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太阳能热水器的绝热贮水箱的原理
来源:http://www.sdlntyn.com 发布时间:2016-3-8 15:49:47 浏览次数:790
太阳能热水器水箱是贮存热水的装置,其结构、容量、保温和材料将直接影响热水器的性能和运行的质量。
The solar water heater water tank is a device for storing hot water, the structure, the capacity, the heat insulation and the material will directly affect the performance of the water heater and the quality of the operation.
贮水箱主要组成部分为水箱内胆、保温层、水箱外壳、密封圈四部分。
The water storage tank is mainly composed of water tank, water tank, insulation shell, a sealing ring four part.
水箱的种类,按外形分有方形、扁盒型、圆柱型、球形水箱;按放置方法分有立式和卧式两种;按耐压状态分有常压的开式水箱和耐压的闭式水箱;按是否有辅助热源可分为普通水箱和具有辅助热源的水箱;按换热的方式不同可分为直接换热水箱和二次换热的间接热交换水箱。
Types of water tank, according to appearance is divided into a square, flat box type, cylindrical, spherical tank; according to the placement method is divided into the two kinds of vertical and horizontal; according to the pressure state of sub atmospheric open water tank and the pressure of the closed tank; according to whether have auxiliary heat source can be divided for ordinary water tank and water tank auxiliary heat source with; according to the difference of heat transfer can be divided into direct exchange hot water tank and the secondary heat exchanger of indirect heat exchange water tank.
水箱内胆生产材料的质量,对水箱的耐压、耐温、防渗漏及水质影响很大。目前市场上出售的产品,其水箱内胆主要由0.6mm厚304-2B不锈钢无磁性、抗锈蚀、焊接性好,塑性好。其它的常用材料有钢板进行防腐处理或搪瓷、镀锌钢板、防锈铝板、毒塑料或玻璃钢等。水箱的热特性包括放热特性、加热特性、保温特性。放热特性就是希望水箱内的热水都能放出来,方便利用。加热特性是大多数水箱内的水是上部热起来,然后下部出慢慢热起来。保温特性指水温下降的快慢,与水箱的封密性、保温材料、环境温度、水容量大小等相关。
The quality of the water tank production materials, and the water pressure, temperature resistance, anti leakage and great influence on water quality. Currently on the market to sell products, the water tank mainly by 0.6mm thick 304-2b stainless steel nonmagnetic, anti rust, welding good, good plasticity. Other commonly used materials are steel plate for anti-corrosion treatment or enamel, galvanized steel, rust proof aluminum plate, plastic or glass, etc.. The thermal characteristics of the water tank include heat release characteristics, heating characteristics, thermal insulation properties. Is that the heat transfer characteristics of the hot water of the water tank can be put out, easy to use. Is the most heating characteristics of the water in the water tank is lower than the upper heat up, then slowly heat up. The water temperature decreases the speed of thermal insulation, tightness, insulation materials, environmental temperature, water volume and water tank sealing etc..
目前太阳能热水器保温材料大多选用聚氨酯。聚氨酯整体发泡工艺复杂,加工难度高。成功发泡成型的保温泡沫整体性好,无漏发泡,泡沫密度达80千克/立米,强度均匀,封闷性好。如厚度在5cm~7cm左右,则保温性能极佳(东北严寒地区至少需6cm厚)。
The solar water heater insulation materials are used in polyurethane. Polyurethane foaming process is complex, the difficulty of processing. Successful foaming insulation foam overall good, leakage free foaming, foam density of 80 kg / cubic meter, uniform strength, sealing property good stuffy. Such as the thickness of 5cm ~ 7cm, excellent insulation property (northeast cold region at least 6cm thick).
水箱外壳常年暴露在外,必须选择抗腐蚀耐老化的材料制成。目前市场上常见的有304-BA不锈钢板、轧花铝板、国产及进口彩板、普通铝板、氧化铝板等。正规厂家大都采用进口彩板。许多厂利用氧化铝板及彩板,用低价位来形成市场卖点,因其抗腐蚀性差,寿命很难保证。
Tank shell perennial exposed, must choose the corrosion resistance to aging materials made. Currently on the market common have 304-BA stainless steel plate, embossed aluminum, domestic and imported color plate, common aluminium, oxidation aluminum etc.. The regular factory most imported color plate. The oxidation of aluminum and color plate by many factories, with low price to form the market, because of its corrosion resistance is poor, life is very difficult to guarantee.
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