System combining power generation apparatus and desalination apparatus

Abstract

In a system combining a power generation apparatus and a desalination apparatus, the power generation apparatus includes a circulation circuit in which a first heat exchanger, an expander, a second heat exchanger having a space, the second heat exchanger for evaporating seawater and generating water vapor, and a working medium pump are connected in series, and a power generator, and the desalination apparatus includes a suction pump for suctioning a gas in the space, a control device for driving the suction pump in such a manner that an atmospheric pressure in the space becomes a saturated water vapor pressure, a condenser for condensing the water vapor led from the space, and a sweet water storage tank for storing sweet water (W) condensed in the condenser.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a system combining a power generation apparatus and a desalination apparatus.[0003]2. Description of the Related Art[0004]Conventionally, a system of generating electric power and also generating sweet water from seawater (performing water generation) is known. For example, Japanese Patent Application Laid-Open No. 2007-309295 discloses a system combining a power generation apparatus and a desalination apparatus. The power generation apparatus includes a circulation circuit in which a first heat exchanger for evaporating a working medium, an expander provided on the downstream side of this first heat exchanger, a second heat exchanger for exchanging heat between the working medium exhausted from this expander and seawater supplied from an exterior, and a working medium pump for feeding the working medium flowing out from this second heat exchanger to the first heat exchanger are connecte...

AI Technical Summary

Benefits of technology

The present invention provides a system for generating sweet water from seawater without using a reverse osmosis membrane and a pressurized pump, which requires large power. Instead, a suction pump is used to evaporate the seawater by lowering the atmospheric pressure in a space and generate enough water vapor for condensation in a condenser. This reduces the necessary electric power and prevents carbon dioxide generation. The control device ensures that the space becomes a saturated water vapor pressure, allowing for efficient evaporation of the seawater.

Problems solved by technology

Further, the suction pump only requires such mechanical power that the atmospheric pressure in the space can be lowered to the saturated water vapor pressure.

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