REFRIGERATION SYSTEM WITH ADIABATIC ELECTROSTATIC COOLING DEVICE

Abstract

An evaporative cooling device for a refrigeration system includes one or more heat exchanger coils, a first humidity panel, a second humidity panel, a first nozzle arrangement, a second nozzle arrangement, a humidity sensor, and a controller; the first humidity panel and the second humidity panel are separated by a distance and arranged externally to the one or more heat exchanger coils; the first nozzle arrangement is arranged externally to the first humidity panel, and the second nozzle arrangement is arranged externally to the second humidity panel; the first nozzle arrangement and the second nozzle arrangement are configured to provide an atomized spray of electrostatically charged droplets; the humidity sensor is configured to provide a signal representative of a humidity level;The controller is configured to receive the signal representing the humidity level and control a water supply.

Description

REFRIGERATION SYSTEM WITH ADIABATIC ELECTROSTATIC COOLING DEVICE FIELD OF INVENTION This application generally relates to a refrigeration system with an adiabatic electrostatic cooling device, such as a gas cooler, fluid cooler, or condenser. BACKGROUND OF THE INVENTION Refrigeration systems are often used to provide cooling to temperature-controlled display devices (e.g., display cases, counters, etc.) in supermarkets and similar establishments. Vapor-compression refrigeration systems are a type of refrigeration system that provides cooling by circulating a refrigerant fluid (e.g., a liquid and / or vapor) through a thermodynamic vapor-compression cycle.In a vapor compression cycle, the refrigerant is typically (1) compressed to a high temperature / pressure state (e.g., by a refrigeration system compressor), (2) cooled / condensed to a lower temperature state (e.g., in a gas cooler or condenser that absorbs heat from the refrigerant), (3) expanded to a lower pressure (e.g., through an expansion valve), and (4) evaporated to provide cooling by absorbing heat into the refrigerant. BRIEF DESCRIPTION OF THE INVENTION At least one aspect of the present description pertains to an evaporative cooling device for a refrigeration system. The system includes one or more heat exchanger coils. The system includes a first humidity panel arranged external to the one or more heat exchanger coils. The system includes a second humidity panel arranged external to the one or more heat exchanger coils. The second humidity panel is separated from the first humidity panel by a distance. The system includes a first nozzle arrangement arranged external to the first humidity panel and configured to provide an atomized spray of electrostatically charged droplets toward the first humidity panel. The system includes a second nozzle arrangement arranged external to the second humidity panel and configured to provide an atomized spray of electrostatically charged droplets toward the second humidity panel. RI Cb ίη / 77P7 / E / YILI humidity. The system includes a humidity sensor configured to provide a representative humidity level signal from at least one of the first or second humidity panels. The system includes a controller communicatively coupled to the humidity sensor. The controller is configured to receive the representative humidity level signal from at least one of the first or second humidity panels. The controller is configured to control a water supply to at least one of the first or second humidity panels in response to the representative humidity level signal. Another aspect of this description pertains to a CO2 refrigeration system with an adiabatic gas cooler and electrostatically charged cooling spray. The CO2 refrigeration system includes a CO2 refrigerant circuit comprising an evaporator, a compressor, a gas cooler, a receiver, and an expansion valve. The gas cooler includes one or more cooling coils. The gas cooler includes one or more humidity pads adjacent to the cooling coils. The gas cooler includes one or more spray nozzles configured to moisten the humidity pads with electrostatically charged water droplets. The gas cooler includes a humidity sensor associated with the humidity pads. The humidity sensor is operable to provide a signal representative of the humidity level of the humidity pads. The gas cooler includes a controller.The controller is configured to receive a signal representing the humidity level from one or more humidity pads. The controller is configured to control the water supply to the one or more humidity pads in response to this signal. Another aspect of the present description is directed to a method for providing an evaporative cooling device for a refrigeration system. The method includes providing one or more heat exchanger coils. The method includes installing a first humidity panel external to the one or more heat exchanger coils. The method includes installing a second humidity panel external to the one or more heat exchanger coils. The second humidity panel is separated from the first humidity panel by a distance. The method includes installing a first nozzle arrangement external to the first humidity panel. The method includes configuring the first nozzle arrangement to provide an atomized spray of electrostatically charged droplets toward the first humidity panel. The method includes installing a second nozzle arrangement external to the second humidity panel.The method includes configuring the second nozzle arrangement to provide an atomized spray of electrostatically charged droplets toward the second humidity panel. The method includes configuring a humidity sensor to provide a signal representative of a humidity level from at least one of the first or second humidity panels. The method includes providing a coupled controller. RI Cfr ίη / ZZΖΠZ / E / YΙΛΙ in a communicative manner to the humidity sensor. The method includes receiving, by the controller, the signal representing the humidity level from at least one of the first humidity panel or the second humidity panel. The method includes controlling, by the controller, a water supply to at least one of the first humidity panel or the second humidity panel in response to the signal representing the humidity level. Those skilled in the art will appreciate that this summary is illustrative only and is not intended to be limiting in any way. Other aspects, inventive features, and advantages of the devices and / or processes described herein, as defined solely by the claims, will become apparent from the detailed description set forth herein and taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS Details of one or more implementations of the material described in this specification are set out in the accompanying drawings and the description below. Other features, aspects, and advantages of the material will become apparent from the description, drawings, and claims. FIG. 1 is a schematic representation of a CO2 refrigeration system having a CO2 refrigeration circuit, a receiving tank for containing a liquid and vapor CO2 refrigerant mixture, and a gas bypass valve fluidly connected to the receiving tank for controlling a pressure within the receiving tank, in accordance with an exemplary embodiment. FIG. 2 is a schematic representation of an adiabatic gas cooler according to an exemplary embodiment. FIG. 3 is a schematic representation of a cross-section of an adiabatic gas cooler, in accordance with an exemplary embodiment. FIG. 4 is a schematic representation of an atomized aerosol of electrostatically charged droplets, in accordance with an exemplary embodiment. FIG. 5 is a block diagram of an exemplary method for providing an evaporative gas cooler for a refrigeration system, in accordance with an exemplary embodiment. FIG. 6 is a block diagram of an exemplary method of operating an adiabatic gas cooler, in accordance with an exemplary modality. Reference numbers and similar designations on the various drawings indicate similar elements. RI Cb ίη / 77Π7 / E / YΙΛΙ DETAILED DESCRIPTION OF THE INVENTION Further detailed descriptions of various concepts related to, and modalities of, methods and apparatus for providing cooling using an evaporative cooling device are provided later. The various concepts introduced above and discussed in greater detail below can be implemented in any number of ways, as the concepts described are not limited to any particular method of implementation. Examples of specific implementations and applications are provided primarily for illustrative purposes. I. Overview Providing a cooling solution to an object, such as a temperature-controlled enclosure, is frequently done to store products, such as refrigerated or frozen goods. In some applications, the object is cooled by a cooling system that circulates a refrigerant through a circuit and includes a gas chiller to cool or condense a high-temperature refrigerant. The gas chiller may include heat exchange coils and humidity pads. The humidity pads can be moistened by a device that drips water downwards through them. In some situations, cooling systems generate excess water that runs off the humidity pads. This water may drain or be recirculated back to the drip emitters on top of the pads. For example, water flowing