太阳能热水器溢流清洗装置

描述了一种太阳能热水器溢流清洗装置的结构，安装，使用方法，清洗效果和应用前景。试验表明，玻璃盖板经清洗后，热效率一般可改善１０％左右。     

太阳能热水器的发展前景

分析太阳能利用与洗澡的关系，结合我国太阳能热书器的形式，材料，价格，安装情况。提出国家扶植，优化设计，降低造价，普及推广的方式方法。     

太阳能热水器的前景

1 太阳能是21世纪的重要能源世界能源经历了柴草、煤炭、石油三个历史时期。1973年中东战争和1979年石油危机,促使了世界能源结构的变化,加快了新能源开发利用进程。21世纪太阳能将逐步代替常规能源,其成本与常规能源相当,甚至更为低廉。到21世纪末,预计太阳能将占世界能源总需要量的30%左右,同时将形成一个庞大的太阳能产业,其规模将超过目前的一些支柱产业。我国地处北半球欧亚大陆的东部,幅员辽阔,约有2/3以上的面积处于太阳能资源丰富区,我国各地太阳辐射总量为5.9×106[LCG.hqgro1]kJ/(m2·a)［140 kcal/(cm2·a)］。…     

家用太阳能热水器集热管内外清洗装置

当太阳能热水器的集热管外蒙尘污、内带水垢时,其集热效果会明显降低。文章设计了清洗集热玻璃管外部尘污和玻璃集热管内部水垢的装置。擦洗集热玻璃管外部时,只要在室内按动开关即可自动完成;清洗玻璃集热管内部水垢时,不必拆卸集热管,也不须使用化学清洗剂。     

太阳能热水器—冰箱复合机装置试验研究成果总结

在提出太阳能热水器－冰箱复合机联合循环的设想并制作了实验装置后,对复合机系统进行了多轮实验测试,得到了相同的令人满意的结果。系统在接受一定的能量输入后,对外界既提供热水又提供冰块,为太阳能供热与制冷的综合利用提供了第一手实验数据。本文将对复合机系统在不同工况下的性能实验研究结果进行总结。     

太阳能热水器的选择和鉴别

太阳能热水器的选择和鉴别黄鸣１类型（１）闷晒式由一个装有吸热水箱和玻璃盖板的保温盒和支架组成，是太阳能热水器的初级形式，结构简单，成本低廉（数百元／台），在华北地区每年可用半年左右，缺点是保温性能较差。（２）平板式由平板式集热器、蓄水箱、循环管和支架...     

家用太阳热水器与太阳热水系统的技术经济比较

分析了户用太阳热水器和太阳热水系统工程的经济技术特点,对两者成本构成、项目财务净现值、投入回收期和财务内部收益率等有关指标进行了经济技术比较.分析比较表明,太阳热水系统与家用热水器相比,节省安装占地,与建筑相结合得好,在降低成本,缩短投资回收期,提高经济效益方面有明显的优势.     

“看不见”的太阳能热水器

太阳能热水器已经走进千家万户,但其市场仍主要在农村和小城镇,城市市场的份额相对较小。其原因在于在城市高楼大厦上安装太阳能热水器被安装场地和城市建筑美观要求所局限。随着我国城市现代化、农村城镇化进程的加快,住宅建筑形式也向多样化发展,普通落水式太阳能热水器的安装局限性开始显现,甚至有的小区楼顶已经不允许安装,这对太阳能热水器与建筑的结合提出了更高要求。因而,太阳能与建筑一体化成为打破这一瓶颈的有效解决方案。     

改型太阳能热水器开发建筑产能能力

我国太阳能热水器的生产和工程应用,从上个世纪70年代末起步,经过20余年努力,已形成具有自主知识产权的技术和产品。国外专家评论,中国太阳能热水器市场是世界上唯一一个不靠政府补贴、完全依赖市场化运作、自发地发展起来的市场。然而,不容乐观的是,我国的太阳能热水器市场至今仍是以散户型、后置安装、小型局部系统为主要特征(图1),这种特征不利于太阳能热水器的扩大应用,突出体现在以下三个方面:     

