WO2022235225A1 - The usage of the waste heat in liquid desiccant dehumidification system - Google Patents

The usage of the waste heat in liquid desiccant dehumidification system Download PDF

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Publication number
WO2022235225A1
WO2022235225A1 PCT/TR2021/050429 TR2021050429W WO2022235225A1 WO 2022235225 A1 WO2022235225 A1 WO 2022235225A1 TR 2021050429 W TR2021050429 W TR 2021050429W WO 2022235225 A1 WO2022235225 A1 WO 2022235225A1
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WO
WIPO (PCT)
Prior art keywords
liquid desiccant
dehumidification system
regeneration
refrigerant
liquid
Prior art date
Application number
PCT/TR2021/050429
Other languages
French (fr)
Inventor
Alper YERCIK
Süha Cem GÜVENDIREN
Original Assignee
Enerama Çevre Teknoloji̇leri̇ Sanayi̇ Ve Ti̇caret Anoni̇m Şi̇rketi̇
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Priority to PCT/TR2021/050429 priority Critical patent/WO2022235225A1/en
Publication of WO2022235225A1 publication Critical patent/WO2022235225A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • F24F3/1411—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification by absorbing or adsorbing water, e.g. using an hygroscopic desiccant
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies

Definitions

  • the invention relates to a liquid desiccant dehumidification system that enables the cooling cycle due to the use of the waste heat released by the regeneration tower to the outer environment.
  • Air conditioning is an indispensable part of today's life. Numerous studies are carried out and new products are developed in order to achieve a qualified and healthy air conditioning. Undoubtedly, the most important parameters of the studies conducted for this purpose are energy requirement and economic cost.
  • Humidity control is vital both for daily life and for production processes in different industries. For this reason, it is important to control the humidity level of the environment, to keep it at the desired level and to follow this process. In particular, in recent years, researchers have been working extensively on desiccant dehumidification systems.
  • a typical liquid desiccant system comprises a dehumidifying section (absorber/conditioner) for removing moisture from humid air by using solution.
  • a regeneration section for re-concentrating the solution is also used in this system.
  • a patent application with the publication number of US2019299158 A1 relates to a liquid desiccant system including a high desorber, a low desorber, and an absorber that are in fluid communication with a working solution, where the high desorber provides rejected water vapor from the working fluid for condensation in a condenser of the low desorber that provides heat for rejection of additional water from the working solution in the low desorber effectively multiplying the heat provided for desorption.
  • the low desorber provided the concentrated working solution to the absorber where water from ambient air is condensed into the concentrated working solution to provide a dilute working solution within a working solution conduit of the absorber that is thermally coupled to an internal cooler of the absorber.
  • the working solution can be an aqueous solution of at least one ionic liquid.
  • a patent application with the publication number of US2018036675 A1 relates to a system for continuously dehumidifying humid gas. More particularly, this document relates to a system that continuously dehumidifies gas using a liquid desiccant dehumidifying module, a regeneration module utilizing a membrane distillation module to regenerate diluted liquid desiccant and means for connecting the two modules together.
  • the invention aims to bring a solution for the negative aspects for the liquid desiccant dehumidification system stated above, constructed with the inspiration from the current state of art.
  • the main objective of the invention is to provide a liquid desiccant dehumidification system enabling the cooling cycle due to the use of the waste heat released by the regeneration tower to the outer environment. In this way, the solution that is circulated for indoor air conditioning does not have to be cooled.
