KR20240102574A - Absorption heat pump system providing hot and cold water - Google Patents

Abstract

According to the present embodiments, an absorption heat pump system capable of simultaneously producing cold and hot water with high efficiency can be provided.

Description

Simultaneous production of cold and hot water absorption heat pump system {ABSORPTION HEAT PUMP SYSTEM PROVIDING HOT AND COLD WATER}

These embodiments relate to an absorption heat pump system, and more specifically, to an absorption heat pump system that can simultaneously produce hot and cold water with high efficiency.

Heat pumps mainly include compression heat pumps and absorption heat pumps. Unlike compression heat pumps driven by electrical energy, absorption heat pumps pump heat using the combustion heat of gas, hot water, or steam.

An absorption heat pump is a structure that pumps heat using the combustion heat of gas, hot water, or steam, and is suitable for recovering large amounts of heat, so it is applied to large cooling loads such as data centers. Additionally, when applied in conjunction with a fuel cell, the necessary power and cold heat can be supplied together with high efficiency.

However, even if cold heat is supplied using an absorption heat pump, there is a problem that a separate system must be built to supply warm heat. In particular, even if the size of the heating load compared to the cooling load is very small, there is the inconvenience of having to build a separate system to provide the necessary heating.

These embodiments were developed against the above-described background, and can provide an absorption heat pump system that can simultaneously produce hot and cold water with high efficiency.

According to the present embodiments, an absorber that receives refrigerant from an evaporator that produces cold water and converts a high-concentration solution into a low-concentration solution, a high-temperature generator that receives a low-concentration solution from the absorber and regenerates it, and a high-temperature generator that receives refrigerant and a medium-concentration solution from the high-temperature generator. A heat pump system for simultaneous production of cold and hot water may be provided, including a low-temperature generator that regenerates, a condenser that receives refrigerant from the low-temperature generator, and a hot water production unit that produces hot water by exchanging heat with the refrigerant supplied to the condenser from the low-temperature generator.

According to the present embodiments, an absorption heat pump system capable of simultaneously producing cold and hot water with high efficiency can be provided.

Figure 1 is a configuration diagram of an absorption heat pump system for simultaneous production of cold and hot water according to the present embodiments.
Figure 2 is a configuration diagram of an absorption heat pump system for simultaneous production of cold and hot water according to the present embodiments.
Figure 3 is a configuration diagram of an absorption heat pump system for simultaneous production of cold and hot water according to the present embodiments.

Hereinafter, some embodiments of the present disclosure will be described in detail with reference to illustrative drawings. In adding reference numerals to components in each drawing, identical components may have the same reference numerals as much as possible even if they are shown in different drawings. Additionally, in describing the present embodiments, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present technical idea, the detailed description may be omitted. When “comprises,” “has,” “consists of,” etc. mentioned in the specification are used, other parts may be added unless “only” is used. When a component is expressed in the singular, it can also include the plural, unless specifically stated otherwise.

Additionally, in describing the components of the present disclosure, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and the nature, sequence, order, or number of the components are not limited by the term.

In the description of the positional relationship of components, when two or more components are described as being “connected,” “coupled,” or “connected,” the two or more components are directly “connected,” “coupled,” or “connected.” ", but it should be understood that two or more components and other components may be further "interposed" and "connected," "combined," or "connected." Here, other components may be included in one or more of two or more components that are “connected,” “coupled,” or “connected” to each other.

In the explanation of temporal flow relationships related to components, operation methods, production methods, etc., for example, temporal precedence relationships such as “after”, “after”, “after”, “before”, etc. Or, when a sequential relationship is described, non-continuous cases may be included unless “immediately” or “directly” is used.

On the other hand, when a numerical value or corresponding information (e.g. level, etc.) for a component is mentioned, even if there is no separate explicit description, the numerical value or corresponding information is related to various factors (e.g. process factors, internal or external shocks, It can be interpreted as including the error range that may occur due to noise, etc.).

FIG. 1 is a configuration diagram of an absorption heat pump system for simultaneous production of cold and hot water according to the present embodiments, FIG. 2 is a configuration diagram of an absorption heat pump system for simultaneous production of cold and hot water according to the present embodiments, and FIG. 3 is a configuration diagram of an absorption heat pump system for simultaneous production of cold and hot water according to the present embodiments. This is a diagram of the simultaneous production absorption heat pump system.

