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Experimental investigations of a small-scale solar-assisted absorption cooling system

机译：小型太阳能辅助吸收冷却系统的实验研究

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摘要

The present study deals with a small-scale solar-assisted absorption cooling system having a cooling capacity of 3.52 kW and was investigated experimentally under the climatic conditions of Taxila, Pakistan. Initially, a mathematical model was developed for LiBr/H_2O vapor absorption system alongside flat-plate solar thermal collectors to achieve the required operating temperature range of 75°C. Following this, a parametric analysis of the whole system was performed, including various design and climate parameters, such as the working temperatures of the generator, evaporator, condenser, absorber, mass flow rate, and coefficient of performance (COP) of the system. An experimental setup was coupled with solar collectors and instruments to get hot water using solar energy and measurements of main parameters for real-time performance assessment. From the results obtained, it was revealed that the maximum average COP of the system achieved was 0.70, and the maximum outlet temperature from solar thermal collectors was 75°C. A sensitivity analysis was performed to validate the potential of the absorption machine in the seasonal cooling demand. An economic valuation was accomplished based on the current cost of conventional cooling systems. It was established that the solar cooling system is economical only when shared with domestic water heating.
机译：本研究涉及小型太阳能辅助吸收冷却系统，其冷却能力为3.52千瓦，并在巴基斯坦的TaxILA的气候条件下实验研究。最初，为沿着平板太阳能热收集器的Libl / H_2O蒸汽吸收系统开发了数学模型，以实现75°C的所需工作温度范围。在此之后，执行整个系统的参数分析，包括各种设计和气候参数，例如发电机，蒸发器，冷凝器，吸收器，质量流量和系统的性能系数（COP）的工作温度。实验设置与太阳能收集器和仪器连接，以使用太阳能和用于实时性能评估的主要参数的测量来获得热水。从获得的结果中，揭示了所达到的系统的最大平均COP为0.70，来自太​​阳能热收集器的最大出口温度为75°C。进行敏感性分析以验证吸收机器在季节性冷却需求中的电位。根据常规冷却系统的当期成本完成经济估值。建立太阳能冷却系统仅在与国内水加热共用时是经济的。

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