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A numerical analysis and optimization of the dynamic performance of a multipurpose solar thermal system for residential applications

机译：用于住宅应用的多功能太阳能热系统动态性能的数值分析与优化

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This article presents results of a multipurpose solar thermal system that provides hot service water, space heating, and space cooling for residential use during all seasons in Pretoria, South Africa. A pressurized system utilizing evacuated tube solar collectors with internal heat pipes was considered for hot water production. Space cooling is achieved using a micro single-effect LiBr-H2O absorption chiller. The focus of the study was on the prediction of seasonal hourly performance trends and determination for optimum performance parameters. The solution was obtained by assembling the system's mathematical model, for which the solution was obtained numerically using Engineering Equation Solver (EES). A solar field consisting of 15 (1.959 m(2)), 20 (2.615 m(2)), and 25 (3.266 m(2)) evacuated tube collectors connected in parallel with three, four, and five arrays was considered. The developed model was validated using data available in literature and found to be valid within +/- 3% of the available data. Results showed that the 20-tube collector with a five-array configuration gave the most favorable and optimal system performance.
机译：本文介绍了多用途太阳能热系统的结果，可提供热水服务水，空间加热和空间冷却，以便在南非比勒陀利亚的所有季节期间使用住宿使用。利用具有内部热管的抽空管太阳能收集器的加压系统被认为是热水生产。使用微型单效LibR-H2O吸收冷却器实现空间冷却。该研究的重点是预测季节性每小时性能趋势和最佳性能参数的决定。通过组装系统的数学模型来获得解决方案，其中使用工程方程求解器（EE）在数字上以数字方式获得解决方案。由15（1.959米（2）），20（2.615米（2））和25（3.266米（2））的太阳能电场进行了分布在三个，四个，四个阵列并行连接的抽空管收集器。使用文献中可用的数据验证开发的模型，并发现在可用数据的+/- 3％内有效。结果表明，具有五阵列配置的20管收集器具有最有利和最佳的系统性能。

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