How to choose solar water heater?
Should also pay attention to the vacuum pipe between the pipe spacing, the general two tube center distance is about 70mm.4 home solar water heater bracket design should be reasonable, should have enough strength and stiffness (added: there are corrosion resistance, do not use two years of support down) to ensure adequate bearing capacity. In some areas of daily wind, especially in coastal areas, in the purchase of domestic solar water heaters should also pay attention to the product in the design of wind resistance.5 currently on the market, a variety of reflector forms of household solar water heater is diverse, there are flat reflectors, reflective surface plate, embossed aluminum and so on, in the purchase should pay attention to the heat absorbing surface reflective plate design products can make full use of the vacuum tube, the vacuum tube to the maximum extent by light. (supplement: now most of them do not have a reflective board, and businesses to save costs, user products improve the wind resistance, not worth mentioning)
In the thermal performance index, the higher the average daily efficiency is, the better the average heat loss coefficient is.2 home solar water heater is the key component of all glass evacuated solar collector tube (referred to as vacuum tube), the quality of vacuum tube directly affects the performance of the entire household solar water heater. Purchase should be carefully observed in the vacuum tube glass coating on the tube, the coating layer is called solar selective absorbing coating, because the factory production process, color coating will be different, but generally are black, dark blue or dark gray, good quality coating color uniformity film, no scratches, no peeling or shedding the phenomenon, no glass or stone section of tumor, supports the glass pipe in the correct place, not loose.
How to choose domestic solar water heaterAt present, the domestic solar water heater market sales of a wide range of solar collector, in accordance with the type to distinguish, can be divided into the vacuum tube and the plate; in accordance with the structure of distinction can be divided into integral and split; in accordance with the production process division, can be divided into pressure and non pressure. At present, most of the domestic solar water heaters sold in the market are mostly non pressure vacuum tube type solar water heater. When we buy domestic solar water heater, we should pay attention to the following points:
