RU2761699C1 - Centrifugal water cooler - Google Patents

Abstract

FIELD: heat engineering.

SUBSTANCE: invention relates to the field of heat engineering and can be used in installations for technological cooling of water (liquids), mainly for air conditioning systems. The device can also be used as an air humidifier. The invention consists in creating a centrifugal water cooler, in which the retention of a layer of water on the inner surface of a rotating cylindrical pan and the formation of a vacuum in the near-surface (boundary) layer of air is realized. To achieve a vacuum that promotes the boiling of water at a temperature below the temperature of a wet thermometer, in the ambient air (usually about 20°C), in the air boundary layer with water, aerodynamic separators are placed, made movable with the possibility of fixing their position along the radius of the circular cylinder of the pan relative to the rotating surface of the water at a circumferential rotation speed of more than 300 m/s.

EFFECT: simplification of the design, reduction in dimensions.

9 cl, 6 dwg, 1 tbl

Description

The invention relates to installations for the technological cooling of water (liquids), mainly for air conditioning systems. The invention can be used as a low temperature steam humidifier.

Known widely used devices for evaporative cooling of recirculated (circulating) water: cooling towers, spray pools, nozzle chambers, open ponds. Such water chillers are described in many literature sources, for example, Chillers and Installations. Malgina E.V., Malgin Yu.V., Suedov V.P. - M .: Food industry, 1980 .-- 592 p. The use of recycled water supply during the operation of thermal power plants allows achieving significant savings in expensive, often scarce water and reducing environmental pollution by waste water. At the same time, the surrounding (outdoor) air is humidified. In the listed devices, the cooling of recirculated water is provided due to its heat and mass exchange with the outside air.

To intensify the process of partial evaporation of water (air humidification), it is additionally dispersed and, with the help of fans, the air speed above the water surface is increased.

The main disadvantages of the listed water coolers are their large dimensions, significant inertia and practical applicability only in stationary systems. The cooling limit is the wet bulb temperature.

It is known to use steam jet refrigerating machines (PCM) for cooling water supplied to air conditioners. Design features are described, for example, in the textbook Zakharov Yu.V. Marine air conditioning and refrigeration units. - 3rd ed., Rev. and add. - SPb .: Shipbuilding, 1994 .-- 504 p. Also, for example, in SU 1054634, published 11/15/83.

The created vacuum in the ejectors allows water to be cooled to lower temperatures up to (5 ÷ 7) ° С than in the evaporative water coolers listed above. The water is cooled (10 ÷ 20) ° C below the wet bulb temperature. The process of water cooling is provided due to the kinetic energy of water vapor supplied under significant excess pressure from the steam boiler to the ejector - the evaporator is evacuated and water boils in vacuum. PHM are distinguished by their simplicity of design (there are practically no moving elements), relatively low initial cost and the fact that water is used as a working fluid.

The main disadvantages of steam jet machines are their large dimensions and weight, low efficiency, and an increased level of generated noise. It is difficult to regulate the cooling capacity of a steam jet machine and to maintain a high vacuum (0.5 ÷ 1.5) kPa in it.

The closest to the claimed technical solution in terms of the technical essence and the achieved technical result is the 'method for changing the moisture content of the gas' (SU 1696817, publication date 07.12.91, F24F 6/16). When gas is passed over the surface of a rotating layer of water, the efficiency and rate of mass transfer increases and droplet entrainment from the water surface is practically prevented. To achieve the desired result, the pan with water is made in the form of a rotating, suction fan pipe.

The described device realizing the method of changing the moisture content of the gas (air humidity) is taken as a prototype of the invention.

The disadvantage of the device proposed in the invention can be attributed to the complexity of centering and balancing the rotating, suction pipe-pallet, mounted on the impeller of the fan.

The technical objective of the invention is to create an energy-efficient, compact water cooler containing an open rotating pan with a layer of water on its walls, made mainly in the form of a circular cylinder (pipe, glass), equipped with water outlets, its drive, housing, casing collecting chilled water, branch pipes warm and cooled water, characterized in that aerodynamic separators are placed in the air layer boundary with water, made movable with the possibility of fixing their position along the radius of the cylindrical pan relative to the rotating surface of the water at a peripheral rotation speed of more than 300 m / s.

