CN202216595U - A liquid pump driven heat pipe cooling device for natural cooling - Google Patents

Abstract

A liquid pump driven heat pipe cooling device for natural cooling is composed of an air-cooled heat exchanger, a liquid reservoir, a liquid pump, an evaporator and a connecting pipe. The air-cooled heat exchanger, the liquid pump and the evaporator installed outdoors are connected into a loop through the connecting pipe. A closed space is formed inside and filled with a low-boiling-point working fluid. The liquid reservoir is connected between the air-cooled heat exchanger and the liquid pump. The liquid pump sends the liquid working fluid into the evaporator. After absorbing the heat emitted by the heating element in contact with the evaporator, part of the liquid working fluid vaporizes to form a gas-liquid mixture, which flows into the air-cooled heat exchanger and dissipates the heat to the atmosphere flowing through the outer surface of the air-cooled heat exchanger. After the working fluid is cooled and liquefied, it flows back to the liquid pump through the liquid reservoir. In this way, the heat of the heating element can be dissipated into the atmosphere through continuous circulation. The device is easy to control, has low cost, can effectively improve the power of the working fluid circulation, reduce the circulation amount of the working fluid, reduce the power consumption of the liquid pump, and has good heat dissipation performance within a large heat dissipation range.

Description

A liquid pump driven heat pipe cooling device for natural cooling

technical field

The invention relates to a heat dissipation device used in wind power generators and other occasions requiring cooling and cooling, and belongs to the technical field of heat exchange of heat exchange equipment.

Background technique

In today's world, energy shortages and environmental problems are becoming more and more prominent. As a renewable energy source, wind energy is favored by people. Therefore, my country's wind power industry has developed extremely rapidly and its installed capacity has continued to expand. With the continuous expansion of stand-alone capacity, the problem of heat dissipation and cooling of generators has become increasingly prominent. The traditional cooling method of wind turbines is to use pumps to circulate cooling water to absorb the heat generated during the power generation process, and the heated cooling water is sent to the air-cooled heat exchanger outside the generator cabin to dissipate heat and be reused. In order to meet the requirements of wide meteorological conditions in different regions, especially for antifreeze in winter, a certain amount of antifreeze must be added to the cooling water, such as ethylene glycol, etc., which can effectively reduce the freezing point of the cooling liquid, but in this way, the freezing point of the cooling liquid The specific heat capacity is obviously smaller than that of water, so the flow rate of the pump must be increased. In this way, on the one hand, the power consumption of the pump is increased, and on the other hand, the cooling effect is also greatly affected.

The above-mentioned natural cooling system of cooling liquid circulation is also adopted in large data computer rooms and the like. As we all know, the communication and electrical equipment in the computer room run continuously for a long time and generate a lot of heat. Special cooling equipment is needed to dissipate the heat generated by the equipment or components to the atmosphere to maintain the ambient temperature in the computer room and ensure the normal operation of the equipment. . At present, it is more common practice to use air-conditioning equipment to remove the heat from the working environment inside the computer room, so as to achieve the purpose of cooling the computer room. Although this heat dissipation and cooling method can meet the requirements of cooling and temperature control, the operation energy consumption of the air conditioning equipment is relatively large, resulting in high operating costs of the system. For this reason, the natural cooling system with cooling liquid circulation is adopted. In the cool spring, autumn and winter, the natural cold source of the atmosphere is used to cool the data room, which can bring significant energy saving effects. However, the above-mentioned problems in the cooling of wind turbines in the natural cooling system of cooling liquid circulation still exist in the cooling of data centers.

In order to solve the problems existing in the above-mentioned natural cooling system of cooling liquid circulation in the cooling of wind turbines and data centers, the technical solution of the present invention is designed.

Contents of the invention

The invention provides a liquid pump-driven heat pipe cooling device for natural cooling of a wind power generating set or a data room, which uses a low-boiling point medium that is gaseous at normal temperature and pressure and has a freezing point far lower than the meteorological temperature as a working medium, and is compatible with the working medium. The liquid pump is designed to reduce the energy consumption of wind turbines or data room cooling, improve the reliability of its internal equipment, prolong the service life of equipment, and also fundamentally solve the problem of large liquid working medium circulation in the natural cooling system of cooling liquid, Technical problems such as unsatisfactory heat dissipation effect make it have good heat dissipation performance in a wide range of heat generation, large heat flow and many on-site conditions, and achieve the ideal effect of natural cooling.

