CN104654499A - Air conditioning system capable of combining dew point evaporative cooling and solar combined heat and power generation - Google Patents

Abstract

The invention discloses an air conditioning system capable of combining dew point evaporative cooling and solar combined heat and power generation. The air conditioning system comprises a solar combined heat and power generation system, wherein the solar combined heat and power generation system is connected to a dew point evaporative cooling air conditioning unit, a plate heat exchanger, a thermal storage tank and a floor radiant tube through a water pipe network. According to the air conditioning system capable of combining dew point evaporative cooling and solar combined heat and power generation, a clean energy, namely solar power is utilized, the generation of solar thermoelectricity is guaranteed through the special structural design, meanwhile, through combination with evaporative cooling, the energy waste is prevented, and the effects of heating and refrigeration in winter and summer are realized.

Description

Air Conditioning System Combining Dew Point Evaporative Cooling and Solar Heat and Power Cogeneration

technical field

The invention belongs to the technical field of air-conditioning equipment, and in particular relates to an air-conditioning system combining dew point evaporative cooling and solar heat and power cogeneration.

Background technique

Generally, the solar cells used in photovoltaic power generation systems are monocrystalline silicon or polycrystalline silicon laid on a plane. Because of the plate structure, they take up a lot of space when used; in addition, the photovoltaic power generation system with this structure is unstable and susceptible to damage. Geographical restrictions on solar distribution. In recent years, the emerging thin-film solar cells can be laid on non-planar structures due to their flexibility, which can be flexibly arranged and widely used.

As we all know, when solar energy is used as clean energy, photovoltaic power generation only utilizes a small part of solar energy, and most of the solar energy is mainly lost in the form of radiant heat. If the radiant heat of solar energy is utilized by some means, we can maximize the use of solar energy resources and better serve our lives.

Dew-point evaporative cooling air conditioners are based on evaporative cooling technology, which mainly uses dry air energy and uses the temperature difference between dry and wet bulbs of outdoor air as the driving potential for air conditioning. The dew point evaporative cooling air conditioner is not only compact in structure, but also has the characteristics of remarkable cooling effect; but the temperature of the secondary air discharged by it is low, it is not well utilized, and there is a phenomenon of energy waste.

Contents of the invention

The purpose of the present invention is to provide an air-conditioning system combining dew point evaporative cooling and solar heat and power cogeneration, using solar heat and power cogeneration to provide electric energy and hot water for dew point evaporative cooling air conditioners, so as to maximize the use of solar resources and achieve winter, Summer dual-purpose effect.

The technical scheme adopted in the present invention is that the air-conditioning system combining dew point evaporative cooling and solar cogeneration includes a solar cogeneration system, and the solar cogeneration system passes through the water pipe network and dew point evaporative cooling air conditioning unit, plate heat exchanger, Heat storage tank and floor radiant tube connections.

The present invention is also characterized in that:

The water outlet of the solar cogeneration system is connected to the plate heat exchanger through the hot water pipe; the plate heat exchanger is connected to the heat storage tank through the first water pipe; the heat storage tank is connected to the third water pipe, and the hot water pipe is connected to the heat storage tank through the second water pipe. The third water pipe is connected;

The third water pipe is connected to the micro-channel heat exchanger in the dew point evaporative cooling air-conditioning unit through the fourth water pipe, and the micro-channel heat exchanger is connected to the water inlet pipe of the solar cogeneration system through the sixth water pipe;

The third water pipe is also connected to the water inlet of the floor radiant pipe through the fifth water pipe, and the water outlet of the floor radiant pipe is connected to the return water pipe through the seventh water pipe.

The plate heat exchanger is respectively connected with a shower nozzle and a municipal water supply pipe.

The solar cogeneration system includes a solar cogeneration unit and a concentrator; the solar cogeneration unit is connected to the concentrator through a fixed bracket, and the solar cogeneration unit is supported on a pillar.