through the humidity pads may not be fully absorbed or may evaporate due to the airflow drawn through them. As a result, the amount of water needed to properly humidify the pads and provide sufficient cooling may require excess water to flow through them.In another situation, spraying water droplets onto the moisture pads can cause water to leak through the moisture pad, which decreases efficiency and creates excess runoff, which can result in coil saturation, leading to the formation of scale, corrosive materials, etc. Implementations described herein relate to a cooling device for a refrigeration system. The cooling device includes a water supply line feeding electrostatic spray nozzles that atomize water droplets and electrostatically charge them. Electrostatically charging the droplets can provide improved moisture pad coverage and water retention, as the droplets are attracted to oppositely charged moisture pads. RI Cb ίη / 77Π7 / E / YΙΛΙ Cooling device may include a moisture sensing element which provides a feedback signal to a variable flow rate control device in the water supply line to the nozzles to minimize water usage and runoff. II. Example of an Adiabatic Gas Cooler With reference to the FIGURES, the refrigeration system is shown by way of examples as a CO2 refrigeration system and its components, according to various exemplary embodiments. The CO2 refrigeration system may be a vapor-compression refrigeration system that primarily uses carbon dioxide (i.e., CO2) as a refrigerant. In some implementations, the CO2 refrigeration system may be used to provide cooling for temperature-controlled display devices in a supermarket or other similar facility. The CO2 refrigeration system may include a CO2 refrigerant circuit. The CO2 refrigerant circuit may include evaporators, low-temperature (LT) and medium-temperature (MT) compressors, gas coolers, a receiver, and expansion valves.The CO2 refrigerant circuit can be configured to circulate CO2 as a refrigerant to provide cooling to the evaporators. In some configurations, the CO2 refrigeration system includes a receiver tank (e.g., a vent tank, a refrigerant tank, etc.) containing a mixture of liquid CO2 and CO2 vapor, a gas bypass valve, and a parallel compressor. The gas bypass valve may be arranged in series with one or more medium-temperature (MT) compressors of the CO2 refrigeration system. The gas bypass valve provides a mechanism for controlling the pressure of the CO2 refrigerant within the receiver tank by venting excess CO2 vapor to the suction side of the MT compressors of the CO2 refrigeration system. The parallel compressor may be arranged in parallel with both the gas bypass valve and other compressors of the CO2 refrigeration system. The parallel compressor provides an alternative or supplementary means of controlling the pressure within the receiver tank. Advantageously, the CO2 refrigeration system includes a controller to monitor and control the pressure, temperature, and / or flow of the CO2 refrigerant throughout the system. The controller can operate both the gas bypass valve and the compressor in parallel (e.g., in accordance with the various control procedures described herein) to effectively regulate the CO2 refrigerant pressure within the receiving tank. Furthermore, the controller can interface with other instruments associated with the CO2 refrigeration system (e.g., measuring devices, timing devices, pressure sensors, temperature sensors, etc.) and provide appropriate control signals to a variety of operable components of the CO2 refrigeration system (e.g., compressors, valves, RI Cb ίη / 77P7 / E / YILI (power supplies, flow diverters, etc.) to regulate pressure, temperature, and / or flow at other locations within the CO2 refrigeration system. Advantageously, the controller can be used to facilitate the efficient operation of the CO2 refrigeration system, reduce energy consumption, and improve system performance. Before discussing further details of the CO2 cooling system and / or its components, it should be noted that references to front, back, rear, up, down, inside, outside, right, and left in this description are used simply to identify the various elements as they are oriented in the FIGURES. These terms are not intended to limit the element they describe, as the various elements may be oriented differently in various applications. It should also be noted that for the purposes of this description, the term "coupled" means the joining of two members directly or indirectly to one another. Such a joining may be stationary or movable in nature and / or may permit the flow of fluids, the transmission of forces, electrical signals, or other types of signals or communication between the two members. Such a joining may be achieved with the two members, or the two members and any additional intermediate members, integrally formed as a single unit, or with the two members, or the two members and any additional intermediate members, joined together. Such a joining may be permanent in nature or, alternatively, may be removable or detachable. Referring now to FIG. 1, a CO2 refrigeration system 100 is shown in accordance with one exemplary embodiment. According to other embodiments, the refrigeration system can be configured to use other refrigerants, such as hydrofluorocarbons, ammonia, etc., and cooling devices such as condensers, fluid coolers, etc. Refrigeration system 100 can be a vapor-compression refrigeration system which primarily uses carbon dioxide as a refrigerant. The CO2 refrigeration system 100 is shown including a system of pipes, ducts, or other fluid channels (e.g., fluid ducts 1, 3, 5, 7, and 9) for transporting the carbon dioxide between the various thermodynamic components of the refrigeration system.The thermodynamic components of the CO2100 refrigeration system are shown to include a gas cooler / condenser 2, a high pressure valve 4, a receiving tank 6, a gas bypass valve 8, a portion of the medium temperature (MT) system 10 and a portion of the low temperature (LT) system 20. The gas cooler / condenser 2 may be a heat exchanger, fan-coil unit, or other similar device for removing heat from the CO2 refrigerant. In accordance with other embodiments that may use different refrigerants, the gas cooler / condenser may be a fluidized bed chiller or condensing unit. RI Cb iη / 77P7 / E / YILI Gas cooler / condenser 2 is shown receiving CO2 vapor from fluid line 1. In some embodiments, the CO2 vapor in fluid line 1 may have a pressure within a range of approximately 4500 kPa (45 bar) to approximately 10000 kPa (100 bar) (i.e., approximately 640 psig to approximately 1420 psig), depending on the ambient temperature and other operating conditions. In some embodiments, cooler / condenser 2 may partially or completely condense the CO2 vapor to liquid CO2 (e.g., if the system is operating in a subcritical region). The condensation process may result in either fully saturated liquid CO2 or a liquid-vapor mixture (e.g., having a thermodynamic quality between 0 and 1).In other embodiments, the gas cooler / condenser 2 can cool the CO2 vapor (for example, by removing superheat) without condensing the CO2 vapor to liquid CO2 (for example, if the system is operating in a supercritical region). In some embodiments, the cooling / condensation process is isobaric. The cooler / condenser 2 is shown discharging the cooled and / or condensed CO2 refrigerant to fluid line 3. The gas cooler / condenser 2 may include the evaporative gas cooler described herein. The high-pressure valve 4 receives the cooled and / or condensed CO2 refrigerant from fluid line 3 and discharges the CO2 refrigerant to fluid line 5. The high-pressure valve 4 can control the pressure of the CO2 refrigerant in the gas cooler / condenser 2 by controlling the amount of CO2 refrigerant allowed to pass through it. In some embodiments, the high-pressure valve 4 is a high-pressure thermal expansion valve (for example, if the pressure in fluid line 3 is higher than the pressure in fluid line 5). In such embodiments, the high-pressure valve 4 can allow the CO2 refrigerant to expand to a lower pressure state. The expansion process can be isenthalpic and / or adiabatic, resulting in the instantaneous evaporation of the high-pressure CO2 refrigerant to a lower pressure and temperature state.The expansion process can produce a liquid / vapor mixture (e.g., having a thermodynamic vapor quality between 0 and 1). In some embodiments, the CO2 refrigerant expands to a pressure of approximately 3800 kPa (38 bar) (e.g., approximately 3792 kPa (37.92 bar) (540 psig)), corresponding to a temperature of approximately 2.7 °C (37 °F). The CO2 refrigerant then flows from fluid line 5 to the receiving tank 6. The receiving tank 6 (e.g., receiver, receiving tank, etc.) collects the CO2 refrigerant from the fluid line 5. In some embodiments, the receiving tank 6 may be an evaporation tank or another fluid reservoir. The receiving tank 6 contains a portion of liquid CO2 and a portion of CO2 vapor and may contain a partially mixed mixture. RI Cb ίη / 77P7 / E / YILI saturated with liquid CO2 and CO2 vapor. In some embodiments, the receiving tank 6 separates the liquid CO2 from the vapor CO2. The liquid CO2 can exit the receiving tank 