CN112710164A

CN112710164A - Energy-saving and efficiency-increasing method and device combining photovoltaic power generation and mechanical ventilation cooling tower

Info

Publication number: CN112710164A
Application number: CN202110014474.1A
Authority: CN
Inventors: 唐伟明
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-01-06
Filing date: 2021-01-06
Publication date: 2021-04-27

Abstract

The application relates to an energy-saving and efficiency-increasing method and device combining photovoltaic power generation and a mechanical ventilation cooling tower, which comprises the following steps: the solar panel is arranged above an air inlet area of an air inlet of the mechanical ventilation cooling tower, the air inlet area is shaded and cooled through the solar panel, and the installation height of the solar panel is determined according to the field condition and the installation inclination angle and is not higher than an air cylinder of the mechanical ventilation cooling tower; a spray cooling device is arranged in a space from the back surface of the solar cell panel to the lower edge of the air inlet, and the spray volume of the spray cooling device is determined according to the environment humidity and/or the air volume of the mechanical ventilation cooling tower; the automatic control device controls the water supply device to pressurize and filter the circulating water in the mechanical ventilation cooling tower and then supply the pressurized and filtered circulating water to the spray cooling device. So set up, can solve current mechanical draft cooling tower outlet water temperature in summer high and lead to using the equipment operation energy consumption of cooling water high to and distributed photovoltaic power generation is with high costs, economic benefits low technical problem.

Description

Energy-saving and efficiency-increasing method and device combining photovoltaic power generation and mechanical ventilation cooling tower

Technical Field

The application relates to the technical field of mechanical ventilation cooling towers and photovoltaic power generation, in particular to an energy-saving and efficiency-increasing method and device combining photovoltaic power generation and a mechanical ventilation cooling tower.

Background

The existing mechanical ventilation cooling tower is a device which uses water as a circulating coolant, utilizes the flowing contact of the water and air to evaporate and absorb heat, and discharges the absorbed heat to the atmosphere so as to reduce the water temperature. The mechanical ventilation cooling tower generally has the phenomena of insufficient cooling capacity in summer and high water outlet temperature, and the main reasons are as follows: the ambient temperature rises and the humidity increases; when the mechanical ventilation cooling tower runs for a long time, the scattering coefficient of the filler is reduced, so that the contact area between water and air is reduced; the packing layer has the phenomena of damage and blockage, the resistance in the tower is increased, the efficiency of the fan is reduced, and the air flow rate is reduced; as ambient temperatures increase, the downstream device cooling load demand increases.

In order to reduce the temperature of the outlet water of the mechanical draft cooling tower, the following methods are generally adopted: the water-steam exchange area of the mechanical ventilation cooling tower is enlarged; the power of the fan is increased, and the heat exchange air quantity is improved; supplementing low-temperature fresh water and increasing the high-temperature water drainage; the temperature and the humidity of air entering the tower are reduced by supplementing fresh air. These methods require increased investment, consume a large amount of energy, or cause environmental pollution, etc. Therefore, the energy-saving problem of the mechanical ventilation cooling tower in operation in summer is very prominent.

The existing photovoltaic power generation is a technology for directly converting light energy into electric energy by utilizing the photovoltaic effect of a semiconductor interface. The solar energy power generation system mainly comprises a solar panel (assembly), a controller and an inverter, and the main components are electronic components. The solar cells are packaged and protected after being connected in series to form a large-area solar cell panel assembly, and then the photovoltaic power generation device is formed by matching with components such as a power controller and the like. The application of photovoltaic power generation is limited by the following factors: the irradiated energy has small distribution density, namely a huge area is occupied; the price is high; the energy conversion efficiency is low.

Common methods for improving the utilization efficiency of photovoltaic power generation include: adopting a maximum power automatic tracking system; controlling the temperature of the photovoltaic panel to be about 25 ℃; ensuring that the photovoltaic panel is clean and free of dust; line loss is reduced, and inverter efficiency is improved. The application of the methods is limited by various objective conditions, and the methods are difficult to implement wholly or partially, so that the actual utilization efficiency of photovoltaic power generation is low, the power generation cost is high, and the large-scale popularization is greatly influenced. Therefore, the seeking of low-cost and high-efficiency photovoltaic power generation application is a problem which needs to be solved urgently by a professional in the related field.

Patent CN206876009U provides a capacity-expansion efficiency-increasing type counter-flow mechanical ventilation cooling tower, which utilizes the spaces at both sides of the air inlet of the main body of the built counter-flow mechanical ventilation cooling tower to expand the packing area, and increase the packing area, and after the same amount of water is distributed on the surface of the enlarged packing, the water spraying density per unit packing area is reduced, which is beneficial to exchanging more heat and improving the performance of the main body of the mechanical ventilation cooling tower, but the capacity-expansion efficiency-increasing mode has higher requirement on the space occupied by the mechanical ventilation cooling tower, is not suitable for the mechanical ventilation cooling tower with limited space, and the increase of the packing increases the wind resistance, reduces the wind speed, and is not beneficial to heat exchange; patent CN109780924 provides a synergistic device for a mechanical ventilation cooling tower, which comprises a housing, an evaporation core, an air supply system, a support, a water distribution pipe, and a water return tank, wherein the housing is internally provided with the water distribution pipe, the evaporation core, and the water return tank, the evaporation core is internally provided with a honeycomb structure, the synergistic device for the mechanical ventilation cooling tower is arranged at an air inlet of the mechanical ventilation cooling tower, the evaporation core faces a window of the mechanical ventilation cooling tower, the air supply system is positioned outside the window of the mechanical ventilation cooling tower, external air firstly flows through the evaporation core under the action of the air supply system and then enters the mechanical ventilation cooling tower, a part of water is distributed from an upper water pipe of the mechanical ventilation cooling tower to the water distribution pipe, the distributed water is treated by the synergistic device for the mechanical ventilation cooling tower, passes through the evaporation core from top to bottom, flows into a water collecting tank of the mechanical ventilation cooling tower from the water return tank, the contact area of air and water is increased, and the air quantity of the mechanical ventilation cooling tower is supplemented through the arrangement of an air supply system, so that the air flow rate in the tower is improved, and the cooling efficiency of the mechanical ventilation cooling tower is improved; the patent CN102466416B provides a method for increasing the air inlet volume of an air inlet in summer and changing the wet bulb temperature of the air inlet of a mechanical ventilation cooling tower, so as to reduce the temperature of cooling water, improve the working efficiency of the mechanical ventilation cooling tower and achieve the purposes of energy saving and consumption reduction, the technical scheme adopted is that a circle of water pipelines are respectively arranged at the inner side and the outer side of the air inlet of the mechanical ventilation cooling tower, a nozzle is arranged on the water pipeline, the inner space and the outer space around the air inlet form an air cooling area by low-temperature spraying in summer, so that the temperature of higher air wet bulb temperature is reduced after passing through the cooling area, low-temperature water sprayed out by the nozzle is supplied to the water source by the mechanical ventilation cooling tower, after secondary refrigeration by refrigeration equipment, the low-temperature water is supplied to the circle of water; patent CN101788173B provides a compound high temperature cooling water set of water spray formula air cooler and no filler spraying machinery ventilation cooling tower, make water spray formula air cooler and the combination of counterflow no filler spraying machinery ventilation cooling tower, outdoor air is when the high temperature cold water air cooler of outdoor air process when operation in summer, outdoor air, carry out between the circulating water that sprays and the high temperature cold water air cooler intraductal high temperature cold water three and have the process of sensible heat exchange again promptly, make air cooler's heat exchange capacity greatly increased on the one hand, make outdoor air obtain effectual precooling, on the other hand has washd air cooler again and has purified outdoor air.

In the methods, the temperature of air entering the mechanical ventilation cooling tower can be obviously reduced by spraying and spraying water, so that the heat exchange efficiency of the mechanical ventilation cooling tower is improved, and the water temperature of the mechanical ventilation cooling tower is not higher. However, spraying and water spraying are usually carried out in equipment, users must invest additionally or modify the existing equipment, and the over-temperature condition in summer is short, so that the investment benefit is poor; if the spray and the water spray are changed outside the tower, the cooling effect of the spray and the water spray is greatly reduced because the water mist absorbs a large amount of heat in direct sunlight in summer.

