WO2013098950A1

WO2013098950A1 - Ammonia absorption type cooling device utilizing solar energy or surplus energy

Info

Publication number: WO2013098950A1
Application number: PCT/JP2011/080248
Authority: WO
Inventors: 博冨安; 藤本　喜久
Original assignee: Tomiyasu Hiroshi; Fujimoto Yoshihisa
Priority date: 2011-12-27
Filing date: 2011-12-27
Publication date: 2013-07-04

Abstract

Provided is a device for producing liquid ammonia, which is storable as energy for cooling, using inexpensive energy and for enabling a cooler to be operated anytime. Either a heat carrier heated by solar energy as a heat source or an electrothermal or induction heater operated with electric power is used as a heating source to heat ammonia water and vaporize the ammonia, which is converted to liquid ammonia and then stored. When at least two liquid-ammonia tanks are installed, a concurrent operation is possible in which the liquid ammonia in one tank is used as a refrigerant for a heat exchanger and, simultaneously therewith, liquid ammonia is produced and stored in another tank. The ammonia gas having been used for cooling is absorbed into water to obtain ammonia water, which is reused as a supply material.

Description

Ammonia absorption cooling system using solar energy or surplus energy

The present invention relates to an ammonia absorption type cooling device, and relates to a device that performs air conditioning (cooling) using surplus energy such as solar energy or nighttime power. Specifically, the present invention relates to a cooling device that uses solar energy or surplus power as a heating source of a heat medium used for heating ammonia water in order to efficiently produce liquid ammonia used as a refrigerant at low cost.

Conventionally, the ammonia absorption cooling (refrigeration) method using ammonia as a refrigerant has been widely practiced, but has been neglected with the development of the vapor compression refrigeration method. However, since the 1990s, it has been attracting attention again in order to comply with regulations on the use of chlorofluorocarbons and to save energy by using waste heat. Patent Document 1 touches the structure of a cooler in an absorption refrigeration (ammonia absorption cooling) cycle on the second page of the specification, left column, lines 6 to 31; and ammonia absorption refrigeration. The device (cooling) itself is a well-known method as shown in Non-Patent Document 1.

Utility Model Registration No. 2548789

The ammonia absorption type cooling device is a system that performs cooling by heat of evaporation when ammonia liquefied by pressurization is vaporized in principle. The vaporized ammonia is absorbed by water and becomes ammonia water. When this ammonia water is heated, ammonia evaporates, but in a closed system, when the pressure in the system reaches equilibrium with the vapor pressure of liquid ammonia at that temperature due to the vapor pressure of ammonia, the ammonia liquefies. For example, ammonia gas liquefies when the vapor pressure reaches about 1.0 MPa at a temperature of about 30 ° C. The liquefied ammonia is vaporized and the cooling operation is repeated.

In the vapor compression type, it is possible to store a refrigerant compressed and liquefied, but there is a limit to vaporizing a large amount of liquid in a closed system. This is a feature of absorption cooling, and is also striking compared to other energy stores, such as electricity storage. Although it is limited to one energy use of cooling, the power consumption of air conditioning in summer is enormous, and storing energy for air conditioning leads to potential power consumption savings.

In the case of a conventional cooler using ammonia as a refrigerant, ammonia gas is compressed and liquefied and vaporized and cooled with heat of vaporization. However, when vaporized, ammonia expands and its volume increases. Therefore, in order to repeat the cycle of liquefaction → vaporization, there was a problem that ammonia gas had to be constantly pressurized with a compressor.

Therefore, the present inventors have solved the above problems and studied a method of repeating liquefaction → vaporization of ammonia without using a compressor. As a result, liquid ammonia was made using solar heat or electric power, and this liquid ammonia was vaporized. Thus, the present invention has been completed by finding that it is not necessary to use a compressor for compressing the gas by dissolving the ammonia gas discharged from the heat exchange device in water by using it as a refrigerant for the heat exchange device.