The absorption heat pump system for simultaneous production of cold and hot water according to the present embodiments receives refrigerant from an evaporator 102 that produces cold water, an absorber 103 that converts a high-concentration solution into a low-concentration solution, and supplies a low-concentration solution from the absorber 103. A high-temperature regenerator (104) that receives and regenerates the refrigerant and a medium-concentration solution from the high-temperature regenerator (104), a low-temperature regenerator (105) that receives refrigerant and regenerates it, a condenser (101) that receives refrigerant from the low-temperature regenerator (105), and a low-temperature regenerator (105). ) and a hot water production unit 120 that produces hot water by exchanging heat with the refrigerant supplied to the condenser 101.

Referring to FIG. 1, a solution in which a refrigerant and an absorption liquid are mixed is regenerated in the high-temperature generator 104 and the low-temperature generator 105. The refrigerant may be, for example, water, and the absorption liquid may be, for example, lithium bromide (LiBr).

The refrigerant evaporated in the evaporator 102 is absorbed into the absorption liquid in the absorber 103, and the high-concentration solution is converted into a low-concentration solution. In order to prevent absorption power from being reduced by absorption heat generated during the absorption process, continuous cooling is provided to the absorber 103.

The low concentration solution converted in the absorber 103 is supplied to the high temperature generator 104 by the pump 106. The low-concentration solution supplied from the absorber 103 to the high-temperature generator 104 is sequentially supplied by the intermediate heat exchanger 111 and 112, the high-concentration solution supplied from the low-temperature generator 105 to the absorber 103, and the high-temperature generator 104. It is heated by heat exchange with the medium-concentration solution supplied to the low-temperature generator 105.

The high-temperature regenerator 104 heats and regenerates the low-concentration solution supplied from the absorber 103. The heat pump system according to the present embodiments may be linked to a fuel cell to supply power, and waste heat from the fuel cell may be used as a heat source for the high-temperature generator 104. In the high-temperature generator (104), the low-concentration solution is separated into a medium-concentration solution and a refrigerant, and the separated medium-concentration solution and refrigerant are supplied to the low-temperature generator (105). The medium-concentration solution supplied from the high-temperature generator 104 to the low-temperature generator 105 is heat-exchanged with the low-concentration solution supplied from the absorber 103 to the high-temperature generator 104 in the intermediate heat exchanger 112.

In the low-temperature generator 105, heat exchange is performed between the refrigerant supplied from the high-temperature generator 104 and the medium-concentration solution. That is, the medium-concentration solution is regenerated by the heat generated as the refrigerant condenses, and the refrigerant is separated from the medium-concentration solution and converted into a high-concentration solution. The high-concentration solution converted in the low-temperature generator 105 is heat-exchanged with the low-concentration solution supplied from the absorber 103 to the high-temperature generator 104 in the intermediate heat exchanger 111.

The refrigerant separated from the medium-concentration solution in the low-temperature regenerator 105 and the liquid refrigerant used to regenerate the medium-concentration solution are supplied to the condenser 101. The refrigerant supplied from the low-temperature generator 105 to the condenser 101 may be expanded immediately, or may be condensed and then expanded and evaporated in the evaporator 102. In the drawing, an expansion valve 107 is shown as a component for expanding the refrigerant, but it is not necessarily limited to this and other expansion devices may be provided. In the evaporator 102, the refrigerant is evaporated and cold water is produced. The refrigerant evaporated in the evaporator 102 is supplied back to the absorber 103 and used to convert a high-concentration solution into a low-concentration solution.

The hot water production unit 120 produces hot water by exchanging heat with the refrigerant supplied from the low-temperature generator 105 to the condenser 101.

As shown in FIG. 1, the hot water production unit 120 may include a heat exchanger 121 provided in a line that guides the refrigerant separated from the medium concentration solution in the low temperature generator 105 to the condenser 101. The refrigerant separated from the medium-concentration solution in the low-temperature generator 105 is a gaseous phase, and the heat exchanger 121 can produce hot water through heat exchange with the gaseous refrigerant.

According to one embodiment, the heat exchanger 121 can produce hot water of 60°C or higher through heat exchange with the 84°C refrigerant supplied from the low-temperature generator 105 to the condenser 101. At this time, the ratio of the heating heat produced by the heat exchanger 121 to the cooling heat produced by the evaporator 102 is 0.66%, and the COP is 1.23, making it possible to produce hot water with high energy efficiency.

