88 results about "Liquid desiccant" patented technology

Systems and methods for conditioning air streams are described herein. In some embodiments, a system can include an absorber and a desorber. The absorber configured to receive a supply air stream including moisture at a first moisture concentration and expose it to a liquid desiccant to remove moisture from the supply air stream and produce a conditioned air stream. The desorber configured to receive a regeneration stream at a first mass flow rate and at least a portion of the liquid desiccant from the absorber and having at least one salt at a first weight percent. The desorber includes an array of emitters configured to direct the portion of the liquid desiccant at a second mass flow rate to a desorber media to facilitate removing moisture from the portion of the liquid desiccant and produce a concentrated liquid desiccant with the at least one salt at a second weight percent.

Liquid desiccant air conditioning systems and methods to operate them to achieved desired supply air dry bulb temperature and humidity conditions are described herein. In some embodiments, the liquid desiccant air conditioning systems can include a cooling unit, an absorber, a regenerator, and a control unit. The control unit can be operably coupled to the cooling unit, the absorber, and the regenerator such that the control unit can operate the liquid desiccant system to produce a supply air stream at a relatively independent target temperature and humidity. In some embodiments, the control unit can adjust one or more parameters and / or variables of the components of the liquid desiccant system to produce the supply air stream at a high energy efficiency.

A system comprises a liquid desiccant regeneration system, a first air contactor stage, and a second air contactor stage. The regeneration system has a first stage with a first concentration output and first diluted output, and a second stage with a second concentration output, different from the first concentration output, and a second diluted output. The first air contactor stage is coupled to the first concentrated output to form a first output air stream having a reduced water content and a first diluted air contactor output. The second air contactor stage is coupled to the second concentrated output to form a second output air stream having a reduced water content and a second diluted air contactor output. Both diluted air contactor outputs are recirculated into the regeneration system, and the output air streams are combined.

A liquid desiccant system includes a liquid desiccant loop having an absorber unit in fluid communication with a desorber unit and liquid desiccant flowing between the absorber unit and the desorber unit. The liquid desiccant system includes a supply airflow path passing through the absorber unit and forming an absorber liquid / air interface within the absorber unit and a conditioned airflow exiting the absorber unit. The liquid desiccant system includes a regeneration airflow path passing through the desorber unit and forming a desorber liquid / air interface within the desorber unit and an exhaust airflow exiting the desorber unit. A heat exchanger is thermally coupled to the supply airflow path for removing heat from supply airflow upstream of the absorber unit. A heat exchanger is thermally coupled to the regeneration airflow path adding heat to regeneration airflow upstream of the desorber unit.

Systems and methods for conditioning air streams are described herein. In some embodiments, a system can include an absorber and a desorber. The absorber configured to receive a supply air stream including moisture at a first moisture concentration and expose it to a liquid desiccant to remove moisture from the supply air stream and produce a conditioned air stream. The desorber configured to receive a regeneration stream at a first mass flow rate and at least a portion of the liquid desiccant from the absorber and having at least one salt at a first weight percent. The desorber includes an array of emitters configured to direct the portion of the liquid desiccant at a second mass flow rate to a desorber media to facilitate removing moisture from the portion of the liquid desiccant and produce a concentrated liquid desiccant with the at least one salt at a second weight percent.

A liquid desiccant regenerator configured to produce a first output stream with a higher concentration of a liquid desiccant than a first input stream. The regenerator also produces a second output stream with a lower concentration of the liquid desiccant than a second input stream. Regeneration of the liquid desiccant in the liquid desiccant regenerator decreases a temperature of the liquid desiccant regenerator. The system includes an air contactor coupled to the first output stream and exposing an input air stream to the first output stream. The first output stream absorbs water from the input air stream to form at least one diluted output desiccant stream. A heat pump of the system is thermally coupled to move the heat from the first output stream to the liquid desiccant regenerator. The heat moved to the liquid desiccant regenerator increases an efficiency of the liquid desiccant regenerator.

