Development of Prototype High-Temperature Chemical Heat Pump Using Ca(OH)_2/CaO Reaction

从提出的利用Ca(OH)_2/CaO反应的化学热泵实际运行的角度出发，对原型高温化学热泵进行了开发研究。根据下面描述的调查，获得了以下结果。1)考察了化学热泵机组实际使用的最佳工况（无换热）。结果显示了几种模式下的工作特性。2)利用热重分析仪考察了样品粒度、组分、煅烧条件等因素对CaO再碳化反应活性的影响。结果表明，焙烧温度对反应活性有一定的影响。3)对该化工热泵系统进行了理论分析。结果表明，实验结果与数学模型吻合较好。4)考察了冷凝性能对储热特性的影响。结果表明，通过提高冷凝器的效率，缩短了反应完成时间。5)考察了含加热器和热媒流的换热器、传热传质促进剂、冷凝促进剂对原型热泵性能的影响。因此，缩合促进剂的作用并不充分。但是，影响性能的其他参数就足够了。6)采用H_2O供气热重分析仪，考察了样品粒度、组分、煅烧条件等因素对水化/脱水反应活性的影响。结果发现，所考察的参数对水合/脱水和再碳化反应活性的影响是相似的。7)对原型热泵进行了一些基本性能和实用性能的测试。结果发现，热泵的基本性能足够实际使用。然而，对于高温度使用，热交换介质限制了性能。少

From the viewpoint of operating the proposed chemical heat pump using Ca(OH)_2/CaO reaction for practical use, the developmental research of prototype high-temperature chemical heat pump was performed. Based on the investigations described below, the following results were obtained.1) The best operating condition for practical use of the chemical heat pump unit (no heatexchange) was examined. As a result, the operating characteristics in several modes were shown.2) By the use of a thermogravimetric analyzer, the effects of sample size, component, calcination conditions etc., on the recarbonation reaction activity of CaO were examined. As a result, it was found that the calcination temperature influenced the reaction activity.3) The theoretical analysis of this chemical heat pump system was performed. As a result, there was a good agreement between experimental results and mathematical model.4) The effects of condensation performance on heat-storage characteristics were examined. As a r … More esult, by improving the efficiency of the condenser, the reaction completion time was shortened.5) The effects of the heat exchanger including a heater and a heat medium flow, the heat and mass transfer promoter, the condensation promoter on prototype heat pump performance were examined. As a result, the influence of the condensation promoter was not sufficient. However, the other parameters effecting the performance were enough.6) By using of the thermogravimetric analyzer With H_2O gas supplier, the effects of sample size, component, calcination conditions etc., on the hydration/dehydration reaction activity were examined. As a result, it was found that the the effects of the examined parameters were similar for both hydration/dehydration and recarbonation reaction activities.7) On the prototype heat pump, some kinds of both basic and utility performances were examined. It was found that the basic performance of the heat pump was enough for practical use. However, for high level temperature use, the heat exchange medium limits the performance. Less