6 through fluid conduits 9. The fluid conduits 9 can be liquid manifolds leading to either subsystem MT 10 or subsystem LT 20. The vapor CO2 can exit the receiving tank 6 through fluid conduit 7. Fluid conduit 7 is shown leading the vapor CO2 through gas shutoff valve 8. The gas shut-off valve 8 is shown receiving CO2 vapor from fluid line 7 and sending the CO2 refrigerant to the MT subsystem 10. In some embodiments, the gas shut-off valve 8 can be operated to regulate or control the pressure within the receiver 6 (for example, by adjusting the amount of CO2 refrigerant allowed to pass through the gas shut-off valve 8). For example, the gas shut-off valve 8 can be adjusted (e.g., variably open or closed) to adjust the mass flow rate, volumetric flow rate, or other flow rates of the CO2 refrigerant through the gas shut-off valve 8. The gas shut-off valve 8 can be opened and closed (e.g., manually, automatically, by means of a controller, etc.) as required to regulate the pressure within the receiver 6. In some embodiments, the gas bypass valve 8 includes a sensor for measuring a flow rate (e.g., mass flow rate, volumetric flow rate, etc.) of the CO2 refrigerant through the gas bypass valve 8. In other embodiments, the gas bypass valve 8 includes an indicator (e.g., a pressure gauge, a marker, etc.) from which the position of the gas bypass valve 8 can be determined. This position can then be used to determine the flow rate of CO2 refrigerant through the gas bypass valve 8, as these quantities may be proportional or otherwise related. In some embodiments, the gas shutoff valve 8 may be a thermal expansion valve (for example, if the pressure downstream of the gas shutoff valve 8 is lower than the pressure in the fluid line 7). In one embodiment, the pressure inside the receiving tank 6 is regulated by the gas shutoff valve 8 to approximately 3800 kPa (38 bar), which corresponds to approximately 2.7°C (37°F). Advantageously, this pressure / temperature state can facilitate the use of copper piping for the CO2 lines downstream of the system. Furthermore, this pressure / temperature state can allow such copper piping to operate in a substantially frost-free manner. Referring to Figure 1, the MT 10 subsystem includes one or more expansion valves 11, one or more MT 12 evaporators, and one or more MT 14 compressors. In various configurations, any number of expansion valves 11, MT evaporators, and MT compressors 14 may be present. The expansion valves 11 may be electronic expansion valves or other similar expansion devices. The expansion valves 11 are Figures RI Cb ίη / ZZΖΠZ / E / YΙΛΙ show the receiving of liquid CO2 refrigerant from fluid line 9 and the outlet of CO2 refrigerant to MT evaporators 12. The expansion valves 11 can cause the CO2 refrigerant to undergo a rapid pressure drop, thereby expanding the CO2 refrigerant to a lower pressure and temperature state. In other embodiments, the expansion valves 11 expand the CO2 refrigerant to a pressure of approximately 30 bar. The expansion process can be isenthalpic and / or adiabatic. The MT 12 evaporators are shown receiving the cooled and expanded CO2 refrigerant from the expansion valves 11. In some configurations, the MT 110 evaporators may be connected to display cases / display devices (for example, if the CO2 refrigeration system 100 is implemented in a supermarket). The MT 12 evaporators can be configured to facilitate heat transfer from the display cases / display devices to the CO2 refrigerant. The added heat may cause the CO2 refrigerant to partially or completely evaporate. In one configuration, the CO2 refrigerant is fully evaporated in the MT 12 evaporators. In some configurations, the evaporation process may be isobaric. The MT 12 evaporators are shown discharging the CO2 refrigerant through the fluid lines 13, leading to the MT 14 compressors. The MT 14 compressors compress CO2 refrigerant into a superheated vapor with a pressure ranging from approximately 4500 kPa (45 bar) to approximately 10000 kPa (100 bar). The outlet pressure of the MT 14 compressors can vary depending on the ambient temperature and other operating conditions. In some configurations, the MT 14 compressors operate in transcritical mode. During operation, the CO2 discharge gas exits the MT 14 compressors and flows through fluid line 1 to the gas cooler / condenser 2. Still referring to FIG. 1, it is shown that the LT 20 subsystem includes one or more expansion valves 21, one or more evaporators LT 22 and one or more compressors LT 24. In various configurations, any number of expansion valves 21, evaporators LT 22, and compressors LT 24 may be present. In some configurations, the LT 20 subsystem may be omitted, and the CO2 refrigeration system 100 may operate with an air conditioning (AC) module that interfaces only with the MT 10 subsystem. The expansion valves 21 can be electronic expansion valves or other similar expansion valves. The expansion valves 21 are shown receiving liquid CO2 refrigerant from fluid line 9 and discharging CO2 refrigerant to the evaporators LT 22. The expansion valves 21 can cause the CO2 refrigerant to undergo a rapid pressure drop, thereby expanding the CO2 refrigerant to a lower pressure and temperature state. The expansion procedure can be an expansion process. RI Cb ίη / 77Π7 / E / YΙΛΙ of heat exchanger 205 by a fan. According to one embodiment, the gas cooler 200 may include a plurality of heat exchanger coils 205. The heat exchanger coil 205 may be arranged in a V shape. To improve the cooling efficiency of the heat exchanger coils 205, the gas cooler 200 may include one or more humidity panels, such as a first humidity panel 210 and a second humidity panel 215. The first humidity panel 210 (e.g., first adiabatic panel, first adiabatic pad, first adiabatic humidity pad, first humidity pad, first cooling pad, etc.) may be arranged externally to the heat exchanger coils 205. The first humidity panel 210 may be used to generate pre-cooled air through an evaporative cooling process. For example, ambient air may pass through the first humidity panel 210 before passing through the heat exchanger coils 205.As ambient air passes through the first humidity pad 210, it cools because the moisture in the first humidity pad 210 evaporates and becomes pre-cooled air. The gas cooler 200 may include one or more humidity pads adjacent to one or more cooling coils. For example, a plurality of humidity pads may be arranged adjacent to a plurality of cooling coils. According to the embodiment illustrated in FIG. 2, the first humidity pad 210 is arranged outward and co-extensively with each heat exchanger coil 205. The first humidity pad 210 can provide an evaporative cooling effect when air is drawn through it. The first humidity pad 210 can increase the cooling efficiency of the heat exchanger coils 205. Furthermore, the gas cooler 200 may include a second humidity panel 215 (e.g., second adiabatic panel, second adiabatic pad, second adiabatic humidity pad, second humidity pad, second cooling pad, etc.) arranged externally to the heat exchanger coils 205. The second humidity panel 215 can be used to generate pre-cooled air through an evaporative cooling process. For example, ambient air may pass through the second humidity panel 215 before passing through the heat exchanger coils 205. As the ambient air passes through the second humidity panel 215, it is cooled because the moisture in the second humidity panel 215 evaporates, becoming pre-cooled air. This is in accordance with the illustrated embodiment in FIG.2. The second humidity panel 215 is arranged outwards and coextensively with each heat exchanger coil 205. The second humidity panel 215 can provide an evaporative cooling effect when air is drawn through the second humidity panel 215. The second humidity panel 215 can increase the cooling efficiency of the heat exchanger coils 205. RI Cb ίη / ΖΖΠΖ / Ε / ΥΙΛΙ The second humidity panel 215 can be separated from the first humidity panel 210 by a distance of 220. For example, the first humidity panel 210 can be separated from the second humidity panel 215 by a distance of 220 at the base of the first humidity panel 210 and the base of the second humidity panel 215. The first humidity panel 210 can be separated from the second humidity panel 215 by a distance of 220 at the center of the first humidity panel 210 and the center of the second humidity panel 215. The first humidity panel 210 can be separated from the second humidity panel 215 by a distance of 220 at the top of the first humidity panel 210 and the top of the second humidity panel 215. The gas cooler 200 may also include one or more fans 225. The fans 225 draw ambient or pre-cooled air through the heat exchanger coils 205, thereby cooling and condensing the refrigerant and providing cooling to the CO2 refrigeration system 100. The gas cooler 200 may include one or more motors that power the fans 225. The fans 225 draw air through the humidity panels and subsequently through the heat exchanger coils 205. The fans 225 are shown positioned above the heat exchanger coils 205. The first humidity panel 210 can provide an evaporative cooling effect to the heat exchanger coil 205 when air is drawn through the first humidity panel 210 by the fans 225.The