Cao guifa energy storage

What is Cao/Ca(OH) 2 thermochemical heat storage (THS)?

CaO/Ca (OH) 2 thermochemical heat storage (THS) technology is considered to be one of the most promising technologies for large-scale solar energy storage. However, the THS performance of raw CaO-based materials decreases during multiple cycles.

What are the advantages of CaCO 3 / CAO system?

1. The CaCO 3 /CaO system can initiate heat storage above 650 °C, but the reaction is incomplete and heat storing process is slow. The efficient heat storage is achieved for temperatures above 750 °C for pure CaCO 3, but after doping SiO 2, the system presented a much better reaction rate at 700 °C and above. 2.

Is Caco 3/cao heat storage system affected by doping?

Based on the above-mentioned observations, it can be concluded that SiO 2 is the cause of decline in decarbonation temperature of CaCO 3/CaO heat storage system; this makes it able to store energy efficiently at lower temperatures as compared to pure materials. The heat supply process is not affected by doping.

Why is Cao/CaCO 3 inefficient?

However, due to its very low optical absorption, thermochemical energy storage materials made of pure CaO/CaCO 3 struggle to reach reaction temperatures when only absorbing solar energy directly in a calciner, making the overall system inefficient.

What is CaCO 3 / CAO system doped with SIO 2?

CaCO 3 /CaO system doped with SiO 2 works efficiently for temperatures from 700 to 800 °C. CaCO 3 is a promising material for thermochemical energy storage (TCES) systems. It can store and release heat upon reversible decarbonation to CaO, which emits heat through carbonation.

What is CaCO 3 / CaO?

SiO 2 addition in CaCO 3 stabilizes the cyclic stability and lowers the decarbonation temperature. CaCO 3 /CaO system works efficiently for temperatures from 750 to 925 °C. CaCO 3 /CaO system doped with SiO 2 works efficiently for temperatures from 700 to 800 °C. CaCO 3 is a promising material for thermochemical energy storage (TCES) systems.