Analysis on the performance parameters of marine ejector refrigeration rotary desiccant air-conditioning driven by waste heat

doi:10.16411/j.cnki.issn1006-7736.2020.04.012

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Journal of Dalian Maritime University ›› 2020, Vol. 46 ›› Issue (4) : 95-101. DOI: 10.16411/j.cnki.issn1006-7736.2020.04.012

ZHENG Chao-yu¹, ZHENG Qing-rong¹, CHEN Wu^*2

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Abstract

In order to study the energy saving characteristics of the ejector refrigeration rotary desiccant air-conditioning system driven by waste heat in ships, combining with the design parameters of a real marine air-conditioning system, the steam consumption, power consumption and COP of the system were calculated and analyzed under different entrainment ratio conditions, and compared with the traditional marine air-conditioning system. The results show that when the entrainment ratio is in the range of 0.1~0.9, the steam consumption decreases from 2851.1kg/h to 804.2kg/h, the power consumption decreases from 52.54kW to 35.83kW, and the COP increases from 6.34 to 9.29, which can achieve 59.33%~72.27% energy saving effect. However, most of the contribution to the reduction of steam consumption and power consumption is achieved when the entrainment ratio is low, and the contribution of entrainment ratio from 0.1 to 0.2~0.3 accounts for 56.25%~75%, while the contribution of entrainment ratio from 0.3 to 0.9 only accounts for 25%. It can be seen that the marine ejector refrigeration rotary desiccant air-conditioning has good energy saving potential, but when the entrainment ratio increases to 0.2~0.3, the effect of further increasing the entrainment ratio on energy saving and consumption reduction is not obvious. Therefore, in construction of the system, it should be considered comprehensively, and there is no need to use too high entrainment ratio. This study provides a reference for the application of ejector refrigeration rotary desiccant air-conditioning system in ships.

Key words

marine air-conditioning / ejector refrigeration / rotary desiccant / waste heat / energy saving / performance parameters

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ZHENG Chao-yu, ZHENG Qing-rong, CHEN Wu. Analysis on the performance parameters of marine ejector refrigeration rotary desiccant air-conditioning driven by waste heat[J]. Journal of Dalian Maritime University. 2020, 46(4): 95-101 https://doi.org/10.16411/j.cnki.issn1006-7736.2020.04.012

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