Thermal Economic Analysis of Compressed Air Storage System.
According to principle (1), in subsystems 1, 2 and 6 of the system shown, the unit smoke flow cost of the input subsystem is calculated according to the market price. Taking subsystem 1 as an example, the supplementary equation is: according to principle (2) Then, for the multi-product subsystems 4 and 5, the principle of equal price of each product smoke establishes two supplementary equations. The supplementary equation that can be established by the subsystem No. 4 in the research system is: according to principle (3), the subsystem's "fuel "For two-line flow, the unit price of the input and output subsystems is equal. Three equations can be established in the research system. Since the intercooler and aftercooler are considered, the subsystem is not divided, but the input and The unit price of the smoke of the output cooler is equal, and the two equations and the subsystem 3 can be used to establish a supplementary equation: there is no internal product in the research system, and the eight equations required can be established according to the above three principles. The natural gas price is 2 yuan / m3, the output price of the supercritical compressed air energy storage system is 0.475 SkW-h), which is lower than the CAES system output price 0.531SKkW.h), and both are lower than the peak and valley electricity price of 0.753 yuan / ( kWh), indicating that the supercritical compressed air storage system is more economical.
