ES2580879A1 - Thermoelectric plant fed with environmental heat and cooled by regasification of liquefied natural gas (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

The present invention denominated "thermoelectric plant fed with environmental heat and cooled by regasification of the lng", is the use of the regasification process of the lng to be used as a cold focus of a thermoelectric plant. It consists of two rankine cycles and a direct expansion ng turbogenerator, connected in cascade with respect to the cold source formed by the lng regasification process. This plant is fed with heat from both the industry and the environmental environment based on seawater, rivers, lakes or ambient air. The rankine cycles operate with argon and methane respectively, while the direct expansion turbine of gn operates with regasified natural gas (gn) for consumption. (Machine-translation by Google Translate, not legally binding)

Description

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DESCRIPTION

Thermoelectric plant fed with ambient heat and cooled by regasification of liquefied natural gas.

Technical field of the invention

The present thermoelectric plant object of the invention belongs to the technical field of the production of electric energy with ambient heat from seawater, rivers, lakes or atmospheric air and that uses the process of regasification of liquefied natural gas (LNG) as a medium Cooling.

Objective of the invention

The objective of the present invention called Thermoelectric Plant fed with ambient heat and cooled by LNG regasification, is the use of the LNG regasification process to be used as a cold source of a thermoelectric plant fed with heat from the environment, including residual heat, or heat of ambient water or air.

Background of the invention

Conventional LNG regasification plants use various configurations to produce electricity using the cold available during their regasification process. Thus, the LNG regasification plants equipped with the electric heat production system with ambient heat, detected after a tracking of the databases in the regasification field are:

EP2390745 A2, US4995234, US5457951, US6089022, US6367258 and US7493763.

The invention called thermoelectric plant fed with ambient heat and cooled by regasification of LNG differs from those mentioned in both physical configuration and thermal fluids. In the current state of the technology there are no known LNG regasification plants that produce electricity with ambient heat, consisting of two Rankine cycles and a direct expansion GN turbogenerator connected in cascade with respect to the cold source formed by the process of regasification.

Brief Description of the Invention

The thermoelectric plant fed with ambient heat and cooled by LNG regasification consists of two Rankine cycles and a direct expansion GN turbogenerator, cascaded with respect to the cold source formed by the LNG regasification process, using heat from both of the industry as of the environmental environment based on seawater, rivers, lakes or ambient air. Rankine cycles operate with argon and methane respectively, while the GN direct expansion turbine operates with natural gas (GN) regasified and destined for consumption.

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This section describes, by way of illustration and not limitation, the components that constitute the thermoelectric plant fed with ambient heat and cooled by LNG regasification to facilitate the understanding of the invention, where reference is made to the following figures:

Figure 1. Shows the scheme of the thermoelectric plant fed with ambient heat and cooled by regasification of LNG, composed of the following components:

1. LNG warehouse

2. LNG supply pump

3. argon Rankine cycle capacitor

4. argon Rankine cycle feed pump

5. argon Rankine cycle heat regenerator

6. argon Rankine cycle high pressure turbine

7. argon Rankine low pressure turbine

8. Rankine methane cycle condenser

9. methane Rankine cycle feed pump

10. Methane Rankine cycle heat regenerator

11. high pressure turbine of the Rankine methane cycle

12. Low pressure turbine of the Rankine methane cycle

13. Argon and methane heater with ambient heat

14. GN heater with ambient heat

21. 1st stage of the GN direct expansion turbine

22. 2nd stage of the GN direct expansion turbine

23. 3rd stage of the GN direct expansion turbine

24. 4th stage of the GN direct expansion turbine

31. argon and methane Rankine cycles electric generator

32. GN direct expansion turbine electric generator

33. GN distribution line to users.

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The thermoelectric plant fed with ambient heat and cooled by regasification of LNG, consists of two Rankine cycles and a direct expansion GN turbogenerator connected in cascade with respect to the cold focus formed by the LNG regasification process where,

argon Rankine cycle consists of:

- argon capacitor (3) which partially uses the end of the process

regasification of the LNG,

- argon Rankine cycle feed pump (4)

- argon Rankine cycle heat regenerator (5)

- argon Rankine cycle high pressure turbine (6)

- low pressure turbine of the Rankine cycle of argon (7) and where, the Rankine cycle of methane consists of:

- argon condenser (8) which partially uses the cold process

regasification of the LNG,

- methane Rankine cycle feed pump (8)

- argon Rankine cycle heat regenerator (9)

- argon Rankine cycle high pressure turbine (10)

- low pressure turbine of the Argon Rankine cycle (11)

and where, the Rankine argon and methane cycles absorb heat from the heater (13) fed with ambient heat

and where, the turbines of the Rankine cycles of argon and methane (6), (7), (11) and (12), act on the generator (31) by means of a common axis

and where, the GN direct expansion turbine consists of four expansion stages (21), (22), (23) and (24) with intermediate reheating

and where, the GN direct expansion turbine absorbs heat from the heater (14) fed with ambient heat

and where, the GN direct expansion turbine formed by steps (21), (22), (23) and (24) acts on the generator (32) by means of a common axis.

