Dynamic modelling of a ground-coupled solar ejector cooling system

IF 2 Q4 ENERGY & FUELS

International Journal of Sustainable Energy Pub Date : 2022-09-17 DOI:10.1080/14786451.2022.2121963

Youssef Mazloum, Akram S. Ghanem

引用次数: 1

Abstract

ABSTRACT This work presents a solar-driven air conditioning system based on ejector technology with closed-loop vertical geothermal boreholes. Modeling and simulation are carried out using Dymola software for dynamic transient analysis, with the refrigerant R134a. Condenser temperature regulation produces a 267% improvement of performance compared to a solar-only configuration. Solar fraction increases with increasing solar collector area, which benefits the system up to the limit of 27 m2 for a cooling load of 9 kW. The reservoir volume ensuring high solar fraction is 14 m3. Optimal generator saturation temperature ensures a seasonal coefficient of performance value of 0.772 and a maximum overall efficiency of 39%. When the system encounters deviations from the optimum set point, the overall efficiency becomes 37.4%.

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地面耦合太阳喷射器冷却系统的动力学建模

摘要:本文提出了一种基于喷射器技术的太阳能空调系统，该系统具有闭环垂直地热钻孔。采用Dymola软件进行动态瞬态分析建模与仿真，制冷剂为R134a。冷凝器温度调节产生267%的性能改进相比，一个太阳能配置。太阳能部分随着太阳能集热器面积的增加而增加，这有利于系统达到27平方米的限制，冷却负荷为9千瓦。确保高太阳分数的储层体积为14立方米。最佳发电机饱和温度可确保季节性性能系数为0.772，最高总效率为39%。当系统偏离最佳设定值时，总效率为37.4%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Sustainable Energy ENERGY & FUELS-

CiteScore

5.70

自引率

3.20%

发文量

期刊介绍： Engineering and sustainable development are intrinsically linked. All capital plant and every consumable product depends on an engineering input through design, manufacture and operation, if not for the product itself then for the equipment required to process and transport the raw materials and the final product. Many aspects of sustainable development depend directly on appropriate and timely actions by engineers. Engineering is an extended process of analysis, synthesis, evaluation and execution and, therefore, it is argued that engineers must be involved from the outset of any proposal to develop sustainable solutions. Engineering embraces many disciplines and truly sustainable solutions are usually inter-disciplinary in nature.