The patent CN109980681A provides a system for optimizing the power generation amount of a photovoltaic power station, which cools a photovoltaic panel in operation to improve the power generation amount of the photovoltaic power station, but the cooling unit of the system includes a cooling water pipe, a water tank, a cooling water tower, a water pump and a water pump control module which are laid on the back of a photovoltaic module, so that the system has high cost and a complex structure, and is only used for cooling the photovoltaic system, and the investment benefit is not good; the patent CN205545144U provides a photovoltaic power generation system based on heat pipe heat dissipation, the heat pipe heat dissipation circulating water cooling technology is utilized to carry out heat dissipation and cooling on the back of a photovoltaic solar panel assembly in a photovoltaic power station, the operating temperature of the photovoltaic module in the power generation process is reduced, the conversion efficiency of the photovoltaic solar panel is improved, the aging process of the photovoltaic solar panel assembly is delayed, the service life is prolonged, the economic operating service life of the photovoltaic power station is prolonged, the generated energy is improved, meanwhile, cooling water in a pipeline of the heat pipe heat dissipation circulating water cooling system is utilized to automatically spray water for cleaning the photovoltaic solar panel assembly during the stop operation of the photovoltaic power station at night, the influence of the reduction of the generated energy of the photovoltaic solar panel due to dust covering is reduced, and meanwhile, the workload and cost; patent CN109268142A provides a combined cooling heating and power system for supplying power and water to a building, a thermal power generation device for converting chemical energy of fuel into electric energy, a photovoltaic power generation device for converting light energy into electric energy, a cooling device connected with the photovoltaic power generation device for cooling the photovoltaic power generation device, a heat pump unit including an evaporator connected with the cooling device for providing cooling water to the cooling device; patent CN105618433B provides a triple dust removal device for a solar photovoltaic panel, which comprises a brush for removing dust, a water spray for blowing for removing dust, and a water scraping for removing dust, and is arranged on the surface of a photovoltaic module system through a rail system, and is used for removing dirt such as dust deposition, bird droppings and the like on the surface of the photovoltaic panel, thereby avoiding the phenomenon that the photovoltaic panel is damaged due to hot spot effect, further improving the generating capacity of the photovoltaic panel, utilizing a circulating working circuit to control the automatic and circulating operation of the device, realizing the regular cleaning of the photovoltaic panel, reducing the maintenance cost, and improving the generating efficiency of a photovoltaic power station; patent CN103268896B provides a dust removal cooling integrated device of solar photovoltaic board, including spraying dust pelletizing system, cooling pipe system, pond and installing the solar photovoltaic board on the pond, compare with solitary dust collector, cooling device, the device realizes the refrigerated integration of dust removal, and the device is synthesized the energy consumption and is low, reaches same productivity equipment investment few.

Therefore, how to solve the technical problems that the water outlet temperature of the mechanical ventilation cooling tower in summer is high and the operation energy consumption of equipment using cooling water is high, the cost of distributed photovoltaic power generation is high, and the economic benefit is low in the prior art is a key technical problem to be solved by technical personnel in the field.

Disclosure of Invention

In order to overcome the problems in the related art at least to a certain extent, the application aims to provide an energy-saving and efficiency-increasing method and device combining photovoltaic power generation and a mechanical ventilation cooling tower, which can solve the technical problems that the mechanical ventilation cooling tower in the prior art is high in summer effluent temperature and causes high equipment operation energy consumption using cooling water, and distributed photovoltaic power generation is high in cost and low in economic benefit. The technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the application are described in detail in the following.

The application provides an energy-saving and efficiency-increasing method combining photovoltaic power generation and a mechanical ventilation cooling tower, which comprises the following steps:

the solar panel is arranged above an air inlet area of an air inlet of the mechanical ventilation cooling tower and at the same height position as the top of the mechanical ventilation cooling tower, the width of the solar panel in the air inlet direction of the air inlet is 2-6 m, and the air inlet area is shaded and cooled by the solar panel, wherein the solar panel is assembled into an array by a plurality of same components, the installation height of the lower edge of the array of the solar panel is determined according to the field condition and the installation inclination angle, and the installation height of the upper edge of the array is not higher than the air duct of the mechanical ventilation cooling tower;

the solar panel is a flat plate type consisting of blocky crystalline silicon, and is used for a small photovoltaic power station and a low-voltage distribution network to run in parallel, and has no spontaneous self-use and no electric energy output to an external power grid;

a spray cooling device is arranged in a space from the back of the solar panel to the lower edge of the air inlet, the spray cooling device comprises a plurality of groups of fixed medium-high pressure micro-mist type spray heads, the back temperature of the solar panel and the air temperature of the air inlet area of the air inlet of the mechanical ventilation cooling tower are reduced through high-pressure spray of the spray cooling device, and the spray volume of the spray cooling device is determined according to the environment humidity and/or the air volume of the mechanical ventilation cooling tower;

installing a water supply device and an automatic control device, controlling the water supply device to pressurize and filter circulating water in the mechanical ventilation cooling tower through the automatic control device, and then supplying the pressurized and filtered circulating water to the spray cooling device and various water using devices;

and installing a power supply and distribution device, wherein the power supply and distribution device is of an intelligent alternating current grid-connected control cabinet type, and the power supply and distribution device is used for controlling starting and stopping of various electrical devices.

Preferably, the method further comprises the following steps:

installing a first cleaning device on the front surface of the solar panel, and cleaning dust on the surface of the solar panel through the first cleaning device;

installing a second cleaning device at an air inlet of the mechanical ventilation cooling tower, and cleaning dirt on a filler plate and/or a dust guard plate at the air inlet through the second cleaning device;

and the automatic control device controls the water supply device to pressurize and filter circulating water in the mechanical ventilation cooling tower and then supply the circulating water to the first cleaning device and the second cleaning device.

Preferably, also include:

the solar water heater is characterized in that an electric heating heat-preservation water tank is installed, the type of the electric heating heat-preservation water tank is a low-voltage direct-current heating type, the power supply and distribution device uses low-power photovoltaic electric energy of the solar cell panel, which is not connected with the internet, to heat water in the electric heating heat-preservation water tank to 40-80 ℃, and when the water supply device needs hot water, the automatic control device determines whether to open a pipeline valve of the water supply device according to the water temperature in the electric heating heat-preservation water tank.

Preferably, the automatic control device controls the water supply device to convey water in the electric heating heat preservation water tank to the first cleaning device and the second cleaning device.

Preferably, the automatic control device controls the water supply device, the water is supplied to the spray cooling device in the high-temperature period in summer and daytime to be cooled by spraying, and the water is supplied to the first cleaning device to clean the solar panel in the spare time or the water is supplied to the second cleaning device to clean the air inlet of the mechanical ventilation cooling tower.

The application also provides an energy-saving and efficiency-increasing device combining photovoltaic power generation and a mechanical ventilation cooling tower, and the energy-saving and efficiency-increasing method combining photovoltaic power generation and the mechanical ventilation cooling tower comprises the mechanical ventilation cooling tower, a distributed photovoltaic power generation device, a spray cooling device, a water supply device and an automatic control device, wherein the distributed photovoltaic power generation device comprises a solar cell panel which is arranged above an air inlet area of an air inlet of the mechanical ventilation cooling tower and is higher than the top of the mechanical ventilation cooling tower in the height direction, and is used for shading the air inlet area of the air inlet, an installation support, an inverter and a power supply and distribution circuit, the solar cell panel is assembled into an array by a plurality of same components, the width of the solar cell panel in the air inlet direction of the mechanical ventilation cooling tower is 2-6 meters, and the installation height of the lower edge of the array of the solar cell panel determines the energy-saving and efficiency-increasing method according to the field situation and, And the mounting height on the upper edge of the array is not higher than the air duct of the mechanical ventilation cooling tower, the spray cooling device comprises a plurality of groups of fixed medium-high pressure micro-mist type spray heads and is mounted in the space from the back of the solar cell panel to the lower edge of the air inlet, the water supply device is communicated with the mechanical ventilation cooling tower and the spray cooling device, and the automatic control device is in communication connection with the water supply device.

Preferably, a first cleaning device for cleaning dust on the surface of the solar panel is arranged on the front side of the solar panel, a second cleaning device for cleaning dirt on a filler plate and/or a dust guard plate at the air inlet is arranged on the air inlet of the mechanical ventilation cooling tower, and the first cleaning device and the second cleaning device are both communicated with the mechanical ventilation cooling tower through the water supply device; the first cleaning device and the second cleaning device respectively comprise a guide rail, a reciprocating motion mechanism, a water spraying pipeline, a brush motion mechanism and an electric control circuit.

