New Working Fluid-Absorbent System for Absorption Refrigerating Machine and Absorption Heat Pump

对水-甲醇-溴化锂-氯化锌(9重量水/1重量甲醇，1重量溴化锂/1重量氯化锌)吸收式制冷机和吸收式热泵的性能进行了研究。测定了其物理性质(密度、粘度、溶解度、蒸汽压和汽液平衡)和热性质(比热和混合积分热)。测定了不同温度和不同浓度下的密度、粘度、蒸汽压、汽液平衡和比热。在270.35~389.55K的温度范围内获得了溶解度数据。在吸收剂浓度为0wt%~75.16wt%的范围内，获得了298.15K下的积分混合热。根据实验数据，分别关联了蒸汽压、比热和混合积分热的经验公式。从这些观察到的…在数据较多的情况下，绘制了热焓-浓度图。利用该热容-浓度图对单级双效吸收式制冷机、吸收式热泵和吸收式热交换器的特性进行了分析。比较了水-甲醇-溴化锂-氯化锌制冷、热泵和热交换器系统与各种工质-吸收系统的性能特点，并进行了实验室研究，以期找到对水-甲醇-溴化锂-氯化锌系统的腐蚀进行有效控制的缓蚀剂。使用有机缓蚀剂和无机缓蚀剂，在高压锅中进行了连续沸腾试验、间歇沸腾试验和腐蚀试验。这些腐蚀试验中使用的金属主要是SS41和铜。实验结果表明，最适合SS41和铜的缓蚀剂是甲苯基三氮唑、5-甲基苯并三唑、钼酸锂和硝酸锂。较少

This investigation was undertaken for obtaining performance characteristics of the water-methanol-lithium bromide-zinc chloride ( 9 weights water / 1 weight methanol , 1 weight lithium bromide / 1 weight zinc chloride ) absorption refrigerating machine and absorption heat pump. The physical properties ( density , viscosity , solubility , vapor pressure and vapor-liquid equilibrium ) and the thermal properties ( specific heat and integral heat of mixing ) were measured. The measurements of density , viscosity , vapor pressure , vapor-liquid equilibrium and specific heat were carried out at various temperatures and absorbent concentrations. Solubility data were obtained in the temperature range of 270.35K to 389.55K. Integral heat of mixing data at 298.15K were obtained in the absorbent concentration range of 0 wt% to 75.16 wt%. The empirical formulas for vapor pressure , specific heat and integral heat of mixing were correlated from experimental data , respectively. From these observed … More data , the enthalpy-concentration chart was constructed. The characteristics of the single stage and double effect absorption refrigerating machines , absorption heat pump and absorption heat transformer were examine by using this enthalpy-concentration chart. The performance characteristics of the water-methanol-lithium bromide-zinc chloride refrigeration , heat pump and heat transformer were compared with that of the various working fluid-absorbent system.On the other hand , a laboratory investigation was carried out in order to find corrosion inhibitors which would be effective in controlling the corrosion for the water- methanol-lithium bromide-zinc chloride system. The experiments were carried out on continuous boiling test , intermittent boiling test and corrosion test in the autoclaves with the use of organic inhibitors and inorganic inhibitors. The metals used in these corrosion tests were mainly SS41 and copper. From these experimental results , the most suitable corrosion inhibitors for SS41 and copper were recognized to be tolyltriazole , 5-methylbenzotriazole , lithium molybdate and lithium nitrate. Less