KR102135056B1 - Receiver for refrigerant storage using membrane and cooling system - Google Patents

Abstract

The present invention relates to a refrigerant storage type receiver using a built-in membrane and a cooling system, and more specifically, a U-shaped membrane and a cooling system are installed in a receiver, which is a refrigerant storage tank, to install a refrigerant inlet and a valve at the top, and a bottom. When the compressed air inlet and the valve are installed to supply high pressure above the refrigerant vapor pressure at the bottom of the membrane, the refrigerant is injected into the seawater temperature difference power generation system, and by installing a cooling system, the built-in membrane that drops the temperature of the tank below the condensation temperature during transportation of the refrigerant And a refrigerant storage type receiver using a cooling system.

Description

Recipient for refrigerant storage using membrane and cooling system

The present invention relates to a receiver for storing a refrigerant in a difference in seawater temperature, and a refrigerant storage type receiver using an internal membrane and a cooling system that also serves as a refrigerant storage tank.

In the case of the seawater temperature difference power generation system, it is a system that generates power by using the temperature difference between the ocean surface water and the deep ocean water.

It is to produce electricity by using a refrigerant such as R32 that easily evaporates at low temperatures, and then heat-exchanging it with the surface water in the evaporator and then operating the turbine with vaporized refrigerant vapor.

These refrigerants are stored and transported in the refrigerant storage unit, injected prior to system operation, and recovered and stored in the refrigerant storage tank again during system inspection and repair.

In the case of the refrigerant storage tank, when storing the refrigerant, the maximum pressure of the refrigerant vapor that is partially evaporated in the refrigerant storage tank must be sufficiently endured, and an internal pressure tank capable of withstanding the maximum pressure during system operation is required.

Accordingly, the development of a device capable of satisfying these conditions is emerging.

Republic of Korea Patent Publication No. 10-2011-0061844 (released on June 10, 2011)

The present invention was devised to solve the above problems, and an object of the present invention is to install a U-shaped membrane inside the refrigerant storage unit, to install an inlet and outlet valve for circulating the refrigerant in the upper refrigerant storage unit, and refrigerant When a high pressure above the maximum pressure of the refrigerant vapor evaporated inside the refrigerant storage unit is injected under the storage unit, the refrigerant can be injected into the seawater temperature difference power generation system, and when the seawater temperature difference generation system is moved, the refrigerant is mostly recovered and stored in the refrigerant storage unit And, when transporting, close the upper and lower valves of the refrigerant storage unit to store the refrigerant.

In addition, when the refrigerant in the liquid phase is recovered and moves the stored refrigerant tank, part of the refrigerant in the liquid phase stored in the refrigerant storage part is evaporated under the influence of the external temperature, and this refrigerant vapor increases the pressure in the refrigerant storage part. Cooling with to lower the pressure in the refrigerant storage section, in order to effectively solve this,

Cooling water piping is installed outside the refrigerant storage unit, and external insulation is used to use deep ocean water used as a heat needle in the seawater temperature difference generation system or additionally, a cooler is supplied to the cooling water piping installed outside the refrigerant storage unit to store refrigerant. By lowering the negative temperature below the condensation temperature of the liquid refrigerant in the refrigerant storage unit, the pressure in the refrigerant storage unit can be effectively reduced.

Therefore, by manufacturing the temperature-controlled refrigerant storage unit according to the adiabatic or cold fluid supply capable of injecting and recovering the refrigerant as described above, with a single or multiple receivers, the pressure and temperature of the upper and lower separation membranes can be controlled, thereby storing the refrigerant. It is to provide a refrigerant storage type receiver using an internal membrane and a cooling system, which can be used as a receiver serving as a tank.

Other objects and advantages of the present invention will be described below, and will be learned by embodiments of the present invention. In addition, the objects and advantages of the present invention can be realized by means and combinations indicated in the claims.

