Fenghua Hi-Tech (000636) released its semi-annual report on the evening of August 20. The company's revenue for the first half of the year was 2.081 billion yuan, up 41.38% year-on-year; net profit was 414 million yuan, up 270.40% year-on-year. The basic earnings per share was 0.46 yuan. During the reporting period, the tight supply and demand [...]
Chemical energy storage: using hydrogen or synthetic natural gas as a secondary energy carrier, using excess electricity to produce hydrogen, you can directly use hydrogen as a carrier of energy, or you can react it with carbon dioxide to synthesize natural gas (methane), hydrogen or synthetic. In addition to being used for power generation, natural gas [...]
Electrochemical energy storage includes lead-acid batteries, lithium-ion batteries, sodium-sulfur batteries, and flow batteries. (1) Lead-acid battery: It is a battery whose electrode is mainly made of lead and its oxide, and the electrolyte is a sulfuric acid solution. It is widely used in the world, with a cycle life of about 1000 times, efficiency of 80%-90%, [...]
Electrical energy storage mainly includes supercapacitor energy storage and superconducting energy storage (SMES) (1) Supercapacitor energy storage: an electric double layer structure composed of an activated carbon porous electrode and an electrolyte is used to obtain an extremely large capacitance. Unlike batteries that utilize chemical reactions, the charging and discharging process of supercapacitors is always a [...]
Mechanical energy storage mainly includes pumped storage, compressed air energy storage and flywheel energy storage. (1) Pumped storage: When the grid is low, the excess power is used as the liquid energy medium. The water from the low-lying reservoir is pumped to the high-lying reservoir. When the grid peaks, the water in the high-lying reservoir returns [...]