Performance Evaluation of Solar Air Collector by Chimney Effect for Drying Applications

IF 1.3 Q2 AGRICULTURE, MULTIDISCIPLINARY

Acta Technologica Agriculturae Pub Date : 2021-12-01 DOI:10.2478/ata-2021-0027

G. Gebremicheal, J. Buzás, I. Farkas

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引用次数: 3

Abstract

Abstract Solar air collector is one of the main components of a solar dryer unit, which supplies the conditioned air for processing the perishable edible items. Various techniques have been employed to improve the thermal efficiency of the collector system, such as extended surfaces, packed beds, artificial roughness, etc., however, the cost of construction is higher. Therefore, this study was focussed on the collector efficiency enhancement using a chimney without applying the aforementioned. A single-pass solar air collector coupled with drying chamber and chimney was utilized for the experiments. The experiments were conducted in September. The average values of the solar radiation intensity, ambient temperature, temperatures inside the dryer, collector efficiency were graphically presented. The experimental data reported the maximum values of the outlet temperatures for the solar air collector with and without a chimney to be 52.8 °C and 57 °C, respectively. The collector thermal efficiency with and without the chimney was found to vary from 29.6% to 64.8% and from 26.9% to 44.8%, respectively. Furthermore, it was noticed that, with the chimney, the temperature inside the dryer showed uniform tendency.

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基于烟囱效应的太阳能集风器干燥性能评价

摘要太阳能空气收集器是太阳能烘干机的主要部件之一，它为处理易腐烂的可食用物品提供调节空气。已经采用了各种技术来提高收集器系统的热效率，例如扩展表面、填充床、人工粗糙度等，然而，建造成本更高。因此，本研究的重点是在不应用上述技术的情况下使用烟囱提高收集器效率。实验采用了与干燥室和烟囱相结合的单程太阳能空气收集器。实验于9月进行。用图形表示了太阳辐射强度、环境温度、干燥器内部温度和收集器效率的平均值。实验数据显示，带烟囱和不带烟囱的太阳能空气收集器的出口温度最大值分别为52.8°C和57°C。发现有烟囱和没有烟囱的收集器热效率分别在29.6%至64.8%和26.9%至44.8%之间变化。此外，还注意到，有了烟囱，干燥机内部的温度呈现出均匀的趋势。

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

Acta Technologica Agriculturae AGRICULTURE, MULTIDISCIPLINARY-

CiteScore

2.50

自引率

28.60%

发文量

审稿时长

18 weeks

期刊介绍： Acta Technologica Agriculturae is an international scientific double-blind peer reviewed journal focused on agricultural engineering. The journal is multidisciplinary and publishes original research and review papers in engineering, agricultural and biological sciences, and materials science. Aims and Scope Areas of interest include but are not limited to: agricultural and biosystems engineering; machines and mechanization of agricultural production; information and electrical technologies; agro-product and food processing engineering; physical, chemical and biological changes in the soil caused by tillage and field traffic, soil working machinery and terramechanics; renewable energy sources and bioenergy; rural buildings; related issues from applied physics and chemistry, ecology, economy and energy.