太阳热水器技术讲座(三)家用太阳热水器

太阳热水器(或称太阳热水装置)根据用途可分为家用热水器和太阳热水系统(或称太阳热水工程)。严格来说，应按国标GB／18713—2002规定来区分，即水箱容水量在0．6t以下的太阳热水器称之为家用太阳热水器．而水箱容量大于0．6t的太阳热水器称之为太阳热水系统。     

太阳热水器技术讲座(五)太阳热水器的生产

1平板太阳集热器的生产平板太阳集热器是平板太阳热水器的关键部件,它的产品质量直接影响热水器的性能,其生产成本约占热水器总成本的1/2。根据吸热板的断面结构形状来看,平板集热器有管板式、翼管式、扁盒式、扁方式、塑料圆管式、铜铝复合式等(图1),还有蛇形管式和热管式。集热器吸热板的长宽尺寸应按照国家标准GB/T6424—1997的规定加以选择。吸热板的进水口和出水口的设置基本可分为4出口(外循环)和3出口(内循环)2类,如图2所示。(1)吸热板的生产吸热板的生产要根据吸热板的材料及其工质通道与板的结合方式确定加工工艺。例如:不锈钢扁…     

Refrigerant-charged integrated solar water heater

The performance of two R-11-charged integrated solar water heater collectors was investigated experimentally for forced and natural circulation water flows. The heat transfer from the refrigerant loop to the hot water storage tank took place through a condenser of novel design integrated within the collector frame. The effect of the condenser inclination on the system efficiency was remarkable for natural circulation water flow but had no significant effect for forced circulation flow. The difference in thermal response between the refrigerant and water loops caused buildup of stored energy in the condenser. This energy affected the buoyancy forces and generated flow pulsation that caused a harmonic-like variation of the system efficiency. This effect vanished with forced water circulation flow. The system efficiency varied between 20 and 50% depending on the solar insolation.     

Simulation studies of the position of the auxiliary heater in thermosyphon solar water heating systems

This paper investigates the effect of the physical location of the auxiliary source of energy in thermosyphon solar water heaters and shows that the performance of the system can be optimised with respect to the geometry of the system components. The investigation has been based on a domestic thermosyphon solar water heating system, which was simulated using the TRNSYS programme. The annual solar fraction of the system, at the weather and socioeconomic conditions of Cyprus, is, at best, approximately 77% with an in-tank auxiliary heater configuration and 86% with an external auxiliary heater. It is demonstrated that the arrangement with the external auxiliary unit has a higher collector efficiency and results in a higher annual solar fraction. In the case of in-tank auxiliary, the system performance increases with the height of the auxiliary position from the bottom of the storage tank; with the auxiliary at the bottom of the storage tank the annual solar fraction is approximately 59%, compared to 77% when the auxiliary is located at the top of the tank. The system performance also depends on the height of the collector return from the bottom of the tank.     

Optimal design for a thermosyphon solar water heater

Through the use of TRNSYS, a transient simulation program, optimization of design parameters for a thermosyphon solar water heater was studied for two regions in Jordan represented by two cities, namely Amman and Aqaba. The optimum value of a parameter is defined as the value which maximizes the annual solar fraction of a system. This paper includes a good deal of information concerning sizing of common components of thermosyphon solar water heaters operated under certain condition (load volume, distribution profile and temperature) using weather data of Jordan. The results indicate that the solar fraction of the system can be improved by 10–25% when a proper choice is used for each studied parameter. It is also shown that the solar fraction of a system installed in Aqaba (hot climate) is less sensitive to some parameters than the solar fraction of a similar installed in Amman (mild climate).     

太阳能热水器使用说明书的编写

一引言随着太阳能技术的研发与广泛应用,太阳能热水器已逐渐走进千家万户。据调查,有相当一部分用户不懂得如何正确操作使用太阳能热水器,更不懂得如何对热水器进行正确维护与保养。笔者认为造成这一尴尬的主要原因是太阳能热水器使用说明书编写存在缺陷,使用说明表达不清