CN211977127U

CN211977127U - Data computer room heat pipe air-conditioning system based on convection heat transfer and sky radiation

Info

Publication number: CN211977127U
Application number: CN202020591876.9U
Authority: CN
Inventors: 张伟明; 周聪; 岳畏畏; 袁瑗
Original assignee: Ccig Xinyuan Tianjin Technology Co ltd
Current assignee: Ccig Xinyuan Tianjin Technology Co ltd
Priority date: 2020-04-20
Filing date: 2020-04-20
Publication date: 2020-11-20
Anticipated expiration: 2030-04-20

Abstract

The utility model provides a data computer lab heat pipe air conditioning system based on convection heat transfer and sky radiation, including rack and evaporimeter, each evaporimeter upwards passes through the pipeline and is connected with the gas collector respectively, the upper end of gas collector is connected with the condenser through first motorised valve and pipeline, the gas collector still links to each other with radiation refrigeration module group through second motorised valve and pipeline, the top of condenser is equipped with the condenser fan, radiation refrigeration module group is connected with the reservoir, the exit of evaporimeter, condenser and radiation refrigeration module all is equipped with temperature sensor, and each temperature sensor links to each other with PLC control module respectively. The utility model has the advantages that: after the radiation refrigeration module is added, the working condition range of the system is widened, and the refrigeration capacity is strong; different working conditions of the equipment can be controlled and monitored through the PLC control system, and the system can be overhauled when abnormal occurs.

Description

Data computer room heat pipe air-conditioning system based on convection heat transfer and sky radiation

Technical Field

The utility model belongs to the technical field of energy-conservation, especially, relate to a be applied to radiating data computer lab heat pipe air conditioning system based on convection heat transfer and sky radiation of communication computer lab and information center computer lab.

Background

In recent years, the communication and digital industries of China are rapidly developed, and the number of data rooms and energy consumption are rapidly increased. The data computer room is a large energy consumer, and there is a PUE concept in the energy consumption evaluation index, that is, PUE is total energy consumption/IT equipment energy consumption of the data center, and the excess energy consumption is consumed in the heat dissipation of the IT equipment by removing the IT equipment energy consumption.

In order to save heat dissipation energy consumption, the heat pipe technology is applied to the heat dissipation aspect of a machine room in the industry, and the heat pipe is used as a hot superconductor, so that the heat dissipation efficiency is very ideal; however, the heat pipe air conditioner has poor heat dissipation capability when the external temperature is higher, and may fail to operate when the outdoor temperature is lower than the indoor temperature by less than 5 ℃, and mechanical refrigeration is required to be started.

The surface thermal radiation wavelength of a normal-temperature object is usually concentrated in 8-13 mu m, and the atmospheric transmittance of the electromagnetic wave in the wave band is high; the space temperature is close to absolute zero and is a natural radiation cold source; the wavelength of the solar rays is concentrated at 0.4-4 μm in the daytime. A selective coating is coated on the surface of the radiator, the spectral emissivity of the coating at the wavelength of 8-13 mu m is high, and the absorptivity of the coating to electromagnetic waves of other wave bands is low. The object surface may radiate heat as much as possible skyward with little absorption of sunlight. The cooling is realized in the process of continuously radiating heat to the sky, namely the sky radiation refrigeration principle.

In the chinese patent with the publication number "CN 208779764U", a heat pipe air conditioning system with a liquid storage tank is disclosed. The system evaporator is arranged at a heat outlet on the outer side of a rear door plate of a server cabinet, the evaporator is added with a fan to guide hot air, the evaporated refrigerant working medium in the state is radiated in an outdoor condenser, flows into a liquid storage tank under the action of gravity after being condensed, and then flows back to the evaporator for refrigeration and is circulated and reciprocated. This solution has the following drawbacks: 1. when the outdoor temperature is higher than the indoor temperature and the outdoor temperature is lower than the indoor temperature, but the temperature difference is small, the heat pipe cannot work continuously; 2. the working medium is cooled and condensed by air, the supercooling degree of the working medium is small, and the refrigerating capacity of the refrigerant per unit mass is relatively small; 3. the device can not reflect the day illumination in the daytime and can not reduce the refrigeration load of the building caused by illumination.

