초록 ▼

A two stage expansion and single stage combustor compressed air energy storage cycle that employs a heat exchanger to raise the temperature of the compressed air before it enters a high pressure expander. A combustor heats the exhaust from the high pressure expander and creates a working gas to driv

A two stage expansion and single stage combustor compressed air energy storage cycle that employs a heat exchanger to raise the temperature of the compressed air before it enters a high pressure expander. A combustor heats the exhaust from the high pressure expander and creates a working gas to drive a low pressure expander. The exhaust from the low pressure expander is supplied to the heat exchanger to raise the temperature of the compressed incoming air. A portion of the exhaust of the high pressure expander is cooled and employed in a cooling circuit within the low pressure expander. A starter valve in the compressed air input circuit finely tunes the incoming air during startup. The startup air flow is heated by an auxiliary duct burner until the low pressure turbine exhaust reaches operating temperature and is sufficient to heat the incoming air under normal operating conditions.

대표청구항 ▼

[ What is claimed is:] [1.]1. A compressed air energy storage cycle power generation system comprising:a heat exchanger having a primary and secondary side for heating compressed air introduced into the secondary side of the heat exchanger;a first turbine expander connected to an outlet on the secon

[ What is claimed is:] [1.]1. A compressed air energy storage cycle power generation system comprising:a heat exchanger having a primary and secondary side for heating compressed air introduced into the secondary side of the heat exchanger;a first turbine expander connected to an outlet on the secondary side of the heat exchanger for expanding compressed air heated in the heat exchanger through the turbine to create rotation of a first turbine shaft;a combustor having a compressed air intake communicably coupled to an exhaust on the first turbine for communicating air expanded through the first turbine and exiting the first turbine exhaust to the combustor, and a fuel inlet for mixing fuel with the expanded air and igniting the air fuel mixture in a combustion chamber within the combustor to create a working gas which is exhausted through a combustor outlet;a second turbine expander having a number of stationary and rotating components including an intake for receiving the working gas and expanding the working gas through the second turbine to create rotation of a second turbine shaft;a conduit coupled at one end to an exhaust on the second turbine through which the working gas exits and at the other end to the primary side of the heat exchanger to place the exhausted working gas in heat exchange relationship with the secondary side of the heat exchanger to heat incoming compressed air;a bleed line having a first and second end, coupled at the first end to the exhaust on the first turbine;a cooler having an inlet and outlet, communicably coupled at the cooler inlet to the second end of the bleed line and operable to lower the temperature of a portion of the expanded air bled at the first turbine exhaust; anda cooling conduit connected to the outlet of the cooler at a first end and communicably coupled to a cooling circuit in the second turbine for directing the cooled expanded air to the cooling circuit in the second turbine for cooling a turbine component.