36 results about "Liquid desiccant" patented technology

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 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.

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 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.

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.

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

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.

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 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.

The invention discloses an indirect evaporative cooling system based on solar heat collection and a liquid drying agent, belongs to the technical field of data centers, and aims to solve the technical problem of loss of an energy conversion chain caused by balance between independent temperature and humidity control requirements and regeneration energy consumption and insufficient gradient utilization of full spectrum of solar energy. Comprising a first-stage indirect evaporative cooler for dehumidifying and preliminarily cooling outdoor air, and a second-stage indirect evaporative cooler for cooling dry air output by the first-stage indirect evaporative cooler; the auxiliary cooling device is communicated with an air outlet channel of the secondary indirect evaporative cooler and provides auxiliary heat exchange for hot return air generated by the data center; the liquid desiccant regeneration device comprises a solar collector, a heat exchanger between a solar system and a heat storage system, a heat storage tank, a heat exchanger between the heat storage system and a desiccant system, a desiccant regenerator, a regenerator and an auxiliary heater.

According to the heatless solution dehumidification system, a low-concentration salt solution enters the bottom of a low-concentration solution tank, and the concentration of the low-concentration salt solution stored at the bottom of the low-concentration solution tank is detected through a first concentration meter in the low-concentration solution tank; according to the heatless solution dehumidification system provided by the utility model, the low-concentration pipeline pumps out the low-concentration salt solution and guides the low-concentration salt solution into the separator, the low-concentration salt solution is converted into the high-concentration salt solution and then is input into the high-concentration solution tank, and the concentration of the solution is monitored through the second concentration meter; heating and cooling of the salt solution are omitted through the separator, energy consumption is reduced, the bypass pipeline is connected between the output end of the low-concentration pipeline and the high-concentration solution tank in a communicating mode, the low-concentration electromagnetic valve is arranged on the bypass pipeline, and the specific concentration of the high-concentration salt solution in the high-concentration solution tank can be adjusted by adjusting the opening degree of the low-concentration electromagnetic valve.

Systems and methods for adjusting airflow are described herein. In some embodiments, the system may include an absorber and a desorber. The absorber is configured to receive a supply airflow containing moisture at a first moisture concentration, expose it to a liquid desiccant to remove moisture from the supply airflow, and generate an adjusted airflow. The desorber is configured to receive a regenerated flow and at least a portion of the liquid desiccant from the absorber at a first mass flow rate and having at least one salt in a first weight percent. The desorber includes an array of emitters configured to direct a portion of the liquid desiccant into a desorber medium at a second mass flow rate to facilitate the removal of moisture from the portion of the liquid desiccant and to generate a concentrated liquid desiccant having at least one salt in a second weight percent.

The invention provides a fiber composite membrane material with humidification and dehumidification functions and a preparation method and application thereof, and belongs to the technical field of composite membrane materials.The fiber composite membrane material comprises non-woven fabric made of polyester fibers and a drying agent, and the polyester fibers are porous polyester staple fibers; the drying agent is uniformly loaded and stably fixed on the surface of the porous polyester fiber, the inner wall of the porous structure and in fiber gaps of the non-woven fabric. According to the fiber composite membrane material, the non-woven fabric made of the polyester fibers of the porous structure serves as a base material, the porous structure enables liquid water to be rapidly diffused, the low hygroscopicity of the polyester is combined, the liquid water is easy to desorb, and the humidification rate is increased; meanwhile, the porous structure of the porous polyester fiber serves as a loading site of the drying agent, leakage of the liquid drying agent is prevented while efficient dehumidification is achieved, the stability of the base body non-woven fabric material can be improved through the coated porous polymeric membrane, and the porous polymeric membrane can also serve as a second barrier for preventing leakage of the liquid drying agent; therefore, the fiber composite membrane material has humidifying and dehumidifying functions.

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.

Systems and methods for conditioning airflow are described herein. In some embodiments, a system may include an absorber and a desorber. The absorber is configured to receive and expose a supply airflow containing moisture at a first moisture concentration to a liquid desiccant to remove moisture from the supply airflow and produce a conditioned airflow. The desorber is 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 in a first weight percent. The desorber includes an emitter array configured to direct the portion of the liquid desiccant to a desorber medium at a second mass flow rate, to facilitate removal of moisture from the portion of the liquid desiccant and produce a concentrated liquid desiccant having the at least one salt in a second weight percent.

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 tank containing LD, a contact media device including media for being disposed in an air stream to be dehumidified and a sump disposed below the media to receive the LD drained from the media, a pump and valve system for pumping the LD from the tank to the contact media device to wet the media and from the sump to the tank, a heat exchanger through which the LD pumped from the sump to the tank flows, a sensing system for sensing one or more conditions of the LD, and a controller for controlling the pump and valve system in accordance with system status and the one or more conditions of the LD.

The present invention relates to a device for absorbing water using a liquid desiccant and the regeneration of said liquid desiccant by evaporating the absorbed water. The device may further be used in an air cooler. The invention also relates to a method for controlling a device for absorbing water.

The invention relates to a mass transfer assembly for a heating ventilation and cooling system. In some examples, a mass transfer apparatus includes a stack of plates, where the stack defines pairs of channels, and each pair of channels has one conditioning channel and one discharge channel. An upstream edge of the conditioning channel and a downstream edge of the discharge channel define an upstream portion of the stack and extend laterally. In addition, the mass transfer device is adapted to supply a fluid supply stream to the conditioning channel and to supply a first portion of the conditioned fluid supply stream to the discharge channel. For each channel pair, an opening portion of an upstream edge of the conditioning channel is open for receiving a fluid supply flow, and an opening portion of a downstream edge of the discharge channel is open for discharging the conditioned fluid supply flow.

