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首页> 外文期刊>日本建築学会環境系論文集 >流れ場の計算負荷を低減したCFD解析による土壌熱交換システムの年間性能予測: 土壌熱交換システムの冷却・加熱効果の予測手法に関する研究(その2)
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流れ場の計算負荷を低減したCFD解析による土壌熱交換システムの年間性能予測: 土壌熱交換システムの冷却・加熱効果の予測手法に関する研究(その2)

机译:流场计算负荷减小的CFD分析对土壤热交换系统的年度性能预测:土壤热交换系统冷热效应的预测方法研究(第二部分)

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摘要

本報では流れ場の計算負荷を低減した土壤熱交換システムの年間性能予測手法の提案を目的として提案手法や事前解析の概要を示した上で、年間性能予測に関するケーススタディを実施し、以下の知見が得られた。%The pre-cooling and pre-heating effect of outdoor air on an EAHE (Earth-to-Air Heat Exchanger) should be simulated over long periods of time by three-dimensional unsteady CFD (Computational Fluid Dynamics) analysis. However, because of the limitations of the calculation load of flow fields, annual calculation of unsteady CFD analysis is difficult with general computers. In this paper, we propose an annual prediction method for the pre-cooling and pre-heating performance of an EAHE by unsteady CFD analysis, which does not analyze flow fields to reduce calculation loads. Moreover, we carried out case studies using the conventional method and proposed method with two types of outside air flow rate, and verified the validity of this proposed method comparing the conventional method. The following results were obtained :1)It was suggested that using an EAHE which outside air flow rate were 10,350 m~3/h and 2,070 m~3/h, annual sensible heat loads of outdoor air-conditioning units were reduced by 20.6 % and 38.8 %, respectively. 2) In all cases by the proposed method, the relative errors of an annual integrated pre-cooling and pre-heatdng quantity based on the results for the conventional method were under 3 %. 3) Comparing the conventional method with the proposed method, computing times for the annual prediction were reduced by about 0.5 %.
机译:本报告概述了该方法的概述和初步分析,目的是提出一种在流场上减少计算负荷的土壤热交换系统的年度性能预测方法,然后对年度性能预测进行了案例研究。获得知识。 %应该通过三维非稳态CFD(计算流体力学)分析在长时间内模拟室外空气对EAHE(地对空热交换器)的预冷和预热效果。这种流场计算负荷的局限性,很难用通用计算机进行每年的非稳态CFD分析计算。本文提出了一种基于非稳态CFD分析的EAHE预冷和预热性能的年度预测方法,不对流场进行分析以减少计算量。此外,我们使用常规方法和提出的方法对两种外部空气流速进行了案例研究,并与常规方法进行了比较,验证了该方法的有效性。以下结果得到:1)建议使用外部空气流量分别为10,350 m〜3 / h和2,070 m〜3 / h的EAHE,减少室外空调装置的年显热负荷。分别减少了20.6%和38.8%; 2)在所有情况下,根据传统方法得出的结果,年度综合预冷量和预热量的相对误差均低于3%3)。与传统方法相比,本方法可将年度预测的计算时间减少约0.5%。

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