JPH0424372Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention provides an absorbent that absorbs heat as vapor is released by heating and generates heat as it absorbs vapor in an absorber/generator. For the vessel,
The present invention relates to a chemical heat pump that is provided with a heating device for releasing steam, a heat recovery section that receives heat, an evaporator/condenser that transfers steam, and a heat transfer tube that evaporates condensed liquid in the evaporator/condenser.

[Conventional technology]

Conventionally, as shown in FIG. 3, an absorbent 1A is placed above and a heat transfer tube 2A is placed below in a heat insulation case 3, and the condensate W is placed at the bottom of the heat insulation case 3. It was configured to be stored.

[Problem that the invention attempts to solve]

However, in a heat storage state in which steam is generated from the absorbent 1A and the steam is condensed by cooling by the heat transfer tube 2A, the contact area of the heat insulation case 3 with the steam becomes large, and a large amount of steam condenses on the case wall. , the amount of external heat dissipated from the thermal insulation case 3 increases, and the loss of thermal energy increases, and
Since the upper inner surface 3A of the heat-retaining case 3 is a substantially horizontal surface, condensed liquid drips onto the absorbent 1A from the upper inner surface 3A, and the absorbent 1A is easily dissolved, and further improvements have been desired.

The purpose of this invention is to make it possible to sufficiently suppress the condensation of steam from the absorber/generator on the wall of the heat insulation case, even with simple modifications, and to sufficiently prevent the absorbent from dissolving due to condensate. It is in.

[Means for solving problems]

The characteristic configuration of the present invention is that an evaporator/condenser that transfers vapor between an absorber/generator having an absorbent is provided with a porous liquid absorber that allows the condensate to permeate, and the absorbent liquid is transferred to the side of the absorbent. The heat transfer tube is arranged over the entire lateral circumference or almost the entire lateral circumference, and the heat transfer tube is arranged inside the liquid absorbent, and the upper inner surface facing the upper part of the absorbent is inclined so that it becomes lower as the lateral side of the absorbent increases. The functions and effects are as follows.

[Effect]

In other words, the vapor generated in the absorber/generator flows into the liquid absorbing holes surrounding the absorbent, is condensed by cooling the heat transfer tube, and the condensed liquid is stored in the liquid absorbing holes. Therefore, the proportion of steam sent from the absorber-generator to the evaporator-condenser that comes into contact with the heat-insulating case is extremely small, and thermal energy loss caused by condensation due to contact with the heat-insulating case can be greatly reduced.

Furthermore, compared to, for example, providing the heat insulating case with a heating means to prevent condensation due to contact between the heat insulating case and steam, the structure can be simplified because it is sufficient to simply add porous liquid absorbing material.

Then, the condensed liquid is stored in the holes of the liquid absorber,
Eliminate contact between the condensate and the absorbent, and make sure that even if condensation occurs there, the condensate will not flow down the upper inner surface and drip onto the absorbent. This ensures that undesirable situations such as dissolution of the absorbent into the condensate can be prevented.

[Effect of idea]

As a result, even with simple modifications such as simply improving the arrangement of the absorber/generator and evaporator/condenser, the shape of the upper inner surface, and adding porous liquid absorbers,
By sufficiently reducing unnecessary condensation, it is possible to operate with good thermal efficiency, and by reliably preventing performance deterioration due to absorbent dissolution, it is possible to maintain good operation over a long period of time, improving overall performance and durability. It is now possible to provide chemical heat pumps that are superior in terms of performance and cost.

〔Example〕

Next, an example will be shown with reference to FIGS. 1 and 2.

An absorber/generator 1 having an absorbent 1A that absorbs heat as vapor is released by heating and generates heat as it absorbs the vapor, and a steam condenser 2 that transfers steam between the absorber/generator 1 and the absorber/generator 1. Heat exchangers 7A and 7B are provided in a hot water storage tank 6, which is housed inside the heat insulating case 3 and connected to the water supply pipe 4 and the hot water outlet pipe 5, for heating the water stored therein.

In the evaporator/condenser 2, a porous liquid absorber 2B is provided to allow the entire amount of condensate to permeate.
is formed into a hollow body shape with only the lower side open,
The heat transfer tube 2A is placed over the entire lateral circumference of the absorbent 1A, and the heat transfer tube 2A is placed inside the liquid absorbent 2B.
The upper inner surface S of the liquid absorbent 2B is formed into an arch-shaped, dome-shaped, or other inclined surface.

In other words, the vapor from the absorbent 1A is sent into the holes of the liquid absorber 2B without almost contacting the heat insulating case 3, and is condensed by cooling by the heat transfer tube 2A, so that the condensed liquid flows into the liquid absorber 2B. It is configured so that the absorbent 1A is stored and does not dissolve. Further, even if the liquid is condensed on the upper inner surface S of the liquid absorbent 2B, the condensed liquid is configured so as not to flow down along the inclined upper inner surface S and drip onto the absorbent 1A.

