本文介绍了一种毛细管泵驱动的吸收式制冷循环。传统的吸收式制冷循环需要溶液泵将溶液从低压吸收器输送到高压发生器。相比之下，本研究中提出的循环涉及低压发生器和低压吸收器。低压发生器由一个带矩形槽的传热管和一个插入传热管的圆柱形毛细管芯组成，矩形槽为制冷剂蒸汽提供通道。灯芯的内部和冷却管构成吸收器。吸收器中的工作溶液穿透芯，之后制冷剂因传递到传热管的热负荷而蒸发。 这种蒸发在蒸发的制冷剂蒸汽和液-汽界面处的溶液之间产生压差，高压制冷剂蒸汽在冷凝器内冷却时冷凝成液相。在这种情况下，高压液体制冷剂通过膨胀阀膨胀并蒸发到蒸发器中，从而导致温度降低。蒸发到蒸发器中的低压制冷剂蒸汽被吸收到吸收器内的溶液中。在此循环中，只有发电机中产生的制冷剂蒸汽和冷凝器中的液体制冷剂保持高压。因此，无需使用溶液泵输送溶液。为了本研究的目的，制造了实验设备，以验证拟议循环的有效性。 实验装置由冷凝器、蒸发器、低压发生器和吸收器组成，其中发生器和吸收器通过多孔芯分离。此外，为了简化实验，采用单组分制冷剂作为工质进行了制冷实验。毛细泵送导致的压力下降在3.3至4.7 kPa之间，温度下降8.0至13.2 K。引文:内华达州拉斯维加斯ASHRAE会议论文

This paper presents an absorption refrigeration cycle which is driven by capillary pumping. Conventional absorption refrigeration cycles require solution pumps to transfer the solution from a low-pressure absorber to a high-pressure generator. In contrast, the cycle proposed in the present study involves a low-pressure generator and a low-pressure absorber. The lowpressure generator consists of a heat transfer tube with rectangular grooves, which provide a path for the refrigerant vapor, and a cylindrical capillary wick inserted into the heat transfer tube. The inside part of the wick and the cooling tubes constitute the absorber. The working solution in the absorber penetrates the wick, after which the refrigerant evaporates due to the heat load transmitted to the heat transfer tube. This evaporation creates a pressure difference between the evaporated refrigerant vapor and the solution at the liquid-vapor interface, and the high-pressure refrigerant vapor condenses into liquid phase as it cools inside the condenser. In this situation, the high-pressure liquid refrigerant expands via the expansion valve and evaporates into the evaporator, which results in a decrease in temperature. The low-pressure refrigerant vapor which evaporates into the evaporator is absorbed into the solution inside the absorber. In this cycle, only the refrigerant vapor generated in the generator and the liquid refrigerant in the condenser are kept at high pressure. Therefore, there is no need to use a solution pump to transport the solution.For the purposes of this study, experimental equipment was manufactured in order to verify the effectiveness of the proposed cycle. The experimental equipment consisted of a condenser, an evaporator, a low pressure generator and an absorber, where the generator and the absorber were separated by a porous wick. Furthermore, in order to simplify the experiment, the refrigeration test was performed by using a single-component refrigerant as the working fluid. The resulting decrease in pressure due to capillary pumping was between 3.3 and 4.7 kPa, and a decrease in temperature of 8.0 to 13.2 K was achieved.