The solar heat and power cogeneration unit includes a plurality of metal round tubes connected end to end in sequence. The outer wall of each metal round tube is wrapped with a thin-film solar cell. The thin-film solar cell is connected to the power supply control unit and the dew point evaporative cooling air-conditioning unit in turn through wires. ;

A circle of low-resistance heat transfer tubes is arranged inside each metal round tube along the inner wall of the metal round tube; the low-resistance heat transfer tubes in multiple metal round tubes are connected by flexible pipes.

The power supply control unit is composed of a controller and a high-energy storage battery connected together through a power line;

The dew-point evaporative cooling air-conditioning unit includes an organic unit shell, and an air inlet is arranged on the side wall of the unit shell; a dew-point evaporative cooling unit is arranged inside the unit shell, and a water baffle and a micro-channel switch are respectively arranged above the dew-point evaporative cooling unit. The heater, the water baffle and the micro-channel heat exchanger are arranged side by side and connected together; a primary fan is arranged above the water baffle, and a secondary fan is arranged above the micro-channel heat exchanger;

The side wall of the unit housing corresponding to the primary fan is provided with an air outlet, and the top wall of the unit housing corresponding to the secondary fan is provided with an air outlet;

Both the primary fan and the secondary fan are connected to the controller through the power line.

The air supply port is arranged opposite to the air inlet port.

A filter screen is arranged in the air inlet.

The dew point evaporative cooling unit includes a tubular heat exchange core. The tubular heat exchange core is composed of a number of ceramic oval tubes arranged horizontally. The surface of the tubular heat exchange core is from bottom to top along the direction of primary air flow. The corner line is provided with a row of small holes;

A water distributor is arranged above the tubular heat exchange core, and the water distributor is composed of a water distribution pipe and a plurality of spray nozzles evenly arranged on the water distribution pipe facing the tubular heat exchange core;

A water pool is arranged below the tubular heat exchange core, and the water pool is connected to the water distribution pipe through a water supply pipe; a DC water pump a is arranged on the water supply pipe in the pool; the DC water pump a is connected to the controller through a power line.

A check valve is installed on the hot water pipe;

The third water pipe is provided with a DC water pump b;

The fourth water pipe is provided with a valve a;

The fifth water pipe is provided with a valve b.

The beneficial effects of the present invention are:

1) The air-conditioning system of the present invention adopts solar heat and power cogeneration to provide electric energy and hot water to the dew point evaporative cooling air-conditioning unit, which can maximize the utilization of solar energy resources, and gather sunlight through the concentrating plate to improve the utilization rate of solar energy.

2) The air-conditioning system of the present invention is equipped with a plate heat exchanger and a heat storage tank, which meets the daily hot water supply in each season, and can also store excess heat energy for heating in winter, so as to maximize utilization in each season Solar clean energy.

3) When the air conditioning system of the present invention is used in summer, the secondary air cooling of the dew point evaporative cooling air conditioner is used to cool down the water after heat energy extraction in cogeneration, that is, the microchannel heat exchanger is used as the water barrier of the secondary air , making full use of the return water of the secondary air cooling system, improving the efficiency of photovoltaic power generation.

4) When the air-conditioning system of the present invention is used in summer, the dew point evaporative cooling air conditioner is used for indoor cooling; when used in winter, the energy of solar hot water and heat storage tanks is used for floor radiation heating; The direct current generated by solar energy is clean and pollution-free, and can be used in both winter and summer.

Description of drawings

Fig. 1 is the structural representation of air-conditioning system of the present invention;

Fig. 2 is a side view of the solar cogeneration system in the air conditioning system of the present invention;

Fig. 3 is a schematic structural view of the solar cogeneration system in the air conditioning system of the present invention;

Fig. 4 is a schematic diagram of the circuit connection between the solar heat and power cogeneration system and the dew point evaporative cooling air conditioning unit in the air conditioning system of the present invention.