second humidity panel 215 can provide an evaporative cooling effect to the heat exchanger coil 205 when air is drawn through the second humidity panel 215 by the fans 225. Referring now to FIG. 3, a cross-section 300 of a gas cooler 200 is shown in accordance with an exemplary embodiment. The gas cooler 200 may include a first nozzle arrangement 310 (e.g., a first water spray nozzle arrangement, one or more spray nozzles, etc.). The first nozzle arrangement 310 may be arranged external to the first humidity panel 210. For example, the first nozzle arrangement 310 may be located on the outside of the first humidity panel 210. The first nozzle arrangement 310 may be configured to provide an atomized spray of electrostatically charged water droplets toward the first humidity panel 210. The atomized spray of electrostatically charged water droplets and the first humidity panel 210 are oppositely charged. For example, the first nozzle arrangement 310 may include nozzles, each of which may include a cylinder.An electrical charge can be applied to the cylinder of each nozzle, which then applies a charge to the fluid (e.g., water) and / or water droplets. As the fluid is propelled through the nozzle, the water gains an electrical charge. For example, the nozzle cylinder can transfer a negative charge to the droplets (e.g., water droplets, etc.). The first moisture panel 210 can be positively charged (or grounded) to create a force. RI Cb ίη / 77P7 / E / YΙΛΙ attraction towards droplets. The first positively charged humidity panel 210 can create an attraction towards negatively charged droplets. Alternatively, the nozzle cylinder can transfer a positive charge to the droplets (e.g., water droplets, etc.) and the first humidity panel 210 can be negatively charged (or grounded). The first negatively charged humidity panel 210 can then create an attraction towards positively charged droplets. Droplets electrostatically sprayed onto the first humidity panel 210 can allow more water to settle onto the charged first humidity panel 210. The electrostatically sprayed droplets onto the first moisture panel 210 can allow more water to be retained by the first moisture panel 210. Due to the charge, when the water leaves the nozzle, the water 2 is attracted to the first moisture panel 210 and sticks (e.g., moistens, adheres, etc.).) to the first moisture panel 210. The attraction improves the coverage of the moisture panels and minimizes dry spots. The attraction also improves water efficiency by more effectively covering the surface, resulting in less water usage. The attraction further reduces moisture leakage through the moisture pads. For example, the electrostatic attraction of the atomized spray of electrostatically charged droplets to the moisture panels substantially prevents droplet leakage beyond a surface within the moisture panel. The gas cooler 200 may include a second nozzle assembly 315 (e.g., a second water spray nozzle assembly, one or more spray nozzles, etc.). The second nozzle assembly 315 may be arranged external to the second humidity panel 215. For example, the second nozzle assembly 315 may be located on the outside of the second humidity panel 215. The second nozzle assembly 315 may be configured to provide an atomized spray of electrostatically charged water droplets toward the second humidity panel 215. The atomized spray of electrostatically charged water droplets and the second humidity panel 215 are oppositely charged. For example, the second nozzle assembly 315 may include nozzles, each of which may include a cylinder. An electrical charge may be applied to the cylinder of each nozzle, which applies a charge to the fluid (e.g., water) and / or water droplets.As the fluid is propelled through the nozzle, the water acquires an electrical charge. For example, the nozzle cylinder can transfer a negative charge to the droplets (e.g., water droplets). The second humidity panel 215 can be positively charged (or grounded) to create an attractive force toward the droplets. The positively charged second humidity panel 215 can create an attraction toward the negatively charged droplets. Alternatively, the nozzle cylinder can transfer a positive charge to the droplets (e.g., water droplets), and the second humidity panel 215 can be negatively charged (or grounded). The negatively charged second humidity panel 215. RI Cb ίη / 77P7 / E / YΙΛΙ can create an attraction to positively charged droplets. Electrostatically sprayed droplets onto the second humidity panel 215 can allow more water to settle on the charged second humidity panel 215. Electrostatically sprayed droplets onto the first humidity panel 210 can allow more water to be retained by the second humidity panel 215. Due to the charge, when the water leaves the nozzle, it is attracted to the second humidity panel 215 and adheres to (e.g., moistens, adheres, etc.) the second humidity panel 215. In some embodiments, the first nozzle assembly 310 and the second nozzle assembly 315 form a single nozzle assembly. The gas chiller 200 can also include a humidity sensor 320. The humidity sensor 320 can be configured to provide a representative humidity level signal from at least one of the first humidity panel 210 and / or the second humidity panel 215. For example, the humidity sensor 320 can be configured to provide a representative humidity level signal from the first humidity panel 210. The humidity sensor 320 can also be configured to provide a representative humidity level signal from the second humidity panel 215. In some configurations, the humidity level is a first humidity level, and the humidity sensor is a first humidity sensor. The first humidity sensor can be configured to provide a signal representative of the first humidity level from the first humidity panel 210. In some configurations, the gas cooler 200 can include a second humidity sensor. The second humidity sensor can be configured to provide a signal representative of a second humidity level from the second humidity panel 215. The first humidity sensor can be configured to provide a signal representative of the first humidity level from one or more humidity pads. The second humidity sensor can be configured to provide a signal representative of a second humidity level from one or more humidity pads. In some configurations, the 320 humidity sensor can be configured to provide the humidity level signal from at least one of the undersides of the first humidity panel or the underside of the second humidity panel. For example, the 320 humidity sensor can be configured to provide the humidity level signal from the underside of the first humidity panel 210. The 320 humidity sensor can be configured to provide the humidity level signal from the underside of the second humidity panel 215. The 320 humidity sensor can be configured to provide the humidity level signal from the underside of one or more humidity pads. In some configurations, the 320 humidity sensor is configured to provide the signal RI Cb Ln / Zznz / E / YIAI representative of the humidity level from a drainage receptacle arranged below the first humidity panel and the second humidity panel. The gas chiller 200 can also include a controller 325. The controller 325 can be communicatively coupled with the humidity sensor 320. The controller 325 can be configured to receive the representative humidity level signal from at least one of the first humidity panel 210 or the second humidity panel 215. For example, the controller 325 can be configured to receive the representative humidity level signal from the first humidity panel 210 and the humidity level from the second humidity panel 215. In some configurations, the 325 controller can receive a signal representing the first humidity level and compare it to a reference value. For example, the reference value might represent a properly moistened first humidity pad (e.g., neither over-moistened nor under-moistened). The 325 controller can then determine whether the first humidity level is greater than, less than, or equal to the reference value. The 325 controller can also be configured to receive the signal representing the first humidity level from the first humidity pad. Furthermore, the 325 controller can receive a signal representing the first humidity level and determine whether the signal falls within a specified range (e.g., 2%, 5%, 10%, etc.) of a target humidity level. In some configurations, the 325 controller can receive a signal representing the second humidity level and compare it to a reference value. For example, the reference value might represent a properly humidified second humidity pad (e.g., neither over-humidified nor under-humidified). The 325 controller can then determine whether the second humidity level is greater than, less than, or equal to the reference value. The 325 controller can also be configured to receive the signal representing the second humidity level from the second humidity pad. Furthermore, the 325 controller can receive this signal and determine if it falls within a specified range (e.g., 2%, 5%, 10%, etc.) of a target humidity level. The 325 controller can be configured to control the water supply to at least one of the first 210 humidity panel or the second 215 humidity panel (e.g., individually