Gas turbine unit for generating electricity and heat and operating method thereof

Abstract

Abstract PURPOSE: To raise total efficiency by changing the geometry of a low pressure gas turbine so as to change the speed of the low pressure gas turbine, and regulating electric power to a desired value. CONSTITUTION: An electrical generator 12 is connected a high pressure gas turbine 10. Heat exchanging between exhaust gas from a low pressure gas turbine 13 and compressed air from a high pressure compressor 11 is effected in a recuperator 18. An intermediate cooler 22 is arranged between a low pressure compressor 14 and the high pressure compressor 11, and an exhaust gas heat exchanger 19 is arranged in an exhaust gas system for generating hot water. The speed of the low pressure gas turbine 13 is changed by changing the geometry of the low pressure gas turbine 13 by means of a regulator 15 so as to regulate electric power to a desired value. Heat is regulated to a desired value by changing the flow rate in a by-pass 20 of the recuperator 18. Thus, it is possible to raise the total efficiency of both electricity and heat.

Inventors

• 👤 Henrik Harboe
• 👤 ヘンリク　ハルボエ
• 👤 Kirklund Ben
• 👤 ベン　キルクルンド

Bibliographic Details