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GREATLAB在Applied Thermal Engineering发表研究论文(2017年9月10日)

由邵亮亮、张子杨和张春路(通讯作者)撰写的论文Constrained optimal high pressure equation of CO2 transcritical cycle在Applied Thermal Engineering, 2018年第128卷在线发表。实际的跨临界二氧化碳制冷/热泵系统的高压受到可靠性及成本的制约,而目前所见的最优高压方程都是无约束的,在实际应用中可能导致系统性能的显著衰减。因此,本文提出了一种高压受限条件下的优化方法及最优高压方程,可供跨临界二氧化碳制冷或热泵循环的实际应用参考。

论文链接:http://www.sciencedirect.com/science/article/pii/S1359431116322451
免费下载链接:https://authors.elsevier.com/c/1VhqP4r6KuoFQJ (有效期至2017年10月29日)
论文摘要:
CO2 transcritical cycle has been widely applied in commercial refrigeration and heat pump water heating systems. Its cycle COP (coefficient of performance) heavily depends on the high pressure optimization and control. In theory, the optimal high pressure increases quickly with the increasing gas cooler outlet temperature or ambient temperature. However, due to reliability and cost concerns, there is an upper limit of the high pressure in compressor design and system operation. In this work, we proposed a constrained optimization method for getting constrained optimal high pressure equation of CO2 transcritical cycle. With the new method, the high pressure and its upper bound were simultaneously optimized at a given level of COP loss. Two specific approaches were developed to get the constrained optimal high pressure equation. Up to 1 MPa high pressure reduction was achieved with about maximum 5% and average 1% COP losses.

    
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