In the figure, 1. Concentrating plate, 2. Thin film solar cell, 3. Dew point evaporative cooling air conditioning unit, 4. Plate heat exchanger, 5. Heat storage tank, 6. Floor radiant tube, 7. Low resistance heat transfer tube, 8 .Check valve, 9. Valve a, 10. Valve b, 11. Micro-channel heat exchanger, 12. Shower nozzle, 13. Municipal water supply pipe, 14. Hot water pipe, 15. Hoses, 16. Pillar, 17 .Fixed bracket, 18. Nozzle, 19. Small hole, 20. Ceramic oval tube, 21. Filter, 22. Primary fan, 23. Secondary fan, 24. Water baffle, 25. Pool, 26. DC water pump a . Water supply pipe, 37. water inlet pipe, G1. first water pipe, G2. second water pipe, G3. third water pipe, G4. fourth water pipe, G5. fifth water pipe, G6. sixth water pipe, G7. seventh water pipe.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

The air conditioning system combining dew point evaporative cooling and solar heat and power cogeneration of the present invention has a structure as shown in Figure 1, including a solar heat and power cogeneration system, and the solar heat and power cogeneration system passes through the water pipe network and the dew point evaporative cooling air conditioning unit 3. Plate heat exchange Device 4, heat storage tank 5 and floor radiant tube 6 are connected.

The water pipe network structure between the solar cogeneration system, dew point evaporative cooling air conditioning unit 3, plate heat exchanger 4, heat storage tank 5 and floor radiant tube 6 is as follows:

The water outlet of the solar cogeneration system is connected to the plate heat exchanger 4 through the hot water pipe 14; the plate heat exchanger 4 is connected to the heat storage tank 5 through the first water pipe G1; the heat storage tank 5 is connected to the third water pipe G3, and the heat The water pipe 14 is connected to the third water pipe G3 through the second water pipe G2; the third water pipe G3 is connected to the microchannel heat exchanger 11 in the dew point evaporative cooling air conditioning unit 3 through the fourth water pipe G4, and the microchannel heat exchanger 11 passes through the sixth The water pipe G6 is connected to the water inlet pipe 37 of the solar cogeneration system; the third water pipe G3 is also connected to the water inlet of the floor radiant pipe 6 through the fifth water pipe G5, and the water outlet of the floor radiant pipe 6 is connected to the return water pipe 37 through the seventh water pipe G7 connect.

A shower nozzle 12 and a municipal water supply pipe 13 are externally connected to the plate heat exchanger 4 respectively.

The hot water pipe 14 is provided with a check valve 8; the third water pipe G3 is provided with a DC water pump b30, which provides power for the entire system and provides circulation power for the domestic hot water of the plate heat exchanger 4; the fourth The water pipe G4 is provided with a valve a9; the fifth water pipe G5 is provided with a valve b10.

The solar cogeneration system, as shown in Figure 1 and Figure 2, includes a solar cogeneration unit and a concentrating panel 1, the solar cogeneration unit is connected to the concentrating panel 1 through a fixed bracket 17, and the solar cogeneration unit is supported on a pillar 16 on.

The solar heat and power cogeneration unit has a structure as shown in Figure 3, including a plurality of metal round tubes 31 connected end to end in sequence, and the outer wall of each metal round tube 31 is wrapped with a thin-film solar cell 2, and the thin-film solar cell 2 passes through a wire 27 is sequentially connected with the power supply control unit and the power consumption equipment in the dew point evaporative cooling air-conditioning unit 3, as shown in Figure 4; each metal round tube 31 is provided with a circle of low-resistance heat transfer tubes 7 along the inner wall of the metal round tube 31; The low-resistance heat transfer tubes 7 in the plurality of metal round tubes 31 are connected by hoses 15 .

The power supply control unit is composed of a controller 28 and a high-energy storage battery 29 connected together through a power line, as shown in FIG. 4 .

The dew-point evaporative cooling air-conditioning unit 3 has a structure as shown in Figure 4. It includes an organic unit casing, an air inlet 32 is arranged on the side wall of the unit casing, and a dew-point evaporative cooling unit is arranged inside the unit casing. A water baffle 24 and a microchannel heat exchanger 11 are provided. The microchannel heat exchanger 11 is located on the air inlet side. The water baffle 24 and the microchannel heat exchanger 11 are arranged side by side and connected as one. There is a primary fan 22, and a secondary fan 23 is arranged above the microchannel heat exchanger 11; an air supply port 33 is arranged on the side wall of the unit housing corresponding to the primary fan 22, and the air supply port 33 is arranged opposite to the air inlet 32; the secondary fan 23 is provided with an air outlet 34 on the top wall of the casing of the unit.