The device includes an air-cooled heat exchanger 1, a liquid reservoir 2, a liquid pump 3, an evaporator 4 and a connecting pipe 5, and through the connecting pipe 5, the air-cooled heat exchanger 1, liquid pump 3 and evaporator installed outdoors 4 are connected into a circuit, and a closed space is formed inside and filled with a certain amount of low-boiling point working fluid 6, and a liquid reservoir 2 is connected between the air-cooled heat exchanger 1 and the liquid pump 3. A liquid pump 3 is installed between the air-cooled heat exchanger 1 and the evaporator 4. The inlet of the liquid pump 3 is connected with a liquid reservoir 2. The liquid pump 3 sends the liquid working medium into the evaporator 4 to absorb the After the heat emitted by the heating element 7, part of the working medium vaporizes to form a gas-liquid mixture, which flows into the air-cooled heat exchanger 1, and dissipates the heat to the atmosphere flowing through the outer surface of the air-cooled heat exchanger 1. After the working medium is cooled and liquefied, it is stored Liquid container 2, flow back to liquid pump 3 again. In this continuous circulation, the heat of the heating element can be dissipated into the atmosphere.

The heat pipe cooling device driven by a liquid pump for natural cooling is described. The liquid pump is a jet pump or a mechanical liquid pump, and the driving machine of the mechanical liquid pump adopts a shielded motor.

The liquid pump driving heat pipe cooling device for natural cooling, the mechanical liquid pump is one of rotary vane type, diaphragm type, electromagnetic type, scroll type, rotor type or piston type, or centrifugal Type, axial flow or mixed flow type.

The heat pipe cooling device is driven by a liquid pump for natural cooling, and the working fluid filled in the heat pipe cooling device is a low-boiling point medium, which can be one or more mixtures of alkanes, alkenes and their halogenated compounds ; or ammonia, methanol, ethanol, or acetone.

The liquid pump driven heat pipe cooling device for natural cooling, the evaporator is a coil, directly embedded on the surface of the heating element or embedded in the inside of the heating element; or it is a box-shaped container, directly pressed on the The surface of the heating element; or an air-cooled fin heat exchanger, the hot air flows directly through the heat exchanger; coils or box-shaped containers, or fin heat exchangers can be one group, or multiple groups in series or connected in parallel.

The liquid pump driven heat pipe cooling device for natural cooling is characterized in that: the air-cooled heat exchanger is an air-cooled fin heat exchanger, and the heat exchanger can be equipped with or without a fan ; It can be one group or multiple groups connected in series or in parallel.

In the liquid pump driven heat pipe cooling device for natural cooling, the installation position of the liquid reservoir should be higher than the inlet of the liquid pump, and the liquid level in the liquid reservoir should be at least 20cm higher than the centerline of the inlet of the liquid pump; It can be connected in series to the circuit, or it can be connected with the circuit by a branch pipe.

For the above-mentioned natural cooling, the liquid pump drives the heat pipe cooling device, the liquid pump 3 sucks the liquid working medium from the liquid reservoir 2, and sends the liquid working medium into the evaporator 4 to absorb the heat generated by the heating element 7 in contact with the evaporator 4. After heating, part of the working medium is vaporized to form a gas-liquid mixture, which flows into the air-cooled heat exchanger 1, and dissipates heat to the atmosphere flowing through the outer surface of the air-cooled heat exchanger 1. Flow back to liquid pump 3. In this continuous circulation, the heat of the heating element can be dissipated into the atmosphere.

The present invention can obtain following beneficial effect:

After adopting this device, the low-boiling-point liquid working medium circulated by the liquid pump flows through the evaporator, and the boiling point of the working medium is lower than the wall temperature of the evaporator. When flowing through the evaporator, the working medium undergoes boiling heat exchange, and the gas-liquid mixture flows out of the evaporator , The latent heat of vaporization is significantly greater than the heat absorbed when the liquid is heated up, which can significantly improve the cooling effect on the heating element, and at the same time, the amount of liquid working fluid circulating in the pump is also effectively reduced, reducing the power consumption of the pump. Therefore, it has good heat dissipation performance in a large heat flow range and a wide field environment. The device has simple structure, is easy to manufacture, and has low cost. There is no relative position requirement between parts during installation, and the installation and use are convenient.