The present invention as a means for solving the above problems,

Used in the seawater temperature difference power generation system, installed between the evaporator 120 and the condenser 140, in the receiver 100 is injected refrigerant for operating the turbine 130, the receiver 100 is the refrigerant Is stored therein, the refrigerant storage unit 10 is provided with refrigerant outlet valves (V1, V2) are installed so that the injection and recovery of refrigerant; An insulating layer 20 formed on the outer periphery of the refrigerant storage unit 10; Cooling water line 30 is formed in a plurality of the heat insulating layer 20 to control the temperature of the refrigerant storage unit 10 by allowing the cooling water to cool the refrigerant storage unit 10 to flow; The refrigerant storage unit 10, the membrane 40 is installed to be installed expandably on the inner periphery; A pressure line 50 which is connected to the membrane 40 and injects or discharges a pressurized fluid for expanding the membrane 40 to regulate the pressure in the refrigerant storage unit 10; It is composed of, it is possible to inject and recover the refrigerant in the refrigerant storage unit 10, it can be used as a refrigerant storage tank, it is characterized in that it is possible to control the temperature and pressure inside.

In addition, the cooling water line 30 is used as a cooling water by branching a part of the deep water used for cooling the refrigerant vapor in the condenser 140, or using a separate deep water that does not go through the condenser 140 as cooling water Is done.

As described above, the present invention is to install the internal membrane, by using deep ocean water or additionally using a freezer, by effectively reducing the pressure of the refrigerant storage unit, refrigerant vapor is partially evaporated in the refrigerant storage unit when storing the refrigerant It has the effect of being able to withstand the maximum pressure and the maximum pressure during system operation.

In addition, the present invention has an effect that can be used as a receiver serving as a refrigerant storage tank.

1 is an overall system configuration diagram of an embodiment showing a refrigerant storage type receiver using an embedded membrane and a cooling system according to the present invention.
Figure 2 is an overall system configuration diagram of an embodiment showing a refrigerant storage type receiver using an internal membrane and a cooling system according to the present invention in which an auxiliary cooling device is used.
Figure 3 is a view of one embodiment showing the internal appearance of the receiver serving as a refrigerant storage tank.
Figure 4 is a view of an embodiment showing a mobile receiver equipped with a cooling device.

Before describing the various embodiments of the present invention in detail, it will be appreciated that its application is not limited to the details of the configurations and arrangements of components described in the following detailed description or illustrated in the drawings. The present invention can be implemented and implemented in other embodiments and can be performed in a variety of ways. In addition, the device or element orientation (eg "front", "back", "up", "down", "top", "bottom") The expressions and predicates used herein with respect to terms such as “, “left”, “right”, “lateral”, etc. are only used to simplify the description of the present invention, and related devices Or you will see that the element simply indicates or does not mean that it should have a specific direction. Also, terms such as “first” and “second” are used in the present application and the appended claims for explanation and are not intended to indicate or mean relative importance or purpose.

The present invention has the following features to achieve the above object.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, the terms or words used in the present specification and claims should not be construed as being limited to ordinary or lexical meanings, and the inventor appropriately explains the concept of terms to explain his or her invention in the best way. Based on the principle that it can be defined, it should be interpreted as meanings and concepts consistent with the technical spirit of the present invention.

Therefore, the embodiments shown in the embodiments and the drawings described in this specification are only the most preferred embodiments of the present invention and do not represent all of the technical spirit of the present invention, and thus can replace them at the time of application. It should be understood that there may be equivalents and variations.

Looking at one embodiment according to the present invention,

Used in the seawater temperature difference power generation system, installed between the evaporator 120 and the condenser 140, in the receiver 100 is injected refrigerant for operating the turbine 130, the receiver 100 is the refrigerant Is stored therein, the refrigerant storage unit 10 is provided with refrigerant outlet valves (V1, V2) are installed so that the injection and recovery of refrigerant; An insulating layer 20 formed on the outer periphery of the refrigerant storage unit 10; A cooling water line 30 formed in a plurality of the heat insulating layers 20 so as to flow cooling water for cooling the refrigerant storage unit 10 to control the temperature of the refrigerant storage unit 10; The refrigerant storage unit 10, the membrane 40 is installed to be installed expandably on the inner periphery; A pressure line 50 which is connected to the membrane 40 and injects or discharges a pressurized fluid for expanding the membrane 40 to regulate the pressure in the refrigerant storage unit 10; It is composed of, it is possible to inject and recover the refrigerant inside the refrigerant storage unit 10, it can be used as a refrigerant storage tank, it is characterized in that it is possible to control the temperature and pressure inside.