The device can operate in continuous or intermittent modes of operation.

The task is solved in the following way.

Chilled water is fed into the pan. When the cylindrical pan rotates, the water is distributed (spreads out) and is stably held on its inner surface by a thin layer. When the circumferential speed of rotation of the water surface, for example, 310-410 m / s, a practically perceptible vacuum appears at the boundary of the media (D. Bernoulli's law). When the static air pressure drops in a thin subsurface sublayer to a level corresponding to the partial pressure of water vapor, the process of nucleate boiling of water occurs, which causes a very intensive cooling of the bulk of the rotating layer of water and humidification of the air passing through the pan.

At lower peripheral velocities of the water surface, the process of its cooling will be observed much less intense and with higher values of the cooling temperature limit - the temperature of the wet thermometer.

To drain the chilled water, an opening (holes) is provided in the sump wall through which water enters the collecting casing and then is directed through the branch pipe to the consumer (for technological needs). Evaporating water humidifies the air in the sump and is discharged with it through the end opening of the sump.

The essence of the invention is to create a water cooler in which the use of centrifugal forces is realized to hold a layer of water on the inner surface of a rotating cylindrical pan and a vacuum is formed in the surface (boundary) layer of air. To achieve low-temperature boiling of the near-surface layer of water at a temperature of about 7 ° C and to cool the bulk of the rotating water, it is necessary to create a near-surface vacuum of about 1 kPa. It is possible to realize such a low-temperature boiling-up of water if the design speed of movement of the open water surface is about 400 ÷ 410 m / s (the calculation is given below). Such peripheral velocities are fixed (up to 400 ÷ 500) m / s on the outer surface of tornado vortices - tornadoes, inside which a vacuum is formed and a powerful suction effect is observed. Manufacturers (China) of high-speed laboratory centrifuges for various purposes offer consumers a large number of serial samples of rotor close in size and rotation frequency up to 25000 rpm. Special orders offer ultra-high-speed centrifuges with a rotor speed of 40 ÷ 80 thousand rpm, and ultracentrifuges up to 100 ÷ 160 thousand rpm. Laboratory centrifuges are usually designed for multiple continuous hours of operation, for example 100 hours.

Preliminary simplified calculations make it possible to assess the possible cooling capacity of the proposed water cooling device.

Consider a variant (example) of a compact centrifugal water cooler with the following dimensions of the rotating pan: the outer diameter of the cylindrical pan is 0.514 m with its length L = 0.2 m, the thickness of the rotating water layer is 0.005 m, the wall thickness of the pan is 0.002 m, the inner diameter of the cylindrical surface of the water is d = 0.5M.

D. Bernoulli's equation (law): P _DIN + P _ST = P _FULL or

Условия для скачкообразного динамического изменения плотности воздуха отсутствуют. (Примечание. Повышение давления воздуха в приповерхностном слое за счёт центробежных сил составляет доли процентов от барометрического “Б“ давления, поэтому в расчётах не учитывается).In the air layer bordering the water surface (laminar sublayer), its velocity relative to the water is always taken to be zero. In this layer of air, its dynamic pressure is completely converted into static pressure - there is a shockless braking of the air flow:

There are no conditions for an abrupt dynamic change in air density. (Note. The increase in air pressure in the near-surface layer due to centrifugal forces is fractions of a percent of the barometric “B” pressure, therefore it is not taken into account in the calculations).

To initiate the boiling mode of water at a temperature of ~ 7 ° C, it is necessary to create air pressure (static) above the water surface P poly = Pst ~ 1000 Pa.

Under these conditions, the air density p is calculated by the formula: p = P _st M / (RT) = 1000 0.029 / (8.31-280) = 0.012 kg / m ³

where: M - molar mass, 0.029 kg / mol,

R is the universal gas constant, 8.31 J / mol K; N m / mol-K,

T - temperature in the boundary layer of air, 280 K.