That is, the gist of the present invention is that
(Claim 1)
A conversion device that converts solar energy in which a heating tube is stored into heat energy, a heating vessel containing ammonia water, a heating device for heating ammonia water in the heating vessel, the heating tube, and the heating A closed heat medium circulation system composed of a heat medium circulation pipe connecting the heating device in the container, an evaporation tower for passing ammonia gas heated and evaporated by the heated heat medium, and a liquid ammonia storage tank for the ammonia gas An ammonia gas passage pipe, a storage tank for liquid ammonia, a heat exchange device for vaporizing the liquid ammonia to be used as a refrigerant, and a sealed ammonia gas circulation comprising a pipe connecting the container and each device An ammonia absorption cooling device comprising a system.
(Claim 2)
A heating vessel containing ammonia water, a heating device for heating the ammonia water in the heating vessel, an evaporation tower for passing heated and evaporated ammonia gas and water vapor, and a separator for separating the water vapor and the ammonia gas A water tank for storing the water separated by the separator, an ammonia gas passage pipe for guiding the ammonia gas to the liquid ammonia storage tank, a storage tank for liquid ammonia, and heat for vaporizing the liquid ammonia to be used as a refrigerant A sealed ammonia gas circulation system composed of an exchange device, a mixer that absorbs ammonia gas used in the heat exchange device and recovers the ammonia gas, and a pipe connecting the container and each device An ammonia absorption cooling device characterized by comprising:

Describing the above invention, the invention described in claim 1 is composed of a hermetically sealed heating heat medium circulation system group and an ammonia gas circulation system group, and the heating medium circulation system group is a heating medium. A device group for evaporating ammonia water by a converter, which converts solar energy in which a heating tube is accommodated into heat energy, a heating medium containing ammonia water as a heating medium heated by the converter device It consists of a circulation pipe that leads to a heating device for heating the ammonia water inside, and a circulation pipe that returns the heating medium to the solar energy conversion device after the ammonia water in the heating vessel is evaporated.

The ammonia circulation system group consists of a heating vessel, an evaporation tower, a liquid ammonium storage tank, and a heat exchange device. That is, the heated and evaporated ammonia gas enters the evaporation tower, the ammonia gas is liquefied by the vapor pressure of the ammonia itself, stored in a liquid ammonia storage tank, vaporized and used as a refrigerant for the heat exchange device, and then recovered ammonia gas It is an ammonia absorption cooling device using liquid ammonia, characterized in that water is absorbed in water.

Further, the invention described in claim 2 is different from the invention of claim 1 in the heating device for heating ammonia water, and does not use solar energy and mainly uses an electric heater or an IH heater using electric power as a heat source. This is an invention relating to an ammonia absorption cooling device. Further, the invention is almost the same as the invention of claim 1 except that a separator for separating a mixed gas of heated and evaporated water vapor and ammonia gas is provided.

According to the present invention, since solar energy is used as a heat source, thermal energy is free, and even when using electric power, it is possible to use surplus electric power at night so that liquid ammonia can be produced at low cost. The obtained liquid ammonia can be used as a refrigerant for the heat exchange device. Moreover, since consumption and storage of storing liquid ammonia can be performed simultaneously while cooling using stored liquid ammonia, a cooling operation can be performed as needed.

Schematic which shows the ammonia absorption type cooling device using the solar energy of this invention. Schematic which shows the ammonia absorption cooling device using the IH heater of this invention.

Hereinafter, the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing an outline of an ammonia absorption cooling device using solar energy. 1 is a solar energy conversion device that absorbs solar heat into a heat medium, and consists of a heating tube filled with a heat medium to be heated and a box for storing them or a plate-like object on which they are placed. . In other words, the solar energy conversion device is a device that converts solar energy into thermal energy. The storage box or the plate to be placed is preferably inclined so as to be easily exposed to sunlight.

