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Experimental study on a heat driven refrigeration system based on combined organic Rankine and vapour compression cycles

机译：基于组合有机朗克斯和蒸汽压缩循环的热驱动制冷系统的试验研究

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摘要

Waste heat recovery has been considered as an attractive technique to improve the overall energy utilization efficiency of internal combustion (IC) engines. In this paper, as distinct from most past research work, a thermally driven refrigeration system based on combined organic Rankine and vapour compression cycles is proposed to recover the IC engines? waste heat contained in the cooling water. Based on the proposed concept, a labscale prototype has been designed and constructed using off-the-shelf components to prove the feasibility of producing refrigeration for ships and refrigerated lorries. In this prototype, the power generated by the Organic Rankine cycle (ORC) is used to drive the compressor of a Vapour Compression Cycle (VCC) through a belt transmission mechanism. Pentafluoropropane (R245fa) and Tetrafluoroethane (R134a) are used as the working fluids for ORC and VCC systems, respectively. An electrical water heater is used to simulate the cooling jacket, while a cooling enclosure is used to simulate the cooling load. With the hot water at a temperature around 95 ?C, the system produces around 1.8 kW refrigeration effect at -4 ?C, leading to an overall heat-to-cooling efficiency of 0.18, which is defined as the ratio of the cooling capacity of the refrigerator to the heat input to the ORC power plant. The system performance could be significantly improved if optimal components could be utilized.
机译：废热回收已被认为是提高内燃机（IC）发动机的整体能量利用效率的有吸引力的技术。在本文中，与大多数过去的研究工作不同，提出了一种基于组合的有机朗肯和蒸汽压缩循环的热驱动的制冷系统来恢复IC发动机？冷却水中的废热。基于所提出的概念，采用现成部件设计和构建了Labscale原型，以证明生产船舶和冷藏卡车制造制冷的可行性。在该原型中，通过有机朗肯循环（ORC）产生的功率用于通过带传动机构驱动蒸汽压缩循环（VCC）的压缩机。五氟丙烷（R245FA）和四氟乙烷（R134A）分别用作兽人和VCC系统的工作流体。电热热水器用于模拟冷却套，而冷却外壳用于模拟冷却载荷。在温度下的热水左右95Ω·C，系统在-4℃下产生约1.8千瓦的制冷效果，导致总热量降温效率为0.18，定义为冷却能力的比率冰箱向兽人发电厂的热量输入。如果可以使用最佳组件，可以显着提高系统性能。

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