High efficiency ocean thermal difference power generating system using liquid-vapor ejector and motive pump

Patent metadata

Field	Value
Publication number	US-9957955-B2
Application number	US-201514895280-A
Country	US
Kind code	B2
Filing date	Mar 5, 2015
Priority date	Dec 17, 2014
Publication date	May 1, 2018
Grant date	May 1, 2018

Abstract

There is provided a high efficiency ocean thermal difference power generating system by using liquid-vapor ejector and motive pump comprising: an evaporator for changing transferred refrigerant liquid into refrigerant vapor with high temperature and high pressure by the thermal exchange with surface seawater; a vapor-liquid divider which is installed at the outlet part of the evaporator and divides the refrigerants to liquid-state refrigerant and vapor-state refrigerant respectively; a distributor which is installed at the inlet of the evaporator and distributes the refrigerants flowed into the evaporator to multi-paths; a turbine for generating electric power by using the high pressure refrigerant vapor transferred from the liquid-vapor divider or the evaporator; a motive pump for increasing the pressure of the refrigerant liquid distributed from the distributor or the liquid-vapor divider; a liquid-vapor ejector for mixing the low pressure refrigerant vapor which passed the turbine and the high pressure refrigerant liquid which passed a motive pump, thereby proceeding expansion and compression; a condenser for condensing the refrigerants which was mixed in the liquid-vapor ejector by the thermal exchange with deep seawater; and a refrigerant circulation pump for increasing the pressure of the refrigerants which was condensed in the condenser up to the evaporation pressure and for circulating.

First claim

What is claimed is:

1. A high efficiency ocean thermal difference power generating system using liquid-vapor ejector and motive pump comprising:
an evaporator for changing transferred refrigerant liquid into high pressure refrigerant vapor by thermal exchange with surface seawater;
a turbine for generating electric power by using the high pressure refrigerant vapor transferred from the evaporator;
a liquid-vapor ejector for mixing low pressure refrigerant vapor which passed the turbine and high pressure refrigerant liquid which passed a motive pump, thereby proceeding expansion and compression;
a condenser for condensing the refrigerants which were mixed in the liquid-vapor ejector by thermal exchange with deep seawater;
a refrigerant circulation pump for increasing the pressure of the refrigerants which were condensed in the condenser up to the evaporation pressure and for circulating; and
a distributor for distributing the refrigerants which were compressed in the refrigerant circulation pump to the evaporator and the motive pump.

2. The high efficiency ocean thermal difference power generating system using liquid-vapor ejector and motive pump according to claim 1 , wherein the refrigerant liquid which passed the distributor is transferred to the evaporator through the refrigerant circulation pump, and the distributed refrigerant liquid is used as liquid for the motive parts of the liquid-vapor ejector.

3. The high efficiency ocean thermal difference power generating system using liquid-vapor ejector and motive pump according to claim 1 , wherein the refrigerant liquid is compressed to high pressure through the motive pump, and flowed into the motive parts of the liquid-vapor ejector.

4. A high efficiency ocean thermal difference power generating system using liquid-vapor ejectors and motive pumps comprising:
an evaporator for changing transferred refrigerant liquid into high pressure refrigerant vapor by thermal exchange with surface seawater;
a turbine for generating electric power by using the high pressure refrigerant vapor transferred from the evaporator;
a low-level liquid-vapor ejector for mixing low pressure refrigerant vapor which passed the turbine and high pressure refrigerant liquid which passed a low-level motive pump, thereby proceeding expansion and compression;
a vapor-liquid divider for dividing the refrigerants mixed in the low-level liquid-vapor ejector to liquid-state refrigerant and vapor-state refrigerant respectively;
a high-level liquid-vapor ejector for flowing the refrigerant which passed the vapor-liquid divider, and the refrigerant which passed a high-level motive pump compressing the liquid-state refrigerant divided from the vapor-liquid divider thereinto;
a condenser for condensing the refrigerants mixed in the high-level liquid-vapor ejector by the thermal exchange with deep seawater;
a refrigerant circulation pump for increasing the pressure of the refrigerants which were condensed in the condenser up to the evaporation pressure and for circulating; and
a distributor for distributing the refrigerants which were compressed in the refrigerant circulation pump to the evaporator and the low-level motive pump.

5. The high efficiency ocean thermal difference power generating system using liquid-vapor ejectors and motive pumps according to claim 4 , further comprising a high-level liquid-vapor ejector so as to decrease the pressure at the outlet part of the low-level liquid-vapor ejector and decrease the pressure at inlet part of the low-level liquid-vapor ejector and the outlet part of the turbine, thereby increasing the electric power generated in the turbine.

6. The high efficiency ocean thermal difference power generating system using liquid-vapor ejectors and motive pumps according to claim 4 , wherein the refrigerant liquid which passed the distributor is transferred to the evaporator through the refrigerant circulation pump, and the distributed refrigerant liquid is used as liquid for the motive parts of the low-level liquid-vapor ejector and the high-level liquid-vapor ejector.

7. The high efficiency ocean thermal difference power generating system using liquid-vapor ejectors and motive pumps according to claim 4 , wherein the refrigerant liquid is compressed to high pressure through the low-level motive pump and the high-level motive pump, and flowed into the motive parts of the low-level liquid-vapor ejector and the high-level liquid-vapor ejector, respectively.

Assignees

• Korea Inst Ocean Sci & Tech
• Korea Inst Ocean Sci & Tech

Inventors

• Kim Hyeon-Ju
• Lee Ho-Saeng
• Cha Sang-Won
• Jung Young-Kwon
• Yoon Jung-In
• Son Chang-Hyo
• Seol Seong-Hun
• Ye Byeong-Hyo

Classifications

• F01K7/16

  the engines being only of turbine type (the engines using steam of critical or overcritical pressure F01K7/32; the engines being of extraction or non-condensing type F01K7/34) · CPC title

• Y02E10/34

  Cross-Sectional Technologies · mapped topic

• F03G7/05 Primary

  Ocean thermal energy conversion, i.e. OTEC · CPC title

• F01K5/00 Primary

  Plants characterised by use of means for storing steam in an alkali to increase steam pressure, e.g. of Honigmann or Koenemann type · CPC title

• Y02E10/30

  Energy from the sea, e.g. using wave energy or salinity gradient · CPC title