The invention relates to a control system for a heating ventilation and cooling system. In some examples, a controller for heating a ventilation and cooling system receives a first temperature of a first airflow entering a regulator system from a first temperature sensor. The controller also receives a first dew point of the first airflow from the first humidity sensor and also receives a desired temperature for the conditioned space from the thermostat. The controller generates adjustment data based on at least one of the first temperature, the first dew point, and the desired temperature, the adjustment data characterizing an adjustment to at least one of (1) an exhaust air flow, (2) a desiccant flow rate, (3) a water flow rate, (4) a total air flow rate, and (5) a liquid desiccant concentration of the regulator system. The controller transmits the adjustment data to the regulator system to cause the adjustment.

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 system and a method for controlling water content and temperature of an air stream. Said system comprises 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 device (13) which can be operated in at least a first and a second mode, wherein the first mode is a desiccant regeneration mode in which water is removed from the liquid desiccant (5) and the second mode is a desiccant heating mode in which the liquid desiccant is heated to a desired temperature below boiling point. The system comprises further a control system (22) configured for controlling the regeneration device (13) to operate in the first mode when the system (1) is used for dehumidifying the air stream (7) and to operate in the second mode when the system (1) is used for humidifying the air stream.

Air flows across the gas-liquid interface, and the liquid desiccant flowing through the interface absorbs water from the air, thereby diluting it and forming an output stream. The output stream circulates through an electrodialysis stack having a central ion exchange membrane and first and second outer ion exchange membranes. A redox shuttle loop circulates around the first and second outer ion exchange membranes. A voltage is applied to the electrodialysis stack, thereby regenerating the liquid desiccant.

The present invention provides solar-driven deep dehumidification system and method utilizing spectrum splitting of sunlight. The system comprises: multiple air dehumidification modules; and a solar energy conversion module configured to covert solar energy into thermal energy and electrical energy for driving the multiple air dehumidification modules. The multiple air dehumidification modules comprise: a liquid desiccant dehumidification module configured to configured to dehumidify a flow of air using a liquid desiccant to supply a flow of dehumidified air; and a vacuum membrane dehumidification module configured to configured to further dehumidify the flow of dehumidified air from the liquid desiccant dehumidification module to supply a flow deep-dehumidified air. The proposed systems pave a way for clean and sustainable deep dehumidification.

The invention relates to a modified fiber composite non-woven fabric for dehumidification and a preparation method thereof, the modified fiber composite non-woven fabric structurally comprises a core moisture absorption layer, an anti-leakage layer for clamping the core moisture absorption layer and a PET non-woven fabric layer on the outermost layer, the core moisture absorption layer is a composite non-woven fabric A loaded with a drying agent, the composite non-woven fabric A is formed by compounding porous PET fibers and cellulosic fibers, and the composite non-woven fabric A is a composite non-woven fabric B loaded with a drying agent. And the anti-leakage layer is formed by compounding PET (Polyethylene Terephthalate) fibers and superabsorbent fibers. The core moisture absorption layer is used for adsorbing gaseous water molecules when water-containing air permeates, and the anti-leakage layer is used for preventing leakage of a liquid drying agent after moisture absorption of the core moisture absorption layer. The invention has the following advantages: through compounding of the liquid drying agent and the solid drying agent and combination of the anti-leakage layer composed of the super absorbent fibers, through multiple ways, leakage of the inorganic salt liquid drying agent can be effectively prevented; through compounding of multiple layers of non-woven fabrics with different gram weights and different compositions, each layer has different functions, and the gas permeability of the composite non-woven fabric can be ensured while efficient moisture absorption and drying are ensured.

The present disclosure includes a dehumidification unit (1) that absorbs and removes moisture from the air by bringing air into direct contact with a liquid desiccant; The dehumidification unit (1) includes a regeneration unit (100) that removes moisture from the liquid desiccant used in the dehumidification unit (1) to restore the concentration of the liquid desiccant; wherein the dehumidification unit (1) comprises a pump tank (10) in which the liquid desiccant is stored, a dehumidification tank (50) formed with an indoor intake port (51) for drawing in indoor air and an indoor discharge port (52) for discharging dehumidified air into the indoor space, a nozzle (30) disposed in the dehumidification tank (50) for discharging the liquid desiccant, a main pump (20) for pumping the liquid desiccant from the pump tank (10) to the nozzle (30), an indoor blower fan (70) for circulating indoor air by flowing the air in the dehumidification tank (50), a main filling member (60) disposed in the dehumidification tank (50) for absorbing the liquid desiccant sprayed from the nozzle (30), and the main pump (20). The present invention relates to a liquid desiccant air conditioning device characterized by improving the contact efficiency between the liquid desiccant and air by including a main cooler (80) disposed between nozzles (30) and cooling the liquid desiccant discharged from the main pump (20), and further including a piezoelectric module (200) that provides vibration to the main filling member (60).

A plate assembly is provided that includes a first plate having a first side defining a side of a conditioning channel, and a second side, opposite the first side, defining a side of an exhaust channel; and wicking material adjacent the first side of the first plate, the wicking material comprising a surface comprising a plurality of surface features.