which the relatively higher desorption rate can be obtained. The largest value of heat transfer quantity per unit molar ammonia for 3 mol sorbates is close to that of 5 mol under the condition of heating temperature of 90 ℃ and cooling temperature of 20 ℃. When the angle of inclination changes from 90° to 45°, the heat transfer capacity of SSHP declines more significantly compared with that of the angle from 45° to 0°.
机译：NaBr被认为是用于固体吸附制冷的典型低温盐之一。固态吸热管（SSHP）结合了传热和传质与固气吸附技术的新概念，有望实现连续传热并减轻传统热管和热虹吸管的弊端。本文设计了一个吸附/解吸单元和传热单元的实验系统，并进行了NaBr-NH_3的非平衡吸附/解吸性能和不同摩尔量和倾角的SSHP传热性能的实验。 ， 分别。吸附/脱附装置的测试结果表明，当加热温度达到75℃以上时，脱附量的增加非常缓慢，并且随着冷凝压力的增加，从氨化NaBr脱附的氨的质量变少。对3 mol吸附量的SSHP的研究表明，随着加热温度达到55℃以上，传热量显着增加，解吸率相对较高。在加热温度为90℃，冷却温度为20℃的条件下，每3摩尔山梨酸酯的单位摩尔氨气的传热量最大值接近5摩尔。当倾斜角度从90°变为45°时，SSHP的传热能力比从45°变为0°的传热能力明显下降。

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