or in combination) in response to a humidity level signal. For example, the 325 controller can be configured to collectively control the water supply to the first 210 humidity panel in response to a humidity level signal and to control the water supply to the second 215 humidity panel in response to a humidity level signal. For example, the 325 controller can decrease the water supply to one or more humidity pads in response to a signal that the humidity level is higher than a reference level. The 325 controller can decrease the The RI Cb Ln / Zznz / E / YIAI controller can supply water to one or more humidity pads in response to a signal that the humidity level in the pads exceeds the setpoint. The controller can increase the water supply to one or more humidity pads in response to a signal that the humidity level is lower than the setpoint. The controller can also withhold (e.g., maintain, hold constant, etc.) the water supply to the humidity pads in response to a signal that the pads are adequately humidified (e.g., neither over-humidified nor under-humidified). Individually, the 325 controller can be configured to control the water supply to the first humidity panel 210 in response to the signal representing the first humidity level. For example, the 325 controller can be configured to increase the water supply to the first humidity panel 210 when the humidity level falls below the setpoint. The 325 controller can be configured to decrease the water supply to the first humidity panel 210 when the humidity level rises above the setpoint. The 325 controller can be configured to maintain the water supply to the first humidity panel 210 when the humidity level remains equal to the setpoint. The 325 controller can be configured to control the water supply to the first humidity pad in response to the signal representing the first humidity level.The 325 controller can be configured to control the water supply to the first humidity pad in response to the signal representing both the first humidity level and the second humidity level. The 325 controller can also be configured to individually control the water supply to the second humidity panel 215 in response to the second humidity level signal. For example, the 325 controller can be configured to increase the water supply to the second humidity panel 215 when the second humidity level falls below the set point. The 325 controller can be configured to decrease the water supply to the second humidity panel 215 when the second humidity level rises above the set point. The 325 controller can be configured to maintain the water supply to the second humidity panel 215 when the second humidity level remains equal to the set point.The 325 controller can be configured to control the water supply to the second humidity pad in response to the signal representing the second humidity level. The 325 controller can also be configured to control the water supply to the second humidity pad in response to signals representing both the first and second humidity levels. The 325 controller can be configured to control the water supply using a 330 variable speed controller (e.g., flow control valve, etc.). For example, the 330 variable speed controller can adjust the droplet application rate to an optimal amount for each humidity panel or for a single humidity panel. For example, the 330 variable speed controller can provide a higher droplet application rate toward the first humidity panel 210 than toward the second humidity panel 215. The 330 variable speed controller can provide a higher droplet application rate toward the first humidity panel 210 than toward the second humidity panel 215 in response to a representative humidity level signal for the first humidity panel 210 being lower than a representative humidity level signal for the second humidity panel 215.The variable speed controller 330 can provide a higher droplet application rate to the first portion of the first humidity panel 210 than to the second portion of the first humidity panel 210. The variable speed controller 330 can provide a higher droplet application rate to the first portion of the first humidity panel 210 than to the second portion of the first humidity panel 210 in response to a representative humidity level signal for the first portion of the first humidity panel 210 being lower than a representative humidity level signal for the second portion of the first humidity panel 210. In some configurations, the 325 controller can be set to supply a voltage to the nozzles of the first 310 nozzle arrangement and the second 315 nozzle arrangement. The 325 controller can select the voltage to cause the first 310 nozzle arrangement and the second 315 nozzle arrangement to produce a target number of electrostatically charged droplets. The 325 controller can also select the voltage to cause one or more spray nozzles to produce a target number of electrostatically charged droplets. For example, the target number of electrostatically charged droplets may include a quantity that does not cause excess water to exit the first 210 humidity panel and the second 215 humidity panel. In some configurations, the 325 controller can be incorporated into a system-level control device (such as a condensing unit rack controller) that is configured to operate any or all of the other system components, such as the evaporator, compressor, gas cooler, receiver, and expansion valve. For example, the 325 controller can be configured to operate MT 12 evaporators. The 325 controller can be configured to operate LT 22 evaporators. The 325 controller can be coupled to operate MT 14 compressors. The 325 controller can be coupled to operate LT 24 compressors. The 325 controller can be configured to operate gas cooler / condenser 2. The 325 controller can be configured to operate gas cooler 200. The 325 controller can be coupled to operate receiving tank 6. The 325 controller can be coupled to RI Cb Ln / Zznz / E / YIAI operate expansion valves 11. Referring now to FIG. 4, a schematic representation 400 of an atomized aerosol of electrostatically charged droplets is shown in accordance with an exemplary embodiment. The first nozzle arrangement 310 and the second nozzle arrangement 315 each include a plurality of nozzles 405. The nozzles may include a liquid stream 410 (e.g., liquid line, etc.). The liquid stream may include a stream of liquid (e.g., water, etc.). The nozzle 405 may also include an air stream (e.g., air line, etc.). The air stream 415 may include an air stream. The air stream 415 may be a laminar air stream when the air is inside the nozzle 405, and may be a turbulent air stream when the air exits the nozzle 405. The liquid stream 410 and the air stream 415 can meet at the nozzle tip. For example, the low-pressure, high-volume airflow can atomize the liquid into droplets 420. The droplets 420 can be uniform in size. The droplets 420 can pass through an electric field. For example, an electrode 425 of the nozzle 405 can apply a charge (e.g., positive charge, negative charge, etc.) to the droplets 420. The droplets 420 can be directed toward a spray target 430 (e.g., first humidity panel 210, second humidity panel 215, etc.). The spray target 430 can have an opposite charge to that of the droplets 420. For example, the spray target 430 can have a positive charge, and the droplets 420 can have a negative charge. Alternatively, the 430 spray target can have a negative charge and the 420 droplets can have a positive charge.Charged droplets 420 are attracted to the oppositely charged spray target 430. Figure 5 is a block diagram of an exemplary method 500 for providing an evaporative gas cooler for a CO2 refrigeration system. In a similar manner, in accordance with other embodiments, an adiabatic evaporative cooler may be provided as a condenser or fluid cooler, etc., in a refrigeration system using other refrigerants, such as a hydrofluorocarbon or ammonia, etc. In brief, method 500 may include providing heat exchanger coils 505. Method 500 may include installing humidity panels 510. Method 500 may also include installing nozzle arrangements 515. Method 500 further includes configuring a humidity sensor 520 and providing a controller 525. Method 500 may also include receiving humidity level signals 530 and controlling a water supply 535. Method 500 may also include providing heat exchanger coils 505. The heat exchanger coil may include a microchannel coil, condenser coil, tube coil, cooling coil, or fin coil. Method 500 also includes installing moisture panels 510, such as a first RI Cb ίη / 77Π7 / E / YΙΛΙ external humidity panel towards the heat exchanger coil and a second external humidity panel towards and near the heat exchanger coils. Method 500 also includes installing nozzle arrangements 515, such as a first external nozzle arrangement facing the first moisture panel and a second external nozzle arrangement facing the second moisture panel. These nozzle arrangements provide an atomized spray of electrostatically charged droplets toward the moisture panels. Method 500 also includes installing a 520 humidity sensor to provide a representative signal of a humidity level from the first humidity panel and / or the second humidity panel (individually or combined). Method 500 