Abstract

Parabolic trough collectors (PTC) are solar thermal energy collectors designed to capture the sun’s direct radiation over aperture area and concentrate it onto a focal point. Parabolic shaped mirrors are used to focus the solar radiation on the pipe that carries water to heat it. The concentrated heat from the parabolic collector heats up the water and helps in producing hot water which can be used domestically. Drying is one of the important and energy consuming processes. Especially foragricultural product processing open yard drying is widely adapted, without proper hygienic condition. The presently designed cost effective two in one PTC setupcanheat water and air simultaneously. In the box shaped structure the hot water isgenerated at the top of the box. The unused absorbed heat on the collector is used to heat the air which is passed via bottom chambers. As a result, hot water (60°C) and hot air (45°C) can be obtained which is used mainly for heating purpose. Manual tracking type of design is chosen for cost effectiveness and simplicity in structure. This Combined water and air heating design improves the total efficiency of the system up to 4.3% when compared with the conventional PTC design. In addition, the emission reduction of 1 kg of CO₂/day can be achieved and simple payback period is 2 years when compared to electric heaters which can be easily affordable by common man.

中文翻译：

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二合一抛物槽收集器在家用热水和热空气生产中的性能分析

摘要

抛物线槽式集热器（PTC）是太阳能热能收集器，旨在捕获太阳在孔径区域上的直接辐射并将其集中到焦点上。抛物线形镜子用于将太阳辐射聚焦在输送水以加热水的管道上。来自抛物线收集器的集中热量加热了水，并有助于产生可用于家庭的热水。干燥是重要且耗能的过程之一。特别是在没有适当卫生条件的情况下，农作物产品的露天堆场干燥适应广泛。当前设计的经济高效的二合一PTC装置可以同时加热水和空气。在箱形结构中，热水在箱顶部产生。集热器上未使用的吸收热量用于加热通过底部腔室的空气。结果，可获得主要用于加热目的的热水（60℃）和热空气（45℃）。选择手动跟踪类型的设计是为了节省成本并简化结构。与传统的PTC设计相比，这种结合了水和空气的加热设计将系统的总效率提高了4.3％。此外，减少了1公斤的二氧化碳排放量与普通人可以轻松负担的电加热器相比，每天可以达到_2个/天，简单的投资回收期为2年。