Preferably, the water supply device comprises a booster water pump, a filter and a pipeline valve, wherein a water inlet end of the booster water pump is communicated with the mechanical ventilation cooling tower, a water outlet end of the booster water pump is communicated with the filter, and the filter is communicated with the spray cooling device, the first cleaning device and the second cleaning device; the water supply device pressurizes water on a water inlet pipeline of the mechanical ventilation cooling tower to 0.4-2MPa and conveys the water to the spray cooling device, the first cleaning device and the second cleaning device.

Preferably, the system further comprises a power supply and distribution device, the type of the power supply and distribution device is an intelligent alternating current grid-connected control cabinet, the downstream of the filter is communicated with an electric heating heat-preservation water tank in parallel, and a plurality of groups of low-voltage direct current heating type electric heating pipes are arranged in the electric heating heat-preservation water tank; the power supply and distribution device is electrically connected to the solar panel, the inverter and the electric heating pipe, so that direct current of the distributed photovoltaic power generation device can be directly used for heating water in the electric heating heat preservation water tank; when the distributed photovoltaic power generation device is lower than the minimum internet power, the power supply and distribution device switches power to improve the water temperature of the electric heating heat preservation water tank.

Preferably, the distribution density of the plurality of spray heads gradually decreases along the direction from the solar panel to the air inlet.

The technical scheme provided by the application can comprise the following beneficial effects:

the space near the air inlet of the mechanical ventilation cooling tower is shaded by installing the solar panel, so that direct sunlight is avoided, the temperature of air dry balls entering the tower can be obviously reduced in summer, and the propagation of algae and fungi at the air inlet of the mechanical ventilation cooling tower can be reduced to a certain extent; the temperature of the back of the solar cell panel is reduced by utilizing spraying, the photovoltaic power generation capacity can be obviously improved, the temperature of the ambient air is reduced, the temperature of the dry bulb of the air entering the tower of the mechanical ventilation cooling tower is further reduced, and the damp-heat exchange process of the air entering the tower is carried out by moving the air spraying and cooling from the inside of the mechanical ventilation cooling tower to the outside of the tower, which is equivalent to the expansion of the cooling capacity of the filler in the tower, the temperature of the water out of the tower of the mechanical ventilation cooling tower can be obviously reduced, the temperature difference of the water entering the tower is increased, so that the obvious energy-saving effect is generated on a system using the cooling water, especially in summer in high-temperature and high-humidity weather, the energy consumption of the refrigeration equipment using the cooling water is sharply increased due to the overhigh temperature of the refrigerant condensation, the equipment is stopped due to the overhigh temperature of the refrigerant, therefore, compared with other solutions, the cost is lower, and the effect is more remarkable; the photovoltaic power generation is used for the purpose that a small photovoltaic power station and a low-voltage power distribution network run in parallel, self-generation and self-use are realized, no electric energy is output to an external power grid, the small distributed photovoltaic power station is used as a small distributed photovoltaic power station installed on a building roof, generated energy is basically and completely used for self-use during the peak time of power consumption of an enterprise, and the electricity price benefit is high; the water supply device pressurizes and filters a small amount of circulating water in the mechanical ventilation cooling tower and then supplies the circulating water to different water using devices for use.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic plan view of the present photovoltaic power generation in combination with a mechanical draft cooling tower energy saving and efficiency enhancement apparatus shown in accordance with exemplary embodiment 2;

FIG. 2 is a schematic front view of the present photovoltaic power generation in combination with a mechanical draft cooling tower energy saving and efficiency enhancement apparatus, according to some exemplary embodiments;

FIG. 3 is a schematic left side view of the present photovoltaic power generation in combination with a mechanical draft cooling tower energy saving and efficiency enhancement apparatus, according to some exemplary embodiments;

FIG. 4 is a process flow diagram of the present photovoltaic power generation in combination with a mechanical draft cooling tower energy saving and efficiency enhancement apparatus shown in accordance with exemplary embodiment 2;

FIG. 5 is a schematic plan view of the present photovoltaic power generation in combination with a mechanical draft cooling tower energy saving and efficiency enhancement apparatus shown in accordance with exemplary embodiment 3;

FIG. 6 is a schematic plan view of the present photovoltaic power generation in combination with a mechanical draft cooling tower energy saving and efficiency enhancement apparatus shown in accordance with exemplary embodiment 4;

fig. 7 is a schematic plan view of the present photovoltaic power generation and mechanical draft cooling tower combined energy saving and efficiency enhancement apparatus shown in accordance with exemplary embodiment 5.

In the figure:

1. a mechanical draft cooling tower; 101. an air inlet; 102. the tower top; 103. an air duct; 104. an air inlet upper edge; 105. an air inlet lower edge; 2. a solar panel; 201. an array upper edge; 202. the lower edge of the array; 203. a back side; 3. a tower row; 4. a spray cooling device; 401. a spray head; 5. a distributed photovoltaic power generation device; 501. mounting a bracket; 502. an upper end; 503. a lower end; 6. a water supply device; 601. a booster water pump; 602. a source of water supply; 603. a water inlet pipeline; 604. a filter; 611. a first valve; 612. a second valve; 613. a third valve; 614. a fourth valve; 615. a fifth valve; 616. a sixth valve; 7. cleaning the dust removal device; 701. a first cleaning device; 702. a second cleaning device; 8. an electric heating heat preservation water tank; 9. an automatic control device.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus or methods consistent with aspects of the present application.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

Hereinafter, embodiments will be described with reference to the drawings. The embodiments described below do not limit the contents of the invention described in the claims. The entire contents of the configurations shown in the following embodiments are not limited to those required as solutions of the inventions described in the claims.

Referring to fig. 1 to 5, the present embodiment provides an energy saving and efficiency increasing method for combining photovoltaic power generation and a mechanical ventilation cooling tower, which includes:

the method comprises the following steps that a solar panel 2 is arranged above an air inlet area of an air inlet 101 of a mechanical ventilation cooling tower 1 and at the same height position as a tower top 102 of the mechanical ventilation cooling tower 1, the width of the solar panel 2 in the air inlet direction of the air inlet 101 is 2-6 m, and the air inlet area is shaded and cooled through the solar panel 2, wherein the solar panel 2 is formed by splicing a plurality of same components into an array, the installation height of a lower edge 202 of the solar panel array is determined according to the field condition and the installation inclination angle, and the installation height of an upper edge 201 of the array is not higher than an air duct 103 of the mechanical ventilation cooling tower 1;

here, the air intake area of the air intake 101 is an area near the air intake 101, the area is generally above the ground and below the height of the air duct 103, the outside and the side of the air intake 101 are within 4-6 meters, the shaded air intake area forms a shading area, when air is taken in, air in the air intake area enters the air intake 101, and through shading the air intake area, the air in the air intake area can be prevented from being exposed to the sun, and the air temperature in the air intake area can be reduced. When the solar panel 2 is installed, the solar panel can be extended along the air inlet direction of the air inlet 101 as much as possible, so that a good sun-shading and cooling effect is ensured.

The solar cell panel 2 is a flat plate type composed of blocky crystalline silicon, and is used for a small photovoltaic power station and a low-voltage distribution network to run in parallel, and has no self-service and no electric energy output to an external power grid;

a spray cooling device 4 is arranged in the space from the back surface 203 of the solar panel to the air inlet lower edge 105 of the air inlet, the spray cooling device comprises a plurality of groups of fixed medium-high pressure micro-mist type spray heads 401, the back surface temperature of the solar panel and the air temperature of the air inlet area of the air inlet of the mechanical ventilation cooling tower are reduced through high-pressure spray of the spray cooling device, and the spray volume of the spray cooling device is determined according to the environment humidity and/or the air volume of the mechanical ventilation cooling tower;

here, set up spray cooling device 4 in the air inlet region, can reduce the regional temperature of air inlet through the mode of spray cooling to the air temperature that enters into air intake 101 is lower, is favorable to promoting the cooling effect of mechanical draft cooling tower 1.