In addition, the cooling water line 30 is used as a cooling water by branching a part of the deep water used for cooling the refrigerant vapor in the condenser 140, or using a separate deep water that does not go through the condenser 140 as cooling water Is done.

In addition, the cooling water line 30 is characterized in that the cooling device 60 for supplying cooling water is connected and used.

In addition, when the refrigerant 100 is injected, the pressure of the piping (A) at the rear end of the receiver 100 of the seawater temperature difference power generation system is higher than the internal pressure of the receiver 100, and only the refrigerant pump 110 is injected. If this is not possible, by increasing the volume of the membrane 40 by injecting a pressurized fluid at a higher pressure than the pressure inside the receiver 100 through the pressure line 50, the volume occupied by the refrigerant inside the receiver 100 By increasing the pressure by reducing the pressure, the pressure inside the receiver 100 rises rather than the pressure of the piping (A) at the rear end of the receiver 100 of the seawater temperature difference power generation system, so that refrigerant injection into the seawater temperature difference power generation system is possible. It is characterized by making it.

In addition, when the receiver 100 recovers the refrigerant, when the pressure inside the receiver 100 is higher than the pressure in the piping (B) of the receiver 100 of the seawater temperature difference power generation system, the refrigerant cannot be recovered. By circulating cooling water or deep water of the cooling device 60 through the cooling water line 30, the temperature and pressure inside the receiver 100 are reduced to recover the refrigerant, or the pressurized fluid in the membrane 40 is external. By discharging to, to secure the internal volume of the membrane 40 to lower the internal pressure is characterized in that the recovery of the refrigerant is possible.

In addition, when the refrigerant is transported using the receiver 100 as a refrigerant storage tank, when the inside pressure of the receiver 100 evaporates due to external influences and the internal pressure increases, the receiver 100 is wrapped around the outside. It is characterized in that by circulating the cooling water through the cooling water line 30, the pressure inside the receiver 100 is reduced to enable stable transportation.

In addition, the seawater temperature difference power generation system is installed at the rear end of the receiver 100, a refrigerant pump 110 for circulating the refrigerant as a working fluid; An evaporator (120) for vaporizing the refrigerant supplied from the refrigerant pump (110) by heat exchange with the surface water of the ocean to vaporize the refrigerant; A turbine 130 in which kinetic energy is converted into electricity by supplying and rotating the refrigerant vapor; A condenser 140 that circulates the refrigerant passing through the turbine 130 and exchanges it with deep ocean water to condense and liquefy it to circulate inside the receiver 100; It characterized in that it comprises.

Hereinafter, a refrigerant storage type receiver using an embedded membrane and a cooling system according to a preferred embodiment of the present invention will be described in detail with reference to FIGS. 1 to 4.

The refrigerant storage type receiver 100 using the built-in membrane and cooling system of the present invention includes a refrigerant storage unit 10, an insulating layer 20, a cooling water line 30, a membrane 40, and a pressurizing line 50. .

First, the configuration of the seawater temperature difference power generation system in which the refrigerant storage type receiver 100 of the present invention is used is as follows.

As shown in Figure 1, in the case of a seawater temperature difference power generation system, the refrigerant (liquid working fluid (R32, etc.)) stored inside the receiver 100 is supplied to the evaporator 120 using the refrigerant pump 110, and vaporized The refrigerant rotates the turbine 130 to convert kinetic energy into electricity. The refrigerant that has passed through the turbine 130 is liquefied again in the condenser 140 and circulates to the receiver 100 to repeat.