The heating tube is supplied with a heating medium from one end, and the heated heating medium is led from the other end through the circulation pipe 2 to the heating vessel 6 containing ammonia water. Each heating tube is a unit, and is connected to a supply tube for supplying the heat medium returned from the heating container. The other end is connected to an outflow pipe through which the heat medium is sent, and this is connected to the circulation pipe 2.

A method of heating a plurality of heating tubes in a line is preferable. One end of each heating pipe is connected to one outflow pipe of the heat medium, and both ends of the outflow pipe are closed, and the heat pipe heated around the intermediate portion is connected to the circulation pipe 2 that sends out the heating medium to the heating container 6. It is connected. The other end of each heating pipe is also connected to one heating medium supply pipe, and both ends of this supply pipe are closed, and a circulation pipe through which the heating medium returned from the heating container 6 flows in the middle part. 3 is connected. That is, both ends of the heating tube are an inlet side and an outlet side of the heating medium. Moreover, the method of putting a heat medium in a storage box without using a heating tube, heating with a solar heat, and circulating the heated heat medium with a pump is also employable.

It is preferable that all wavelength regions of sunlight can be absorbed in order to transfer solar energy to the heat medium with high efficiency. Any material can be used as long as the heating tube has a heat resistance of about 300 ° C., but a glass tube is preferably used. The heating tube is preferably transparent on the surface through which light passes and black on the other surface so that it can easily absorb solar heat. It is preferable to place a reflector on the back of the heating tube so as not to miss light outside the heating tube (between the tubes).

Since the ammonia absorption cooling device of the present invention requires a heat source of around 150 ° C., a high boiling point solvent is used as a heating medium for transporting heat. Any solvent having a boiling point of 150 ° C. or higher can be used, but silicon oil, ethylene glycol and the like can be preferably used. Although the solvent is colorless and transparent, carbon or the like can be dispersed in the solvent, and light can be directly absorbed by the solvent.

The number of heating tubes to be used may be determined by the amount of heat necessary for the evaporation of ammonia water in the heating vessel. The heated heat medium flows through the circulation pipe, enters the heating container, evaporates the ammonia water, and returns to the solar energy conversion device 1. In order to prevent deterioration of the heat medium, the system through which the heat medium flows is preferably sealed.

The heat medium is supplied by suctioning the inside of the system such as the heating pipe, the outflow pipe, the circulation pipe, and the supply pipe with a vacuum pump (not shown) to evacuate the oil as the heat medium from the heat medium inlet 5. Import into the system. Considering the thermal expansion of oil due to heating, the amount of oil is preferably 80 to 90% of the volume in the system. Oil that has been heated in the heating pipe and whose temperature has risen causes natural convection to flow from the outflow pipe to the circulation pipe, but it is preferable to install a pump somewhere in the circulation pipe path to actively circulate the oil. . The installation place of the pump (indicated by P in FIG. 1) is preferably installed somewhere in the circulation pipe 3 for returning the heat medium where the temperature of the heat medium is lowered. Further, if the gas reservoir 4 is provided at the corner of the circulation pipe 2 passage on the heat medium outlet side, the flow of the heat medium can be performed smoothly.

The heating vessel 6 contains ammonia water 7, which is heated by the heat medium sent through the circulation pipe 2 to evaporate the ammonia water. Ammonia water having a concentration of 20% or more, preferably 20 to 30% is used. An ammonia water concentration of 20% or less is not preferable because the amount of ammonia that evaporates is small. Usually, since the concentration of commercially available ammonia water is about 30%, it is preferable to use ammonia water having a concentration of about 30%. However, in the case of ammonia water having a high concentration exceeding 30%, the amount of ammonia to be evaporated increases, which is preferable. Therefore, the concentration of ammonia water is not limited to 30% or less.