Description of drawings

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

Fig. 1 is a schematic diagram of embodiment 1: a liquid pump-driven heat pipe cooling device for cooling a single-coil evaporator wind turbine;

Fig. 2 is Embodiment 2: a structural schematic diagram of a liquid pump-driven heat pipe cooling device for cooling multi-coil evaporator wind turbines;

Fig. 3 is a schematic diagram of embodiment three: a box-shaped evaporator liquid pump driving a heat pipe cooling device;

Fig. 4 is a schematic diagram of embodiment four: a liquid pump-driven heat pipe cooling device for cooling a data center with a single air-cooled evaporator;

Fig. 5 is a schematic diagram of embodiment five: a liquid pump-driven heat pipe cooling device for cooling a data center with multiple air-cooled evaporators;

In the figure: 1-air-cooled heat exchanger, 2-reservoir, 3-liquid pump, 4-evaporator, 5-connecting pipe, 6-low boiling point working fluid, 7-heating body, 8-air-cooled exchange Heater fan, 9-evaporator fan.

Detailed ways

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

Embodiment one:

The structure of the heat pipe cooling device driven by a liquid pump for the cooling of a single-coil evaporator wind turbine is shown in Figure 1. The device includes an air-cooled heat exchanger 1 , a liquid reservoir 2 , a liquid pump 3 , an evaporator 4 and connecting pipes 5 . The heating element 7 is the stator of the wind power generator, and the evaporator 4 is a copper coil, which is spirally inlaid on the surface of the stator, and the working medium flows through the copper coil; the air-cooled heat exchanger 1 is a copper tube series aluminum fin heat exchanger , the working medium flows in the copper tube, and the wind flows through the aluminum fins outside the copper tube; the liquid pump 3 is a shielded centrifugal freon pump, and the low boiling point working medium fluid 6 is freon or its mixture. The air-cooled heat exchanger 1, the liquid pump 3 and the evaporator 4 are connected into a circuit through the connecting pipe 5, and a certain amount of freon working fluid is filled in the internal closed space, and a storage liquid is installed at the outlet of the air-cooled heat exchanger 1 In the device 2, the liquid level in it is at least 20cm higher than the centerline of the inlet of the liquid pump 3. The liquid pump 3 sucks the liquid working medium from the liquid reservoir 2, and sends it into the evaporator 4 forcibly, cooling the stator of the generator. In the cold heat exchanger 1, the air flows through the outer surface of the heat exchanger 1, and the working medium dissipates heat to the atmosphere in the air-cooled heat exchanger 1, and the working medium flows into the liquid storage 2 after cooling down and liquefied, and works in the liquid storage 2 The gas-liquid stratification of the substance, the liquid deposited in the lower part flows back to the liquid pump 3 again. In this way, the working medium is continuously circulated in the cooling device driven by the liquid pump, and the heat of the stator of the wind power generator can be dissipated into the atmosphere. Compared with the aforementioned coolant system, the cooling effect is significantly improved, the power consumption of the pump is also significantly reduced, and the original safety problems caused by leakage have also been resolved.

Embodiment two:

The structure of the heat pipe cooling device driven by the liquid pump for cooling the multi-coil evaporator wind turbine is shown in Figure 2. For large wind turbines, the calorific value and the size of the stator are relatively large. In order to avoid the problem of large diameter and long pipeline of a single copper coil, two-section, three-section or multi-section copper coils are inlaid in segments, and each of them is inserted, The outlets are respectively connected in parallel to form a multi-channel parallel evaporator. The composition and working process of all the other parts are as in embodiment one.

Embodiment three:

The structure of the heat pipe cooling device driven by the liquid pump of the box-shaped evaporator is shown in Figure 3. For the heating element in planar shape, the evaporator is made into a flat box shape, so that the evaporator can be in close contact with the heating element, and the inside of the box-shaped evaporator is filled with working fluid. The composition and working process of all the other parts are as in embodiment one.