The seawater temperature difference power generation system for this is composed of a receiver 100, a refrigerant pump 110, an evaporator 120, a turbine 130, and a condenser 140.

For the initial operation of the seawater temperature difference power generation system, the refrigerant charged in the receiver 100 must be injected into the seawater temperature difference power generation system, and for this purpose, the refrigerant pump 110 is operated to suck the refrigerant from the receiver 100 Refrigerant is transferred and injected into each device of the seawater temperature difference power generation system.

In the present invention

When the refrigerant is injected from the receiver 100 into the seawater temperature difference power generation system, the pressure of the rear end pipe A of the receiver 100 of the seawater temperature difference power generation system is caused by the evaporation of the refrigerant from the piping of the seawater temperature difference power generation system. If it is higher than the pressure of (100) and the injection of the refrigerant becomes impossible only by driving the refrigerant pump 110, the pressure line 50 and the pressure device 53 inside the U-shaped membrane 40 inside the receiver 100 to be described later ) By injecting fluid such as air and fresh water at high pressure, increasing the volume of the membrane 40 to increase the pressure inside the receiver 100, and injecting refrigerant from the receiver 100 into the seawater temperature difference power generation system. Is to make this happen.

In addition, when disassembling and transporting the plant, the refrigerant pump 110 or the compressor is operated in a state in which the rear end (refrigerant pump inlet) valve of the receiver 100 is closed to recover the refrigerant, or the remaining liquid in the seawater temperature difference power generation system or The gaseous refrigerant is recovered by the receiver 100.

At this time, the refrigerant is heat exchanged with low-temperature seawater (deep water) in the condenser 140 and then stored in the receiver 100 after condensation. According to the embodiment of the user, by controlling a plurality of supply control valves (V5, V6) to the supply pipe connected to the condenser to supply the deep water, the condenser 140 to branch a portion of the deep water used for cooling the refrigerant vapor cooling water It can be used as, or to use a separate deep water that does not go through the condenser 140 as cooling water.

In addition, when the low temperature seawater is not used in the condenser 140 depending on the situation, as shown in FIG. 2, separate cooling devices (coolers) 60 and cooling water lines 30 installed outside the receiver 100 Through, the receiver 100 is cooled to lower the internal pressure to condense and store the refrigerant at low temperature and low pressure.

When the refrigerant is recovered, the pressure inside the receiver 100 is higher than the pressure of the piping (B) in the front of the receiver 100 of the seawater temperature difference power generation system, so that the refrigerant is not recovered, the fluid inside the membrane 40 is discharged. By reducing the pressure by reducing the volume inside the receiver 100, the refrigerant can be recovered from the system to the receiver 100.

In addition, in the case of the liquid refrigerant stored in the receiver 100, the receiver 100 is separated from the seawater temperature difference power generation system in a state where the inlet valve V1 and the outlet valve V2 are closed, and the seawater temperature difference power generation system It can be used as a refrigerant storage tank for transportation.

When the liquid state refrigerant inside the receiver 100 evaporates due to an external environment during transport, and the internal pressure increases, the receiver 100, through the cooling device 60 and the cooling water line 30 outside the receiver 100 ) To lower the internal pressure to enable stable transport.

The coolant or cold seawater supplied in the process of recovering and storing the refrigerant is selectively or simultaneously supplied to the cooling water piping of the condenser 140 and the receiver 100 through the switching valve V installed in the piping, respectively. After cooling the group 100, it is discharged to the outside.

When the refrigerant is transported by using the receiver 100 as a refrigerant storage tank, the cooling water supplied to the receiver 100 can be replaced with a low-temperature refrigerant using the cooling device 60, and in a separate cooling cycle. It would also be possible to utilize low-temperature seawater used as a heat source to condense refrigerant.

In the following, as described above, the structure of the receiver 100 of the present invention used as a refrigerant storage tank will be described in detail.

The receiver 100 includes a refrigerant storage unit 10, an insulating layer 20, a cooling water line 30, a membrane 40, a compressed air inlet 51 and a compressed air outlet 52 provided with a pressurized line ( 50).