The present disclosure relates to a window type liquid desiccant dehumidification and ventilation system including: an air feed part having an air feed chamber consisting of an inner wall coming in contact with the inside of a building and an outer wall coming in contact with the outside of the building, a flow path being formed between the inner wall and the outer wall to allow outdoor air to be introduced into the inside of the building; a heating part for receiving a desiccant therein to heat the desiccant; a spray part for spraying the desiccant received in the heating part into the inner wall of the air feed chamber that faces the flow path to thus form a liquid film; and a cooling part for cooling the desiccant prior to spraying the desiccant into the inner wall of the air feed chamber.

A conditioning system includes a first plenum and a second plenum. The second plenum receives heated air from an enclosed space and supplies cooled air to the space. The system also includes a first liquid-to-air membrane energy exchanger (LAMEE1) arranged inside the first plenum. LAMEE1 is configured to use a liquid desiccant to lower an enthalpy of the first air stream. A LAMEE2 is arranged inside the first plenum downstream of LAMEE1. LAMEE2 is configured to use the first air stream to evaporatively cool water flowing through LAMEE2. A first LAHX (LAHX1) is arranged inside the second plenum. LAHX1 is configured to directly and sensibly cool the second air stream using a first cooling fluid. A second LAHX (LAHX2) is in fluid communication with LAMEE1 and is configured to receive the liquid desiccant from LAMEE1 and cool the liquid desiccant using outdoor air.

A membrane distillation regenerator can include a first liquid channel through which a first liquid flows at a first temperature, a second liquid channel through which a second liquid flows from the first liquid channel and at a second temperature higher than the first temperature, a condensation cell disposed between the first liquid channel and the second liquid channel, and a permeable membrane disposed between the second liquid channel and the condensation cell. The regenerator can include several distillation stages in which the vapor separated from the second liquid can pass from an evaporation chamber of the second liquid channel through the membrane and into a corresponding condensation chamber of the condensation cell.

A heat exchanger includes plate assemblies arranged to define airflow gaps between adjacent plate assemblies, allowing air to flow in one airflow direction. Each plate assembly includes a frame having two headers and a center section, a diaphragm disposed on the frame, and two airflow restricting elements disposed at each header of the frame. For each header, a first airflow restricting element is located on a first side of the frame and a second airflow restricting element is located on a second side of the frame.In each pair of adjacent plate assemblies, the central portions are spaced apart to define the airflow gap, and the first airflow restricting elements of a first plate assembly engage the second airflow restricting elements of a second plate assembly to form two airflow restrictors at opposite ends of the airflow gap relative to a direction other than the airflow direction.

An atmospheric water capturing device for transforming water vapor into liquid water has a plurality of channels. The device further includes a plurality of hydrogel membranes. Each hydrogel membrane having a surface that at least partly defines a respective channel of the plurality of channels. A liquid desiccant is in contact with a side of each hydrogel membrane opposite the surface of the hydrogel membrane that at least partly defines the respective channel.

A liquid desiccant dedicated vapor compression system (100) is disclosed. The system comprises an evaporator (104) fluidically connected to a condenser (102) through a compressor (106), an absorber (112) fluidically connected to the evaporator to facilitate flow of air through the evaporator and the absorber, and a desorber (114) fluidically connected to the absorber to facilitate the flow of the desiccant solution therebetween and further fluidically connected to the condenser to facilitate the flow of air through the condenser and the desorber. An inlet of a first refrigerant tube (112-1) associated with the absorber, and an inlet of evaporator coils associated with the evaporator are fluidically connected to an outlet of the condenser via two different expansion valves. Further, an inlet of a second refrigerant tube (114-2) associated with a desorber and an inlet of condenser coils associated with the condenser are fluidically connected to an outlet of the compressor.