The material of the circulating pipe through which the heat medium flows is heat resistant and is preferably not easily damaged. For example, a stainless steel pipe is preferable. A circulation pipe for heating the ammonia water is installed in the heating container. The ammonia water in the heating container is heated by the heat medium and evaporates. At this time, since a considerably high vapor pressure is generated, it is necessary to use a pressure-resistant container. Therefore, the heating container needs to have a pressure resistance and be made of a material that is not corroded by ammonia. For example, stainless steel is preferable.

After the inside of the heating container is evacuated by a vacuum pump (not shown), ammonia water is supplied from the ammonia water inlet 8 to the heating container. The supply amount is preferably about 1/2 to 2/3 of the capacity of the heating container. If the amount of ammonia water is small, the amount of ammonia that evaporates decreases, which is not preferable. If too much ammonia water is added, the ammonia water may be pushed up to the evaporation tower 9 due to the pressure applied in the container.

Evaporated ammonia and water vapor enter the evaporating tower 9, but it is considered that only ammonia gas is actually used. This is heated to a temperature of about 150 ° C., and the vapor pressure of the evaporated ammonia gas is 1.5 MPa (about 15 atmospheres). This is because it is thought that it hardly occurs.

The diameter of the pipe 10, which is a passage leading from the evaporation tower 9 to the liquid ammonia storage tanks 11, 11 ', is smaller than the diameter of the evaporation tower. Thus, the ammonia gas is further pressurized while flowing through the pipe 10, and the ammonia gas is liquefied due to self-pressure and stored in the storage tanks 11, 11 '. It is preferable to provide at least two storage tanks 11. When one is full, the valve can be switched and stored in another tank. By using two liquid ammonia storage tanks, liquid ammonia can be stored in another tank while the liquid ammonia in the full tank is vaporized and used as a refrigerant for the heat exchange device.

In this way, storing liquid ammonia in a storage tank and using it as a refrigerant at any time means that energy for cooling can be stored, and cheap solar energy can be used as a heat source for evaporation of ammonia water, or surplus power Can be cited as the greatest feature of the present invention.

When the lower valve of the liquid ammonia storage tank 11 (or 11 ') is opened, the refrigerant flows out to the pipe 12 which is a passage to the heat exchange apparatus, and is guided to the pipe 13 in the heat exchange apparatus. The diameter of the pipe 12 is smaller than the diameter of the pipe at the outlet of the liquid ammonia storage tank, and is set smaller than the diameter of the pipe 13 in the heat exchange device. As a result, the liquid ammonia is vaporized in the piping in the heat exchange device, and heat is exchanged with the outside air due to the removal of the heat of vaporization, thereby producing a cooling action. It is preferable to provide a cooling auxiliary tank 14 in the middle of the passage of the pipe 13 or in the vicinity of the outlet. The cooling effect can be enhanced by retaining the cooling gas for a short time in the cooling auxiliary tank.

The ammonia gas used for cooling in the heat exchange device is guided to the mixer 15 containing water 16 and dissolved in the water in the mixer. When the ammonia gas is dissolved in water, the pressure in the mixer is lowered, the ammonia gas is sucked, and smoothly flows through the pipe of the heat exchange device without applying pressure, and the cooling action is continued.

The ammonia water 16 in the mixer in which the ammonia gas is dissolved is returned to the heating container 6 and used as an ammonia supply source. Moreover, without putting water into the mixer, the ammonia gas returned from the heat exchange device can be led to the heating vessel as it is, and the ammonia water in the heating vessel can be absorbed by the ammonia water. In this case, the ammonia evaporates and the concentration of the ammonia water that has fallen is increased, so that it is used as an ammonia supply source.

Thus, the apparatus for carrying out the present invention is composed of a system in which all of the heat medium circulation system and the ammonia gas circulation system are sealed and evacuated.

Here, when ammonia water in the heating vessel was evaporated using a heating medium heated by solar energy, an experiment was conducted to investigate the relationship between the temperature of the heating medium and the pressure in the heating vessel. The room temperature was 16 to 17 ° C., the capacity of the heating vessel was 4 L, and 2.5 kg of about 30% ammonia water was added thereto, and the heating medium was heated to 125 ° C. The results are shown in Table 1.