Estimated peripheral speed of the water surface (equated to the speed of inhibited air in a barotropic process - P / p = Const at T = 280 K)

V = VP • 2 / p = 7 (1000 • 2) / 0.012 ~ 400 m / s

The required frequency of rotation of the pan with water will be: n = V / (i-d) = 255 s ¹ * 15300 min ¹

Let's calculate the cooling time of the water in the sump by 10 ° C.

Mass of water rotating in the pan

G _w = Tt (D ² -d ² ) L- p = 3.14 (0.51 ² -0.5 ² ) 0.2-1000 = 6.3 kg where: D is the outer diameter of the rotating layer of water, 0 , 51m

The amount of heat required to cool the water in the sump by 10 ° C Q = c-Gw'AT = 1-6.3-10 = 63 kJ where: c is the heat capacity of water, ~ 1 kJ / kg-K

Taking into account the heat losses for cooling the ambient air in contact with the rotating surfaces of the water cooler, we take the safety factor k = 1.25. Q _K = Ql, 25 ~ 80 kJ

The mass of water evaporated to cool it

m _w = Q _K / r _w = 80/2484 ~ 0.03 kg,

where: r _w is the heat of vaporization of water at T = 280 ° C, 2484 kJ / kg (In this case, the thickness of the evaporated water layer will be fractions of a mm).

The amount of heat Q _T transferred to the boiling surface layer of water from the bulk of the cooled water (heat flow maintaining the boiling mode - cooling mode) or the total refrigerating capacity Q _{x of the} water cooler:

Qt ^- Qx = Sw-Yakip ⁼⁼ (i'b'PrTskip ⁼ 0.314'8 ~ 2.5 kW

where: S _w = 0.314 m ² - the area of the open rotating surface of the water

or

where: q _KIP - specific heat flux at nucleate boiling of water

when? T = 10 ° C, ≈ 8 kW / m ^2,

- время испарения (кипения) - время охлаждения расчетной массы воды, находящейся в поддоне.

- evaporation (boiling) time - cooling time of the calculated mass of water in the pan.

The useful cooling capacity (net) will be about 2 kW (sufficient for use in a domestic or office space up to 20 m ² ).

The amount of water vapor evaporating from the surface of the water - entering the air volume of the sump - then removed from it (maximum design capacity of the humidifier device):

≈2,5÷3,0 кг/чG _w = m _w / τ = 0.03 / 32≈0.0009 kg / s (3.2 kg / h); taking into account losses

≈2.5 ÷ 3.0 kg / h

The technical result of the invention is the creation of a centrifugal water cooler mainly for air conditioning installations using water recirculation systems in stationary and transport facilities. We can say that the proposed design of a small-sized centrifugal vacuum cooling tower.

For the purpose of a more detailed presentation of the essence of the process of cooling water in the considered centrifugal device, let us consider its physical model using the example of a prototype and taking into account constructive proposals for its improvement.

1. A physical model that reflects the functioning of the prototype device and implements the method of gas vapor saturation according to SU 1696817, F24F 6/16, in which a layer of water in contact with air rotates in an open cylindrical pan, forming a cylindrical heat-mass transfer surface.

Moreover, the higher the peripheral velocity of the open water surface, the more intense heat and mass transfer and the lower the temperature of its evaporative cooling (the most intense cooling process will be carried out when the static air pressure above the open water surface drops to the level of its boiling process at a deliberately lower temperature).

Note. When studying physical processes occurring in rotating devices, a polar coordinate system is usually used to describe them.

However, when considering the established process of physical interaction of contacting media, it is often a more rational solution to use a simplified linear - one-dimensional model (described in a Cartesian coordinate system). To do this, it is enough to transfer an imaginary starting point of reference - the origin of coordinates to the open surface of a rotating cylindrical layer of water.

1.1. To calculate the air pressure in the boundary laminar sublayer of air above the water surface, we again use the well-known equation of D. Bernoulli

(R _DIN + R _ST ≈ _{R FULL} = B).

Usually, in aeromechanics, the applicability of this equation is unconditionally admitted at the speeds of the air flow around the airfoils, for example, aircraft, not exceeding 100 m / s (<0.3M - the speed of sound), since at the indicated speeds, air compression is minimal and is not taken into account in practical calculations.