  • the liquid desiccant dehumidification system of the invention there is no noticeable temperature decrease in the dehumidification process since the solution circulating in the indoor environment is not cooled. Therefore, dehumidification takes place as in the prior art. However, since the solution is warmer, there is no noticeable temperature decrease.
  • Another objective of the invention is to provide a liquid desiccant dehumidification system that prevents extra energy usage and therefore minimizes economic loss.
  • Figure 1 is the general view of liquid desiccant dehumidification system.
  • liquid desiccant dehumidification system (S) subjected to the invention is clarified such that there is no limiting effect for the sake of better understanding the subject.
  • the invention relates to the usage of the waste heat in liquid desiccant dehumidification system (S).
  • the liquid desiccant dehumidification system (S) enables the cooling cycle due to the use of the waste heat released by the regeneration tower (2) to the outer environment. Thus, there is no need to cool the recirculating liquid desiccant for air conditioning.
  • the liquid desiccant dehumidification system (S) of the invention comprises at least one regeneration tower (2).
  • the heated liquid desiccant is pumped into the regeneration tower (2).
  • the regeneration tower (2) provides the transfer of some water in the liquid desiccant to the ambient air and the removal of some heat loaded into the liquid desiccant.
  • the regeneration tower (2) takes air with the help of at least one fan. This air is brought into contact with the hot liquid desiccant. As a result of this contact, the air has moisture and heat. This air is waste air, but it is energized. This energized air is passed through at least one radiator (1 ) and therefore heat energy of the air is transferred to the refrigerant. In this sense, the radiator (1) functions as equipment that gains heat from the humid and hot waste air leaving the regeneration tower (1).
  • the absorber (9) is the unit where the air of the indoor environment is conditioned by contacting the liquid desiccant.
  • the liquid desiccant dehumidification system (S) comprises at least one evaporator (5) to cool the liquid desiccant circulating in the indoor environment (conditioning region (R)) by means of the refrigerant. Compression and circulation of the refrigerant is provided by at least one compressor (6).
  • At least one condenser (7) is used to heat the liquid desiccant circulating in the regeneration region (P) by means of the refrigerant.
  • At least one heat exchanger (8) is used to transfer the heat to each other by at least one heat exchanger (8).
  • At least one absorber pump (10) is configured to circulate the liquid desiccant in conditioning region (R) and transferred to the regeneration region (P).
  • at least one regeneration pump (11) enables recirculation of the liquid desiccant in regeneration region (P) and transferred to the conditioning region (R).
  • At least one flow meter (12) is configured to measure the flow rate in the flow of some desiccant fluid from the conditioning region (R) into the regeneration region (P).
  • the line is throttled and opened by at least one interchange valve (13).
  • throttling and opening of the line is provided by at least one level equalizer valve (14).
  • the air sucked from the outer environment (15) and the air discharged to the outer environment (16) are used to remove excess water and heat in the liquid desiccant.
  • the air sucked from the indoor environment (17) is the air to be conditioned by contacting the liquid desiccant.
  • the air discharged into the indoor environment (18) is the air conditioned by contacting the liquid desiccant.
  • the liquid desiccant dehumidification system (S) comprises at least one regeneration fan (19) and at least one absorber fan (20).
  • the regeneration fan (19) provides air circulation from the outer environment to the outer environment, and at its location, sucks the air through the regeneration tower (2) and blows the air out.