Then, a flow path 9 with a pump _P1 is provided for circulating the heat transport fluid between the absorber/generator 1 and the heating device 8 or the heat exchanger 7B for heating the stored water,
In addition, a flow path 11 with a pump _P2 is provided for circulating the heat transfer fluid between the evaporator/condenser 2 and the heat input exchanger 10 or the stored water heating heat exchanger 7A. In addition, there is a heat storage state in which the absorber/generator 1 is connected only to the heating device 8 in the operating state, and the evaporator/condenser 2 is connected to the heat exchanger 7A for heating the stored water, and the absorber/generator 1 is connected only to the heating device 8 in the operating state. Water heating heat exchanger 7B
, and the evaporator/condenser 2 is connected to the heat exchanger 10 for heat input.
Valve devices 12a and 12b are interposed in each of the flow channels 9 and 11 to selectively switch the connection state of both flow channels 9 and 11 to a heating state in which they are connected only to the heat storage state described below. This constitutes a chemical heat pump that heats the water in the hot water tank 6 by selectively displaying the and heating states and alternately repeating both states.

(B) Heat storage state [See Figure 1A] The high temperature heat transport fluid from the heating device 8 is supplied to the absorber/generator 1, and the absorbent 1A of the absorber/generator 1 is absorbed by the heat transport fluid of the heat transfer tube 2B. The absorbent 1A releases vapor by heating, and the vapor is transferred to the absorbent 2B.
flow into the hole. At the same time, the low-temperature heat transfer fluid from the heat exchanger 7A for heating the stored water is supplied to the heat transfer tube 2A of the evaporator/condenser 2, and the vapor in the liquid absorption liquid 2B is cooled and condensed by the heat transfer fluid. The heat heats the heat transfer fluid. Then, the heated heat transfer fluid is transferred to the stored water heating heat exchanger 7A.
The water in the hot water storage tank 6 is heated by the heat transfer fluid.

(B) Heating state [See Figure 1 (B)] The heat transfer fluid that has taken in heat from the outside in the heat input heat exchanger 10 is transferred to the heat transfer tube 2A of the evaporator/condenser 2.
The condensate stored in the liquid absorber 2B is heated by the heat transfer fluid to generate steam, and the steam is caused to flow into the absorber/generator 1. at the same time,
The low temperature heat transfer fluid from the heat exchanger 7B for heating the stored water is supplied to the absorber/generator 1, and in the absorber/generator 1, the steam from the evaporator/condenser 2 is transferred to the absorbent 1A.
The absorbed heat heats the heat transfer fluid. Then, the heated heat transfer fluid is supplied to the stored water heating heat exchanger 7B, and the water in the hot water storage tank 6 is heated by the heat transfer fluid.

[Another example]

Next, another embodiment will be described.

In place of the hot water storage tank 6, for example, a heat exchanger for heating or the like may be provided, and these are collectively referred to as a heat recovery section 6.

The heating type of the heating device 8 can be changed in various configurations, and the form of energy supplied to the heating device 8 can be city gas, liquid fuel, solar heat, waste heat, etc. , various methods can be applied.

A configuration for transporting heat between the absorber/generator 1 and the heating device 8 or the heat recovery section 6, and the heat transfer tube 2A
The configuration for transporting heat between the heat input heat exchanger 10 or the heat recovery section 6 can be modified in various ways.

The porous liquid absorbent 2B can be changed in shape to a cylindrical shape, etc., and can be selected from suitable materials such as sintered metal or wire mesh, and has the ability to absorb all or almost all of the condensate. ,and,
It is sufficient if they are arranged over the entire lateral circumference or almost the entire lateral circumference of the absorbent 1A.

When there is no absorbent liquid 2B above the absorbent 1A, the upper inner surface S is sloped so that it becomes lower toward the lateral side of the absorbent 1A, such as by slanting the upper inner surface of the heat insulation case 3 facing the upper part of the absorbent 1A. Any suitable changes may be made in the specific construction.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the present invention,
FIG. 1A is a conceptual diagram showing a heat storage state, FIG. 1B is a conceptual diagram showing a heating state, and FIG. 2 is a sectional view of a main part. FIG. 3 is a diagram of main parts of a conventional example. 1...Absorber and generator, 1A...Absorbent, 2...
Evaporator/condenser, 2A...heat transfer tube, 2B...liquid absorption, 6...heat recovery section, 8...heating device, S...upper inner surface.

Claims (1)

[Scope of utility model registration request] Along with absorbing heat as steam is released due to heating,
An absorbent 1A that generates heat as it absorbs steam is provided in an absorber/generator 1, and the absorber/generator 1 is equipped with a heating device 8 for releasing steam, a heat recovery section 6 for receiving heat, and a heat recovery unit 6 for receiving heat. Provides an evaporator and condenser 2 for delivery,
The chemical heat pump is equipped with a heat exchanger tube 2A for evaporating the condensate in the evaporator/condenser 2, and the evaporator/condenser 2 is provided with a porous liquid absorber 2B that allows the condensate to permeate. are arranged over the entire lateral or almost entire circumference of the absorbent 1A, the heat transfer tube 2A is arranged inside the liquid absorber 2B, and an upper inner surface S facing the upper part of the absorbent 1A is arranged.
The chemical heat pump is inclined so that it becomes lower toward the lateral side of the absorbent 1A.