Initially, we will consider a physical model in which there are no surfaces of physical bodies, streamlined by a high-speed air flow - there is no (excluded) the possibility of shock compression of air, an abrupt increase in its density. There is no effect of the occurrence of shock waves - shock waves that violate the structure of the steady air flow [Loitsyansky L.G. Mechanics of liquid and gas. Ed. 5th, revised, Chap. ed. phys-mat. lit-ry ed. "Science", M., 1978, 735 p.].

1.2. Consider the calculated parameters of the air flow (air layer), semi-bounded by the rotating water surface, see table. one.

Airflow parameters confined to a rotating water surface at variable sump speed (rounded values).

In the calculations, we take the barometric air pressure B = 101300 Pa, the air density in the barotropic process ρ = 1.2 kg / m ³ .

Analyzing the calculation results presented in table. 1, three ranges of near-surface air flow velocities can be distinguished:

- 0 ÷ 100 m / s static pressure in the air flow is practically equal to the barometric pressure, Р _СТ ≈100000 Pa; boiling point of water ≈ 100 ° С;

- 200 ÷ 300 m / s static pressure in the air flow decreases by about 25-50%; the boiling point of water drops to 90 ÷ 80 ° С;

- 310 ÷ 410 m / s static pressure in the air flow decreases very quickly (by about an order of magnitude) to the value of Р _СТ ≈ 1000 Pa; the boiling point of water drops rapidly from about 70 ° C to 7 ° C.

The specified frequency of rotation of the pallet maintains the design speed of the near-surface (inhibited) sub-layer of air with the diameter of the open cylindrical rotating surface of water equal to 0.5 meters.

The boundary layer-sublayer of air with a thickness of several millimeters (or fractions of a millimeter) has the ability to adhere to the contact surface (the velocity at the surface is zero); it predominantly exhibits the properties of laminar viscous interaction moving slowly inside thinner quasi-molecular layers of air. This laminar sublayer on the opposite side also contacts (borders) with a thin, called turbulent sublayer of air, in which the viscous and more chaotic pulsating vortex turbulent properties of the moving air stream are only partially manifested.

If the circumferential speed of the open surface of the rotating cylindrical layer of water according to the presented calculation is 400 m / s, then on the inner surface of the formed boundary (inhibited) air layer, the calculated speed is 99% (396 m / s) of the speed (with a conventionally smooth - mirror) water surface [G. Schlichting. Boundary layer theory. "Science", M, 1974, 712 s].

In this case, in a laminar sublayer conventionally stationary relative to the water surface, the reduced static air pressure will be determined (calculated) by the complete transformation of the boundary interlayer dynamic pressure of the moving air (its complete shockless deceleration at a speed of 400 m / s) into its static pressure.

In the model under consideration, in the contact boundary molecular layers of air moving with the greatest relative slippage, an insignificant shockless heating of rubbing molecules is possible, an additional decrease in the density of which will contribute to their displacement-displacement in the radial direction to the axis of rotation of the pan.

It should be noted that a real rapidly rotating device (sump with water) always has its residual (permissible) imbalance, which affects the degree of vibration of the sump walls and, as a consequence, the formation of microroughnesses (microwaves) on the open surface of the rotating layer of water. Any microroughnesses on the rotating surface create a conditional dynamic roughness on it, which contributes to increased friction between water and air, the generation of disturbances in the form of additional turbulization in the contact layers of both near-surface media, and a decrease in the thickness (destruction) of the aerodynamic laminar sublayer.

1.3. In the turbulent boundary sublayer, processes are generated that facilitate the evacuation of the air in the laminar sublayer. At the design boundary of the laminar and turbulent sublayers, the greatest gradient of the fall in the value of the velocity (slip of layers) of air is observed.

Note. Such significant speed changes can be observed at the boundary of an ejection (suction) jet, for example, a steam ejector, which creates a significant vacuum in the mixing chamber of a refrigeration machine connected to the evaporator.