  • the absorber fan (20) provides air circulation from the indoor environment to the indoor environment, and at its location, sucks the air through the absorber (9) and blows the air to the indoor environment.
  • the strong liquid desiccant (warm) is transferred by piping A (A). This liquid desiccant is the strengthened liquid (the excess water in liquid is evaporated away) sucked from the regeneration tower (2).
  • the strong liquid desiccant (hot) is transferred by piping B (B).
  • This liquid desiccant is a strong liquid desiccant heated by the condenser (7).
  • Weak liquid desiccant (warm) is transferred by piping C (C) from the conditioning region (R) to the regeneration region (P), passing through the interchange valve (13).
  • Strong liquid desiccant (warm) is transferred by piping D (D) from the regeneration region (P) to the conditioning region (R).
  • Weak liquid desiccant (cold) is transferred by piping E (E) from the conditioning region (R) to the regeneration region (P).
  • Strong liquid desiccant (cold) is transferred by piping F (F) from the regeneration region (P) to the conditioning region (R), passing through the interchange valve (13).
  • This refrigerant has transferred its heat energy to the liquid desiccant through the condenser (7), turned from the vapor phase to the liquid phase and whose temperature has decreased.
  • the low pressure cold (liquid phase) refrigerant is transferred by piping K (K). This refrigerant sent to the radiator (1) in the regeneration tower (2) to gain heat.
  • Low pressure cold (vapor phase) refrigerant is transferred by piping L (L). This refrigerant that has gained heat from the waste heat through the radiator (1) in the regeneration tower (2).
  • Low pressure cold (liquid phase) refrigerant is transferred by piping M (M). This refrigerant sent to the evaporator (5) to gain heat.
  • Low pressure cold (vapor phase) refrigerant is transferred by piping N (N). This refrigerant , in which heat is taken from the desiccant liquid and heat is gained through the evaporator (5).
  • the radiator (1) should be placed at the air outlet of the regeneration tower (2) in order to provide the liquid desiccant dehumidification system (S) of the invention.
  • This radiator (1 ) functions as the evaporation side of the compressor (6) with the recovery of the waste heat generated by the regeneration tower (2). Air that comes into contact with the hot desiccant liquid in piping B (B) gains heat and moisture. Then, air passes through the radiator (1 ) and is discharged back to the outside environment by means of the regeneration fan (19).
  • the activation of the radiator (1 ) is provided by opening the electronic expansion valve-1 (3) and closing the electronic expansion valve-2 (4)) .
  • the desiccant liquid in piping G (G) is not cooled as it passes through the evaporator (5).
  • the liquid desiccant dehumidification system (S) comprises a compressor (6) operating with refrigerant. At least one compressor (6), a condenser (7), an expansion valve and an evaporator (5) are required in order to perform at least a cooling cycle. It is possible to use two evaporators (5) and expansion valves (3, 4) in the invention. These are activated depending on whether the temperature of the liquid desiccant (in piping H (H)) pumped to the absorbers (9) is higher than the desired temperature or not.
  • the electronic expansion valve-2 (4) is completely closed to deactivate the evaporator (5) that cools the liquid.
  • the radiator (1 ) which gains energy from the waste heat, is activated by opening the electronic expansion valve-1 (3). In this way, the cooling cycle and regeneration continues.
  • the liquid desiccant (in piping H (H)) pumped to the absorbers (9) is not cooled.
  • the invention relates to a liquid desiccant dehumidification system (S) having at least one compressor (6) and at least one regeneration tower (2), comprising:
  • At least one radiator (1) that is placed at the air outlet of the regeneration tower (2) for gaining heat from the humid and hot waste air leaving the regeneration tower (2)
  • At least one piping K (K) to send the refrigerant in liquid phase to the radiator (1) in the regeneration tower (2) to gain heat

