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Design and thermo-economic comparisons of large scale solar absorption air conditioning cycles
Case Studies in Thermal Engineering ( IF 6.8 ) Pub Date : 2020-10-17 , DOI: 10.1016/j.csite.2020.100763
Adil Al-Falahi , Falah Alobaid , Bernd Epple

Sustainable cooling absorption technologies, using renewable energy sources, and climate-friendly cooling liquids gain more and more attention. In this work, design and thermo-economic analyses are presented to compare between two different collector types (parabolic trough and evacuated tube) by Water-Lithium Bromide absorption systems. Generally, the main component of the entire system is the absorption refrigeration chiller, the plant will then consist of three subsystems. The first subsystem is the solar system for thermal power conversion. The second subsystem is represented by the condenser and chiller absorber that need to be cooled, using a cooling tower. The third subsystem is represented by the cold circuit and the terminals of the useful cooling power produced. A case study for a sports arena with 700–800 kW total cooling load is also presented. Results reveal that parabolic trough collector combined with H2O–LiBr (PTC/H2O–LiBr) gives lower design aspects and minimum rates of hourly costs (5.2$/h), while ETC/H2O–LiBr configuration (5.6$/h). H2O–LiBr thermo-economic product cost is (0.14$/GJ). The cycle coefficient of performance COP was in the range of 0.5–0.9.



中文翻译:

大型太阳能吸收式空调循环的设计和热经济比较

使用可再生能源和气候友好型冷却液的可持续冷却吸收技术越来越受到关注。在这项工作中,提出了设计和热经济分析,以比较水-溴化锂吸收系统在两种不同收集器类型(抛物线槽和真空管)之间的比较。通常,整个系统的主要组件是吸收式制冷冷却器,然后该工厂将由三个子系统组成。第一个子系统是用于热能转换的太阳能系统。第二个子系统是冷凝器和冷却器吸收器,需要使用冷却塔进行冷却。第三子系统由冷回路和产生的有用冷却功率的端子表示。还介绍了一个具有700-800 kW总冷却负荷的运动场的案例研究。结果表明抛物槽收集器与H结合2 O–LiBr(PTC / H 2 O–LiBr)提供较低的设计方面和最低每小时成本(5.2 $ / h),而ETC / H 2 O–LiBr配置(5.6 $ / h)。H 2 O–LiBr热经济产品成本为(0.14 $ / GJ)。性能COP的循环系数在0.5-0.9的范围内。

更新日期:2020-10-30
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