提高太阳能集热器热性能的实验研究

在能量平衡方程的基础上,以《家用太阳热水器热性能试验方法》（GB／T12915—1991）为依据,对两种有渐开线反光板且吸热体形状不同的热管真空管和一种无反光板的热管真空管进行了对比实验。结果表明,渐开线反光板可大幅度提高热管真空管热水器的日平均效率,加反光板且吸热体为圆柱形的集热器能够达到更好的效果。     

管板式太阳能热水器的性能分析

本文详细介绍了管板式太阳能热水器的原理、结构和安装条件、着重分析了平衡状态的传热模式、性能参数影响因素，并对计算结果做了必要的讨论和分析     

陶瓷太阳能集热器

陶瓷太阳能集热器主要有陶瓷太阳能板、透明盖板、保温层和外壳等几部分组成。用陶瓷太阳能集热器组成的热水器即陶瓷太阳能热水器。     

新型管板式太阳能PV/T集热器光热特性研究与优化

为提高太阳能光伏/光热（PV/T）集热器全年运行效率,提出一种新型管板式太阳能PV/T集热器结构,并针对该集热器光热传递与光电转换过程进行分析,建立水和空气同时运行时的二维非稳态传热数学模型;在验证模型可靠性的基础上,模拟研究空气流道高度和空气流量等设计参数对PV/T集热器光热、光电特性的影响。结果表明,空气流道高度为15 mm时,PV/T集热器光电光热综合性能效率最佳;在所研究的工况下,该集热器的光电光热综合性能效率为0.84~0.87。     

太阳能集热器

太阳能集热器是指吸收太阳辐射并将产生的热能传递到传热介质的装置。这短短的定义却包含了丰富的含义：a）太阳能集热器是1种装置;b）太阳能集热器可以吸收太阳辐射;c）太阳能能集热器可以产生热能;d）太阳能集热器可以将热能传递到传热介质。     

曲面太阳能集热器与平板太阳能集热器的性能对比实验研究

目前传统的平板太阳能集热器存在占地面积大、集热性能差等缺点,在一定程度上制约了其在中国的推广及应用,而新型的曲面太阳能集热器的集热性能有大幅提升。通过实验平台测试了曲面太阳能集热器与平板太阳能集热器在2种安装角度时的集热性能,并分析了这2种太阳能集热器的集热性能差异。结果显示,在相同安装角度时,曲面太阳能集热器的集热效率高于平板太阳能集热器的。     

太阳能集热器

太阳能集热器的定义是：吸收太阳辐射并将产生的热能传递到传热介质的装置。这短短的定义却包含了丰富的含义：太阳能集热器是一种装置;太阳能集热器可以吸收太阳辐射;太阳能能集热器可以产生热能;太阳能集热器可以将热能传递到传热介质。     

太阳能集热器跟踪传感器

应太阳能集热器发展的需要提出一种新型跟踪随动系统传感器。该传感器结构新颖,构思巧妙,造价低廉,丰富了太阳能集热器跟踪随动系统传感器的类型。     

平板型太阳能集热器

平板型太阳能集热器主要有吸热板、透明盖板、隔热层和外壳等几部分组成。用平板型太阳能集热器组成的热水器即平板太阳能热水器。     

一种新型两用太阳能集热器

报导了一种新型两用太阳能集热器,它的换热效率高,既可用于加热空气,也可用于加热水,达到一套装置实现两种功能。     

Dual functioning flat plate thermal solar collector

The purpose of this paper is to investigate the cost effectiveness of a self-constructed and installed flat plate solar energy collector. The report analyzes the theoretical energy output of the solar collector, the experimental measured energy output and the theoretical insulation properties of the collector as constructed and installed.The results obtained indicate the collector is cost effective because of its insulation property when installed inside a single glazed window. The collector produces a relatively small energy income as a solar energy collector.     

