The paper describes a computational study and an experimental investigation of aqueous potassium carbonate droplets in superheated steam flow for potential applications in mitigation of superheated geothermal steam. The computational model included the boiling point elevation due to the droplet salt concentration as well as other concentration-dependent physical properties of the salt solution. Various phenomena involved in the process, such as breakup, transport, heat transfer, boiling and coupling between droplet and steam phase were taken into account. To validate the simulation results from the model, a laboratory scale experimental setup was built and experiments were carried out for different salt solution injection concentrations upto 5.27 mol kg⁻¹ in superheated steam at 421 K. Results from the simulation were in accordance with experimental measurements, showing an increase in boiling point elevation with an increase in injection salt solution concentration. The temperature values obtained from the simulation are slightly higher than those measured with an average deviation of 1.5 K, which can be explained by a small degree of heat loss from the apparatus not accounted for in the model. Results from the simulation for concentration were also in accordance with the experimental measurement, showing an increase in concentration of the salt solution droplets, collected at the separator bottom. The concentration values obtained from the simulation are lower than that from the measurement with an average deviation of 20%.

本文描述了过热蒸汽流中碳酸钾水溶液液滴的计算研究和实验研究，可用于缓解过热地热蒸汽的潜在应用。该计算模型包括由于液滴盐浓度引起的沸点升高以及盐溶液的其他与浓度有关的物理特性。考虑到该过程中涉及的各种现象，例如破裂，传输，传热，沸腾以及液滴与蒸汽相之间的耦合。为了验证模型的仿真结果，建立了实验室规模的实验装置，并针对浓度高达5.27 mol kg ^-1的不同盐溶液注入量进行了实验在421 K的过热蒸汽中加热。模拟的结果与实验结果一致，表明沸点升高与注入盐溶液浓度的增加有关。从模拟获得的温度值略高于以1.5 K的平均偏差测得的温度值，这可以用模型中未考虑的设备产生的少量热量损失来解释。浓度的模拟结果也与实验测量结果一致，表明在分离器底部收集的盐溶液液滴的浓度有所增加。从模拟获得的浓度值低于从测量获得的浓度值，平均偏差为20％。