Experimental Study on the Influence of External Heat Flux and Air Pressure on the Combustion Characteristics of Solar Panels

IF 2.3 3区工程技术 Q2 ENGINEERING, MULTIDISCIPLINARY

Fire Technology Pub Date : 2024-08-14 DOI:10.1007/s10694-024-01608-7

Hongmei Xu, Yuanzhou Li, Longhai Shu, Haiqin Yin

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Abstract

High altitude region has different characteristics from the normal pressure region due to its low air pressure and low oxygen content. The aim of this study is to investigate how solar panel’s ignition time, critical heat flux, combustion time, flame height, and mass loss vary as a function of external heat flux from 25 kW/m² to 45 kW/m² and air pressure from 60 to 100 kPa. It was found that external heat flux and air pressure negatively correlated with ignition and combustion time. Calculated from Delichatsios’s formula, the critical heat flux under different air pressures differs significantly from experimental data. Therefore, the parameters in Delichatsios’s formula are corrected based on experimental data. By relating critical heat flux, thermal response parameters, and air pressure, an overall formula for ignition time, radiation intensity, and air pressure can be derived. Mass loss rate and flame height are positively correlated with external heat flux and air pressure. Mass loss rate is expressed as a function of air pressure. Also, based on the relationship between mass loss rate and external heat flux and air pressure, a mathematical model between flame height, heat flux and air pressure is established.

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外部热通量和空气压力对太阳能电池板燃烧特性影响的实验研究

高海拔地区气压低、含氧量低，因此具有不同于常压地区的特性。本研究旨在探讨太阳能电池板的点火时间、临界热通量、燃烧时间、火焰高度和质量损失如何随 25 kW/m2 至 45 kW/m2 的外部热通量和 60 至 100 kPa 的空气压力而变化。研究发现，外部热通量和空气压力与点火和燃烧时间呈负相关。根据 Delichatsios 公式计算，不同气压下的临界热通量与实验数据相差很大。因此，要根据实验数据对 Delichatsios 公式中的参数进行修正。通过将临界热通量、热反应参数和气压联系起来，可以得出点火时间、辐射强度和气压的总公式。质量损失率和火焰高度与外部热通量和空气压力呈正相关。质量损失率是气压的函数。同时，根据质量损失率与外部热通量和空气压力之间的关系，建立了火焰高度、热通量和空气压力之间的数学模型。

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

Fire Technology 工程技术-材料科学：综合

CiteScore

6.60

自引率

14.70%

发文量

137

审稿时长

7.5 months

期刊介绍： Fire Technology publishes original contributions, both theoretical and empirical, that contribute to the solution of problems in fire safety science and engineering. It is the leading journal in the field, publishing applied research dealing with the full range of actual and potential fire hazards facing humans and the environment. It covers the entire domain of fire safety science and engineering problems relevant in industrial, operational, cultural, and environmental applications, including modeling, testing, detection, suppression, human behavior, wildfires, structures, and risk analysis. The aim of Fire Technology is to push forward the frontiers of knowledge and technology by encouraging interdisciplinary communication of significant technical developments in fire protection and subjects of scientific interest to the fire protection community at large. It is published in conjunction with the National Fire Protection Association (NFPA) and the Society of Fire Protection Engineers (SFPE). The mission of NFPA is to help save lives and reduce loss with information, knowledge, and passion. The mission of SFPE is advancing the science and practice of fire protection engineering internationally.