The refrigerant storage unit 10 is a housing having a circular cross section with an empty interior, and two refrigerant circulation pipes P for circulating refrigerant are connected to the front and rear ends of the refrigerant storage unit 10 in communication. Inlet/outlet valves (V1, V2) are installed.

The heat insulating layer 20 is formed on the outer periphery of the refrigerant storage unit 10, and by allowing cooling water to cool the refrigerant storage unit 10 to flow through the heat insulating layer 20, the refrigerant storage unit 10 The coolant line 30 for adjusting the temperature is spaced apart from each other around the refrigerant storage unit 10 so that a plurality of cooling water lines 30 are formed.

The membrane 40 is installed to be installed in an expandable U-shaped cross-section in the inner periphery of the refrigerant storage unit 10, and connected to the membrane 40 to the membrane 40 to expand the membrane 40 Pressurization provided with compressed air inlet 51 and compressed air outlet 52 to regulate the pressure in the refrigerant storage unit 10 by injecting or discharging pressurized fluid (air or fresh water, etc.) using a pressurizing device 53 Let the line 50 be formed. Of course, it is natural that the pressure control valves V3 and V4 should be installed in the pressure line inlet and outlet pipes, respectively.

Looking at the use form of the receiver 100 having the configuration as described above is as follows.

1. When the refrigerant is injected, the pressure of the piping (A) at the rear end of the receiver (100) of the seawater temperature difference power generation system is higher than the internal pressure of the receiver (100, more specifically, the refrigerant storage unit (10)), and only the refrigerant pump (110) If injection is not possible,

By injecting a fluid such as air or water into the compressed air inlet 51 at a higher pressure than the pressure inside the receiver 100, the volume of the membrane 40 is increased, thereby reducing the volume occupied by the refrigerant inside the receiver 100 The pressure is increased. At this time, the pressure inside the receiver 100 rises rather than the pressure of the piping (A) at the rear end of the receiver 100 of the seawater temperature difference power generation system, so that refrigerant injection into the seawater temperature difference power generation system is possible. .

2. When the refrigerant in the receiver 100 is recovered, due to the external environment such as outside temperature, the pressure inside the receiver 100 is higher than the pressure in the piping (B) of the receiver 100 of the seawater temperature difference power generation system. When recovery is not possible, the cooling water line 30 surrounding the outside of the receiver 100 circulates cooling water or deep water discharged water produced by the cooling device 60, thereby reducing the temperature and pressure inside the receiver 100. Refrigerant can be recovered, and the fluid inside the membrane 40 is discharged through the membrane 40 fluid outlet to secure an internal volume to lower the internal pressure to recover the refrigerant.

3. When transferring the refrigerant using the receiver (100) as a storage tank, the refrigerant inside the receiver (100) evaporates due to external environment such as outside air, and when the internal pressure rises, the cooling water line surrounding the receiver (100) outside The cooling water produced by the cooling device 60 is circulated through 30 to reduce the pressure inside the receiver 100 to enable stable transportation.

As described above, although the present invention has been described by a limited number of embodiments and drawings, the present invention is not limited thereto, and the technical spirit of the present invention and the following will be described by those skilled in the art to which the present invention pertains. Of course, various modifications and changes are possible within the equal scope of the claims to be described.

10: refrigerant storage unit 20: insulating layer
30: coolant line 40: membrane
50: pressurized line 51: compressed air inlet
52: compressed air outlet 53: pressurization device
60: cooling device 100: receiver
110: refrigerant pump 120: evaporator
130: turbine 140: condenser
P: Refrigerant circulation piping V: Switching valve
V1: inlet valve V2: outlet valve
V3, V4: Pressure control valve V5, V6: Supply control valve

Claims (7)

