基于PCM蓄热装置的太阳辐照烘烤数值与实验分析

IF 0.3 Q4 MULTIDISCIPLINARY SCIENCES Momona Ethiopian Journal of Science Pub Date : 2019-05-30 DOI:10.4314/MEJS.V11I1.1
A. Tesfay, M. Kahsay, O. Nydal
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引用次数: 6

摘要

今天,许多发展中国家正在使用生物质作为其主要能源供应。然而,这种能量会影响环境、妇女和儿童的健康和安全。此外,使用传统炉灶利用这种能源正在造成室内空气污染,进而给数百万人带来健康问题。为了克服这些问题,全球研究人员正在努力,并提出替代安全能源。本文展示了一种适用于高温应用的集成PCM储热和传热回路系统的太阳能炊具。该系统旨在解决Injera烘焙应用程序。Injera是一种发酵扁平面包,是埃塞俄比亚最常见的食物类型,每天供应三到四次。厄立特里亚、索马里、苏丹和也门等其他国家也使用这种食物。该储存系统具有高达250摄氏度的储热能力,可以将这种热量保持大约两天。该储存器与一个安装在极地的集中器、固定接收器和用过的蒸汽传热流体相连。蒸汽在蒸发器和冷凝器之间以闭环自然循环。本文着重介绍了以Injera烘烤为目的的间接充热、同时充放电和蓄热放电。煎锅是一种定制的铝板,通过嵌入10毫米的不锈钢蒸汽盘管作为加热元件铸造而成。平底锅直径500毫米,厚度30毫米;翅片直径为20mm,长度为140mm。翅片浸入了一个20公斤重的PCM中,PCM与一个直径1.8米的抛物面碟形收集器相连。太阳能油炸锅展示了Injera对普通家庭规模的烘焙。烘焙是从储存的热量中测试的,而储存是充电的。一个充满电的储藏室为普通家庭提供了足够的热量。Injera需要大约19个Injera和额外的面包。关键词:太阳能Injera烘焙;PCM充电;PCM存储;太阳能Injera炉灶设计;太阳能烹饪;埃塞俄比亚。
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Numerical and experimental Analysis of Solar Injera Baking with a PCM Heat Storage
Today, many developing countries are using biomass as their primary energy supply. However, this energy affects the environment, health and safety of women and children. In addition, utilization of this energy using traditional cooking stoves is causing indoor air pollution and in turn health problems to millions of people. To overcome such problems, efforts are being made by researchers globally and are suggesting alternative safe energy sources. This paper demonstrates solar cooker with an integrated PCM thermal storage and heat transportation loop system suitable for high temperature applications. The system has designed to address Injera baking application. Injera, a fermented flat bread type, is the most common food type served three to four times a day in Ethiopia. Other countries like Eritrea, Somalia, Sudan and Yemen also use this food. The storage system has storing capacity of heat up to 250 0 C and it can retain this heat for about two days. The storage has coupled to a polar mounted concentrator, fixed receiver and used steam heat transfer fluid. The steam circulates naturally between the evaporator and condenser in a closed loop. The paper focuses on indirect charging, simultaneous charging-discharging and discharging of the stored heat for the purpose of Injera baking. The frying pan is a custom-made aluminum plate casted by embedding a 10mm coiled stainless steel steam pipe as heating element. The pan is 500mm in diameter and 30mm thick; and the fins are 20mm in diameter and 140mm long. The fins have immersed into a 20kg PCM, which is coupled to a 1.8m diameter parabolic dish collector. The solar fryer demonstrates Injera baking for average family size. Baking is tested from the stored heat, while storage is charging. A fully charged storage has supplied enough heat to baked average household Injera demands about 19Injeras and additional breads with the remaining heat. Keywords:  Solar Injera baking; PCM charging; PCM storage; Solar Injera stove design; Solar cooking; Ethiopia.
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来源期刊
Momona Ethiopian Journal of Science
Momona Ethiopian Journal of Science MULTIDISCIPLINARY SCIENCES-
自引率
0.00%
发文量
13
审稿时长
12 weeks
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