摘要
基于南海地区渔业冷库的实际需求,结合海洋温差能综合利用技术,提出一种利用太阳能辅热的吸收式双级引射增压OTEC动力-制冷混合循环。该混合循环以太阳集热器加热的表层温海水作为循环热源,同时以深层冷海水作为循环冷源,可兼顾渔业冷库制冷与发电。建立该动力-制冷混合循环模型,并对该循环进行热力学分析。结果表明:混合循环冷库温度可达到-30℃以下,混合循环有效效率为7.82%;与OTEC制冷动力复合循环相比,采用压缩制冷的混合循环制冷量可增加70.5%,制冷温度降低12℃;提高太阳集热器出口温度有助于提升混合循环热力性能,而过高的发生器压力则会降低混合循环热力性能。
An absorption double stage ejector boost OTEC power-refrigeration cycle is proposed in this paper to both improve the thermal efficiency of the ocean thermal energy conversion power cycle and meet the demand of the fishery cold storage in the South China Sea. The solar collector is utilized to increase the top layer temperature of the ocean,and the deep layer cold seawater is utilized as the cooling source. This hybrid cycle can be used for both fishery cold storage refrigeration and electricity generation purpose. The thermodynamic model of the hybrid refrigeration cycle is established,and the theoretical analysis of the cycle is carried out. The results show that the temperature of the cold storage of the mixed circulation system can reach below-30 ℃,and the effective efficiency is 7.82%;Compared with the OTEC refrigeration power combined cycle,the refrigeration capacity of the mixed refrigeration cycle can be increased by 70.5%,and the cooling temperature can be decreased by 12 ℃;By increasing the outlet temperature of the solar collector,the performance of the hybrid cycle can be improved,but too high generator pressure may reduce the performance of the hybrid cycle.
引文
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