A liquid desiccant system includes a liquid desiccant loop having an absorber unit in fluid communication with a desorber unit and liquid desiccant flowing between the absorber unit and the desorber unit. The liquid desiccant system includes a supply airflow path passing through the absorber unit and forming an absorber liquid / air interface within the absorber unit and a conditioned airflow exiting the absorber unit. The liquid desiccant system includes a regeneration airflow path passing through the desorber unit and forming a desorber liquid / air interface within the desorber unit and an exhaust airflow exiting the desorber unit. A heat exchanger is thermally coupled to the supply airflow path for removing heat from supply airflow upstream of the absorber unit. A heat exchanger is thermally coupled to the regeneration airflow path adding heat to regeneration airflow upstream of the desorber unit.

A moisture swing system including a moisture swing housing including a moisture swing material and a liquid desiccant (LD) regenerator is provided. The LD regenerator is adapted to contact a low concentration liquid desiccant (LCLD) stream with a dry CO2 feed stream, where moisture from the LCLD stream is transferred into the CO2 feed stream as water vapor to form a high concentration liquid desiccant (HCLD) stream and a wet CO2 feed stream. The wet CO2 stream is contacted with the moisture swing material to form a wet, concentrated CO2 stream that exits the moisture swing housing. The system can also include a LD conditioner adapted to produce a dry CO2-rich target stream to contact with the moisture swing material. The LD conditioner and the LD regenerator can be connected to produce a closed-loop system that uses and regenerates the LD used in the moisture swing system.

An air treatment system includes a three-way heat exchanger, a heat transfer fluid loop, and a pre-treatment heat exchanger positioned on the heat transfer fluid loop. The three-way heat exchanger is operable to transfer heat and moisture between air, a liquid desiccant, and a heat transfer fluid. The heat transfer fluid loop circulates the heat transfer fluid between the three-way heat exchanger and a second heat exchanger operable to transfer heat between the heat transfer fluid and a third working fluid. The pre-treatment heat exchanger is positioned on the heat transfer fluid loop between the second heat exchanger and the three-way heat exchanger and is operable to transfer heat between the air and the heat transfer fluid upstream from the three-way heat exchanger.

A liquid desiccant (LD) based dehumidification system is provided for heating, ventilation, air conditioning, and refrigeration (HVAC&R) systems. The LD based dehumidification system includes a contact media device including a media for being disposed in an air stream to be dehumidified, a surfactant, and a LD for wetting the media. The LD is dosed with the surfactant to adjust the wettability of the media by the LD.

The invention relates to the technical field of perovskite solar cells, and particularly discloses a cell module, a cell packaging device and a cell packaging method. Wherein the battery assembly comprises a substrate, a battery layer and a cover plate which are sequentially stacked, the battery layer is coated with a liquid desiccant, a welding seam ring is arranged between the substrate and the cover plate, a closed space is defined by the welding seam ring, the substrate and the cover plate, and the battery layer and the liquid desiccant are sealed in the closed space. According to the invention, the battery assembly adopts a mode of combining edge welding packaging and the liquid drying agent, so that the packaging sealing performance is ensured, and the influence of water vapor invasion is avoided. In addition, the liquid drying agent has certain viscosity, so that the connection strength between the battery layer and the cover plate can be enhanced. The liquid desiccant also has high light transmittance, and does not affect the photoelectric conversion process of the perovskite solar cell. Compared with a common drying agent, the liquid drying agent is thinner, and welding of the substrate and the cover plate is facilitated.

A liquid desiccant (LD)-based dehumidification system is provided for heating, ventilation, air-conditioning and refrigeration (HVAC&R) systems. The LD-based dehumidification system includes a contact media device including media for disposition in a flow of air to be dehumidified, surfactant and LD to wet the media. The LD is dosed with the surfactant to adjust a wettability of the media by the LD.