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Central Air Conditioning (AREA)

Abstract

The invention relates to a liquid desiccant dehumidification system (S) enabling the cooling cycle due to the use of the waste heat released by the regeneration tower (2) to the outer environment.

Description

THE USAGE OF THE WASTE HEAT IN LIQUID DESICCANT DEHUMIDIFICATION SYSTEM
Technical Field
The invention relates to a liquid desiccant dehumidification system that enables the cooling cycle due to the use of the waste heat released by the regeneration tower to the outer environment.
The State of Art
Air conditioning is an indispensable part of today's life. Numerous studies are carried out and new products are developed in order to achieve a qualified and healthy air conditioning. Undoubtedly, the most important parameters of the studies conducted for this purpose are energy requirement and economic cost.
Humidity control is vital both for daily life and for production processes in different industries. For this reason, it is important to control the humidity level of the environment, to keep it at the desired level and to follow this process. In particular, in recent years, researchers have been working extensively on desiccant dehumidification systems.
A typical liquid desiccant system comprises a dehumidifying section (absorber/conditioner) for removing moisture from humid air by using solution. In addition to this, a regeneration section for re-concentrating the solution is also used in this system.
There is no use of waste heat from the regeneration tower in the systems in the state of the art. For this reason, the solution circulating in the air-conditioned area must be cooled. It is necessary to use an extra heater to tolerate the temperature difference caused by this cooling. This leads to extra energy consumption.
A patent application with the publication number of US2019299158 A1 relates to a liquid desiccant system including a high desorber, a low desorber, and an absorber that are in fluid communication with a working solution, where the high desorber provides rejected water vapor from the working fluid for condensation in a condenser of the low desorber that provides heat for rejection of additional water from the working solution in the low desorber effectively multiplying the heat provided for desorption. The low desorber provided the concentrated working solution to the absorber where water from ambient air is condensed into the concentrated working solution to provide a dilute working solution within a working solution conduit of the absorber that is thermally coupled to an internal cooler of the absorber. In some embodiments, the working solution can be an aqueous solution of at least one ionic liquid.
A patent application with the publication number of US2018036675 A1 relates to a system for continuously dehumidifying humid gas. More particularly, this document relates to a system that continuously dehumidifies gas using a liquid desiccant dehumidifying module, a regeneration module utilizing a membrane distillation module to regenerate diluted liquid desiccant and means for connecting the two modules together.
As a result, an improvement needs to be made since current applications cannot solve problems in the technical field.
The Purpose of the Invention
The invention aims to bring a solution for the negative aspects for the liquid desiccant dehumidification system stated above, constructed with the inspiration from the current state of art.
The main objective of the invention is to provide a liquid desiccant dehumidification system enabling the cooling cycle due to the use of the waste heat released by the regeneration tower to the outer environment. In this way, the solution that is circulated for indoor air conditioning does not have to be cooled. In the liquid desiccant dehumidification system of the invention, there is no noticeable temperature decrease in the dehumidification process since the solution circulating in the indoor environment is not cooled. Therefore, dehumidification takes place as in the prior art. However, since the solution is warmer, there is no noticeable temperature decrease.
Another objective of the invention is to provide a liquid desiccant dehumidification system that prevents extra energy usage and therefore minimizes economic loss.
The structural and characteristic specifications of the invention and the advantages will be better understood with the help of Figures given below and the detail explanation referring those Figures, so the evaluation of the invention should be carried out accordingly.
Figures for Better Understanding the Invention Figure 1 is the general view of liquid desiccant dehumidification system.
Explanation of the Reference Numbers
S Liquid desiccant dehumidification system
1 Radiator
2 Regeneration tower
3 Electronic expansion valve- 1
4 Electronic expansion valve-2
5 Evaporator
6 Compressor
7 Condenser
8 Heat exchanger
9 Absorber
10 Absorber pump
11 Regeneration pump
12 Flow meter
13 Interchange valve
14 Level equalizer valve
15 Air sucked from the outer environment
16 Air discharged to the outer environment
17 Air sucked from the indoor environment
