Quatro-generation system

Patent metadata

Field	Value
Publication number	US-10138758-B2
Application number	US-201415021097-A
Country	US
Kind code	B2
Filing date	Sep 4, 2014
Priority date	Sep 25, 2013
Publication date	Nov 27, 2018
Grant date	Nov 27, 2018

Abstract

The quatro generation system of the present invention includes: a power generation engine driven by fuel gas; an exhaust-heat boiler configured to utilize energy of exhaust gas discharged from the power generation engine to produce steam from boiler water; a boiler-water circulation device configured to supply the steam produced by the exhaust-heat boiler to a steam-energy recovery unit, and to return condensed water of the steam to the exhaust-heat boiler after the steam-energy recovery unit recovers energy of the steam; a condensation economizer configured to utilize condensation latent heat of exhaust gas discharged from the exhaust-heat boiler to heat a heat medium; and a heat-medium circulation device configured to supply the heat medium heated by the condensation economizer to a thermal-energy recovery unit, and to return the heat medium to the condensation economizer after the thermal-energy recovery unit recovers energy of the heat medium.

First claim

The invention claimed is:

1. A quarto-generation system, comprising:
a power generation engine driven by fuel gas;
an exhaust-heat boiler configured to utilize energy of exhaust gas discharged from the power generation engine to produce steam from boiler water;
a boiler-water circulation device configured to supply the steam produced by the exhaust-heat boiler to a steam-energy recovery unit, and to return condensed water of the steam to the exhaust-heat boiler after the steam-energy recovery unit recovers energy of the steam;
a condensation economizer configured to utilize condensation latent heat of exhaust gas discharged from the exhaust-heat boiler to heat a heat medium;
a heat-medium circulation device configured to supply the heat medium heated by the condensation economizer to a thermal-energy recovery unit, and to return the heat medium to the condensation economizer after the thermal-energy recovery unit recovers energy of the heat medium; and
an exhaust-gas condensed water supply device configured to supply condensed water of the exhaust gas condensed by the condensation economizer to a water consumer.

2. The quarto-generation system according to claim 1 ,
wherein the water consumer comprises a complex facility or an area comprising a plurality of elements which includes at least one of a residence, a tenant shop, or an office.

3. The quarto-generation system according to claim 1 , wherein the power generation engine comprises: a gas turbine driven by the fuel gas; and a first generator driven by shaft output of the gas turbine.

4. The quarto-generation system according to claim 1 ,
wherein the exhaust-heat boiler comprises an exhaust-gas reheat boiler configured to utilize the exhaust gas discharged from the power generation engine as combustion air.

5. The quarto-generation system according to claim 1 ,
wherein the thermal energy recovery unit comprises a heat-medium heat exchanger configured to recover energy from the heat medium as a heat source for heating air or water in a thermal-energy consumer which comprises a complex facility or an area comprising a plurality of elements including at least one of a residence, a tenant shop, or an office.

6. The quarto-generation system according to claim 1 ,
wherein the steam energy recovery unit comprises:
a steam turbine driven by the steam; and
a second generator driven by shaft output of the steam turbine.

7. The quarto-generation system according to claim 1 ,
wherein the steam-energy recovery unit comprises a steam heat exchanger configured to recover energy from the steam as a heat source for air conditioning or freezing in a thermal-energy consumer which comprises a complex facility or an area comprising a plurality of elements including at least one of a residence, a tenant shop, or an office.

8. The quarto-generation system according to claim 1 , further comprising
an exhaust-gas heat exchanger configured to recover energy of the exhaust gas discharged from the condensation economizer.

Assignees

• Mitsubishi Heavy Ind Ltd

Inventors

• Yagita Hiroyuki
• Abe Kouji
• Koide Takao
• Noguchi Toshihide
• Nakai Tomoaki
• Ishikawa Hiroaki
• Esashi Hiroyuki
• Hyodo Jun

Classifications

• F02G5/02

  Profiting from waste heat of exhaust gases · CPC title

• F01K5/02

  used in regenerative installation · CPC title

• F02G5/04

  in combination with other waste heat from combustion engines · CPC title

• Y02E20/16

  Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT] · CPC title

• F02C6/18 Primary

  using the waste heat of gas-turbine plants outside the plants themselves, e.g. gas-turbine power heat plants (using waste heat as source of energy for refrigeration plants F25B27/02; using the waste heat of a gasturbine for steam generation or in a steam cycle see F01K23/10) · CPC title