The efficiency of jet ejection devices (ejectors, spray guns, spray guns, carburetors, etc.) is based on the well-known law of D. Bernoulli - this is stated in many sources of popular and technical literature [Ya.I. Perelman. Entertaining physics. Centerpolygraph, 2017. - 256 p.].

The conditional (calculated) contact boundary between the turbulent and laminar sublayers of air can be identified with sufficient reliability with the outer contact boundary of a high-speed jet formed in a steam-air ejector.

This predetermines the possibility of ejection and removal of air molecules from the near-surface laminar sublayer (conditionally replacing a very small mixing chamber of the ejector), i.e. the air pressure in this sublayer will decrease, and the air and water vapor molecules will move (withdrawn, injected) into the turbulent sublayer and further into the steady turbulent air flow.

In the laminar air sublayer, the proportion of kinetic energy, especially of the near-boundary (transitional) most dynamic part of the turbulent sublayer, is transferred to air molecules (gas and vapor particles) that are sucked in and transported into the turbulent sublayer.

Note that, heading into a turbulent sublayer, the formed mixture of molecules is directed to a zone with a higher static air pressure (as in a steam-air ejector) due to a sharp drop (by an order of magnitude or more) in kinetic energy - deceleration of a mixture of molecules that initially belong to adjacent boundary sublayers ...

Further, the static pressure of the mixture already in the steady air flow is compared with the atmospheric barometric pressure of the air entering the pan and the particles of the mixture leave the internal volume of the pan, moving along the surface of the rotating layer of water, mainly along a helical trajectory.

An additional positive effect on the process under consideration is exerted by the centrifugal force arising during the rotation of the cylindrical pan, which provides the effect of separation of molecules, which enhances the movement (squeezing out) of lighter water vapor molecules that are avalanche-like formed when a boiling regime occurs in the near-surface layer of water into the zone of a steady turbulent air flow. The same effect displaces the vapor-gas bubbles present in the water, which affect the initiation of the boiling process, to its open surface, and also contributes to the desalination of the surface layer of water.

2. Consider a physical model of the water cooling process when additional aerodynamic separators of the near-surface flow are placed in the air boundary layer with it, made movable with the possibility of rational fixing their position along the radius of the cylindrical sump relative to the rotating water surface, while the configuration of which, for example, the angle of installation of the separators (Н5 degrees minimizes possible air compression surges.

Aerodynamic flow dividers help to increase and stabilize the thickness (height) of the near-surface laminar sublayer - a zone with a reduced static pressure of the vapor-air medium. They contribute to the separation and removal of the attached - parasitic part of the air flow (its useless mass) from the most high-speed rotating air layer in which conditions are formed for the ejection of air and vapor molecules from the near-surface laminar sublayer. The separated air flow is directed to the zone of a steady turbulent flow located outside the boundary turbulent sublayer.

With a given configuration of aerodynamic flow dividers, which provides a sliding flow and a slight shockless compaction of air on their surface, only some heating and electrification-ionization of air layers is possible, arising due to the manifestation of viscous friction forces when air moves along the surface of the separators with the greatest relative slippage [Povkh And .L., Technical hydromechanics. Publishing house “Mechanical engineering ⁴⁴ , L., 1969. 524s.].

However, viscous heating of air causes an additional decrease in its density, which will facilitate the movement of molecules - their removal from the water surface.

At the same time, a technological decrease in the static air pressure at the conditional boundary of adjacent sublayers also lowers the level of a possible increase in air temperature during their mutual sliding-friction.

2.1. On the features of aerodynamic separators of the near-surface air flow, partially submerged in a rotating layer of water (Fig. 1).

With such a configuration of aerodynamic separators, their minimum height in the near-surface air layer is comparable to irregularities (dynamic microwaves, roughness measured in millimeters or their fractions), which are usually present on its open surface and destroy the laminar boundary sublayer. In addition, steam and gas bubbles formed on an open surface during water boiling have a destructive effect on the boundary air laminar sublayer.

