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本文搭建了两级气泡泵与溴化锂制冷系统耦合特性实验台,进行了实验研究,实验中用气泡泵代替了传统的溶液泵,以进一步提高能源的利用率。实验结果表明:1)装置运行初期,因气泡泵本身的间歇性以及气泡泵流型转换的影响,系统参数,如一次冷剂蒸汽和稀溶液流量等参数,表现出不稳定性。随着装置继续运行,当气泡泵中的流型为环状流时,系统参数趋于稳定。2)在稀溶液浓度为53%时,1740 W的加热功率对系统性能系数(COP)影响最大,超过1740 W后,增加加热功率的影响不再显著。3)在无热交换器的情况下,加热功率为1740 W,稀溶液浓度为53%,管径为9.5mm,冷凝器温度为38~42℃,蒸发器温度为15~18℃时,系统的制冷系数为0.62~0.68。
In this paper, a two-stage bubble pump and lithium bromide refrigeration system coupling characteristics of the experimental set, the experimental study, the experiment bubble pump instead of the traditional solution pump to further improve the utilization of energy. The experimental results show that: 1) During the initial operation of the unit, due to the intermittence of the bubble pump itself and the bubble pump flow pattern conversion, the system parameters, such as the flow of primary refrigerant vapor and dilute solution, show instability. As the unit continues to operate, the system parameters tend to stabilize when the flow pattern in the bubble pump is a toroidal flow. 2) At a dilute solution concentration of 53%, the heating power of 1740 W has the greatest effect on the system performance coefficient (COP). When it exceeds 1740 W, the influence of heating power is no longer significant. 3) In the absence of a heat exchanger, the heating power is 1740 W, the dilute solution concentration is 53%, the diameter is 9.5 mm, the condenser temperature is 38 to 42 ° C, and the evaporator temperature is 15 to 18 ° C. The system The cooling coefficient of 0.62 ~ 0.68.