To improve heat exchange capacity of a gas-liquid contactor.SOLUTION: A gas-liquid contactor includes: a first heat transfer pipe which has a tubular shape and forms a heat medium flow passage in an inside thereof so that a heat medium flows therethrough; a second heat transfer pipe which is arranged to be separated from the first heat transfer pipe in a vertical direction and a horizontal direction, has a tubular shape, and forms a heat medium flow passage in an inside thereof so that the heat medium flows therethrough; and a long first gas-liquid contact member. The first gas-liquid contact member is arranged to come into contact with an outer peripheral surface on a side opposite from an outer peripheral surface confronting the second heat transfer pipe of the first heat transfer pipe and to come into contact with an outer peripheral surface on a side opposite from an outer peripheral surface confronting the first heat transfer pipe of the second heat transfer pipe.SELECTED DRAWING: Figure 2

The invention relates to a heat exchanger and a method of operating a heat exchanger. The heat exchanger is operable to condition the air using a liquid desiccant. The heat exchanger includes an airflow inlet, an airflow outlet, a heat exchange structure positioned between the airflow inlet and the airflow outlet, and a mesh screen positioned at the airflow outlet. Each heat exchange structure has a surface for the flow of a liquid desiccant. The screen selectively removes entrained liquid desiccant from the air.

A system for controlling water content in an air stream (7) comprising a contact device (3) for transferring thermal energy and water vapor between a liquid desiccant (5) and the air stream (7) flowing through the contact device. The system comprises further a regeneration part (11) for removing water from the liquid desiccant (5) and a recirculation part (21) for recirculate the liquid desiccant, wherein the system further comprises at least one liquid desiccant temperature restoring device 31a, 31b provided in the regeneration part (11) and / or in the recirculation part (21), where said liquid desiccant temperature restoring device 31a, 31b comprises an air-to-liquid heat exchanger (33) and a fan (35), wherein said air-to-liquid heat exchanger (33) is connected in the system such that liquid desiccant 5 passes through the air-to-liquid heat exchanger for being tempered by ambient air and wherein said fan (35) is positioned in the system such that the ambient air is directed by the action from the fan to flow towards the air-to-liquid heat exchanger.

A regeneration system includes: a liquid desiccant regeneration loop including a liquid desiccant tank and a heat and mass exchanger; and a refrigerant circuit including a first heating zone and a second heating zone, where a temperature in the first heating zone is higher than a temperature in the second heating zone. Low-concentration liquid desiccant in the liquid desiccant tank sequentially flows from the second heating area to the first heating area, then passes through the heat and mass exchanger and is stored as high-concentration liquid desiccant; and a portion of the low concentration liquid desiccant exiting the first heating zone or the second heating zone is used as a heating fluid for the heat and mass exchanger. A method of operating such a regeneration system is also provided.

An air conditioning system comprises a humidity control system, a vapor compression system, and a heat exchanger. The humidity control system includes a primary fan that generates a primary airflow, a primary mass exchange device within the primary airflow, a secondary fan that generates a secondary airflow, and a secondary mass exchange device within the secondary airflow and in fluid communication with the primary mass exchange device, enabling the flow of a liquid desiccant in a liquid desiccant circuit. The vapor compression system comprises an evaporator and a condenser, which is in fluid communication with the evaporator and enables the flow of a refrigerant in a refrigerant circuit.The heat exchanger has a first path that is in fluid connection with the humidity control system and allows the flow of liquid desiccant, and a second path that is thermally coupled to the first path and is in fluid connection with the vapor compression system and allows the flow of refrigerant.

The invention relates to a three-way heat exchanger, a heating, ventilation and air conditioning system and a method for operating a heat exchanger. The three-way heat exchanger is operable to transfer heat between the heat transfer fluid, the liquid desiccant, and the air. A three-way heat exchanger includes an airflow inlet, an airflow outlet, and panel assemblies arranged with airflow gaps defined between adjacent panel assemblies to allow air to flow between the airflow inlet and the airflow outlet in an airflow direction. Each panel assembly includes: a frame defining a heat transfer fluid channel for directing a flow of a heat transfer fluid through the panel assembly; and a membrane positioned on the frame and defining a desiccant channel for the flow of liquid desiccant. The frame has a leading edge proximate the airflow inlet and a trailing edge proximate the airflow outlet. The leading edges of the frame of the panel assembly each include a leading edge aerodynamic feature.

