Solar water heaters are divided into: pressure solar water heaters and waterfall solar water heaters. As for the lifespan, it is linked to the quality of the solar water heater itself. Solar water heaters are of two types: stainless steel. steel coating and enamel coating. They are generally used for 15 years. At present, in order to reduce costs, some small manufacturers use inferior stainless steel materials and pass them off as good ones. distinguish them. Problems will arise after about 2-5 years of use, so when purchasing, be sure to choose a brand with a warranty.
The guaranteed rate is the designer's idea
The heat supplied by the solar part of the system is divided by the total system load.
For example, I want to use solar energy to provide half the heat. My guarantee rate is then 50%, and all conceptsFuture operations will be centered around this 50%.
Taking into account the performance of the products and environmental issues, the guarantee rate will be adjusted.
I designed the solar guarantee rate to be 70%. After the calculation, I found that it could not be achieved or the actual effect was not ideal, so I need to adjust it next time. try 60% and slowly adjust, adjust, adjust. It became an experience.
I hope this helps you.