Installing a water supply device 6 and an automatic control device 9, controlling the water supply device 6 to pressurize and filter circulating water in the mechanical ventilation cooling tower 1 through the automatic control device 9, and then supplying the pressurized and filtered circulating water to the spray cooling device 4 and various water using devices;

the power supply and distribution device is installed, the type of the power supply and distribution device is an intelligent alternating current grid-connected control cabinet, and the power supply and distribution device is used for controlling starting and stopping of various electrical devices.

Wherein, above-mentioned water installation includes mist cooling device 4 and washing dust collector 7, and electric installation includes distributed photovoltaic power generation device's dc-to-ac converter and electric heating pipe of electrical heating holding water box.

The energy saving and efficiency increasing method of combining photovoltaic power generation and mechanical ventilation cooling tower of the present embodiment is specifically described below.

Example 1

As shown in fig. 1 to 3, the mechanical draft cooling tower 1 is classified into two types of square and round in external shape and two types of cross flow and counter flow in internal structure, and the solar cell panel 2 for photovoltaic power generation is generally classified according to the material, the type of packaging, the transmittance of solar cells, and the manner of being combined with a building.

The energy-saving and efficiency-increasing method combining photovoltaic power generation and a mechanical ventilation cooling tower comprises the following steps:

s1, installing a plurality of groups of solar panels 2 near the air inlet 101 of the mechanical ventilation cooling tower 1 and at the same height position as the tower top 102, wherein the width of each solar panel 2 in the air inlet direction is 2-6 m, and the space near the air inlet 101 of the mechanical ventilation cooling tower 1 is shaded by installing the solar panels 2, wherein the solar panels 2 are formed by splicing a plurality of same components into an array; the installation height of the upper edge 201 of the array of the solar panel 2 is not more than the height of the air duct 103 of the mechanical ventilation cooling tower 1, and the installation height of the lower edge 202 of the array of the solar panel 2 is determined according to the field condition and the installation inclination angle of the solar panel 2 assembly.

The mechanical ventilation cooling tower 1 is of a square structure, the mechanical ventilation cooling tower 1 is a single tower or a plurality of towers are combined into a tower row 3, and the tower row 3 can be single or multiple rows.

As an alternative embodiment, the installation height of the solar panel 2 is determined according to the distance between the mechanical draft cooling tower rows 3 and the height of the air inlet upper edge 104 of the air inlet 101: the upper edge 201 of the array of the solar panel 2 should not exceed the height of the air outlet duct 103 of the mechanical ventilation cooling tower 1, and the lower edge 202 of the array of the solar panel 2 should not be lower than the height of the upper air inlet edge 104 of the air inlet 101 of the mechanical ventilation cooling tower 1; the sun-shading area of the air inlet 101 of the mechanical ventilation cooling tower 1 is as large as possible; when the mechanical ventilation cooling tower 1 is in a circular structure or the installation position of the mechanical ventilation cooling tower 1 is deviated from the array of the solar panels 2 or is limited by the surrounding building structure, the combined array of the solar panels 2 can be adjusted according to the actual situation so as to shade the air inlet 101 of the mechanical ventilation cooling tower 1 by more than 2 meters as far as possible.

With the arrangement, when the ambient air temperature around the mechanical ventilation cooling tower 1 reaches 40-44 ℃ in summer, the temperature of the air dry bulb at the air inlet 101 of the mechanical ventilation cooling tower 1 can be reduced by 3-7 ℃ through sunshade.

The solar panel 2 is a flat plate type composed of blocky crystalline silicon, the photovoltaic power generation is used for small photovoltaic power stations and low-voltage power distribution networks to run in parallel, the photovoltaic power stations can be used for self-generation and no power output to external power grids, the photovoltaic power stations are used as small distributed photovoltaic power stations installed on roofs of buildings, generated power is basically and completely used for self-utilization at the peak time of power utilization of enterprises, and the electricity price benefit is high; the most common flat-plate monocrystalline silicon solar cell panel in the market is adopted in the embodiment, so that the cost is low, the service life is long, and the maintenance and the replacement are convenient. As an alternative embodiment, the solar panel 2 may also be made of a polysilicon material.

S2, installing a spray cooling device 4 in the space from the back 203 of the solar panel 2 to the air inlet lower edge 105 of the air inlet 101 of the mechanical ventilation cooling tower 1, wherein the spray cooling device 4 comprises a plurality of groups of pressure spray heads 401, and the type of the spray heads 401 is fixed medium-high pressure micro-fog; the spraying amount is determined according to the environment temperature and humidity and/or the air volume of the mechanical ventilation cooling tower 1.

The number of the atomizing heads 401 mounted on the back surface 203 of the solar panel 2 is the largest, the number of the atomizing heads 401 mounted at the edge of the air intake area is larger, the number of the atomizing heads 401 mounted in the inner space of the air intake area is smaller, and the number of the atomizing heads 401 mounted near the air inlet 101 of the mechanical ventilation cooling tower 1 is the smallest, so that the temperature of the area of the back surface 203 of the solar panel 2 can be the lowest, atomized water vapor can be rapidly diffused into the surrounding environment, and the atomizing and cooling effects are improved; the spraying amount is determined according to the temperature and humidity of the environment, or the air quantity of the mechanical ventilation cooling tower 1 is determined according to 2-6 g of water sprayed and humidified per cubic meter of air.

As an alternative embodiment, high pressure spraying can also be used to enhance the atomization cooling effect, wherein the high pressure is more than 2 MPa.

Here, the spray head 401 can reduce the temperature of the back surface 203 of the solar panel 2 by high-pressure spraying, and at the same time, can reduce the temperature of the air around the air inlet 101 of the mechanical draft cooling tower 1. Moreover, the temperature of the ambient air in the air inlet area can be further reduced by reasonably configuring the spray cooling device 4, and when the relative humidity of the air at the air inlet 101 of the mechanical ventilation cooling tower 1 is 70-95% after the air is subjected to spray cooling, the temperature of the air dry bulb can be reduced by 5-15 ℃. The prior art can be adopted in the method for cooling the outdoor sunshade space by spraying.

And S3, installing a water supply device 6 and an automatic control device 9, wherein the water supply device 6 pressurizes and filters a small amount of circulating water in the mechanical draft cooling tower 1 and then supplies the circulating water to each water using device for use.

Here, the water using device may be set as the spray cooling device 4, or may be set as another water using device, and the water supplying device 6 and the automatic control device 9 adopt the common technology, but since the circulating cooling water contains a large amount of impurities, the circulating cooling water is filtered and then supplied to the water using device. Since the circulating water itself needs to be evaporated and discharged, the circulating water in the mechanical draft cooling tower 1 is used as the water supply source 602 of the water supply device 6, and the water saving effect is significant. Alternatively, other clean water may be used as the water supply source 602 of the water supply device 6.

S4, installing a power supply and distribution device, wherein the power supply and distribution device is an intelligent AC grid-connected control cabinet, and the power supply and distribution device starts and stops different electrical devices through control signals; as an alternative embodiment, a photovoltaic power generation ac distribution box commonly available on the market can be adopted, but an intelligent control device such as a PLC should be added.

Therefore, the electric quantity generated by the distributed photovoltaic power generation devices 5 can be intelligently and evenly adjusted and distributed through the power supply and distribution device, the utilization rate of the electric quantity is ensured, and resources are saved.

According to the arrangement, the space near the air inlet 101 of the mechanical ventilation cooling tower 1 is shaded by mounting the solar panel 2, so that direct sunlight is avoided, the temperature of air dry balls entering the tower can be obviously reduced in summer, and the propagation of algae and fungi at the air inlet 101 of the mechanical ventilation cooling tower 1 can be reduced to a certain extent; the temperature of the back 203 of the solar cell panel 2 is reduced by utilizing spraying, the photovoltaic power generation capacity can be obviously improved, the temperature of the ambient air is reduced, the temperature of the dry bulb of the air entering the mechanical ventilation cooling tower 1 is further reduced, the damp-heat exchange process of the air entering the tower for spraying and cooling is carried out by moving the air entering the tower from the interior of the mechanical ventilation cooling tower 1 to the exterior of the tower, which is equivalent to the expansion of the cooling capacity of the filler in the tower, the temperature of the water leaving the mechanical ventilation cooling tower 1 can be obviously reduced, the temperature difference of the water entering and leaving the tower can be increased, so that the obvious energy-saving effect can be achieved for the system using the cooling water, especially in summer, in high-temperature and high-humidity weather, the energy consumption of the refrigeration equipment using the cooling water can be increased rapidly due to the overhigh temperature of the refrigerant condensing, the user has to add more refrigeration equipment, the operation cost is greatly, thus the cost is lower and the effect is more remarkable compared with other solutions.

