使用倒 L 型肋条作为粗糙度元件的太阳能空气加热器的能效分析

IF 0.8 Q4 THERMODYNAMICS

Archives of Thermodynamics Pub Date : 2023-12-04 DOI:10.24425/ather.2023.147546

Manmohan Chaudhari, Sohan Lal, Sharma, Ajoy Debbarma

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引用次数: 0

摘要

提高太阳能空气加热器(SAH)的高能化效率可以通过提高传热率来实现。本文对一种具有倒l型肋的人工粗化太阳能空气加热器进行了火用效率优化。在恒热流密度为1000w / m2时，对太阳能空气加热器的火用性能进行了数值分析。在雷诺数为3000 ~ 18000的条件下，研究不同相对粗糙度节距(7.14 ~ 17.86)对火用损失的影响。该几何形状的粗糙度参数已经过优化，并被发现在功能操作参数中，如平均太阳强度和集热器的温升。在隔离强度为1000 W/ m2时，相对粗糙度的优化值为17.86，温升参数为0.005 ~ 0.04。

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Exergetic performance analysis of solar air heater with inverted L-shape ribs as roughness element

Improvement in the exegetic eﬃciency of a solar air heater (SAH) can be done by enhancing the rate of heat transfer. In this work, the exergetic eﬃciency optimization of an artiﬁcially roughened solar air heater having an inverted L-shape rib has been performed. The numerical analysis of the exergetic performance of the solar air heater was carried out at a constant heat ﬂux of 1000 W/m 2 . The study was conducted to investigate the eﬀect of diﬀerent relative roughness pitch (7.14–17.86) on the exergy losses, under the Reynolds number range of 3000 to 18 000. The roughness parameter of this geometry has been optimized and found to be among functional operating parameters like average solar intensity and temperature rise across the collector. The optimized value of relative roughness pitch is 17.86 at the isolation of 1000 W/m 2 , and the parameter of temperature rise ranges from 0.005 to 0.04.

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来源期刊

Archives of Thermodynamics THERMODYNAMICS-

CiteScore

1.80

自引率

22.20%

发文量

期刊介绍： The aim of the Archives of Thermodynamics is to disseminate knowledge between scientists and engineers interested in thermodynamics and heat transfer and to provide a forum for original research conducted in Central and Eastern Europe, as well as all over the world. The journal encompass all aspect of the field, ranging from classical thermodynamics, through conduction heat transfer to thermodynamic aspects of multiphase flow. Both theoretical and applied contributions are welcome. Only original papers written in English are consider for publication.