A filter screen 21 is arranged in the air inlet 32 .

The dew point evaporative cooling unit, as shown in Figure 4, includes a tubular heat exchange core, which is composed of a plurality of ceramic elliptical tubes 20 arranged horizontally, and the surface of the tubular heat exchange core is controlled by primary air flow. A row of small holes 19 are arranged along the diagonal from bottom to top; a water distributor is arranged above the tubular heat exchange core, and the water distributor is composed of a water distribution pipe 35 and a plurality of water distribution pipes 35 that are evenly arranged on the water distribution pipe 35 facing the tubular heat exchanger. The heat core spray nozzle 18 is composed of; a pool 25 is arranged under the tubular heat exchange core, and the pool 25 is connected to the water distribution pipe 35 through a water supply pipe; the water supply pipe 36 in the pool 25 is provided with a DC water pump a26.

The primary air blower 22 , the secondary air blower 23 and the DC water pump a26 are all connected to the controller 28 through power lines.

The role of each component in the air-conditioning system combined with dew point evaporative cooling and solar heat and power cogeneration of the present invention:

(1) Solar cogeneration system: its core component is the solar cogeneration unit, the solar cogeneration unit is fixed on the concentrator panel 1 through the fixing bracket 17, and multiple solar cogeneration units are fixed on the ground or the ground through the pillar 16 is on other components;

Wherein the solar cogeneration unit is provided with a plurality of metal round tubes 31, and the outer wall of the metal round tube 31 is wrapped with a thin film solar cell 2, and the thin film solar cell 2 is used to absorb solar energy; A plurality of low-resistance heat transfer tubes 7 are laid, and the low-resistance heat transfer tubes 7 in the plurality of metal round tubes 31 are connected by flexible hoses 15, and the hot water generated in the low-resistance heat transfer tubes 7 flows into the hot water pipe 14 , delivered to other components through the hot water pipe 14.

(2) Power supply control unit: cooperate with the solar heat and power cogeneration system to assist in supplying power to the power consumption components in the dew point evaporative cooling air conditioning unit 3 (such as: DC water pump a26, primary fan 22 and secondary fan 23);

The power supply control unit is composed of a controller 28 and a high-energy battery 29 connected together through a power line; in order to save floor space, the controller 28 and the high-energy battery 29 can be laid on the top of the dew point evaporative cooling air conditioning unit 3;

The direct current generated by the thin-film solar cell 2 is connected to the controller 28 in the power supply control unit through the wire 27, and provides electric energy to the energy-consuming components in the dew point evaporative cooling air-conditioning unit 3; the excess electric energy is stored in the high-energy battery 29.

(3) Dew point evaporative cooling air conditioning unit 3: used to cool the outdoor air;

The outdoor air enters the unit casing through the air inlet 32, and the outdoor air is filtered by the filter 21 at the air inlet 32, and the filtered air flows through the dew point evaporative cooling unit, where the tubular heat exchange core in the dew point evaporative cooling unit , the air flows out from the small hole 19 on the ceramic oval tube 20 and enters the secondary flow path and the primary flow path to become secondary air and primary air respectively;

The microchannel heat exchanger 11 is used here as a water barrier for the secondary air.

(4) Plate heat exchanger 4: used to heat municipal water supply and directly provide domestic hot water for citizens.

(5) Heat storage tank 5: used to continuously store excess heat energy, so that the heat energy can be used directly when the heat energy is not sufficient.

(6) Floor radiant tube 6: installed under the floor of the room for heating the room in winter.