In some preferred embodiments, the energy-saving and efficiency-increasing method combining photovoltaic power generation and a mechanical ventilation cooling tower further comprises:

a first cleaning device 701 is installed on the front surface of the solar panel 2, and dust on the surface of the solar panel 2 is cleaned through the first cleaning device 701;

installing a second cleaning device 702 at the air inlet 101 of the mechanical draft cooling tower 1, and cleaning dirt on the filler plate and/or the dust-proof plate at the air inlet 101 through the second cleaning device 702;

the water supply device 6 is controlled by the automatic control device 9 to pressurize and filter the circulating water in the mechanical draft cooling tower 1 and then supply the circulating water to the first cleaning device 701 and the second cleaning device 702.

The first cleaning device 701 and the second cleaning device 702 are arranged as the cleaning and dust removing device 7, and both adopt a mode of cleaning by combining pressure water and a mechanical movement brush.

So set up, the dirt of the air intake 101 of washing mechanical draft cooling tower 1 can improve the air water of mechanical draft cooling tower 1 and the heat exchange efficiency who packs, and the dust of wasing on the solar cell panel 2 can improve the generated energy, and the same set of water supply installation 6 of both sharings can practice thrift the equipment investment.

In some preferred schemes, the energy-saving and efficiency-increasing method combining photovoltaic power generation and a mechanical ventilation cooling tower further comprises the step of installing an electric heating and heat-insulating water tank 8, wherein the type of the electric heating and heat-insulating water tank 8 is a low-voltage direct-current heating type water tank, a power distribution device uses low-power photovoltaic electric energy which cannot be on line in the morning and evening to heat water in the electric heating and heat-insulating water tank 8, and when the water supply device 6 needs hot water, an automatic control device 9 determines whether to open a pipeline valve of a related water supply device according to the water temperature in the electric heating and heat-insulating water tank 8; hot water in the electric heating and heat-preserving water tank 8 is used for cleaning dirt of the photovoltaic solar panel 2 and an air inlet 101 of the mechanical ventilation cooling tower 1, and the temperature of the cleaning water is usually 40-60 ℃; alternatively, the hot water in the electrically heated holding water tank 8 may be sent to other external devices.

So set up, when washing dust collector 7 needs hot water, whether the automatic control device 9 confirms to open relevant water supply installation's pipeline valve according to the temperature in the electrical heating holding water box 8, can realize automatic operation, and the economic benefits that can improve photovoltaic power generation can be prepared hot water to the low-power photovoltaic electric energy that can not surf the net, adopts that hot water washing effect is good, reduces washing work load and power consumption.

In some preferred schemes, the automatic control device 9 controls the water supply device 6 to supply water to the spray cooling device 4 in summer and daytime in high temperature period to cool by spraying, and supplies water to the first cleaning device 701 in idle time to clean the solar panel 2, or supplies water to the second cleaning device 702 to clean the air inlet 101 of the mechanical ventilation cooling tower 1.

Specifically, the high-temperature period in summer is usually 9:00-18:00 in 5-9 months, the cleaning of the air inlet 101 of the mechanical ventilation cooling tower 1 is usually performed once a week and is scheduled to be performed automatically in 1:00-4:00 in the morning, and the cleaning and dust removal of the solar panel 2 are performed once a day and is scheduled to be performed automatically in 5:00-6:00 in the morning.

So set up, can make water supply installation 6 open the operation in the time of needs, avoid operating duration conflict and unnecessary operation, further promote the operation benefit.

The energy-saving and efficiency-increasing device combining photovoltaic power generation and a mechanical ventilation cooling tower of the embodiment is specifically described below.

Example 2

The invention provides an energy-saving and efficiency-increasing device combining photovoltaic power generation and a mechanical ventilation cooling tower, which comprises a mechanical ventilation cooling tower 1, a distributed photovoltaic power generation device 5, a spray cooling device 4, a water supply device 6 and an automatic control device 9 as shown in figures 1-4, wherein the distributed photovoltaic power generation device 5 comprises a plurality of groups of solar panels 2, a mounting bracket 501, an inverter, a power supply and distribution circuit and the like, the solar panels 2 are arranged near an air inlet 101 of the mechanical ventilation cooling tower 1 and at the same height with the tower top 102, the sun-shading width of the solar panels 2 in the air inlet direction is 2-6 meters, and the solar panels 2 are arranged above the air inlet area of the air inlet 101 of the mechanical ventilation cooling tower 1.

The solar panel 2 is higher than the upper air inlet edge 104 of the air inlet 101 and lower than the air duct 103 of the mechanical ventilation cooling tower 1, so as to ensure that the air inlet area of the air inlet 101 can be sufficiently shaded, provide more air inlet channels and avoid sucking the damp and hot air exhausted by the cooling tower again; the spray cooling device 4 is arranged in the space from the back 203 of the solar panel 2 to the air inlet lower edge 105 of the air inlet 101 and is used for carrying out spray cooling treatment on the air in the air inlet area so as to ensure that the temperature of the air sucked by the air inlet 101 is lower; the water supply device 6 is communicated between the mechanical ventilation cooling tower 1 and the spray cooling device 4, the automatic control device 9 is in communication connection with the water supply device 6, and under the control action of the automatic control device 9, the water supply device 6 pressurizes, filters and conveys circulating water in the mechanical ventilation cooling tower 1 to the spray cooling device 4 so as to realize spray cooling; the water supply device 6 is communicated between the mechanical ventilation cooling tower 1 and the cleaning and dust removing device 7, the automatic control device 9 is in communication connection with the water supply device 6, and under the control action of the automatic control device 9, the water supply device 6 pressurizes and filters circulating water in the mechanical ventilation cooling tower 1 and conveys the circulating water to the cleaning and dust removing device 7 so as to realize cleaning and dust removing.

According to the arrangement, the space near the air inlet 101 of the mechanical ventilation cooling tower 1 is shaded by mounting the solar panel 2, so that direct sunlight is avoided, the temperature of air dry balls entering the tower can be obviously reduced in summer, and the propagation of algae and fungi at the air inlet 101 of the mechanical ventilation cooling tower 1 can be reduced to a certain extent; the temperature of the back 203 of the solar cell panel 2 is reduced by utilizing spraying, the photovoltaic power generation capacity can be obviously improved, the temperature of the ambient air is reduced, the temperature of the dry bulb of the air entering the mechanical ventilation cooling tower 1 is further reduced, the damp-heat exchange process of the air entering the tower for spraying and cooling is carried out by moving the air entering the tower from the interior of the mechanical ventilation cooling tower 1 to the exterior of the tower, which is equivalent to the expansion of the cooling capacity of the filler in the tower, the temperature of the water leaving the mechanical ventilation cooling tower 1 can be obviously reduced, the temperature difference of the water entering and leaving the tower can be increased, so that the obvious energy-saving effect can be achieved for the system using the cooling water, especially in summer, in high-temperature and high-humidity weather, the energy consumption of the refrigeration equipment using the cooling water can be increased rapidly due to the overhigh temperature of the refrigerant condensing, the user has to add more refrigeration equipment, the operation cost is greatly, therefore, compared with other solutions, the cost is lower, and the effect is more remarkable; the photovoltaic power generation is used for the purpose that a small photovoltaic power station and a low-voltage power distribution network run in parallel, self-generation and self-use are realized, no electric energy is output to an external power grid, the small distributed photovoltaic power station is used as a small distributed photovoltaic power station installed on a building roof, generated energy is basically and completely used for self-use during the peak time of power consumption of an enterprise, and the electricity price benefit is high; the water supply device utilizes the water pump to pressurize and supply water, the water supply pressure and flow can be simultaneously suitable for spray cooling and cleaning and descaling, and automatic operation can be conveniently realized through the automatic control device.

In this embodiment, the mechanical draft cooling tower 1 is a square cross flow packed tower, the cooling water amount of a single mechanical draft cooling tower is 100-.

