Solar Collector Prepared by Zhang Lanying Gansu Natural

太阳集热器 Solar Collector Prepared by: Zhang Lanying Gansu Natural Energy Research Institute UNIDO International Solar Energy Center for Technology Promotion and Transfer Tel: +86 931 8386007 Fax: +86 8386011 Email: zhanglanying@unido-isec. org

目 录 / contents 1 Evacuated Tube Solar Collectors 2 Collector Array in an East West orientation 3 Application of Evacuated Tube Solar Collectors 4 Indoor space heating 5 Solar Energy Heating

Evacuated Tube Solar Collectors

tank Header pipe Collector tube Close-coupled vacuum tube solar hot water system E-W tube collector single side N-S tube collector An innovation of vacuum tube collector and hot water system with water-in-glass manifolds E-W tube collector double side

Evacuated Tube Solar Collectors • Glass evacuated tubes are aligned in parallel, the angle of mounting depends upon the latitude of your location. • In a North South orientation the tubes can passively track the sun all day.

• • Having the maximum amount of absorber area directly facing the sun causes superior solar collector performance. Because of their round design, evacuated tube collectors are able to passively track the sun from early morning until late afternoon, meaning that they are always pointed directly at the sun and can absorb solar thermal energy evenly all day long.

• Flat-plate collectors, on the other hand, only directly face the sun during midday which decreases their maximum daily heat output, lowers the heat available during morning and afternoon.

Evacuated Tube Solar Collectors • In an East West orientation they can track the sun all year round • The efficiency of a solar collector is dependent upon a number of factors, the main one being the level of solar radiation in your region

东西向排列的联集管式太阳集热器阵列 Solar Collector Array in an East West orientation 上述的加热过程，实质上是自然 对流换热。因此，从整个系统上 来说，无论是自然对流式的，还 是强制对流式的，关键是细心控 制冷水进口的流量。 The heating process is the natural convection heat transfer. Therefore, whether natural convection, or forced convection, the key point is to control the water flow carefully for the whole system.

东西向排列的联集管式太阳集热器阵列 Collector Array in an East West orientation • Principle of structure diagram It consists of five major components; the glass evacuated tubes, a diffuse reflection plate, the manifold, a tailstock, chassis and etc. The open ends of evacuated tubes are inserted into the manifold, the other end fixed on the chassis by a tailstock, one by one, and finally a one-piece solar collector array is constituted. 全玻璃 真空联集管式太阳集热器的原理结构 示意图。它由集热管、漫反射板、联 集管、尾座、尾架、底架六大部分组 成。集热管一端插入联集管，其另一 端通过尾座与尾架连接，最后固定在 底架上，构成一个整块的集热器。

东西向排列的联集管式太阳集热器阵列 Collector Array in an East West orientation

东西向排列的联集管式太阳集热器阵列 Collector Array in an East West orientation • • 联集管是联集管式太阳热水器的关键部件之 一 联集管采用不锈钢制作，成长方形箱式。 箱式联集管的两侧壁上对称开制圆孔，镶嵌O 型硅橡胶密封圈。 真空集热管从这个孔口插入，由O型圈与真空 集热管外管外壁相接触，构成密封。 the manifold is the key components of the solar collector array manifold made of stainless steel, formed a rectangle box. There are round hole of openings in both sides of the rectangle box symmetric, an O shape silicon rubber rings set in Glass vacuum tubes inserted to the orifices, the o-rings and outside wall of glass vacuum tube in tight contact formed a seal.

东西向排列的联集管式太阳集热器阵列 Collector Array in an East West orientation • • 为了保温，联集管与其外包层之间，采用聚氨酯整体发泡， 形成保温层，其厚度通常为 30 mm。 联集管两侧壁上的圆孔开口与其外包层的圆孔开口完全相 应对称。 外包层采用压花铝或不锈钢制作。在真空集热管插入后， 塞入黑胶挡风圈，防尘兼保温。 There is the polyurethane integral foaming between the manifold and outer cladding layers, it forming insulation layer with thickness of 30 mm usually. The round holes of openings in both sides of the manifold are completely corresponding symmetry with the outer layer hole opening. The outer wrapping layer is made of aluminum or stainless steel. After inserting the vacuum tube, the black rubber ring is stuffed in, so that to be dust proof and

东西向排列的联集管式太阳集热器阵列 Collector Array in an East West orientation • • • 全玻璃真空联集管式太阳集热器的规格 很多，可根据需要任意组合成采光面积 为 2 m 2一直到几千m 2容量不等的大小太 阳热水系统。 如挂在阳台上的分体式家用太阳热水器， 或几千m 2的大型太阳热水系统。 若配置合适的控制回路，可使热水系统 达以多功能全自动运行，十分方便。 There are different specification of glass vacuum tube, it can combines the solar water heating system ranging from the size of 2 m 2 to several thousand m 2 according to the needs. Such as separated type solar water heater hanging on the balcony, or the large solar water heating system with thousands m 2.

Application of Evacuated Tube Solar Collectors n Evacuated tube solar collectors are great for everything from making hot water, to solar heating, solar air conditioning, commercial water heating or manufacturing process heat.

Indoor space heating • Just as solar energy can provide hot water for a building, it can heat the air in the building, as well. • By using passive solar systems or active solar systems, solar energy can help heat or cool buildings.

Solar Energy Heating