The working process of the air-conditioning system combined with dew point evaporative cooling and solar heat and power cogeneration of the present invention in winter and summer is as follows respectively:

(1) Open valve a9 and close valve b10 when using in summer:

Concentrate sunlight through the concentrating plate 1, and the thin-film solar cell 2 laid on the outer wall of the metal circular tube 31 receives the concentrated sunlight to generate direct current, which is introduced into the controller 28 in the power supply control unit through the wire 27, and the excess electric energy is stored in the high-energy battery 29 in standby;

At the same time, the solar heat and power cogeneration unit also receives the sunlight concentrated by the concentrating panel 1 to generate radiant heat, heats the water in the low-resistance heat transfer tube 7, and brings the generated heat energy to the plate heat exchanger 4 through the low-resistance heat transfer tube 7 , the municipal water supply in the municipal water supply pipe 13 is heated by the plate heat exchanger 4, so as to supply hot water for people's daily life;

The excess heat energy is stored in the heat storage tank 5 (absorbed and stored by the energy storage medium in the heat storage tank 5), then becomes water with a lower temperature, and then enters the microchannel heat exchange in the dew point evaporative cooling air conditioning unit 3 It is further cooled in the device 11, and finally returned to the low thermal resistance heat transfer tube 7 through the sixth water pipe G6 and the seventh water pipe G7 in order to carry out the next cycle and continue to take away the heat generated in the solar cogeneration system.

Wherein, the working process of the dew point evaporative cooling air conditioning unit 3 is as follows:

Through the operation of the primary fan 22 and the secondary fan 23, the external air enters through the air inlet 32 and is filtered by the filter screen 21 at the same time. In the secondary flow channel, the water droplets sprayed on the outer surface of the ceramic elliptical tube 20 and the nozzle 18 are evaporatively cooled and cooled to pre-cool the remaining air in the ceramic elliptical tube 20. Under the action, it is discharged from the air outlet 34; at the same time, the remaining air in the ceramic oval tube 20 flows out through the small hole 19 and enters the primary flow channel for isenthalpic cooling to further cool down, and then the excess water is filtered through the water baffle 24, and then Under the effect of the primary blower fan 22, it is sent into the cooling place through the air supply port 33.

(2) When using in winter, close the valve a9 and open the valve b10:

The hot water is generated by the solar heat and power cogeneration system, the hot water flows into the plate heat exchanger 4 along the hot water pipe 14, and the hot water treated by the plate heat exchanger 4 enters the heat storage tank 5 along the first water pipe G1 , the hot water flowing out of the thermal storage tank 5 continues to flow into the fifth water pipe G5 along the third water pipe G3, and finally provides higher temperature water for the floor radiant pipe 6 to achieve the purpose of heating.

When it is cloudy or at night, the solar cogeneration system cannot provide enough heat energy, and the heat energy stored in the thermal storage tank 5 is used for heating.

The air conditioning system combining dew point evaporative cooling and solar heat and power cogeneration of the present invention is provided with a core component solar heat and power cogeneration system and dew point evaporative cooling air conditioning unit 3, and is equipped with a plate heat exchanger 4, a heat storage tank 5 and a floor radiant tube 6. Among them, in the solar heat and power cogeneration system, the solar energy is collected by the concentrating plate 1, which improves the utilization rate of the solar energy, and at the same time, the solar radiation heat is taken away in time by setting the low-resistance heat transfer tube 7 inside the metal circular tube 31 . The dew point evaporative cooling air conditioning unit 3 is provided with a dew point evaporative cooling unit and a micro-channel heat exchanger 11, which not only can effectively reduce the air temperature, but also utilize the energy of the secondary air. The heat storage tank 5 is used to store heat energy, and the use of solar hot water is guaranteed throughout the year by setting the plate heat exchanger 4; the combination of the heat storage tank 5 and the floor radiant tube 6 ensures continuous and stable supply of heat energy.

The air-conditioning system combined with dew point evaporative cooling and solar heat and power cogeneration of the present invention utilizes clean energy solar energy, ensures solar thermal power generation through a special structural design, and at the same time combines with dew point evaporative cooling to prevent energy waste and solves the heating and cooling problems in winter and summer.