The solar cell panel 2 is a flat-plate monocrystalline silicon solar cell panel, the module size of each panel is 1956X 996X 50mm, when in installation, the solar cell panel 2 is transversely arranged on the installation support 501, namely, one solar cell panel 2 is installed along the installation inclination angle of the solar cell panel array from top to bottom approximately every meter, one solar cell panel 2 is installed along the long axis direction of the tower row 3 every two meters, the south side part of the installation support 501, the upper end 502 of the installation support 501 is fixed by the upper inlet edge 104 of the south side air inlet 101 of the mechanical ventilation cooling tower 1 and extends upwards to not exceed the height of the air duct 103, if the tower top 102 is provided with a safety guardrail, the upper end 502 can also be installed after being reinforced by the safety guardrail, the lower end 503 of the installation support 501 is determined according to the sun-shading range on site, the north side part of the installation support 501, the upper end 502 is fixedly supported to the building, the horizontal distance from the air inlet 101 at the north side of the tower row 3 is about 1.5-2.5 meters.

The lower edge 202 of the array of the solar cell panel 2 on the north side of the mechanical ventilation cooling tower 1 is to prevent the tower body of the tower row 3 and the air duct 103 from blocking sunlight, the horizontal distance from the air inlet 101 on the north side of the tower row 3 is about 0.5-1 meter, and the installation height is not lower than the air inlet upper edge 104 of the air inlet 101 on the north side of the tower row 3.

In some embodiments, the energy-saving and efficiency-increasing device combining photovoltaic power generation and a mechanical ventilation cooling tower further comprises a cleaning and dust-removing device 7, which is a type of cleaning combining pressurized water and a mechanical moving brush, which are commonly used in the market, and comprises a guide rail, a reciprocating mechanism, a water spraying pipeline, a brush moving mechanism, an electrical control circuit and the like, specifically, the cleaning and dust-removing device 7 comprises two parts, wherein: the first cleaning device 701 is used for cleaning dust on the surface of the solar panel 2; the second cleaning device 702 is used for cleaning dirt on a filler plate and/or a vertically arranged dust guard plate at the air inlet 101 of the mechanical draft cooling tower 1;

wherein, the guide rail and the reciprocating mechanism of the cleaning and dust removing device 7 are as long as possible to improve the cleaning efficiency and save the equipment investment, and the water supply of the cleaning and dust removing device 7 is provided by the water supply device 6.

As shown in fig. 4, the water supply device 6 includes a booster water pump 601 and a filter 604, a water inlet end of the booster water pump 601 is communicated with the mechanical ventilation cooling tower 1, a water outlet end is communicated with the filter 604, and the filter 604 is communicated with the spray cooling device 4, the first cleaning device 701 and the second cleaning device 702, so that after the booster water pump 6 is pressurized and filtered, water is delivered to the spray cooling device 4, the first cleaning device 701 and the second cleaning device 702 for utilization, and the equipment utilization rate of the water supply device is greatly improved.

Here, the water supply device 6 may further include a pipe valve and an electric control line.

The booster water pump 601 is a centrifugal multistage pump type, the booster water pump 601 is started or stopped through an electric control circuit, the selection of the booster water pump 601 in the embodiment is determined according to spray pressure and spray amount, the common water supply amount of a mechanical ventilation cooling tower system with the total air volume of 100 ten thousand square/Hr is about 3-5 tons/Hr, the common water supply pressure is 0.8-1.2MPa, and a water supply source 602 of the booster water pump 601 is connected with a water inlet pipeline 603 of the mechanical ventilation cooling tower 1; the filter 604 is a disc filter or a laminated filter, and has the advantages of high filtering precision, full-automatic operation, long service life and less maintenance, and pressurized and filtered water is sent to water using equipment with different purposes through a pipeline and a control valve.

As an optional implementation manner, the booster water pump 601 may be configured singly or as one-for-one-standby, and when a large flow and high pressure spray cooling is required, two pumps may be simultaneously started; of course, the water supply source 602 of the booster pump 601 may also be connected to the water outlet pipeline or the water collecting tank of the mechanical draft cooling tower 1.

In some embodiments, the spray cooling device 4 comprises a plurality of sets of pressure spray heads 401, and the spray heads 401 are arranged in the space from the back side 203 of the solar panel 2 to the air inlet lower edge 105 of the air inlet 101 of the mechanical ventilation cooling tower 1; the distribution density of the spray head 401 gradually decreases along the direction from the solar panel 2 to the air inlet 101.

Wherein, the type of pressure atomising head 401 is fixed medium pressure little fog spray cooling type, and spray cooling device 4 can also include connecting line, spraying control valve, spray filter etc..

Specifically, the spray heads 401 are fixedly arranged on the back surface 203 of the solar panel 2, and the number of the spray heads per square meter is 4 on average; the spray heads 401 are fixedly arranged at the edge of the sunshade area, and the number of the spray heads per square meter is 2 on average; the spray heads 401 are fixedly arranged in the inner space of the sunshade area, and the average number of the spray heads per cubic meter is 0.2; the spray head 401 of the installation position, which is positioned at the air inlet lower edge 105 of the air inlet 101 of the mechanical ventilation cooling tower 1, sprays upwards, and the spray head 401, which is close to the air inlet 101 of the mechanical ventilation cooling tower 1, sprays towards the outer side of the air inlet area.

The arrangement can ensure that the temperature of the area on the back 203 of the solar panel 2 is the lowest, and the atomized water vapor can be rapidly diffused to the surrounding environment, so that the effect of spray cooling is improved.

The water supply device 6 pressurizes the water on the water inlet pipe of the mechanical ventilation cooling tower 1 to 0.4-2.0MPa for the spray cooling device 4 to use, and the water supply device 6 can also pressurize part of the water on the water inlet pipe of the mechanical ventilation cooling tower 1 to 0.4-2.0MPa for the cleaning and dust removal device 7 to use.

The energy-saving and efficiency-increasing device combining the photovoltaic power generation and the mechanical ventilation cooling tower further comprises an electric heating heat-preservation water tank 8, a plurality of groups of electric heating pipes are arranged in the electric heating heat-preservation water tank 8, the type of the electric heating pipes is a low-voltage direct-current heating type, direct current of the distributed photovoltaic power generation device 5 can be directly used for heating water in the electric heating heat-preservation water tank 8, the power supply voltage of the electric heating pipes is 0-70V, the water in the electric heating heat-preservation water tank 8 is heated to 40-80 ℃ in an electric heating mode, and the water is used by the cleaning and dust removing device 7; the water capacity of the electric heating heat-preservation water tank 8 is determined according to the water consumption of the cleaning and dust removing device 7; the electric heating heat preservation water tank 8 also comprises a common automatic water replenishing pipeline, an anti-dry heating and anti-overtemperature electric control circuit and the like.

In some preferred schemes, the energy-saving and efficiency-increasing device combining the photovoltaic power generation and the mechanical ventilation cooling tower further comprises a power supply and distribution device, wherein the power supply and distribution device is electrically connected to the solar panel 2, the inverter and the electric heating and heat preservation water tank 8. The type of the power supply and distribution device is an intelligent AC grid-connected control cabinet, and the power supply and distribution device also has the following functions: when the photovoltaic power generation power is lower than the minimum internet power, the power can be switched to improve the water temperature in the electric heating heat-preservation water tank 8.

Specifically, the power supply and distribution device at least comprises a photovoltaic power generation power detection module, a heat preservation water tank electric heater power on-off module and an inverter power on-off module, when the photovoltaic power generation power detection module detects that the total photovoltaic power generation power is lower than the minimum internet power, the inverter power on-off module cuts off the power supply of the inverter, and the heat preservation water tank electric heater power on-off module electrically connects the power of the solar panel assembly to an electric heating pipe of the electric heating heat preservation water tank 8 at a voltage not exceeding 70V according to the signal of the automatic control device 9 and is used for improving the water temperature in the electric heating heat preservation water tank; when the photovoltaic power generation power detection module detects that the total photovoltaic power generation power is higher than the minimum internet power, the power-on module of the inverter is connected with the power supply of the inverter, and the power-on module of the electric heater of the heat preservation water tank is disconnected with the power supply of the electric heating pipe of the electric heating heat preservation water tank.

Of course, the automatic control device 9 can automatically control the water supply device 6, the spray cooling device 4, the start and stop of hot water supply in the cleaning and dust removing device 7 and the electric heating and heat-preserving water tank 8 according to the temperature, the humidity and the time of day of the ambient air, the automatic control device 9 at least comprises a time detection module, an air temperature and humidity detection module, a water temperature detection module, a controller module and an automatic execution module, the automatic control device 9 adopts a common PLC type, and the automatic control device 9 is used for controlling the operation of the water supply device 6, the spray cooling device 4, the electric heating and heat-preserving water tank 8 and the cleaning and dust removing device 7.