¡A temperature sensor was installed at the top of the liquid ammonia storage tank. The temperature of the sensor became almost constant at 21-22 ° C. As the temperature of the heating medium increased, the pressure in the heating vessel increased as shown above. Since the vapor pressure of liquid ammonia is 0.78 MPa at 17 ° C., it can be rationally explained that the pressure in the heating vessel is almost in equilibrium with the liquefaction pressure of ammonia.

When the upper part of the liquid ammonia storage tank was cooled by a fan and the sensor temperature was set to 20 ° C., the pressure in the heating container at 130 ° C. slightly decreased to 0.75 MPa. Further, when the sensor temperature was 16 ° C., the pressure in the heating container at 130 ° C. was 0.71 MPa. From the above results, it was found that when the upper part of the liquid ammonia storage tank was cooled, the ammonia condensation temperature was lowered and the pressure in the heating vessel in equilibrium with it was also lowered.

When the heating container was heated for a long time (about 10 hours), ammonia in the ammonia water evaporated in the heating container, the concentration decreased, and the pressure decreased. That is, initially, the pressure in the heating container was 0.72 MPa at 135 ° C. (sensor temperature 16 ° C.), but after several hours it was 0.73 MPa at 140 ° C. (sensor temperature 16 ° C.). Further, with the passage of time, the pressure in the heating container is 0.68 MPa at a heating medium temperature of 145 ° C. (sensor temperature 16 ° C.), and the pressure in the heating container is 0 at a heating medium temperature of 150 ° C. (sensor temperature 16 ° C.). .70 MPa. That is, it was found that the temperature of the heating container must be increased from 135 ° C. to 150 ° C. in order to maintain the pressure in the heating container at 0.68 to 0.73 MPa.

From the above, it was found that it is preferable to operate the heating medium at a temperature of about 150 ° C. in order to carry out the present invention.

Next, the invention described in claim 2 will be described with reference to FIG. The difference between the invention described in claim 2 and the invention described in claim 1 is that the method of heating ammonia water is different. The invention described in claim 1 uses a heat medium heated by solar energy as a heat source, whereas the invention described in claim 2 uses electric power. Further, the steps of evaporation of ammonia → storage of liquid ammonia → liquid ammonia vaporization → heat exchange device → recovery of ammonia gas and the like are almost the same as the invention of claim 1 except that a separator is provided in the middle. Only the differences will be described here.

A method of using an IH heater 17 although an electric heating apparatus using a nichrome wire for heating the ammonia water 7 in the heating container 6 using electric power as an energy source, for example, a sheathed heater can be put into ammonia water and heated. Can be preferably used. One of the most efficient ways to convert power into heat is an IH heater. Further, the advantage of the IH heater is that temperature control is easy, so that the heating temperature can be kept below the set temperature even in the home IH heater. As power as an energy source, it is possible to use inexpensive nighttime surplus power. Similar to the first aspect of the invention, the concentration of the ammonia water to be used is preferably 20 to 30%, and the amount of the ammonia water to be added is preferably about 1/2 to 2/3 of the capacity of the heating vessel.

It is preferable to heat the ammonia water at a temperature of 130 to 200 ° C. The entire heating container is made of SUS430. SUS430 is preferable because it is heated by an IH heater. A temperature sensor is attached to the heating container to control the temperature of the IH heater. By making the entire heating container with SUS430, the entire area around the heating container is heated, and ammonia water can be efficiently evaporated.

The length of the evaporation tower 9 is slightly shorter than that of the apparatus according to the first aspect of the present invention. This is because the heating temperature is set higher than that of the invention described in claim 1 and the vapor to be evaporated contains ammonia and a small amount of water vapor. This is because there is no problem even if water vapor is contained in the coming steam.