Referring to FIG. 2, the hot water production unit 120 may include a heat exchanger 122 provided in a line that guides the refrigerant used for regeneration of the medium concentration solution in the low temperature generator 105 to the condenser 101. . The liquid refrigerant condensed for regeneration of the medium-concentration solution in the low-temperature generator 105 can produce hot water through heat exchange in the heat exchanger 122, and is then expanded into a gas phase in the expansion valve 108.

According to one embodiment, the heat exchanger 122 can produce hot water of 60°C or higher through heat exchange with the 86°C refrigerant supplied from the low-temperature generator 105 to the condenser 101. At this time, the ratio of the heating heat produced by the heat exchanger 122 to the cooling heat produced by the evaporator 102 is 2.79%, and the COP is 1.26, making it possible to produce hot water with high energy efficiency.

Referring to FIG. 3, the hot water production unit 120 includes a first heat exchanger 121 and a low temperature generator 105 provided in a line that guides the refrigerant separated from the medium concentration solution in the low temperature generator 105 to the condenser 101. ) may include a second heat exchanger 122 provided in a line that guides the refrigerant used for regeneration of the medium concentration solution to the condenser 101.

According to one embodiment, the first heat exchanger 121 can produce hot water of 60°C or higher through heat exchange with the 84°C refrigerant supplied from the low-temperature generator 105 to the condenser 101. At this time, the ratio of the heating heat produced by the heat exchanger 121 to the cooling heat produced by the evaporator 102 is 0.66%, and the COP is 1.23, making it possible to produce hot water with high energy efficiency.

According to one embodiment, the second heat exchanger 122 can produce hot water of 60°C or higher through heat exchange with the 86°C refrigerant supplied from the low-temperature generator 105 to the condenser 101. At this time, the ratio of the heating heat produced by the heat exchanger 122 to the cooling heat produced by the evaporator 102 is 2.79%, and the COP is 1.26, making it possible to produce hot water with high energy efficiency.

According to the absorption heat pump system for simultaneous production of cold and hot water having this structure, an absorption heat pump system capable of simultaneously producing cold and hot water with high efficiency can be provided.

The above description is merely an illustrative explanation of the technical idea of the present disclosure, and those skilled in the art will be able to make various modifications and variations without departing from the essential characteristics of the present disclosure. In addition, the present embodiments are not intended to limit the technical idea of the present disclosure, but rather to explain it, so the scope of the present technical idea is not limited by these embodiments. The scope of protection of this disclosure should be interpreted in accordance with the claims below, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of rights of this disclosure.

101: condenser 102: evaporator
103: Absorber 104: High temperature generator
105: low temperature generator 106: pump
107: expansion valve 108: expansion valve
111: intermediate heat exchanger 112: intermediate heat exchanger
120: Hot water production department 121: Heat exchanger
122: heat exchanger

Claims (4)

An absorber that receives refrigerant from an evaporator that produces cold water and converts a high-concentration solution into a low-concentration solution;
A high-temperature generator that receives low-concentration solution from the absorber and regenerates it;
A low-temperature generator that receives refrigerant and a medium-concentration solution from the high-temperature generator and regenerates them;
A condenser that receives refrigerant from the low-temperature generator;
a hot water production unit that produces hot water by exchanging heat with the refrigerant supplied from the low-temperature generator to the condenser;
A heat pump system that simultaneously produces cold and hot water. According to claim 1,
The hot water production unit is a heat pump system for simultaneous cold and hot water production, characterized in that it includes a heat exchanger provided in a line that guides the refrigerant separated from the medium concentration solution in the low temperature generator to the condenser. According to claim 1,
The hot water production unit is a heat pump system for simultaneous cold and hot water production, characterized in that it includes a heat exchanger provided in a line that guides the refrigerant used for regeneration of the medium concentration solution in the low temperature generator to the condenser. According to claim 1,
The hot water production unit includes a first heat exchanger provided in a line that guides the refrigerant separated from the medium-concentration solution in the low-temperature generator to the condenser, and the refrigerant used for regeneration of the medium-concentration solution in the low-temperature generator to the condenser. A heat pump system for simultaneous production of cold and hot water, comprising a second heat exchanger provided in the guiding line.

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