It is used in the seawater temperature difference power generation system, is installed between the evaporator 120 and the condenser 140, in the receiver 100 is injected with a refrigerant for operating the turbine 130,
The receiver 100 is
A refrigerant storage unit 10 in which refrigerant is stored therein, and through which outlet valves V1 and V2 for refrigerant circulation are installed to enable injection and recovery of refrigerant;
An insulating layer 20 formed on the outer periphery of the refrigerant storage unit 10;
A cooling water line 30 formed in a plurality of the heat insulating layers 20 so as to flow cooling water for cooling the refrigerant storage unit 10 to control the temperature of the refrigerant storage unit 10;
The refrigerant storage unit 10, the membrane 40 is installed to be installed expandably on the inner periphery;
A pressure line 50 which is connected to the membrane 40 and injects or discharges a pressurized fluid for expanding the membrane 40 to regulate the pressure in the refrigerant storage unit 10; It consists of,
It is possible to inject and recover the refrigerant inside the refrigerant storage unit (10), so it can be used as a refrigerant storage tank, and the refrigerant storage type fluid using the built-in membrane and cooling system characterized in that the temperature and pressure can be controlled inside. group.
According to claim 1,
The coolant line 30 is
In the condenser 140, a portion of the deep water used for cooling the refrigerant vapor is branched and used as cooling water, or a separate deep water that does not pass through the condenser 140 is used as cooling water. Refrigerant storage type receiver.
According to claim 1,
The coolant line 30 is
Refrigerant storage type receiver using the built-in membrane and cooling system, characterized in that the cooling device 60 for supplying cooling water is connected and used.
According to claim 1,
When the refrigerant is injected into the receiver 100,
When the pressure of the pipe (A) at the rear end of the receiver (100) of the seawater temperature difference power generation system is higher than the internal pressure of the receiver (100), and it is impossible to inject only with the refrigerant pump (110),
By injecting a pressurized fluid at a higher pressure than the pressure inside the receiver 100 through the pressurizing line 50 to increase the volume of the membrane 40, the volume occupied by the refrigerant in the receiver 100 is reduced to increase the pressure. By increasing the pressure, the pressure inside the receiver 100 rises rather than the pressure of the piping (A) at the rear end of the receiver 100 of the seawater temperature difference generation system, so that refrigerant injection into the seawater temperature difference generation system is possible. Refrigerant storage type receiver using built-in membrane and cooling system.
According to claim 1,
The receiver 100 when the refrigerant is recovered,
When the pressure inside the receiver 100 is higher than the pressure of the front pipe (B) of the receiver 100 of the seawater temperature difference power generation system, recovery of the refrigerant is impossible.
Circulating the cooling water or deep water of the cooling device 60 through the cooling water line 30 to reduce the temperature and pressure inside the receiver 100 to recover the refrigerant, or
Refrigerant storage type fluid using built-in membrane and cooling system, characterized in that the pressurized fluid in the membrane (40) is discharged to the outside to secure the internal volume of the membrane (40), thereby reducing the internal pressure to recover the refrigerant. group.
According to claim 1,
When transferring the refrigerant using the receiver 100 as a refrigerant storage tank,
When the internal pressure rises due to the evaporation of the refrigerant inside the receiver (100) due to external influences,
Refrigerant using the built-in membrane and cooling system characterized in that circulating the cooling water through the cooling water line (30) surrounding the receiver (100), reducing the pressure inside the receiver (100) to enable stable transportation. Storage type receiver.
According to claim 1,
The seawater temperature difference power generation system
A refrigerant pump 110 installed at the rear end of the receiver 100 to circulate the refrigerant as the working fluid;
An evaporator (120) for vaporizing the refrigerant supplied from the refrigerant pump (110) by heat exchange with the surface water of the ocean to vaporize the refrigerant;
A turbine 130 in which kinetic energy is converted into electricity by supplying and rotating the refrigerant vapor;
A condenser 140 circulating the refrigerant passing through the turbine 130 to heat and exchange with deep ocean water to condense to liquefy, and circulating inside the receiver 100;
Refrigerant storage type receiver using the built-in membrane and cooling system, characterized in that it comprises a.

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