Embodiment four:

The structure of the heat pipe cooling device driven by the liquid pump for cooling the data room with single air-cooled evaporator is shown in Figure 4. The device includes an air-cooled heat exchanger 1, a liquid reservoir 2, a liquid pump 3, an evaporator 4 and a connecting pipe 5, which can dissipate the heat of the hot air in the data room to the cold outdoor air. The evaporator 4 is installed indoors and is a finned air-cooled heat exchanger. The evaporator fan 9 forces the indoor hot air to circulate through the evaporator 4, and transfers heat to the working medium 6 flowing through the evaporator 4; The heat exchanger 1 is installed outdoors, and the fan 8 of the heat exchanger forcibly drives outdoor cold air to circulate and flow through the outer surface of the air-cooled heat exchanger 1 to cool the working fluid 6 inside. The liquid pump 3 sucks the liquid working medium from the liquid reservoir 2 and sends it into the evaporator 4 to cool the hot air in the machine room. Cold heat exchanger 1, the outdoor cold air flows through the outer surface of heat exchanger 1, the working medium dissipates heat in air-cooled heat exchanger 1 to the atmosphere, cools down and liquefies, then flows into liquid storage 2, and works in liquid storage 2 The gas-liquid stratification of the substance, the liquid deposited in the lower part flows back to the liquid pump 3 again. In this way, the working medium is continuously circulated in the cooling device driven by the liquid pump, and the heat in the data room can be dissipated to the atmosphere.

Embodiment five:

The structure of the heat pipe cooling device driven by the liquid pump for cooling the data room with multiple air-cooled evaporators is shown in Figure 5. For large-scale data centers, for uniform cooling or directional cooling, the evaporator is composed of two, three or more finned air-cooled heat exchangers connected in parallel, and the liquid is supplied by the liquid pump 3 and distributed by the pipeline 5. Collect the working fluid. The composition and working process of the remaining parts are as follows:

Embodiment four.

The above is only a preferred and feasible embodiment of the present invention, and cannot therefore limit the scope of rights of the present invention. For those of ordinary skill in the art, it is possible to use the technical solutions and technical ideas of the present invention to make other various All corresponding changes and deformations should fall within the protection scope of the claims of the present invention.

Claims (6)

1. a liquid pump that cools off usefulness naturally drives heat pipe cooling device; This device comprises air cooling heat exchanger (1), reservoir (2), liquid pump (3); Evaporimeter (4) be connected pipeline (5); It is characterized in that: will be installed in outdoor air cooling heat exchanger (1), liquid pump (3) and evaporimeter (4) and be in turn connected to form the loop, inner confined space and the filled low boiling working fluid fluid (6) of forming is associated with reservoir (2) between air cooling heat exchanger (1) and liquid pump (3); Said evaporimeter (4) is contact heating body (7) closely.

2. the liquid pump of a kind of usefulness of cooling naturally according to claim 1 drives heat pipe cooling device, and it is characterized in that: said liquid pump is jet pump or mechanical type liquid pump, and the driving machine of mechanical type liquid pump adopts the protected type motor.

3. the liquid pump of a kind of usefulness of cooling naturally according to claim 2 drives heat pipe cooling device; It is characterized in that: said mechanical type liquid pump is to be rotary vane type, diaphragm type, electromagnetic type, vortex, rotator type or in the form of piston a kind of, or centrifugal, axial-flow type or mixed-flow is a kind of.

4. the liquid pump of a kind of usefulness of cooling naturally according to claim 1 drives heat pipe cooling device, and it is characterized in that: described evaporimeter (4) is a coil pipe, directly is embedded in heater (7) surface or is embedded in heater (7) inside; Perhaps be the container of casing shape, directly be pressed in the heater surface; Perhaps be air-cooled finned heat exchanger, hot-air directly flows through heat exchanger; Coil pipe or casing shape container or finned heat exchanger are one group, or organize serial or parallel connection together more.

5. the liquid pump of a kind of usefulness of cooling naturally according to claim 1 drives heat pipe cooling device, and it is characterized in that: described air cooling heat exchanger (1) is air-cooled finned heat exchanger; Air-cooled finned heat exchanger band blower fan, or be not with blower fan; Air-cooled finned heat exchanger is one group, or organizes serial or parallel connection together more.

6. the liquid pump of a kind of usefulness of cooling naturally according to claim 1 drives heat pipe cooling device, and it is characterized in that: said reservoir (2) installation site is higher than the import of liquid pump (3), and the interior liquid level of reservoir (2) is higher than liquid pump (3) import center line 20cm at least; Reservoir (2) is connected in series in the loop, or links with arm and loop.

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