also includes providing a 525 controller communicatively coupled to the humidity sensor. In some embodiments, Method 500 may include supplying, by the controller, a voltage to the first nozzle assembly and the second nozzle assembly. Method 500 may also include selecting, by the controller, the voltage to cause the first nozzle assembly and the second nozzle assembly to provide a target quantity of electrostatically charged droplets. Method 500 may include receiving humidity level signals 530. Receiving humidity level signals may include receiving, by the controller, the representative humidity level signal from the first humidity panel and / or the second humidity panel. Method 500 may include controlling a water supply 535. Controlling a water supply may include controlling, by the controller, a water supply to one or both of the first humidity panel or the second humidity panel in response to the representative humidity level signal. III. Exemplary Operation of the Adiabatic Gas Cooler Figure 6 is a block diagram of an exemplary method 600 for operating an adiabatic gas cooler. Method 600 can begin by receiving a signal from controller 325. The signal can represent a humidity level from one or more humidity panels, such as a signal representing a first humidity level from a first humidity panel and / or a signal representing a second humidity level from a second humidity panel. The signal can also represent a humidity level from both a first and a second humidity panel. Method 600 continues by determining, via controller 325, whether the humidity level is within a range (e.g., 2%, 5%, 10%, etc.) of a target humidity level 610. If controller 325 determines that the humidity level is within the range of the target humidity level, method 600 restarts (e.g., terminates and continues to block 605 again). RI Cb Ln / Zznz / E / YIAI etc.). If controller 325 determines that the humidity level is not within the target humidity range, method 600 continues in block 615 by having controller 325 determine if the humidity level is greater than the maximum value of the target range. If controller 325 determines that the humidity level is greater than the maximum value of the target range, method 600 continues in block 620 by having the controller decrease the water supply to the humidity panels. For example, a humidity level greater than the maximum value of the target range may indicate that the humidity panels are receiving excess moisture. Method 600 then restarts (e.g., terminates and continues to block 605 again, etc.). If controller 325 determines that the humidity level is not greater than the maximum value of the target range, method 600 continues in block 625 by increasing the water supply to the humidity panels. For example, if the humidity level is greater than the minimum value of the target range, it may indicate that the humidity panels are not receiving enough moisture. Method 600 then restarts (e.g., terminates and continues to block 605 again, etc.). IV. Construction of Exemplary Modalities The construction and arrangement of the elements of the CO2 refrigeration system with an adiabatic electrostatic gas cooler, as shown in the exemplary embodiments, are for illustrative purposes only. Although only a few embodiments have been described in detail herein, many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes, and proportions of the various elements, parameter values, mounting arrangements, use of materials, colors, orientations, etc.). For example, the position of the elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, it is intended that all such modifications be included within the scope of this description. The order or sequence of any procedure or procedural steps may be varied or resequencing according to alternative embodiments.Other substitutions, modifications, changes, and omissions may be made to the design, operating conditions, and arrangement of the exemplary modalities without departing from the scope of this description. This description covers methods, systems, and program products in any machine-readable medium for performing various operations. The methods described herein can be implemented using existing computer processors or by means of a special-purpose computer processor for an appropriate system, incorporated RI Cb ίη / 77P7 / E / YILI for this or any other purpose, or by means of a wired system. The modalities within the scope of this description include program products comprising machine-readable media for carrying or having machine-executable instructions or data structures stored thereon. Such machine-readable media may be any available medium that can be accessed by a general-purpose or special-purpose computer and another machine with a processor.By way of example, such machine-readable media may include RAM, ROM, EPROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any medium that can be used to carry or store the desired program code in the form of machine-executable instructions or data structures and that can be entered by a general-purpose or special-purpose computer or other machine with a processor. When information is transferred or provided over a network or other communications connection (whether wired, wireless, or a combination of wired and wireless) to a machine, the machine appropriately views the connection as a machine-readable medium. Thus, any such connection is appropriately termed a machine-readable medium. Combinations of the above are also included within the scope of machine-readable media.Machine-executable instructions include, for example, instructions and data that cause a general-purpose computer, a special-purpose computer, or special-purpose processing machines to perform a certain function or group of functions. Although the figures show a specific order of steps in the method, the actual order may differ. Two or more steps can also be performed simultaneously or with partial concurrency. This variation depends on the chosen software and hardware systems and the designer's choices. All such variations are within the scope of this description. Similarly, software implementations could be carried out using standard programming techniques with rule-based logic and other logic to perform the various connection, processing, comparison, and decision steps. Any references to implementations, elements, or acts of the systems and methods referred to herein in the singular may include implementations comprising a plurality of these elements, and any references in the plural to any implementation, element, or act herein may include implementations comprising only a single element. References in the singular or plural form are not intended to limit the systems or methods described herein, their components, acts, or elements to single or plural configurations. References to any act or element being based upon any information, act, or element may include implementations where the act or element is based at least in part upon any information, act, or element. RI Cb ίη / 77Π7 / E / YΙΛΙ Any implementation described herein may be combined with any other implementation, and references to an implementation, some implementations, an alternative implementation, several implementations, an implementation, or the like are not necessarily mutually exclusive and are intended to indicate that a particular feature, structure, or characteristic described in connection with the implementation may be included in at least one implementation. Such terms as used herein do not necessarily all refer to the same implementation. Any implementation may be combined with another implementation, inclusively or exclusively, in any manner consistent with the aspects and implementations described herein. References to "or" can be considered inclusive, so any terms described using "or" can indicate any one, more than one, or all of the terms described. References to at least one of a conjunctive list of terms can be constructed as an inclusive "OR" to indicate any one, more than one, or all of the terms described. For example, a reference to "at least one of I', and 'B'" can include only I', only 'B', as well as both I' and 'B'. Elements other than I' and 'B' can also be included. The systems and methods described herein can be represented in other specific forms without deviating from their fundamental characteristics. The implementations described above are illustrative rather than restrictive. Where technical features in the drawings, detailed descriptions, or any claims are followed by reference signs, the reference signs have been included to enhance understanding of the drawings, detailed descriptions, and claims. Consequently, neither the reference signs nor their absence have any limiting effect on the scope of the claimed items. The systems and methods described herein may be represented in other specific forms without deviating from their essential characteristics. The foregoing implementations are illustrative rather than limiting to the systems and methods described. The scope of the systems and methods described herein is indicated by the appended claims, rather than by the preceding description, and any changes that fall within the meaning and scope of equivalence of the claims are included herein.