The operation process of the present embodiment is described in detail below with reference to fig. 1 to 4:

after the PLC of the automatic control device 9 is operated, different operation modes are selected according to the detection signal, including but not limited to:

spray cooling mode of operation

Conditions for activation and initiation: the time detection module detects that the date is 5-9 months per year and the time is 9:00-18:00, simultaneously, the air temperature and humidity detection module detects that the air temperature is higher than 30 ℃, and the relative humidity of the air is lower than 90%.

The operation process comprises the following steps: firstly, before operation, the automatic execution module keeps all automatic control valves normally closed, including a first valve 611-a sixth valve 616 and the like, then opens the first valve 611, the fourth valve 614 and the spray control valve of the spray cooling device 4, and supplies power to the booster water pump 601 and the filter 604, at this time, after the water supply source 602 on the water inlet pipeline 603 from the mechanical ventilation cooling tower 1 is boosted by the booster water pump 601, the water supply source flows through the filter 604, the pipeline where the first valve 611 is located, the pipeline where the fourth valve 614 is located, the pipeline where the spray control valve is located, the spray filter, the plurality of connecting pipelines and the plurality of spray heads 401 in sequence, micro-mist of 30-100 μm is formed in a sun-shading area, a remarkable evaporation cooling effect is formed on air entering the tower, the operation control of the filter 604 adopts the existing common technology, and is not repeated here.

Stopping conditions are as follows: the prior art is adopted, and the details are not repeated here.

Solar panel cleaning mode

Conditions for activation and initiation: the time detection module detects that the time is 5:00-6:00 per day.

The operation process comprises the following steps: firstly, the automatic execution module keeps all automatic control valves normally closed before running, then opens the first valve 611 and the fifth valve 615, and then the PLC selects different operation steps according to the water temperature of the electric heating holding water tank 8 detected by the water temperature detection module: the first valve 611 is kept open and the second valve 612 and the third valve 613 are opened when the water temperature is > 60 c, the second valve 612 and the third valve 613 are opened and the first valve 611 is closed when the water temperature is 40-60 c, and the first valve 611 is opened and the second valve 612 and the third valve 613 are closed when the water temperature is < 40 c. Then the PLC supplies power to the booster water pump 601, the filter 604 and the first cleaning device 701, at this time, after the water supply source 602 on the water inlet pipe 603 from the mechanical ventilation cooling tower 1 is pressurized by the booster water pump 601, the water supply source successively flows through the filter 604, the pipe where the first valve 611 is located, and/or the pipe where the electric heating heat preservation water tank 8 and the fifth valve 615 are located, and when the mechanical movement brush of the first cleaning device 701 performs a reciprocating cleaning process, the surface of the solar panel 2 is washed by the ejected pressure water flow at the same time, the operation control of the first cleaning device 701 and the electric heating heat preservation water tank 8 adopts the existing common technology, and details are not repeated here.

It should be noted that when there are more than one set of the first washing device 701, the PLC schedules the washing operation at different time periods by adding an automatic control valve in parallel with the fifth valve 615, respectively.

Mechanical ventilation cooling tower air inlet cleaning mode

Conditions for activation and initiation: the time detection module detects that the date is on Saturday of the week and the time is 1:00-4:00 of the day.

The operation process comprises the following steps: firstly, the automatic execution module keeps all automatic control valves normally closed before running, then opens the first valve 611 and the sixth valve 616, and then the PLC selects different operation steps according to the water temperature of the electric heating heat preservation water tank 8 detected by the water temperature detection module: the first valve 611 is kept open and the second valve 612 and the third valve 613 are opened when the water temperature is > 60 c, the second valve 612 and the third valve 613 are opened and the first valve 611 is closed when the water temperature is 40-60 c, and the first valve 611 is opened and the second valve 612 and the third valve 613 are closed when the water temperature is < 40 c. Then the PLC supplies power to the booster water pump 601, the filter 604 and the second cleaning device 702, at this time, after the water supply source 602 on the water inlet pipe 603 from the mechanical ventilation cooling tower 1 is pressurized, the pressurized water flows through the filter 604, the pipe where the first valve 611 is located and/or the pipe where the electric heating heat preservation water tank 8 and the sixth valve 616 are located and the plurality of water spraying pipes, when the mechanical moving brush of the second cleaning device 702 performs the reciprocating cleaning process, the ejected pressure water flows to simultaneously flush the dirt on the surface of the air inlet 101 of the mechanical ventilation cooling tower 1, and the operation control of the second cleaning device 702 and the electric heating heat preservation water tank 8 adopts the conventional technology, which is not described herein again.

It should be noted that when there are multiple sets of second cleaning device 702, the PLC schedules the cleaning operation on different days of the week or at different time periods by adding an automatic control valve in parallel with the sixth valve 616.

Example 3

As shown in fig. 1 to 5, when there are two or more rows of tower rows 3 of the mechanical draft cooling tower 1 in embodiment 2, the upper end 502 of the mounting bracket 501 located between the two rows of tower rows 3 is fixed by the upper inlet air edge 104 of the south air inlet 101 of the mechanical draft cooling tower 1 and extends upward not more than the height of the air duct 103, the lower end 503 of the mounting bracket 501 is fixed on the installation ground of the mechanical draft cooling tower 1, the horizontal distance from the north air inlet 101 of the south tower row 3 is about 1.5 to 2.5 meters, and the lower array edge 202 of the solar panel 2 after installation is to prevent the tower body of the tower row 3 and the air duct 103 from blocking the sunlight, and the installation height is not lower than the upper inlet air edge 104 of the north air inlet 101 of the south tower row 3.

As an alternative embodiment, when the spacing between the two rows of tower rows 3 is large, the solar panel array for shading sun may be installed in two rows.

The description of embodiment 2 can be referred to for matters which are not reached in this embodiment.

Example 4

As shown in fig. 6, when the long axis of the tower row 3 of the mechanical draft cooling tower 1 in embodiment 1 is oriented north and south, and the air inlet 101 is oriented east and west, the array of solar panels 2 for shading sun should be installed in multiple rows along the long axis of the tower row 3, that is: under the condition that the height of the upper end 502 of the mounting bracket 501 does not exceed the height of the air duct 103 of the mechanical ventilation cooling tower 1 and the height of the lower edge 202 of the array of the solar panels 2 is not lower than the height of the upper edge 104 of the air inlet 101 of the mechanical ventilation cooling tower 1, the solar panels are divided into a plurality of rows according to the conventional requirements of the photovoltaic industry.

As an alternative embodiment, since the solar panel array is installed in multiple rows, the first cleaning device 701 is also provided with multiple sets, and the first cleaning device 701 may not be provided for economic and efficiency reasons unless the length of the single row solar panel 2 array exceeds more than 6 meters.

Example 5

As shown in fig. 7, when the mechanical ventilation cooling tower 1 in embodiment 1 is circular and/or has four sides to wind, the solar panel array for shading sun can be arranged according to the descriptions in embodiment 2 and embodiment 3, and the area around the circular mechanical ventilation cooling tower 1 which cannot be shaded has little influence on the beneficial effect of the invention, and can not be processed.

As an alternative embodiment, the guide rails and the reciprocating mechanism of the second cleaning device 702 of the air inlet 101 of the mechanical draft cooling tower 1 should be customized according to the field situation of the circular mechanical draft cooling tower 1, and the second cleaning device 702 may not be provided if no cleaning is necessary.

The matters that are not reached in the present embodiment can be referred to the descriptions in embodiment 2 and embodiment 3.

It should be noted that the terms "first," "second," and the like, as used herein, are not intended to limit the specific order, but merely to distinguish one element or function from another. The stated horizontal, vertical, up, down, left and right are indicated when the energy-saving synergistic device combining the photovoltaic power generation and the mechanical ventilation cooling tower is in a natural placing state.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments. The multiple schemes provided by the application comprise basic schemes of the schemes, are independent of each other and are not restricted to each other, but can be combined with each other under the condition of no conflict, so that multiple effects are achieved together.

While embodiments of the present application have been shown and described above, it is to be understood that the above embodiments are exemplary and not to be construed as limiting the present application, and that changes, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.