The thermoelectric plant fed with ambient heat and cooled by the regasification of LNG operates by heating and regasifying the LNG, such that the LNG stored in the LNG store (1) is pumped at high pressure and temperature

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Approximately -162 ° C by the GN distribution line to users (33), using the LNG supply pump (2). It crosses the condenser of the Rankine cycle of argon (3) absorbing heat and condensing the argon, then crosses the condenser of the Rankine cycle of methane (8) absorbing heat and condensing the methane, to pass to the heater (14), where it is heated and expanded in the GN direct expansion turbine equipped with four stages with intermediate reheating, finally being evacuated to the GN distribution line to users (33) at the operating pressure.

Description of the preferred embodiment of the invention

The preferred embodiment of the thermoelectric plant fed with ambient heat and cooled by LNG regasification is referred to Figure 1, consisting of:

a) Rankine argon cycle formed by:

- argon condenser (3) which partially uses the cold of the LNG regasification process

- argon Rankine cycle feed pump (4)

- argon Rankine cycle heat regenerator (5)

- argon Rankine cycle high pressure turbine (6)

- low pressure turbine of the Argon Rankine cycle (7)

b) the Rankine cycle of methane formed by:

- methane condenser (8) which partially uses the flushing of the LNG regasification process

- methane Rankine cycle feed pump (8)

- heat regenerator of the Rankine methane cycle (9)

- high pressure turbine of the Rankine methane cycle (10)

- low pressure turbine of the Rankine methane cycle (11) and where,

Rankine argon and methane cycles absorb heat from the heater (13) fed with ambient heat

and where, the turbines of the Rankine cycles of argon and methane (6), (7), (11) and (12) act on the generator (31) by means of a common axis.

c) the GN direct expansion turbine equipped with four expansion stages (21), (22), (23) and (24) with intermediate reheating

and where, the GN direct expansion turbine absorbs heat from the heater (14) fed with ambient heat

and where, the GN direct expansion turbine formed by steps (21), (22), (23) and 5 (24) acts on the generator (32) by means of a common axis.

Claims (2)

5 10 fifteen twenty 25 30 35 40 Four. Five fifty 1. Thermoelectric plant fed with ambient heat and cooled by regasification of LNG which is constituted by: a) a Rankine argon cycle consisting of: - argon condenser (3) which partially uses the cold of the LNG regasification process - argon Rankine cycle feed pump (4) - argon Rankine cycle heat regenerator (5) - argon Rankine cycle high pressure turbine (6) - low pressure turbine of the Argon Rankine cycle (7) b) a Rankine cycle of methane consisting of: - methane condenser (8) which partially uses the flushing of the LNG regasification process, - methane Rankine cycle feed pump (8) - heat regenerator of the Rankine methane cycle (9) - high pressure turbine of the Rankine methane cycle (10) - low pressure turbine of the Rankine methane cycle (11) and where, the Rankine argon and methane cycles absorb heat from the heater (13) fed with ambient heat and where, the turbines of the Rankine cycles of argon and methane (6), (7), (11) and (12) act on the generator (31) by means of a common axis. c) the GN direct expansion turbine equipped with four expansion stages (21), (22), (23) and (24) with intermediate reheating and where, the GN direct expansion turbine absorbs heat from the heater (14) fed with ambient heat and where, the GN direct expansion turbine formed by stages (21), (22), (23) and (24) acts on the generator (32) by means of a common axis. 2. Operation procedure of the thermoelectric plant fed with ambient heat and cooled by LNG regasification according to the first claim, characterized in that it operates by heating and regasifying the LNG in such a way that the LNG stored in the LNG store (1) is pumped at high pressure and approximate temperature of -162 ° C by the line of distribution of GN to users (33), by means of the pump LNG supply (2). It crosses the condenser of the Rankine cycle of argon (3) absorbing heat and condensing the argon, then crosses the condenser of the Rankine cycle of methane (8) absorbing heat and condensing the methane, to pass to the heater (14), where it is heated and expanded in the 5 GN direct expansion turbine equipped with four stages with intermediate reheating, finally being evacuated to the GN distribution line to users (33) at the operating pressure.