Claims

NOVELTY OF THE INVENTION CLAIMS 1.- A cooling device for a refrigeration system, comprising: one or more heat exchanger coils; a first humidity panel arranged externally towards the one or more heat exchanger coils; a second humidity panel arranged externally towards the one or more heat exchanger coils, the second humidity panel being separated from the first humidity panel by a distance; a first nozzle arrangement arranged externally towards the first humidity panel and configured to provide an atomized spray of electrostatically charged droplets towards the first humidity panel; a second nozzle arrangement arranged externally towards the second humidity panel and configured to provide an atomized spray of electrostatically charged droplets towards the second humidity panel;a humidity sensor configured to provide a representative humidity level signal from at least one of the first or second humidity panels; and a controller communicatively coupled to the humidity sensor, the controller configured to: receive the representative humidity level signal from at least one of the first or second humidity panels; and control a water supply to at least one of the first or second humidity panels in response to the representative humidity level signal.

2. The cooling device according to claim 1, further characterized in that: the humidity level is a first humidity level; the humidity sensor is a first humidity sensor configured to provide the representative signal of the first humidity level from the first humidity panel; and the controller is configured to: receive the representative signal of the first humidity level from the first humidity panel; and control the water supply to the first humidity panel in response to the representative signal of the first humidity level.

3. The cooling device according to claim 2, further characterized in that it additionally comprises: a second humidity sensor configured to provide a signal representative of a second humidity level from the second humidity panel; and the controller configured to: receive the signal representative of the second humidity level from the second humidity panel; and control the water supply to the second humidity panel in response to the signal representative of the second humidity level.