Claims

1. A method for energy conservation and efficiency improvement by combining photovoltaic power generation and a mechanical ventilation cooling tower is characterized by comprising the following steps:

the method comprises the steps that a solar panel (2) is arranged above an air inlet area of an air inlet (101) of a mechanical ventilation cooling tower (1) and at the same height position as a tower top (102) of the mechanical ventilation cooling tower (1), the width of the solar panel (2) in the air inlet direction of the air inlet (101) is 2-6 m, the air inlet area is shaded and cooled through the solar panel (2), the solar panel (2) is assembled into an array by a plurality of identical components, the installation height of an array lower edge (202) of the solar panel (2) is determined according to the field condition and the installation inclination angle, and the installation height of an array upper edge (201) is not higher than an air duct (103) of the mechanical ventilation cooling tower (1);

the solar panel (2) is a flat plate type composed of blocky crystalline silicon, and is used for a small photovoltaic power station and a low-voltage distribution network to run in parallel, and for spontaneous self-use and no electric energy output to an external power grid;

a spray cooling device (4) is arranged in a space from the back surface (203) of the solar panel (2) to the air inlet lower edge (105) of the air inlet (101), the spray cooling device (4) comprises a plurality of groups of fixed medium-high pressure micro-fog type spray heads (401), the back surface temperature of the solar panel (2) and the air temperature of the air inlet area of the air inlet (101) of the mechanical ventilation cooling tower (1) are reduced through high-pressure spray of the spray cooling device (4), and the spray amount of the spray cooling device (4) is determined according to the ambient humidity and/or the air volume of the mechanical ventilation cooling tower (1);

installing a water supply device (6) and an automatic control device (9), controlling the water supply device (6) through the automatic control device (9) to pressurize and filter circulating water in the mechanical ventilation cooling tower (1) and then supplying the circulating water to the spray cooling device (4) and various water consumption devices;

2. The energy-saving and efficiency-increasing method combining photovoltaic power generation and a mechanical draft cooling tower according to claim 1, further comprising:

a first cleaning device (701) is arranged on the front surface of the solar panel (2), and dust on the surface of the solar panel (2) is cleaned through the first cleaning device (701);

installing a second cleaning device (702) at an air inlet (101) of the mechanical ventilation cooling tower (1), and cleaning dirt on a filler plate and/or a dust-proof plate at the air inlet (101) through the second cleaning device (702);

the automatic control device (9) controls the water supply device (6) to pressurize and filter circulating water in the mechanical ventilation cooling tower (1) and then supply the circulating water to the first cleaning device (701) and the second cleaning device (702).

3. The energy-saving and efficiency-increasing method combining photovoltaic power generation and a mechanical ventilation cooling tower, according to claim 2, is characterized by further comprising the following steps:

the solar water heater is characterized in that an electric heating heat preservation water tank (8) is installed, the type of the electric heating heat preservation water tank (8) is a low-voltage direct-current heating type, the power supply and distribution device is used for heating water in the electric heating heat preservation water tank (8) by using low-power photovoltaic electric energy of the solar cell panel (2) which is not connected to the internet, the water in the electric heating heat preservation water tank (8) is heated to 40-80 ℃, and when the water supply device (6) needs hot water, the automatic control device (9) determines whether to open a pipeline valve of the water supply device (6) according to the water temperature in the electric heating heat preservation water tank (8).

4. The energy-saving and efficiency-increasing method combining photovoltaic power generation and a mechanical ventilation cooling tower is characterized in that the automatic control device (9) controls the water supply device (6) to convey water in the electric heating and heat-preservation water tank (8) to the first cleaning device (701) and the second cleaning device (702).

5. The energy-saving and efficiency-increasing method combining photovoltaic power generation and a mechanical ventilation cooling tower according to claim 4, characterized in that the water supply device (6) is controlled by the automatic control device (9), water is supplied to the spray cooling device (4) for spray cooling during the high-temperature period in summer and daytime, water is supplied to the first cleaning device (701) for cleaning the solar panel (2) during the vacant time, or water is supplied to the second cleaning device (702) for cleaning the air inlet (101) of the mechanical ventilation cooling tower (1).

6. An energy-saving and efficiency-improving device combining photovoltaic power generation and a mechanical ventilation cooling tower is characterized in that based on the energy-saving and efficiency-improving method combining photovoltaic power generation and the mechanical ventilation cooling tower as claimed in any one of claims 1 to 5, the energy-saving and efficiency-improving device comprises a mechanical ventilation cooling tower (1), a distributed photovoltaic power generation device (5), a spray cooling device (4), a water supply device (6) and an automatic control device (9), wherein the distributed photovoltaic power generation device (5) comprises a solar panel (2) which is arranged above an air inlet area of an air inlet (101) of the mechanical ventilation cooling tower (1) and is used for shading the air inlet area of the air inlet (101) and is as high as the tower top (102) of the mechanical ventilation cooling tower (1), a mounting bracket (501) which is positioned below the solar panel (2), an inverter and a power supply and distribution circuit, the solar cell panel (2) is formed by splicing a plurality of same components into an array, the width of the solar cell panel in the air inlet direction of the mechanical ventilation cooling tower (1) is 2-6 m, the installation height of the lower edge (202) of the array of the solar panel (2) is determined according to the field condition and the installation inclination angle, and the installation height of the upper edge (201) of the array is not higher than the air duct (103) of the mechanical ventilation cooling tower (1), the spray cooling device (4) comprises a plurality of groups of fixed medium-high pressure micro-fog type spray heads (401) and is arranged in the space from the back (203) of the solar panel (2) to the air inlet lower edge (105) of the air inlet (101), the water supply device (6) is communicated between the mechanical ventilation cooling tower (1) and the spray cooling device (4), the automatic control device (9) is connected with the water supply device (6) in a communication way.

7. The energy-saving and efficiency-improving device combining photovoltaic power generation and mechanical ventilation cooling tower is characterized in that the front surface of the solar panel (2) is provided with a first cleaning device (701) for cleaning dust on the surface of the solar panel (2), the air inlet (101) of the mechanical ventilation cooling tower (1) is provided with a second cleaning device (702) for cleaning dirt on a filler plate and/or a dust-proof plate at the air inlet (101), and the first cleaning device (701) and the second cleaning device (702) are communicated with the mechanical ventilation cooling tower (1) through the water supply device (6); the first cleaning device (701) and the second cleaning device (702) respectively comprise a guide rail, a reciprocating mechanism, a water spraying pipeline, a brush moving mechanism and an electric control circuit.

8. The energy-saving and efficiency-increasing device combining photovoltaic power generation and a mechanical ventilation cooling tower is characterized in that the water supply device (6) comprises a booster water pump (601), a filter (604) and a pipeline valve, the water inlet end of the booster water pump (601) is communicated with the mechanical ventilation cooling tower (1), the water outlet end of the booster water pump is communicated with the filter (604), and the filter (604) is communicated with the spray cooling device (4), the first cleaning device (701) and the second cleaning device (702); the water supply device (6) pressurizes water on a water inlet pipeline (603) of the mechanical ventilation cooling tower (1) to 0.4-2MPa and conveys the water to the spray cooling device (4), the first cleaning device (701) and the second cleaning device (702).

9. The energy-saving and efficiency-improving device combining photovoltaic power generation and a mechanical ventilation cooling tower according to claim 8, characterized by further comprising a power supply and distribution device, wherein the type of the power supply and distribution device is an intelligent AC grid-connected control cabinet, an electric heating and heat-preserving water tank (8) is connected in parallel and communicated with the downstream of the filter (604), and a plurality of groups of low-voltage DC heating type electric heating pipes are arranged in the electric heating and heat-preserving water tank (8); the power supply and distribution device is electrically connected to the solar panel (2), the inverter and the electric heating pipe, so that direct current of the distributed photovoltaic power generation device (5) can be directly used for heating water in the electric heating heat preservation water tank (8); when the distributed photovoltaic power generation device (5) is lower than the minimum internet power, the power supply and distribution device switches power to improve the water temperature of the electric heating heat preservation water tank (8).

10. The energy-saving and efficiency-improving device combining photovoltaic power generation and mechanical ventilation cooling tower is characterized in that the distribution density of the plurality of spraying heads (401) is gradually reduced along the direction from the solar panel (2) to the air inlet (101).