Simulation and optimization study on a solar space heating system for office building in Baotou

IF 1 4区工程技术 Q4 ENERGY & FUELS

Proceedings of the Institution of Civil Engineers-Energy Pub Date : 2022-03-17 DOI:10.1680/jener.21.00098

Qihui Yu, Jingyu Cao, Xin Tan

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Abstract

Dual-water tank energy storage has been adopted in some solar heating systems to mitigate solar energy randomness and instability. Two types of dual water tank solar heating system (DWTSH), one is traditional DWTSH system and the other system has thermal buffer which named TB-DWTSH, are introduced and analyzed in this paper. Analysis software called TRNSYS was used for the simulation, the tank water temperatures and solar guarantee of two systems were measured and compared. A new thermal comfort evaluation criterion for the solar heating system was briefly introduced. The TRNSYS model was verified by a pilot project of a traditional DWTSH system. The heating system were conducted based on the solar guarantee rate of the heating system and the thermal comfort index. Results showed that the simulation results are generally consistent with the experimental results. Secondly, compared with the traditional DWTSH system, the comfort index could be greatly improved in the TB-DWTSH system between 8 am and 9 am local time (LT). Furthermore, compared with the traditional DWTSH system, the energy consumption of the auxiliary heat source is reduced by 30%. This study provides a good foundation for future research on dual water tank solar heating systems.

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包头市办公楼太阳能空间采暖系统仿真与优化研究

为了缓解太阳能的随机性和不稳定性，一些太阳能供热系统采用了双水箱储能。本文介绍并分析了两种类型的双水箱太阳能供热系统，一种是传统的双水箱太阳能供热系统，另一种是带有热缓冲装置的双水箱太阳能供热系统，即TB-DWTSH。采用TRNSYS分析软件进行仿真，对两个系统的水箱水温和太阳能保障进行了测量和比较。简要介绍了一种新的太阳能供暖系统热舒适性评价标准。TRNSYS模型通过传统DWTSH系统的试点项目进行了验证。根据供暖系统的太阳能保证率和热舒适指数对供暖系统进行供暖。结果表明，仿真结果与实验结果基本一致。其次，与传统的DWTSH系统相比，TB-DWTSH系统在当地时间上午8点至9点之间的舒适性指数可以大大提高。此外，与传统的DWTSH系统相比，辅助热源的能耗降低了30%。本研究为今后双水箱太阳能供热系统的研究奠定了良好的基础。

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

Proceedings of the Institution of Civil Engineers-Energy ENERGY & FUELS-

CiteScore

3.00

自引率

18.20%

发文量

期刊介绍： Energy addresses the challenges of energy engineering in the 21st century. The journal publishes groundbreaking papers on energy provision by leading figures in industry and academia and provides a unique forum for discussion on everything from underground coal gasification to the practical implications of biofuels. The journal is a key resource for engineers and researchers working to meet the challenges of energy engineering. Topics addressed include: development of sustainable energy policy, energy efficiency in buildings, infrastructure and transport systems, renewable energy sources, operation and decommissioning of projects, and energy conservation.