Circulatory osmotic pressure electric power generation system and method, phase control method for working medium, and working medium for circulatory osmotic pressure electric power generation

Patent metadata

Field	Value
Publication number	US-9863405-B2
Application number	US-201514615757-A
Country	US
Kind code	B2
Filing date	Feb 6, 2015
Priority date	Feb 28, 2014
Publication date	Jan 9, 2018
Grant date	Jan 9, 2018

Abstract

An embodiment provides a working medium to be used in a circular osmotic pressure electric power generation system. The working medium comprises water and an inducing-liquid. The working medium, under conditions of a temperature of 5° C. to 35° C. and a pressure of 1 atmosphere, is in (1) a state of a liquid-liquid mutually dissolved two-component mixed solution when a concentration of the water or the inducing-liquid in the total amount of the water and the inducing-liquid is 10% by weight or lower, and (2) a state of being separated into the water phase and the inducing-liquid phase when the concentration of the water or the inducing-liquid in the total amount of the water and the inducing-liquid is higher than 10% by weight.

First claim

What is claimed is:

1. A working medium for using a circular osmotic pressure electric power generation system,
wherein the working medium comprises a water and an inducing-liquid, the inducing-liquid comprising 2-butoxyethanol and 2,2,3,3,3-pentafluoro-1-propanol which has a mechanism as a phase controlling agent with respect to the 2-butoxyethanol, under conditions of a temperature of 5° C. to 35° C. and a pressure of 1 atmosphere, the working medium is in:
(1) a state in which the including-liquid is mutually dissolved with the water when a concentration of the water in a total amount of the water and the inducing-liquid is 10% by weight or lower, or a concentration of the inducing-liquid in the total amount of the water and the inducing-liquid is 10% by weight or lower; and
(2) a state in which the water and the inducing-liquid are separated from one another when the concentration of the water in the total amount of the water and the inducing-liquid is higher than 10% by weight, or the concentration of the inducing-liquid in the total amount of the water and the inducing-liquid is higher than 10% by weight, and
the circular osmotic pressure electric power generation system comprises an osmotic pressure generator comprising a first chamber to accommodate an inducing-liquid, a second chamber to accommodate a water and a osmosis membrane interposing between the first chamber and the second chamber, configured to generate electric power by driving a turbine by a flow of liquid in which the inducing-liquid is mutually dissolved with the water, wherein the flow of liquid is produced by a difference in osmotic pressure.

Assignees

• Toshiba Kk

Inventors

• Sano Kenji
• Imada Toshihiro

Classifications

• F03B17/06 Primary

  using liquid flow {with predominantly kinetic energy conversion}, e.g. of swinging-flap type {, "run-of-river", "ultra-low head" (F03B13/264 takes precedence)} · CPC title

• B01D61/005

  Osmotic agents; Draw solutions · CPC title

• Y02E10/28

  Cross-Sectional Technologies · mapped topic

• F03G7/04 Primary

  using pressure differences or thermal differences occurring in nature (F03G7/06 takes precedence) · CPC title

• F05B2210/13

  mixed, e.g. two-phase fluid · CPC title