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Title: SECO2 Stored( Energy In CO2)-Cold Recovery From Base Load LNG Vaporization For On-Peak Electric Power Generation
Author: John S. Andrepont, Don H. Goers, Richard J. Kody
Source: American Gas Association 1990
Year Published: 1990
Abstract: An electric power generation system is described that efficiently utilizes the recovered cold from base-load LNG vaporization in conjunction with low temperature thermal energy storage to produce power during on-peak (high demand) periods, when the value of electric energy is maximized. The on-peak power-production system employs a high-efficiency Rankine power cycle utilizing carbon dioxide (CO2) as the working fluid specifically, the CO2 cycle is designed as a bottoming cycle driven by the high-temperature waste heat from a combustion turbine exhaust and using a low-temperature heat sink for condensing the discharge of the CO2 expanders. The heat sink is an isothermal mass of CO2 liquid-sohd slush at its triple point. Recovered cold from base-load LNG vaporization is used to recharge the heat sink by converting CO2 liquid to sohd simultaneous base-load power generation also can be accomphshed if desired.

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