18 Air discharged into the indoor environment
19 Regeneration fan
20 Absorber fan A Piping A
B Piping B C Piping C D Piping D E Piping E F Piping F G Piping G H Piping H I Piping I J Piping J K Piping K L Piping L M Piping M N Piping N
P Regeneration Region R Conditioning Region
Detailed Explanation of the Invention
In this section, the preferred embodiments of liquid desiccant dehumidification system (S) subjected to the invention is clarified such that there is no limiting effect for the sake of better understanding the subject.
The invention relates to the usage of the waste heat in liquid desiccant dehumidification system (S). In the invention, the liquid desiccant dehumidification system (S) enables the cooling cycle due to the use of the waste heat released by the regeneration tower (2) to the outer environment. Thus, there is no need to cool the recirculating liquid desiccant for air conditioning.
The liquid desiccant dehumidification system (S) of the invention comprises at least one regeneration tower (2). In the liquid desiccant dehumidification system (S), the heated liquid desiccant is pumped into the regeneration tower (2). The regeneration tower (2) provides the transfer of some water in the liquid desiccant to the ambient air and the removal of some heat loaded into the liquid desiccant. The regeneration tower (2) takes air with the help of at least one fan. This air is brought into contact with the hot liquid desiccant. As a result of this contact, the air has moisture and heat. This air is waste air, but it is energized. This energized air is passed through at least one radiator (1 ) and therefore heat energy of the air is transferred to the refrigerant. In this sense, the radiator (1) functions as equipment that gains heat from the humid and hot waste air leaving the regeneration tower (1).
In the liquid desiccant dehumidification system (S) of the present invention, there is at least one absorber (9). The absorber (9) is the unit where the air of the indoor environment is conditioned by contacting the liquid desiccant.
If the liquid desiccant circulating in the indoor environment is aimed to be cooled, the electronic expansion valve-1 (3) is closed and the electronic expansion valve-2 (4) is activated. Thus, the liquid desiccant circulating in the indoor environment is cooled as in the systems in the prior art. If the liquid desiccant circulating in the indoor environment is not desired to be cooled, the electronic expansion valve-1 (3) is activated and the electronic expansion valve-2 (4) is closed. Thus, the refrigerant gains heat energy from the waste heat of the regeneration tower (2). The liquid desiccant dehumidification system (S) comprises at least one evaporator (5) to cool the liquid desiccant circulating in the indoor environment (conditioning region (R)) by means of the refrigerant. Compression and circulation of the refrigerant is provided by at least one compressor (6).
At least one condenser (7) is used to heat the liquid desiccant circulating in the regeneration region (P) by means of the refrigerant. During the flow of weak liquid desiccant and strong liquid desiccant from two regions (regeneration region (P) and conditioning region (R)), their heat is transferred to each other by at least one heat exchanger (8).
In the liquid desiccant dehumidification system (S) of the present invention, at least one absorber pump (10) is configured to circulate the liquid desiccant in conditioning region (R) and transferred to the regeneration region (P). In addition, at least one regeneration pump (11) enables recirculation of the liquid desiccant in regeneration region (P) and transferred to the conditioning region (R).
At least one flow meter (12) is configured to measure the flow rate in the flow of some desiccant fluid from the conditioning region (R) into the regeneration region (P). In order for the flow measured with the flow meter (12) to equal the desired value, the line is throttled and opened by at least one interchange valve (13). In order to be proper level in absorbers (9) and regeneration towers (2), throttling and opening of the line is provided by at least one level equalizer valve (14).
In the working principle of the liquid desiccant dehumidification system (S), the air sucked from the outer environment (15) and the air discharged to the outer environment (16) are used to remove excess water and heat in the liquid desiccant. The air sucked from the indoor environment (17) is the air to be conditioned by contacting the liquid desiccant. The air discharged into the indoor environment (18) is the air conditioned by contacting the liquid desiccant.
