首页> 外文期刊>Solar Energy >Numerical modelling of high temperature latent heat thermal storage for solar application combining with double-effect H2O/LiBr absorption refrigeration system
【24h】

Numerical modelling of high temperature latent heat thermal storage for solar application combining with double-effect H2O/LiBr absorption refrigeration system

机译:结合双效H2O / LiBr吸收制冷系统的太阳能高温潜热蓄热数值模型

获取原文
获取原文并翻译 | 示例
获取外文期刊封面目录资料

摘要

Latent Heat Thermal Storage (LHTS) systems can be applied to minimize the discrepancy between energy supply and demand in solar applications. Combining this system with a double-effect H2O/LiBr absorption system could reduce the investment costs for cooling purposes. These systems require generation temperatures higher than 150 degrees C. Phase Change Materials (PCMs) in the desired temperature range have previously not been thoroughly studied and the integration of an LHTS system into this absorption system has not previously been reported. In this paper a numerical investigation was carried out for a shell-and-tube LHTS system, combined with a solar driven (H2OLiBr)-Li-/ double-effect absorption system. The numerical model of the LHTS system was coupled with a mathematical model of the absorption system, and the estimation of the cooling demand and the solar energy. The phase change process was numerically solved using the enthalpy method. Hydroquinone was identified as a suitable PCM. Results indicated that for this configuration of the LHTS system, natural convection cannot be neglected in the modelling of the solidification process. With a LHTS system of 12.55 m(3), it was possible to fulfil the considered 100 kW peak cooling demand for the 2400 m(2) office building without external energy input. The presented work provides guidelines for the thermal performance and design optimization of a hydroquinone based LHTS system for a solar driven H2O/LiBr double-effect absorption system. (C) 2014 Elsevier Ltd. All rights reserved.
机译:可以应用潜热蓄热(LHTS)系统,以最大程度地减少太阳能应用中能源供需之间的差异。将该系统与双效H2O / LiBr吸收系统结合使用可以减少用于冷却目的的投资成本。这些系统需要高于150摄氏度的产生温度。所需温度范围内的相变材料(PCM)之前尚未进行过彻底的研究,并且以前尚未报道过将LHTS系统集成到此吸收系统中。在本文中,对壳管式LHTS系统与太阳能驱动(H2OLiBr)-Li- /双效吸收系统结合进行了数值研究。 LHTS系统的数值模型与吸收系统的数学模型相结合,并估算了冷却需求和太阳能。使用焓法数值求解了相变过程。对苯二酚被确定为合适的PCM。结果表明,对于LHTS系统的这种配置,自然对流在凝固过程的建模中不能忽略。使用12.55 m(3)的LHTS系统,无需外部能量输入即可满足2400 m(2)办公楼的100 kW峰值制冷需求。提出的工作为太阳能驱动的H2O / LiBr双效吸收系统中基于对苯二酚的LHTS系统的热性能和设计优化提供了指南。 (C)2014 Elsevier Ltd.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号