The mixed vapor guided to the separator 18 is separated into ammonia gas and water vapor at the upper part, and the ammonia gas is liquefied while passing through the ammonia gas passage pipe 10 and stored in the liquid ammonia storage tank. The water vapor is condensed and stored in the water collection tank 19. The water stored in the collection tank is sent to the mixer 15 and used to absorb the ammonia gas returned from the heat exchange device. Subsequent steps are the same as those of the first aspect of the present invention.

When the temperature of the mixed steam of ammonia and water coming out of the evaporation tower 9 is high, it is difficult for the ammonia to condense. Therefore, air is sent with a fan or the like to cool the outside air temperature to about 30 ° C., and the ammonia gas passage 10 is cooled. Is good.

Next, an example of an experiment using an IH heater is shown. The entire heating container for IH heater was made of SUS430. A temperature sensor is attached to the heating container. The capacity of the heating container was 10 L, and 150 g of 30% ammonia water was placed in the heating container. Table 2 shows the relationship between the sensor temperature and the pressure in the heating container. When the IH heater is used, the temperature of the entire heating container rises, and it has been found that the efficiency of ammonia vapor generation is very good.

The pressure increased with the temperature rise, but after that, the temperature rose but the pressure became almost constant. This is considered to be due to a decrease in the ammonia concentration in the container due to the evaporation of ammonia. Above 144 ° C., the pressure decreased with increasing temperature as shown in Table 3.

Since the saturated vapor pressure of water at 180 ° C. is 1.05 MPa, it can be seen that the vapor density of ammonia is low. Conversely, it means that a large amount of water vapor is mixed into ammonia. As described above, although there is a considerable difference between the heating temperature and the pressure level in the heating container in the contents described in the experiment of the invention according to claim 1, in the case of the invention according to claim 1, all the vapor to be evaporated is present. In contrast to ammonia, in the case of an IH heater, it is a vapor mixture of ammonia and water vapor that evaporates, and the vapor pressure of water vapor is added, resulting in a large value.

Hereinafter, the present invention will be specifically described with reference to examples.

Example 1
An apparatus as shown in FIG. 1 was used. A glass tube having an inner diameter of about 10 cm and a length of about 2 m was used as one unit. In this example, one glass tube was used. About 8 L of ethylene glycol having a boiling point of 197.3 ° C. was used as a heating medium. The total capacity of the heat medium circulation pipe and the glass tube was about 9L. After the air in the heat medium circulation path was removed with a vacuum pump, ethylene glycol was introduced into the system from the heat medium inlet. The glass tube containing ethylene glycol was exposed to direct sunlight in mid-February, but it was about 13 ° C at first, but rose to about 160 ° C after 8 hours.

Heating vessel, evaporating tower, liquid ammonia storage tank, piping in heat exchanger, containers such as mixer, etc. and the air in the piping are sucked with a vacuum pump and the path is evacuated, then the ammonia water inlet 3.0 kg of about 30% ammonia water was added. The capacity of the stainless steel heating container was 4L. The circulation pipe of the heat medium is installed toward the bottom of the heating container and is completely immersed in the ammonia water. The aqueous ammonia was heated by ethylene glycol heated to about 150 ° C., and the ammonia evaporated. The evaporation tower used was a stainless steel pipe having a length of 120 cm and an inner diameter of 20 mm.

The vapor pressure of the gas in the evaporation tower was 1.5 MPa. Since the vapor pressure of water at this temperature was approximately 0.5 MPa, it was considered that the vaporized vapor contained no water vapor but only ammonia gas.

When the ammonia gas was led to a 10-liter liquid ammonia storage tank through an 8 mm diameter stainless steel ammonia passage pipe, liquid ammonia was generated and stored in the tank. When the valve under the storage tank was opened and ammonia gas was allowed to flow through the piping in the heat exchange device, the piping temperature in the storage tank and the heat exchange device dropped rapidly and a cooling effect was exhibited.