The liquid desiccant dehumidification system (S) comprises at least one regeneration fan (19) and at least one absorber fan (20). The regeneration fan (19) provides air circulation from the outer environment to the outer environment, and at its location, sucks the air through the regeneration tower (2) and blows the air out. The absorber fan (20) provides air circulation from the indoor environment to the indoor environment, and at its location, sucks the air through the absorber (9) and blows the air to the indoor environment. The strong liquid desiccant (warm) is transferred by piping A (A). This liquid desiccant is the strengthened liquid (the excess water in liquid is evaporated away) sucked from the regeneration tower (2). The strong liquid desiccant (hot) is transferred by piping B (B). This liquid desiccant is a strong liquid desiccant heated by the condenser (7). Weak liquid desiccant (warm) is transferred by piping C (C) from the conditioning region (R) to the regeneration region (P), passing through the interchange valve (13). Strong liquid desiccant (warm) is transferred by piping D (D) from the regeneration region (P) to the conditioning region (R). Weak liquid desiccant (cold) is transferred by piping E (E) from the conditioning region (R) to the regeneration region (P). Strong liquid desiccant (cold) is transferred by piping F (F) from the regeneration region (P) to the conditioning region (R), passing through the interchange valve (13).
Weak liquid desiccant (cold) is transferred by piping G (G) into the evaporator (5) to be cooled. However, when the evaporator (5) is disabled, cooling is not performed. Liquid desiccant (cold) is transferred by piping H (H). This liquid is very cold when the evaporator (5) is active. However, when the evaporator (5) is not activated, this liquid is at the same temperature as the evaporator (5) inlet. High pressure and hot refrigerant (vapor phase) is transferred by piping I (I). This refrigerant which is compressed with the compressor (6), so its pressure and temperature have increased. High pressure and warm refrigerant (liquid phase) is transported by piping J (J). This refrigerant has transferred its heat energy to the liquid desiccant through the condenser (7), turned from the vapor phase to the liquid phase and whose temperature has decreased. The low pressure cold (liquid phase) refrigerant is transferred by piping K (K). This refrigerant sent to the radiator (1) in the regeneration tower (2) to gain heat. Low pressure cold (vapor phase) refrigerant is transferred by piping L (L). This refrigerant that has gained heat from the waste heat through the radiator (1) in the regeneration tower (2). Low pressure cold (liquid phase) refrigerant is transferred by piping M (M). This refrigerant sent to the evaporator (5) to gain heat. Low pressure cold (vapor phase) refrigerant is transferred by piping N (N). This refrigerant , in which heat is taken from the desiccant liquid and heat is gained through the evaporator (5).
The radiator (1) should be placed at the air outlet of the regeneration tower (2) in order to provide the liquid desiccant dehumidification system (S) of the invention. This radiator (1 ) functions as the evaporation side of the compressor (6) with the recovery of the waste heat generated by the regeneration tower (2). Air that comes into contact with the hot desiccant liquid in piping B (B) gains heat and moisture. Then, air passes through the radiator (1 ) and is discharged back to the outside environment by means of the regeneration fan (19). The activation of the radiator (1 ) is provided by opening the electronic expansion valve-1 (3) and closing the electronic expansion valve-2 (4)) . Thus, the desiccant liquid in piping G (G) is not cooled as it passes through the evaporator (5). In a preferred embodiment of the invention, the liquid desiccant dehumidification system (S) comprises a compressor (6) operating with refrigerant. At least one compressor (6), a condenser (7), an expansion valve and an evaporator (5) are required in order to perform at least a cooling cycle. It is possible to use two evaporators (5) and expansion valves (3, 4) in the invention. These are activated depending on whether the temperature of the liquid desiccant (in piping H (H)) pumped to the absorbers (9) is higher than the desired temperature or not.
If the temperature of the desiccant liquid (in piping H (H)) pumped to the absorbers (9) is low, the electronic expansion valve-2 (4) is completely closed to deactivate the evaporator (5) that cools the liquid. During this closing, the radiator (1 ), which gains energy from the waste heat, is activated by opening the electronic expansion valve-1 (3). In this way, the cooling cycle and regeneration continues. However, the liquid desiccant (in piping H (H)) pumped to the absorbers (9) is not cooled.
In order to fulfill all aims of the invention and solve the problems of the state of art, the invention relates to a liquid desiccant dehumidification system (S) having at least one compressor (6) and at least one regeneration tower (2), comprising:
• At least one radiator (1) that is placed at the air outlet of the regeneration tower (2) for gaining heat from the humid and hot waste air leaving the regeneration tower (2),
• At least one electronic expansion valve-1 (3) and/or at least one electronic expansion valve-2 (4) for refrigerant to gain heat energy from the waste heat of the regeneration tower (2),
• At least one piping K (K) to send the refrigerant in liquid phase to the radiator (1) in the regeneration tower (2) to gain heat,
• At least one piping L (L) to send the refrigerant in vapor phase to the radiator (1) in the regeneration tower (2) to gain heat.