A distributed model for a tedlar-foil flat plate solar collector

A theoretical simulation of flat plate collector performance, with temperature-dependency for material and coolant properties, is presented and the simulation is performed without asserting an a priori value for an overall heat loss coefficient of the collector. This approach differs from many previous works reported in the literature. For a given meteorological condition as well as key design parameters of collector as inputs, the model describes a 2-D absorber plate where its temperature distributions along with the coolant channels can be predicted. A comparison between the theoretical predictions and the experimentally measured data show good agreement to within 4%. The distributed modeling of a collector described in this paper is deemed to be a useful tool for the design of solar collectors.     

Performance of an inverted flat plate solar collector

In this note an analysis of an inverted flat plate solar collector has been presented. Effect of various parameters, namely thickness of the insulation, air conductance between flowing water and top of the bottom insulation, length of the collector and flow velocity of water on the performance of the collector have been studied. Numerical calculations have been made for typical cold day in Delhi, namely 26 January 1980.     

一种热管平板太阳能集热装置的性能研究

为解决平板大阳能集热装置在冬季的防冻问题,设计建造了热管平板集热装置,并进行了实验测试.在实验中测量了系统的初末状态水温、流量、环境温度、辐照强度等数据.通过对数据的分析拟合出了系统效率与初始水温、环境温度以及辐照强度之间的经验公式,并且以该经验公式为依据对系统全年12个月典型晴天气象条件下的系统效率进行了模拟.结合实...     

Analysis of a black liquid flat plate solar collector

In this paper we present a theoretical model of the black liquid flat plate solar energy collector. Numerical calculations have been performed corresponding to the experiments of Minardi and Chuang (1975). The present model has a good agreement with the experiments of Minardi and Chuang. A study of the effects of varying parameters, such as the liquid flow rate, radius and length of the tube has been made corresponding to the average solar intensity and ambient temperature data of 20 June 1974 in Ohio, U.S.A. The system's performance has also been studied for tropical climates.     

空气-水复合平板型太阳能集热器

提出了一种适用于太阳能供热采暖工程的新型太阳能空气-水复合平板集热器。该集热器可以单独使用空气、水或同时以空气和水作为集热工质。测试显示,该集热器空气循环集热效率为55%～65%,水循环集热效率为32%～34%,能够满足太阳能供热采暖工程的要求。该集热器成本不高,适用于在我国北方广大农村地区推广使用。     

Single basin solar still coupled with flat plate collector

This paper presents the transient performance of a single basin solar still coupled with a flat plate collector. The average daily production of distilled water has been found to be 24% higher than for a simple single basin solar still     

平板太阳集热器防冻结构试验研究

提出利用预留空间结构的防冻方案,并取得了初步研究成果。     

Optimum tilt angle for a flat plate solar collector

One of the important parameters that affects the performance of a flat plate solar collector is its angle of tilt with the horizontal. This is due to the fact that the variation of tilt angle changes the top loss coefficient and the amount of solar radiation reaching the absorber plate. A mathematical model has been developed for calculating the useful energy gained by a flat plate collector under various operating conditions. The model is then used to determine the optimum tilt angles for a typical collector in Basrah on a daily basis, as well as on the basis of a specified period. The optimum tilt angle is found by searching its value for which the useful energy gained by the collector is a maximum for a particular day or a specified period.From the results, it is observed that changing the tilt angle eight times in a year determines the useful energy in Basrah near its value which is found by changing the tilt angle daily to its optimum value. Furthermore, the influence of various operating parameters is studied on the daily optimum tilt angle.     

Photochemically assisted solar energy storage using eriochrome black-T in solar flat collector

The criteria for cis-trans photoisomerization of eriochrome black-T (EBT) in the flat-plate collector system, which consists of endoergic photochemical reaction, has been investigated. The efficiencies of this collector in both summer and winter have been compared with blank (distilled water only) and colored liquid (non-isomer-dye-absorbing in the same wavelength range). The photochemical storage efficiency was found to be higher in winter than in summer. The optimum efficiency for this photoisomerization-thermal reversion cycle was found by varying with the pumping rate of the liquid to match the value of rate constant of cis to trans reaction. The stability of (EBT) has been studied under different environmental conditions.