4. The cooling device according to claim 2, further characterized in that it additionally comprises: a second humidity sensor configured to provide a signal representative of a second humidity level from the second humidity panel; and the controller configured to: receive the signal representative of the second humidity level from the second humidity panel; control the water supply to the first humidity panel in response to the signal representative of the first humidity level and the second humidity level; and control the water supply to the second humidity panel in response to the signal representative of the first humidity level and the second humidity level.

5. The cooling device according to claim 1, further characterized in that the controller is further configured to: supply a voltage to the first nozzle arrangement and the second nozzle arrangement; and select the voltage to cause the first nozzle arrangement and the second nozzle arrangement to provide a target quantity of electrostatically charged droplets.

6. The cooling device according to claim 1, further characterized in that the humidity sensor is configured to provide the representative signal of the humidity level from at least one of a lower part of the first humidity panel or a lower part of the second humidity panel.

7. The cooling device according to claim 1, further characterized in that the humidity sensor is configured to provide the representative signal of the humidity level from a drainage receptacle arranged below the first humidity panel and the second humidity panel.

8. The cooling device according to claim 1, further characterized in that the atomized spray of electrostatically charged droplets and the first humidity panel are oppositely charged; and the atomized spray of electrostatically charged droplets and the second humidity panel are oppositely charged.

9. The cooling device according to claim 1, further characterized in that the electrostatic attraction of the atomized spray of electrostatically charged droplets and the first humidity panel substantially prevents leakage of droplets beyond an inner surface of the first humidity panel; and the electrostatic attraction of the atomized spray of electrostatically charged droplets and the second humidity panel substantially prevents leakage of the droplets beyond an inner surface of the second humidity panel.

10. A CO2 refrigeration system with an adiabatic gas cooler with electrostatically charged cooling spray, comprising: a CO2 refrigerant circuit including an evaporator, a compressor, a gas cooler, a receiver, and an expansion valve; wherein the gas cooler comprises: one or more moisture pads adjacent to one or more cooling coils; one or more spray nozzles configured to moisten one or more moisture pads with electrostatically charged water droplets; a moisture sensor associated with one or more moisture pads, operable to provide a signal representative of a moisture level of one or more moisture pads; a controller configured to: receive the signal representative of the moisture level of one or more moisture pads;and control a water supply to one or more humidity pads in response to a representative humidity level signal.

11. The CO2 refrigeration system according to claim 10, further characterized in that the controller is configured to operate the evaporator, the compressor, the gas cooler, the receiver, and the expansion valve.

12. The CO2 cooling system according to claim 10, further characterized in that: the humidity sensor is a first humidity sensor configured to provide the signal representative of the first humidity level from a first humidity pad of one or more humidity pads; and the controller configured to: receive the signal representative of the first humidity level from the first humidity pad; and control the supply of water to the first humidity pad in response to the signal representative of the first humidity level.

13. The CO2 cooling system according to claim 12, further characterized in that it additionally comprises: a second humidity sensor configured to provide a signal representative of a second humidity level from a second humidity pad of the one or more humidity pads; and the controller configured to: receive the signal representative of the second humidity level from the second humidity pad; and control the supply of water to the second humidity pad in response to the signal representative of the second humidity level.

14. The CO2 cooling system according to claim 12, further characterized in that it additionally comprises: a second humidity sensor configured to provide a signal representative of a second humidity level from a second humidity pad of the one or more humidity pads; and the controller configured to: receive the signal representative of the second humidity level from the second humidity pad; control the water supply to the first humidity pad in response to the signal representative of the first humidity level and the second humidity level; and control the water supply to the second humidity pad in response to the signal representative of the first humidity level and the second humidity level.

15. The CO2 cooling system according to claim 10, further characterized in that the controller is additionally configured to: supply a voltage to one or more spray nozzles; and select the voltage to cause the one or more spray nozzles to provide a target quantity of electrostatically charged droplets. RI Cb Ln / Zznz / E / YIAI 16. The CO2 cooling system according to claim 10, further characterized in that the humidity sensor is configured to provide the representative signal of the humidity level from a lower part of one or more humidity pads.

17. A method for providing an evaporative gas cooler for a refrigeration system, comprising: providing one or more heat exchanger coils; installing a first humidity panel external to the one or more heat exchanger coils; installing a second humidity panel external to the one or more heat exchanger coils, the second humidity panel being separated from the first humidity panel by a distance; installing a first nozzle arrangement external to the first humidity panel; configuring the first nozzle arrangement to provide an atomized spray of electrostatically charged droplets toward the first humidity panel; installing a second nozzle arrangement external to the second humidity panel; configuring the second nozzle arrangement to provide an atomized spray of electrostatically charged droplets toward the second humidity panel;Configure a humidity sensor to provide a representative humidity level signal from at least one of the first or second humidity panels; provide a controller communicatively coupled to the humidity sensor; receive, by the controller, the representative humidity level signal from at least one of the first or second humidity panels; and control, by the controller, a water supply to at least one of the first or second humidity panels in response to the representative humidity level signal.

18. The method according to claim 17, further characterized in that the humidity level is a first humidity level and the humidity sensor is a first humidity sensor configured to provide the signal representative of the first humidity level from the first humidity panel, the method further comprises: receiving, by the controller, the signal representative of the first humidity level from the first humidity panel; and controlling, by the controller, the supply of water to the first humidity panel in response to the signal representative of the first humidity level.

19. The method according to claim 18, further characterized in that it additionally comprises: configuring a second humidity sensor to provide a signal representative of a second humidity level from the second humidity panel; receiving, by the controller, the signal representative of the second humidity level from the second humidity panel; and controlling, by the controller, the supply of water to the second humidity panel in response to the signal representative of the second humidity level.

20. The method according to claim 18, further characterized in that it additionally comprises: configuring a second humidity sensor to provide a representative signal of a second humidity level from the second humidity panel; receiving, by the controller, the representative signal of the second humidity level from the second humidity panel; controlling, by the controller, the water supply to the first humidity panel in response to the representative signal of the first humidity level and the second humidity level; and controlling, by the controller, the water supply to the second humidity panel in response to the representative signal of the first humidity level and the second humidity level.

21. The method according to claim 17, further characterized in that it additionally comprises: supplying, by the controller, a voltage to the first nozzle arrangement and the second nozzle arrangement, and selecting, by the controller, the voltage to cause the first nozzle arrangement and the second nozzle arrangement to provide a target quantity of electrostatically charged droplets.

22. The method according to claim 17, further characterized in that it additionally comprises: configuring the humidity sensor to provide the representative humidity level signal from at least one of a lower part of the first humidity panel or a lower part of the second humidity panel.

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