Ismail Nazmi Che, Abdullah Mohd Zulkifly, Mustafa Khairil Faizi, Mazlan Nurul Musfirah, Gunnasegaran Prem, Irawan Agustinus Purna
School of Mechanical Engineering, Engineering Campus, Universiti Sains Malaysia, Nibong Tebal 14300, Malaysia.
School of Aerospace Engineering, Engineering Campus, Universiti Sains Malaysia, Nibong Tebal 14300, Malaysia.
Entropy (Basel). 2021 Dec 10;23(12):1663. doi: 10.3390/e23121663.
Porous media burner (PMB) is widely used in a variety of practical systems, including heat exchangers, gas propulsion, reactors, and radiant burner combustion. However, thorough evaluations of the performance of the PMB based on the usefulness of entropy generation, thermal and exergy efficiency aspects are still lacking. In this work, the concept of a double-layer micro PMB with a 23 mm cylindrical shape burner was experimentally demonstrated. The PMB was constructed based on the utilization of premixed butane-air combustion which consists of an alumina and porcelain foam. The tests were designed to cover lean to rich combustion with equivalence ratios ranging from ϕ = 0.6 to ϕ = 1.2. It was found that the maximum thermal and exergy efficiency was obtained at ϕ = 1.2 while the lowest thermal and exergy efficiency was found at ϕ = 0.8. Furthermore, the findings also indicated that the total entropy generation, energy loss, and exergy destroyed yield the lowest values at ϕ = 1.0 with 0.0048 W/K, 98.084 W, and 1.456 W, respectively. These values can be stated to be the suitable operating conditions of the PMB. The findings provided useful information on the design and operation in a double-layer PMB.
多孔介质燃烧器（PMB）广泛应用于各种实际系统中，包括热交换器、气体推进、反应器和辐射燃烧器燃烧。然而，基于熵产生、热效率和火用效率方面的有用性对PMB性能进行的全面评估仍然缺乏。在这项工作中，实验展示了一种23毫米圆柱形双层微型PMB的概念。该PMB基于预混丁烷 - 空气燃烧构建，由氧化铝和泡沫陶瓷组成。测试设计涵盖了当量比从ϕ = 0.6到ϕ = 1.2的贫燃到富燃情况。结果发现，在ϕ = 1.2时获得了最大热效率和火用效率，而在ϕ = 0.8时发现了最低热效率和火用效率。此外，研究结果还表明，总熵产生、能量损失和火用损失分别在ϕ = 1.0时达到最低值，分别为0.0048 W/K、98.084 W和1.456 W。这些值可以说是PMB的合适运行条件。这些发现为双层PMB的设计和运行提供了有用信息。
