Abstract Integrating the vapor generator/separator of an absorption machine and the solar collector field is proposed as a means to reduce the cost and complexity of solar cooling and heating facilities. In order to further enhance the competitiveness of these facilities, some previous work on hybrid and combined absorption cycles is analyzed so that the proposed integration can be configured using these cycles. As a result, a single machine could in addition to pump heat can produce electricity and even consume it for fulfilling the cold and heat demand from the user when solar is not enough, this avoiding implementing a vapor mechanical compressor. The flow established inside the linear solar collector receiver tube is gravity driven and stratified under a counterflow regime. This configuration is numerically modeled in a steady-state 1D fashion, adapting established convective boiling correlations and including modifications for the mixture effects of the zeotropic dissolution NH3 LiNO3. used as working fluid for the absorption machine. The results indicate that the proposal is viable with collector lengths compatible with industrial applications. A low sensitivity to the boiling heat transfer correlation chosen has been found.

中文翻译：

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能量集成太阳能吸收机直接蒸汽产生的理论研究

摘要 将吸收机的蒸汽发生器/分离器与太阳能集热器集成在一起，作为降低太阳能冷却和加热设施的成本和复杂性的一种手段。为了进一步提高这些设施的竞争力，对混合和组合吸收循环的一些先前工作进行了分析，以便可以使用这些循环配置建议的集成。因此，当太阳能不足时，一台机器除了可以产生热量外，还可以产生电力，甚至消耗电力来满足用户的冷热需求，这避免了实施蒸汽机械压缩机。在线性太阳能收集器接收器管内建立的流动是重力驱动的，并在逆流状态下分层。这种配置以稳态一维方式进行数值模拟，调整已建立的对流沸腾相关性，并包括对共沸溶解 NH3 LiNO3 的混合效应的修改。用作吸收机的工作液。结果表明，该提案在集电长度与工业应用兼容的情况下是可行的。已发现对所选沸腾传热相关性的敏感性较低。