Claims (10)

1. The air-conditioning system combined with dew point evaporative cooling and solar heat and power cogeneration is characterized in that it includes a solar heat and power cogeneration system. Device (4), heat storage tank (5) and floor radiant tube (6) are connected. 2. The air conditioning system according to claim 1, characterized in that, the water outlet of the solar cogeneration system is connected with the plate heat exchanger (4) through a hot water pipe (14); the plate heat exchanger ( 4) Connect to the heat storage tank (5) through the first water pipe (G1); the heat storage tank (5) is connected to the third water pipe (G3), and the hot water pipe (14) is connected to the second water pipe (G2) Three water pipes (G3) connection; The third water pipe (G3) is connected to the microchannel heat exchanger (11) in the dew point evaporative cooling air conditioning unit (3) through the fourth water pipe (G4), and the microchannel heat exchanger (11) is connected through the sixth water pipe (G6) is connected with the water inlet pipe (37) of solar cogeneration system; The third water pipe (G3) is also connected to the water inlet of the floor radiant pipe (6) through the fifth water pipe (G5), and the water outlet of the floor radiant pipe (6) is connected to the return water pipe ( 37) Connect. 3. The air conditioning system according to claim 1 or 2, characterized in that a shower head (12) and a municipal water supply pipe (13) are externally connected to the plate heat exchanger (4). 4. The air conditioning system according to claim 1 or 2, characterized in that, the solar cogeneration system comprises a solar cogeneration unit and a concentrating panel (1); The solar cogeneration unit is connected to the concentrator panel (1) through a fixed bracket (17), and the solar cogeneration unit is supported on a pillar (16). 5. The air conditioning system according to claim 4, characterized in that, the solar cogeneration unit includes a plurality of metal round tubes (31) connected end to end in sequence, and the outer wall of each metal round tube (31) Both are wrapped with thin-film solar cells (2), and the thin-film solar cells (2) are sequentially connected to the power supply control unit and the dew point evaporative cooling air-conditioning unit (3) through wires (27); A circle of low-resistance heat transfer tubes (7) is arranged in the tube of each metal round tube (31) along the inner wall of the metal round tube (31); Connection via hose (15). 6. The air conditioning system according to claim 5, characterized in that, the power supply control unit is composed of a controller (28) and a high-energy storage battery (29) connected together through a power line; The dew point evaporative cooling air conditioner unit (3) includes an organic unit casing, and an air inlet (32) is arranged on the side wall of the unit casing; a dew point evaporative cooling unit is arranged inside the unit casing, and the dew point evaporation The top of the cooling unit is respectively provided with a water baffle (24) and a microchannel heat exchanger (11), and the water baffle (24) and the microchannel heat exchanger (11) are arranged side by side and connected as one; The top of the water plate (24) is provided with a primary fan (22), and the top of the microchannel heat exchanger (11) is provided with a secondary fan (23); An air outlet (33) is provided on the side wall of the unit housing corresponding to the primary fan (22), and an air exhaust port (34) is provided on the top wall of the unit housing corresponding to the secondary fan (23); Both the primary fan (22) and the secondary fan (23) are connected to the controller (28) through a power line. 7. The air conditioning system according to claim 6, characterized in that, the air supply port (33) is arranged opposite to the air inlet port (32). 8. The air conditioning system according to claim 6 or 7, characterized in that a filter (21) is arranged inside the air inlet (32). 9. The air conditioning system according to claim 6, wherein the dew point evaporative cooling unit comprises a tubular heat exchange core, and the tubular heat exchange core consists of a plurality of horizontally arranged ceramic elliptical tubes ( 20) composition, the surface of the tubular heat exchange core is provided with a row of small holes (19) along the diagonal line from bottom to top according to the primary air flow direction; A water distributor is arranged above the tubular heat exchange core, and the water distributor consists of a water distribution pipe (35) and a plurality of nozzles ( 18) Composition; A water pool (25) is provided below the tubular heat exchange core, and the water pool (25) is connected to the water distribution pipe (35) through a water supply pipe; the water supply pipe (36) located in the water pool (25) is provided with a direct current The water pump a (26); the DC water pump a (26) is connected with the controller (28) through a power line. 10. The air conditioning system according to claim 2, characterized in that a check valve (8) is arranged on the hot water pipe (14); The third water pipe (G3) is provided with a DC water pump b (30); The fourth water pipe (G4) is provided with a valve a (9); The fifth water pipe (G5) is provided with a valve b (10).