Aerodynamic separators of the near-surface air flow, creating a so-called aerodynamic shadow when flowing around them - a zone with an additionally reduced static air pressure can be constructively presented both in the form of a small number of relatively large products-blades, and in the form of a large (mass) number of small components forming the separator similar, for example, to needles (bristles) observed in the well-known in everyday life "Velcro" connection or in the form of a highly porous wall with open through pores, etc.

Needle flow dividers or a porous wall make it possible to practically completely isolate (separate) the boundary with a high-speed turbulent air flow from the water surface (Fig. 2).

The specified flow dividers form a vapor-air zone that moves (rotates) in space with practically no slippage relative to the open water surface and in which a reduced static pressure is maintained, which is formed at the boundary of this zone with a maximum relative velocity between well (shock-free) streamlined aerodynamic separators of the near-surface flow and turbulent sublayer of air in contact with them.

The separated less-speed part of the turbulent air flow moves in the axial direction, contributing to a certain increase in its static pressure in the zone remote from the boundary laminar sublayer, i.e. the separators partially function as a confuser, which is usually used in ejectors (Fig. 3).

By changing and fixing the height of the movable air flow dividers above the water surface or the thickness of the water layer rotating in the pan, it is possible to control - influence the conditions for the flow of aerodynamic processes in the subsurface sublayer. This makes it possible to actively influence the transformation of the laminar structure of the sublayer into a transitional or turbulent state of the vapor-air medium at a more optimal distance from the open water surface.

Air flow dividers, partially buried in the water layer and fixed relative to the rotating pan, additionally prevent (slow down) the slippage of the near-surface water layers in contact with air relative to its deeper layers. Such a design of the elements contributes to an increase in the relative velocity between the contacting media (water - air) and, therefore, to an increase in the intensity of heat and mass transfer processes between them, are an additional factor initiating (forming) the conditions for the occurrence and maintenance of the process of low-temperature nucleate boiling in the near-surface layer of water.

In a variant version, the air flow dividers are made of a material with positive buoyancy. This guarantees the constant location (deepening) of the spacers when the thickness of the rotating water layer changes (Fig. 4).

On the axis of rotation of the cylindrical pallet, a zone of reduced air pressure is created, which is involved in rotational motion upon contact with the moving surface of the water. Air from the surrounding volume (room) will be sucked into the zone with reduced air pressure.

Humidified air from the near-surface layer will be removed from the pallet following a helical path through the peripheral annular part of the end hole.

In order to separate the counter flows and streamline the movement of air inside the pallet, it is proposed to install air distributors-plugs for the end openings of the pallet, which are fixed to the pallet or frame, or to the body of the water cooler (Fig. 5).

2.2. On aerodynamic separators of the near-surface air flow installed above the surface without contact with water.

Such a configuration of aerodynamic air flow dividers allows not only to ensure the fulfillment of most of the technological functions of the proposed device described in clause 2.1, but also expands the possibilities of effective use of the proposed water cooler.

The design differences of aerodynamic separators that are not in contact with the rotating water layer are due to the options for their fixation relative to the rotating pan or body. The version with rigid fixation of dividers to the pallet ensures their joint rotation with a uniform frequency. When fixing the air flow dividers to the device body, they do not participate in the rotation of the pallet and remain stationary; By combining separators with an additional power frame and supplying it with an autonomous drive, the separators rotate (coaxial with the pallet) with the required frequency and direction.

The kinematically decoupled design of the device has the greatest capabilities to implement the task (Fig. 6). For the mutual alignment of the shafts of both drives, it is recommended to install, for example, a rubber-like plain bearing, lubricated by the water entering the sump.

Note that the speed of rotation of the sump with water and the frame with aerodynamic dividers can differ many times. A significantly lower rotation frequency (peripheral speed) of the sump is necessary to maintain a stable layer of water on its inner walls with the formation of an open cylindrical surface of water.

The option of simultaneous rational use of aerodynamic air flow dividers united by a frame, which do not come into contact with water, and others, which are partially immersed in a rotating layer of water, is not excluded.

The offered versions of a centrifugal water cooler are distinguished by their simplicity and compact design, minimal energy consumption, reliable operation and environmental friendliness.