The disclosure relates to mass transfer assemblies for heating ventilation and cooling systems.

The disclosure relates to heat-mass exchangers. In some examples, a heat-mass exchanger includes a housing configured to receive a flow of supply air cooled and dehumidified by a liquid desiccant conditioner system. The heat-mass exchanger also includes a header configured to receive low concentration liquid desiccant from the liquid desiccant conditioner system, and feed the low concentration liquid desiccant onto one or more heat transfer tubes within the housing. The one or more heat transfer tubes are configured to dissipate heat to the liquid desiccant to generate relatively higher concentration desiccant. Further, the heat-mass exchanger includes a collector that is configured to capture the higher concentration desiccant, and feed the higher concentration desiccant to the liquid desiccant conditioner system.

The present invention provides an air conditioner having a first working side and a second working side, and including a temperature control system and a humidity control system. The temperature control system is provided with an evaporator on the first working side and a condenser on the second working side. The humidity control system includes a first humidity control device and a second humidity control device, wherein a liquid desiccant is provided within the humidity control system. The first humidity control device is disposed near the evaporator and is configured to cool the liquid desiccant on the first working side and absorb moisture near the evaporator. The second humidity control device is disposed near the condenser and is configured to heat the liquid desiccant on the second working side and release moisture near the condenser. The air conditioner of the present invention fully utilizes the cooling capacity removed from the indoor side by the liquid desiccant in heating mode or the heat removed from the indoor side in cooling mode, and uses the cooling capacity to cool the condenser in heating mode or heat the evaporator in cooling mode, thereby improving the heat exchange efficiency of the air conditioner's outdoor unit.

A liquid desiccant system includes a liquid desiccant circuit having an absorber unit and a liquid desiccant, the absorber unit being in fluid communication with a desorber unit, the liquid desiccant flowing between the absorber unit and the desorber unit. The liquid desiccant system includes a supply airflow path that passes through the absorber unit, forms an absorber liquid / air interface within the absorber unit, and forms a conditioned airflow exiting the absorber unit. The liquid desiccant system includes a regeneration gas flow path that passes through the desorber unit, forms a desorber liquid / air interface within the desorber unit, and forms an exhaust gas flow exiting the desorber unit. A heat exchanger is thermally coupled to the supply airflow path to remove heat from the supply airflow upstream of the absorber unit. A heat exchanger is thermally coupled to the regeneration gas stream path to add heat to the regeneration gas stream upstream of the desorber unit.

Liquid desiccant air conditioning systems and methods for operating them to achieve desired supply air dry-bulb temperature and humidity conditions are described herein. In some embodiments, a liquid desiccant air conditioning system may include a cooling unit, an absorber, a regenerator, and a control unit. A control unit may be operably coupled to the cooling unit, the absorber, and the regenerator such that the control unit may operate the liquid desiccant system to produce a supply air flow at relatively independent target temperatures and humidity. In some embodiments, a control unit may adjust one or more parameters and / or variables of components of the liquid desiccant system to generate a supply air flow at high energy efficiency.

The utility model provides a cleaning agent drying device which comprises a box body, heating bins are symmetrically arranged in the two ends of the box body, an adjusting bin is arranged between the heating bins on the two sides, a heating cleaning mechanism is movably arranged in each heating bin, and each heating cleaning mechanism comprises a cleaning plate and a sealing plate. Electric heating rods are fixedly arranged between the cleaning plate and the sealing plate in a matrix mode. Water vapor generated by heating can be discharged through the arranged exhaust pipe, danger caused by pressure increase in the box body is avoided, meanwhile, the exhaust pipe is arranged in the preheating box, a liquid drying agent in the preheating box can be preheated, and energy is conveniently saved; and a screw rod can be rotationally adjusted through a servo motor, a rotating rod and a bevel gear set, the cleaning plate can be driven to move in the heating bin through the threaded connection effect of the screw rod and the cleaning plate, the dried drying agent is conveniently discharged from the interior of the heating bin, and therefore the drying efficiency of the drying agent is improved.