The solar replacement rate (SRR) refers to the area that must be collected by the solar water heating system relative to the area that must be collected by the solar water heating system when from the use of other energies (such as gas, coal, etc.) water heating systems, the ratio of the required area.
The method of calculating SRR is as follows:
SRR = area required by solar water heating system/area required by another water heating system water to energy
The smaller the SRR. , indicating that the energy efficiency of the solar water heating system is higher, that is, in the same area, the solar water heating system can collect more solar energy and better meet usage needs. Therefore, a lower SRR generally means that solar water heating systems are more cost-effective to use.