Claims

1. A liquid desiccant dehumidification system (S) having at least one regeneration tower (2) and at least one compressor (6), comprising:
• At least one radiator (1 ) that is placed at the air outlet of the regeneration tower (2) for gaining heat from the humid and hot waste air leaving the regeneration tower (2),
• At least one electronic expansion valve-1 (3) and/or at least one electronic expansion valve-2 (4) for refrigerant to gain heat energy from the waste heat of the regeneration tower (2),
• At least one piping K (K) to send the refrigerant in liquid phase to the radiator (1 ) in the regeneration tower (2) to gain heat,
• At least one piping L (L) to send the refrigerant in vapor phase to the radiator (1 ) in the regeneration tower (2) to gain heat.
2. A liquid desiccant dehumidification system (S) according to Claim 1 , comprising at least one absorber (9) for conditioning the air by contacting a liquid desiccant.
3. A liquid desiccant dehumidification system (S) according to any of the preceding claims, comprising at least one absorber pump (10) for circulation the liquid desiccant.
4. A liquid desiccant dehumidification system (S) according to any of the preceding claims, comprising at least one regeneration pump (11 ).
5. A liquid desiccant dehumidification system (S) according to any of the preceding claims, comprising at least one flow meter (12) for measuring the flow rate in the flow of desiccant fluid from the conditioning loop into the regeneration region (P).
6. A liquid desiccant dehumidification system (S) according to any of the preceding claims, comprising at least one interchange valve (13) and at least one level equalizer valve (14) for throttling and/or opening the line to reach the desired flow rate value.
7. A liquid desiccant dehumidification system (S) according to any of the preceding claims, comprising at least one regeneration fan (19) and at least one absorber fan (20) for prodiving air circulation.
8. A liquid desiccant dehumidification system (S) according to any of the preceding claims, comprising at least one evaporator (5) for cooling the liquid desiccant circulating in the indoor environment by means of the refrigerant.
9. A liquid desiccant dehumidification system (S) according to any of the preceding claims, comprising at least one condenser (7) for heating the liquid desiccant circulating in the outer environment with the refrigerant.
PCT/TR2021/050429 2021-05-05 2021-05-05 The usage of the waste heat in liquid desiccant dehumidification system WO2022235225A1 (en)

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* Cited by examiner, † Cited by third party
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JPS5995929A (en) * 1982-11-22 1984-06-02 Osaka Gas Co Ltd Class 2 absorption type heat pump
EP1734317A1 (en) * 2005-06-16 2006-12-20 LG Electronics, Inc. Cogeneration system
US20140260399A1 (en) * 2013-03-14 2014-09-18 7Ac Technologies, Inc. Methods and systems for mini-split liquid desiccant air conditioning
GB2548590A (en) * 2016-03-22 2017-09-27 Gulf Organisation For Res And Dev Smart cooling system for all climates
US20200182493A1 (en) * 2018-12-06 2020-06-11 7Ac Technologies, Inc. Liquid desiccant air-conditioning systems and methods for greenhouses and growth cells

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5995929A (en) * 1982-11-22 1984-06-02 Osaka Gas Co Ltd Class 2 absorption type heat pump
EP1734317A1 (en) * 2005-06-16 2006-12-20 LG Electronics, Inc. Cogeneration system
US20140260399A1 (en) * 2013-03-14 2014-09-18 7Ac Technologies, Inc. Methods and systems for mini-split liquid desiccant air conditioning
GB2548590A (en) * 2016-03-22 2017-09-27 Gulf Organisation For Res And Dev Smart cooling system for all climates
US20200182493A1 (en) * 2018-12-06 2020-06-11 7Ac Technologies, Inc. Liquid desiccant air-conditioning systems and methods for greenhouses and growth cells

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