アンモニア Ammonia gas that passed through the piping in the heat exchanger was guided to a mixer containing water and absorbed in water. The ammonia water that absorbed the ammonia gas in the mixer was returned to the heating vessel and reused as ammonia water. Since ammonia gas is absorbed by water, the pressure in the mixer decreases. For this reason, the gas in the heat exchanger piping continuously flows, so that the cooler could be operated continuously.

(Example 2)
The apparatus shown in FIG. 2 was used. In the same manner as in Example 1, the inside of the system was evacuated by a vacuum pump, and then 3.0 kg of ammonia water having a concentration of about 30% was supplied to a 10 L heating vessel. The entire heating container was made of SUS430 and a temperature sensor was attached. As the IH heater, MR-20DE made by Toshiba was used. The IH heater was installed on the lower surface of the heating container, and the heating temperature was set to high to medium.

The length of the evaporation tower was 60 cm and the inner diameter was 20 mm. The evaporated steam contained water vapor in addition to ammonia gas. This mixed vapor was led to a separator and separated into ammonia gas and water. The water condensed at the bottom was stored in a water collection tank. The accumulated water was sent to the mixer. The separated ammonia gas was sent from the top of the separator to a liquid ammonia storage tank. Thereafter, when the same operation as in Example 1 was performed, the cooler could be continuously operated.

As described above, according to the present invention, since solar energy is used as a heat source, thermal energy is free, and even when using electric power, night surplus power can be used, so liquid ammonia can be used at low cost. Can be manufactured and stored. The resulting liquid ammonia becomes stored energy that can be used for cooling. In the present invention, since liquid ammonia is stored while being cooled using the stored liquid ammonia, it can be consumed and stored at the same time, so that the cooling operation can be carried out at any time, which has a great effect on energy saving. There is.

1 …… Solar energy converter 2 …… Circulation pipe (heat medium exit side)
3 ...... Circulation pipe (heating medium return side)
4 …… Gas pool 5 …… Heat medium inlet 6 …… Heating vessel 7 …… Ammonia water 8 …… Ammonia water inlet 9 …… Evaporation tower 10 …… Ammonia

gas passage pipe

11, 11 ′ Liquid ammonia storage Tank 12 ... Refrigerant passage to heat exchanger 13 ... Pipe in heat exchanger 14 ... Cooling auxiliary tank 15 ... Mixer 16 ... Water (ammonia water)
17 …… IH heater 18 …… Separator 19 …… Water collection tank

Claims

A conversion device that converts solar energy in which a heating tube is stored into heat energy, a heating vessel containing ammonia water, a heating device for heating ammonia water in the heating vessel, the heating tube, and the heating A closed heat medium circulation system composed of a heat medium circulation pipe connecting the heating device in the container, an evaporation tower for passing ammonia gas heated and evaporated by the heated heat medium, and a liquid ammonia storage tank for the ammonia gas An ammonia gas passage pipe, a storage tank for liquid ammonia, a heat exchange device for vaporizing the liquid ammonia to be used as a refrigerant, and a sealed ammonia gas circulation comprising a pipe connecting the container and each device An ammonia absorption cooling device comprising a system.
A heating vessel containing ammonia water, a heating device for heating the ammonia water in the heating vessel, an evaporation tower through which heated and evaporated ammonia gas and water vapor pass, and a separator for separating the water vapor and the ammonia gas A water tank for storing the water separated by the separator, an ammonia gas passage pipe for guiding the ammonia gas to a liquid ammonia storage tank, a storage tank for liquid ammonia, and heat that vaporizes the liquid ammonia to serve as a refrigerant A sealed ammonia gas circulation system composed of an exchange device, a mixer that absorbs ammonia gas used in the heat exchange device and recovers ammonia gas, and a pipe that connects the container and each device An ammonia absorption cooling device characterized by comprising: