JPS62153661A - Heat accumulation system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a heat storage system that can be used for cooling and heating buildings, etc., and for cooling and heating industrial plants.

(Prior Art) The present applicant previously proposed a can heating system shown in FIGS. 4 to 6. (Japanese Patent Application No. 6O-260633) In Fig. 4, 1 is a concentrated liquid heat exchanger for exchanging heat with a concentrated liquid containing many high boiling point components, such as LiRr/It□O system, and 2 is a low temperature liquid of the same type as the concentrated liquid. Internal structure of dilute liquid heat exchanger for heat exchange of dilute liquid containing only boiling point components or a large proportion thereof 7. Storing concentrated liquid
; In the liquid tank, concentrated liquid heat exchanger 1 and 7 counterfeit liquid 9 can be circulated 11
It is connected to H. Reference numeral 4 denotes a redundant liquid tank for storing a dilute liquid, in which the dilute liquid heat exchanger H2 and the dilute liquid 1O are connected so that they can be circulated, and the /rich liquid heat exchanger 1 and these) layer liquid or dilute liquid vapor 1 are connected.
1 are connected to each other so that they can flow together. 5 is a cooling tower,
A concentrated liquid heat exchanger 1 and a cooling medium 12 such as cooling water are connected to each other so that they can circulate. 21 is a heat source, and the dilute liquid heat exchanger 2 and the heat medium 22 are connected so that they can circulate. 7 is a heat load such as a fan coil, in which the dilute liquid heat exchanger 2 and the cold water 14 for cooling are connected so as to be able to circulate, and the concentrated liquid heat exchanger 1 and the hot water 20 for heating are connected.
are connected in a circular manner. Reference numeral 8 denotes a cooling tower, in which the dilute liquid heat exchanger 2 and a cooling medium 15 such as cooling water are connected so as to be able to circulate therein. 16 is a condenser disposed within the concentrated liquid heat exchanger l;
17 is an evaporator arranged in the dilute heat exchanger 2, 18 is a refrigerant compressor, and 19 is an expansion valve. The condenser 16, expansion valve 19, evaporator 17, and refrigerant compressor 18 are connected to refrigerant piping in this order. A heat pump is constructed by connecting the two to form a closed circuit.

During cold storage operation, the concentrated liquid 9 is circulated between the concentrated liquid heat exchanger 1 and the concentrated liquid tank 3, and at the same time, the diluted liquid 10 is circulated between the diluted liquid heat exchanger 2 and the diluted liquid tank 4, And dilute liquid heat exchange′
The cooling medium 15 is circulated between J″i2 and the cooling tower 8. When the refrigerant compression a18 is driven in this state, the refrigerant compression a
The high temperature and high pressure refrigerant gas discharged from 1g is sent to the condenser 16.
Flows into the water and heats the water there, causing it to condense and liquefy. Next, this refrigerant liquid undergoes adiabatic expansion as it flows through the expansion valve 19, and then enters the evaporator 17, where it evaporates and vaporizes by cooling the dilute liquid 10. Then, the refrigerant gas that flows out is sucked into the refrigerant compressor 18 and compressed again.

Thus, the concentrated liquid passes through the condenser 16 in the concentrated liquid heat exchanger 1.
As a result, a part of it is evaporated and concentrated by being heated by B2 in FIG.
During this time, under pressure P, its concentration becomes X,
+ becomes Xo, and the temperature becomes T5. and concentration X
B! , temperature T! Stored in Me 1 & Tank 3 in state 11, 95? Steam 11 evaporated from Pi flows into the dilute heat exchanger 2.

On the other hand, the diluted liquid is cooled by the cooling medium 15 and the evaporator 17 in the diluted liquid heat exchanger 2, and at the same time absorbs the vapor evaporated from the concentrated liquid and is diluted.
During this period, the concentration changes from XAI to XA2 under the pressure P, and the temperature changes to T and l.
becomes. Then, the concentration XA□ and the temperature T. It is stored in the diluted liquid tank 4 in this state. In FIG. 5, the density order is Xhz<XAI<XBI<X12.

During cooling operation, the cooling water 14 is circulated between the dilute liquid heat exchanger 2 and the heat load 7, and dilute liquid heat exchange is performed! ? ! Circulating the dilute liquid 10 between the container 2 and the dilute liquid tank 4, and simultaneously circulating the cooling medium 12 between the concentrated liquid heat exchanger l and the cooling tower 5,
Moreover, the concentrated liquid 9 is circulated between the concentrated liquid heat exchanger 1 and the concentrated liquid tank 3.

In this way, the diluted liquid is heated by removing heat from the cold water 14 for cooling, and a part of the liquid is evaporated and concentrated. At that time, the dilute liquid shifts from the state 8 in Figure 5 to the state A4, and its concentration changes from XAz to XAI under the pressure PL.
The temperature becomes T. Then, a diluted liquid having a concentration xa+ and fJL degree Tc is stored in the diluted liquid tank 4, and vapor 11 evaporated from the diluted liquid flows into the concentrated liquid exchanger 1. On the other hand, the concentrated liquid is cooled by the cooling medium 12 and at the same time is diluted by absorbing the vapor 11 evaporated from the diluted liquid. At that time, the concentrated liquid is B in Figure 5,
Transitioning from state to state B, the concentration changes from Xo to X□ under pressure P5, the temperature becomes Tti, and in this state ? Two liquids are stored in the fM liquid tank 3. Thereafter, cooling is performed by intermittently and alternately repeating the above-mentioned cold storage operation and cooling operation.

During heat storage operation, the concentrated liquid is circulated between the concentrated liquid heat exchanger 1 and the concentrated liquid tank 3, and the diluted liquid is circulated between the diluted liquid heat exchanger 2 and the diluted liquid tank 4. Then, the cooling medium 15 is circulated between the dilute heat exchanger 2 and the cooling tower 8, and the refrigerant compressor 18 is driven to circulate the refrigerant to the condenser 16 and evaporator 17. Then, the concentrated liquid is heated by the condenser 16 and a part of it suddenly explodes. Due to agricultural contraction, the state 81' in FIG. 6 shifts to the state Ill', and the concentration becomes X! under the pressure PL'. The temperature changes from lI' to XIIZ' and becomes T33.
．． becomes. On the other hand, the dilute liquid is cooled by the cooling medium 15 and the generator 17, and at the same time absorbs the vapor 11 emitted from the concentrated liquid and is diluted.
Under the pressure PL', the concentration changes from X,1' to XA2', and the temperature becomes I2.

During heating operation, (the concentrated liquid is circulated between the concentrated liquid heat exchanger 1 and 7; the liquid tank 3, and the diluted liquid is circulated between the diluted liquid heat exchanger 2 and the diluted liquid tank 4). . And heat load 7 and lI2
Hot water 20 for heating is circulated between the liquid heat exchanger 1 and a heat source 22 is circulated between the heat source 21 and the dilute liquid heat exchanger 2.

Thus, the dilute liquid is heated by the heat source 22 and some of it evaporates. 14 m, the state changes from the state ^, ゛ in Fig. 6 to the state ^4', and the pressure P. The concentrated liquid changes from XA2'' to XAI' under
The state 83' in FIG. 6 shifts to the Ba' state, and under the pressure P9', its concentration changes from X1,2 to X11', and the temperature becomes TN. In addition, in Figure 6, the 4th rank is
A! '<Xa+''<Xa+''X.

′.

(Problems to be Solved by the Invention) In the heat generation system described above, during cold storage operation, the t-concentration of the concentrated liquid 9 flowing into the liquid heat exchanger 2Sl is low, so the evaporation of the γ concentrated liquid can be regenerated with a constant amount of heat source. Quantity is small. In addition, during cooling operation, the temperature of the concentrated liquid flowing into the liquid heat exchanger 2' is high, so more heat is transferred to the cooling medium 12, and the cooling tower 5
capacity increases.

Furthermore, since the temperature of the concentrated liquid 9 flowing into the concentrated liquid heat exchanger l during heating operation is lower than the temperature required for heating, it is necessary to raise the temperature of the concentrated liquid 9, and as a result, a large amount of steam 11 evaporated from the dilute liquid is generated. There was a problem of consumption.

(Means for Solving the Problems) The present invention was invented in order to solve the above problems, and its gist is that a concentrated liquid tank that stores a concentrated liquid containing many high boiling point components. A dilute liquid heat exchanger that is connected so that the concentrated liquid can be circulated and a dilute liquid heat exchanger that is connected so that the dilute liquid can be circulated to a dilute liquid tank that stores a dilute liquid that contains many low boiling point components m! '
S and S are connected so that the generated steam can mutually flow, and when the concentrated liquid is heated in the above-mentioned high-concentration heat exchanger, a part of it is exchanged, thereby concentrating the concentrated liquid and simultaneously converting it into the above-mentioned dilute liquid heat exchanger. The diluted liquid is cooled in the diluted liquid heat exchanger and the vapor generated from the concentrated liquid is absorbed to dilute it. In a heat storage system that dilutes the concentrated liquid by simultaneously cooling the concentrated liquid in the concentrated liquid heat exchanger and absorbing vapor exchanged from the diluted liquid, the concentrated liquid tank and the CV & heat exchanger are connected. A storage tank characterized in that a heat exchanger is disposed in the three liquid circulation lines between the three liquid circulation lines for exchanging heat between the seven liquids heading for the concentrated liquid tank and the concentrated liquid heading for the seven eyebrow liquid heat exchangers. It's in the he system.

(Function) The present invention exchanges heat between the I-Mizunami heading towards the agricultural liquid tank and the I-Mizunami heading towards the heat exchanger in the heat exchanger, so that it flows into the concentrated liquid heat exchanger during cooling operation.
; The temperature of the liquid can be lowered to a required temperature, and the temperature of the concentrated liquid flowing into the concentrated liquid heat exchanger can be raised to the required temperature during cold storage operation and heating operation.

Embodiment One embodiment of the invention is shown in FIGS. 1-3. As shown in Figure 1, the concentrated liquid tank 3 and the concentrated liquid heat exchanger l
A heat exchanger 31 for exchanging heat between the concentrated liquid 9b directed to the concentrated liquid heat exchanger 1 and the concentrated liquid 9b directed to the concentrated liquid heat exchanger 1 is disposed in the concentrated liquid circulation line 30 between the The rest of the structure is the same as the conventional one shown in the third space, and corresponding members are given the same reference numerals.

During cold storage operation, Y Mizunae exchanger L and 1 are used as in the conventional one.
The concentrated liquid is circulated between the diluted liquid heat exchanger 2 and the @liquid tank 4 at the same time as the concentrated liquid is circulated between the diluted liquid heat exchanger 2 and the cooling tower 8. A cooling medium 15 is circulated in between. Then, the refrigerant compressor 18 is driven and the condenser 1
In step 6, the refrigerant is condensed and liquefied, and at the same time, in an evaporator 17, the refrigerant is evaporated and vaporized. Then, in the heat exchanger 31, the concentrated liquid 9a goes to the liquid tank 3, and the concentrated liquid 9a goes to the concentrated liquid heat exchanger l.
The concentrated liquid 9b exchanges heat with the concentrated liquid 9b and flows into the concentrated liquid heat exchanger l.
The temperature is the concentrated liquid temperature Tt during cooling operation as shown in Figure 2.
= Increase the temperature by T1 from '. Thus, the evaporation Ill that can be regenerated with a constant amount of heat source is increased.

During cooling operation, the concentrated liquid is circulated between the concentrated liquid heat exchanger 1 and the concentrated liquid tank 3, and at the same time, the diluted liquid is circulated between the diluted liquid heat exchanger 2 and the diluted liquid tank 4, as in the conventional system. . Then, the cooling water 14 is circulated between the dilute liquid heat exchanger and the heat load 7, and the cooling medium 12 is circulated between the concentrated liquid heat exchanger 1 and the cooling tower 5. Then, the concentrated liquid 9b going to the concentrated liquid heat exchanger 1 in the heat exchanger 31 is transferred to the concentrated liquid tank 3?
It is cooled by heat exchange with &, 9 b, and as shown in FIG. 2, the temperature is lowered by Ah than the concentrated liquid temperature T and H during the cold storage operation. In this way, less heat is lost to the cooling medium 12, so the capacity of the cooling tower 5 can be reduced.

During heating operation, concentrated liquid is circulated between the concentrated liquid heat exchanger 1 and the concentrated liquid tank 3, and diluted liquid is circulated between the diluted liquid heat exchanger 2 and the diluted liquid tank 4, as in the conventional case. Then, hot water 20 for heating is circulated between the concentrated liquid heat exchanger 1 and the heat load 7, and the heat '
The heat medium 22 is placed in a W1 ring between IfJ21 and the dilute liquid heat exchanger 2. Then, the concentrated liquid 9b flowing into the concentrated liquid heat exchanger 1 is heated by the heat exchanger 31, and as shown in FIG. Since the temperature of the concentrated liquid approaches the temperature of the concentrated liquid T, less steam is consumed for raising the temperature. In addition, in FIG. 2, PLL is the internal pressure of heat exchanger 1.2 during cooling operation, T. '' is the dilute liquid temperature during cooling operation, X@1 is the equilibrium concentration determined by T.' and PLL, In FIG. 3, To is the concentrated liquid temperature during heating operation, and the rest is the same as in FIG. 6.