The proposed device allows you to cool water to temperatures that are most often reached with the use of traditional freon refrigeration machines (chillers). In the proposed device, the working fluid is water.

High rates of interaction between water and air, bringing water to a boil repeatedly intensify the process of heat and mass transfer, while the drift of droplet moisture, which is usual for evaporative contact devices, does not occur. It is allowed to use contaminated water - with increased dry residue.

The invention makes it possible to organize its effective application for any orientation of the device in space.

The essence of the proposed technical solution is illustrated by figures, which show:

FIG. 1. Schematic representation of the variant of placement and fixation in the pan of aerodynamic separators, partially submerged in a layer of water (cross-section).

FIG. 2. Schematic representation of the location of the aerodynamic separator fixed in the pallet in the form of a porous cylinder with through pores, partially submerged in a layer of water (conventionally flat image of a part of the cylinder).

FIG. 3. Schematic representation of a variant of coaxial placement inside the frame pallet with aerodynamic dividers that are not in contact with water (cross-section).

FIG. 4. Schematic representation of a variant of aerodynamic separators fixed inside the pallet with positive buoyancy (conventionally flat image of a part of the pallet and a layer of water).

FIG. 5. Schematic representation of a variant of the air distributor-plug located in the end hole of the pallet.

FIG. 6. Schematic representation of a centrifugal water cooler with aerodynamic separators located in the pan, not in contact with water, combined with a frame equipped with an autonomous drive (option).

In this case, the following identical designations are used in all figures:

Pos. 1 - pallet made in the form of a thin-walled cylinder.

Pos. 2 - a layer of water in a rotating pan.

Pos. 3 - aerodynamic separators, partially submerged in the water layer.

Pos. 4 - frame with aerodynamic dividers that are not in contact with water.

Pos. 5 - plug-in air distributor with a central hole.

Pos. 6 - frame drive (with possible movement along the axis of rotation).

Pos. 7 - chilled water pipe.

Pos. 8 - water outlet.

Pos. 9 - chilled water collecting casing.

Pos. 10 - housing (frame) of a centrifugal water cooler.

Pos. 11 - warm water pipe (movably connected to the hollow shaft of the drive).

Pos. 12 - pallet drive.

Pos. 13 - bearing (centering shafts of pallet and frame drives).

Pos. 14 - aerodynamic separator made of porous material.

Pos. 15 - aerodynamic dividers with positive buoyancy.

Claims (9)

1. A centrifugal water cooler containing an open rotating pan, made mainly in the form of a circular cylinder, equipped with water outlets, its drive, a housing, a chilled water collector casing, warm and chilled water pipes, characterized in that an air layer is placed in the boundary with water aerodynamic separators made movable with the possibility of fixing their position along the radius of the circular cylinder of the pallet relative to the rotating surface of the water at a peripheral rotation speed of more than 300 m / s. 2. The cooler according to claim. 1, characterized in that the aerodynamic separators are provided with a load-bearing frame fixed relative to the rotating pallet or body. 3. The cooler according to claim 2, characterized in that the power frame is equipped with a drive that ensures its coaxial autonomous rotation or stop relative to the rotating pallet. 4. Cooler according to any one of paragraphs. 1-3, characterized in that the aerodynamic separators are placed above the water surface in the absence of contact with water. 5. Cooler according to any one of paragraphs. 1-3, characterized in that the aerodynamic separators are partially submerged in water or in contact with the water surface. 6. The cooler according to claim 5, characterized in that the aerodynamic separators, each individually or combined with the load-bearing frame, are made of a material with positive buoyancy and are fixed relative to the pallet 7. The cooler of claim. 1, characterized in that the spacers are installed at an angle of 0-5 degrees relative to the rotating surface of the water. 8. The cooler according to claim 1, characterized in that the aerodynamic separator is made in the form of a hollow cylinder partially submerged in water, made of a rigid highly porous material with open pores, located coaxially with the pallet. 9. The cooler according to claim 1, characterized in that the open end opening of the cylindrical pallet is partially covered with a plug-distributor of air flows entering along the axis of rotation and outgoing humidified peripheral air flows.

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