(Effects of the Invention) In the present invention, a concentrated liquid heat exchanger is connected to a concentrated liquid tank that stores a concentrated liquid containing many high boiling point components so that the concentrated liquid can be circulated, and a dilute liquid containing many low boiling point components is stored. A dilute liquid heat exchanger connected to the dilute liquid tank so that the dilute liquid can be circulated is connected so that the generated steam can mutually flow, and when the concentrated liquid is heated in the concentrated liquid heat exchanger, a part of it is heated. Concentrating the concentrated liquid by evaporation, and simultaneously cooling the diluted liquid in the diluted liquid heat exchanger and diluting it by absorbing the vapor evaporated from the concentrated liquid,
When the diluted liquid is heated in the diluted liquid heat exchanger, a part of it is evaporated, thereby converting the diluted liquid into t! In the m-thermal system, the concentrated liquid is diluted by simultaneously cooling the concentrated liquid in the concentrated liquid heat exchanger and absorbing vapor evaporated from the diluted liquid. The concentrated liquid circulation line between the fI tank and the concentrated liquid heat exchanger is connected to the 21 which goes to the 7 agricultural liquid tanks.
A heat exchanger is installed to exchange heat between the % liquid and the concentrated liquid flowing into the concentrated liquid heat exchanger.During cooling operation, the temperature of the concentrated liquid flowing into the concentrated liquid heat exchanger can be lowered. The amount of heat dissipated into the cooling medium for cooling the cooling medium can be reduced, and the capacity of the cooling tower for cooling this cooling medium can be reduced. In addition, during cold storage operation or heating operation, the temperature of the concentrated liquid flowing into the concentrated liquid heat exchanger can be increased, increasing the amount of vapor evaporated from the concentrated liquid or diluted liquid, increasing cooling dilution and heating concentration capabilities. can be increased.

[Brief explanation of drawings]

4 to 3 show one embodiment of the present invention, FIG. 1 is a system diagram, FIG. 2 is a Duering diagram during cold storage/cooling operation, and FIG. 3 is a Duering diagram during heat storage/heating operation. It is a diagram. Figures 4 to 6 show an example of a conventional heat storage system, with Figure 4 being a system diagram, Figure 5 being a Duering diagram during cold storage/cooling operation, and Figure 61! 1 is a Duering diagram during heat storage/heating operation. Concentrated liquid heat exchanger - 1, Dilute liquid heat exchanger -2, Concentrated liquid tank -3, Dilute liquid tank...4, Cooling tower...5.8, Heat source -21, Heat load -7, Dilute liquid...10, Cooling medium -12,15, Heat medium -22, Cold water for air conditioning...1
4, Expansion valve...'19, Hot water for heating...20, Concentrated v&, VIi ring line--30, Heat exchanger...31
, Concentrated liquid heading to the concentrated liquid tank -98, Concentrated liquid heading to the concentrated liquid heat exchanger -9b Figure 1 Figure 2 Figure 3 Factor 4

Claims (1)

[Claims] A concentrated liquid heat exchanger is connected to a concentrated liquid tank that stores a concentrated liquid containing many high-boiling point components so that the concentrated liquid can be circulated, and the diluted liquid can be circulated to a dilute liquid tank that stores a dilute liquid that contains many low-boiling point components. and a dilute liquid heat exchanger connected to the said concentrated liquid heat exchanger so that the generated steam can mutually flow, and when the concentrated liquid is heated in the concentrated liquid heat exchanger, a part of it is evaporated, thereby concentrating the concentrated liquid at the same time. By cooling the dilute liquid in the dilute liquid heat exchanger and absorbing the vapor evaporated from the concentrated liquid, the dilute liquid is diluted, and when the dilute liquid is heated in the dilute liquid heat exchanger, a part of it is evaporated. In a heat storage system that dilutes a diluted liquid by simultaneously cooling the concentrated liquid in the concentrated liquid heat exchanger and absorbing vapor evaporated from the diluted liquid, the concentrated liquid tank and the concentrated liquid heat exchanger are provided. A heat storage system characterized in that a heat exchanger is disposed in a concentrated liquid circulation line between the exchanger and the concentrated liquid that exchanges heat between the concentrated liquid going to the concentrated liquid tank and the concentrated liquid going to the concentrated liquid heat exchanger.