Disclosure of Invention

To the above-mentioned prior art, the to-be-solved technical problem of the utility model is to provide a can widen traditional heat pipe air conditioner's operating mode scope to reduce the data computer lab heat pipe air conditioning system of the refrigeration load of roof building.

In order to solve the technical problem, the utility model provides a data computer lab heat pipe air conditioning system based on convection heat transfer and sky radiation, including evaporimeter, gas collector, condenser and the radiation refrigeration module group that sets up in each rack air outlet department in the computer lab, each evaporimeter upwards is connected with the gas collector through the pipeline, the upper end of gas collector is connected with the condenser through first motorised valve and pipeline, the gas collector still links to each other with the radiation refrigeration module group through second motorised valve and pipeline; a condenser fan is arranged above the condenser, and the radiation refrigerating module group is connected with the liquid storage device; the evaporator, the gas collector, the condenser, the radiation refrigeration module group, the liquid storage device, the first electric valve and the second electric valve are connected into a closed circulating system through pipelines; the utility model discloses a heat pump air-cooled refrigeration system, including evaporimeter, air-cooled condenser, radiation refrigeration module, PLC control module, air-cooled condenser, evaporator exit, air-cooled condenser's exit, radiation refrigeration module exit is equipped with third temperature sensor, and above-mentioned temperature sensor is connected with PLC control module respectively, PLC control module still is connected with indoor fourth temperature sensor, the outdoor fifth temperature sensor of setting inside and outside the computer lab respectively.

The radiation refrigeration module group includes heat preservation frame, refrigeration working medium pipe, complete transparent cover and radiation plate, the top surface of heat preservation frame is equipped with the opening, and it has complete transparent cover to inlay in the opening, refrigeration working medium pipe stretches into, is S type equipartition and stretches out in the heat preservation frame and from the opposite side from one side of heat preservation frame, be equipped with the radiation plate between the bottom surface of refrigeration working medium pipe and heat preservation frame, refrigeration working medium pipe and radiation plate braze welding and be connected and form the surface contact.

The upper surface of the radiation plate is plated with a spectrum selective film.

The height of the liquid storage device is higher than the highest point of each evaporator and lower than the height of the gas collector.

The radiation refrigeration module group is installed in an inclined mode, and one end, connected with the condenser, of the radiation refrigeration module group is higher than one end, connected with the liquid storage device, of the radiation refrigeration module group.

And the output end of the PLC control module is connected with the display.

The invention has the following beneficial effects:

(1) radiation refrigeration is adopted, when the outdoor environment temperature is higher than that of the indoor environment, the surface temperature of the radiation module is still lower than that of the indoor environment, and the refrigeration working medium in the heat pipe flows into the radiation module to obtain cold condensation; compared with the traditional air-cooled heat pipe, the working condition range is widened, and the equipment can still work under the condition that the equipment cannot work originally;

(2) when the outdoor environment temperature is lower, the air cooling heat dissipation capacity can realize the condition that the working medium is condensed, the working medium flows into the radiation refrigeration module, so that a larger super-cooling degree can be obtained, and the refrigeration capacity is stronger.

(3) The absorption rate of the surface of the radiation refrigeration module to sunlight is extremely low, when the sunlight irradiates, most electromagnetic waves of a wave band where the solar radiation is positioned are reflected, and when the radiation refrigeration module is arranged on a roof, the energy which is originally irradiated on the roof and absorbed by the surface of the roof is avoided; for the building, the heat of the building is reduced, and the air conditioning cooling load in the machine room is relatively reduced.

(4) The PLC control system is adopted to monitor the temperature of the outlets of all the parts, the heat dissipation conditions of the condenser and the radiation refrigeration module group and the supercooling condition of the working medium in the radiation refrigeration module can be calculated by comparison, and the system can be overhauled if abnormity occurs.

Drawings

Fig. 1 is a schematic structural diagram of a data room heat pipe air conditioning system of the present invention;

FIG. 2 is a schematic structural diagram of a radiation cooling module set;

fig. 3 is a sectional view taken along line a-a of fig. 2.

1-a cabinet; 2-an evaporator; 3-a gas collector; 4-a condenser; 5-a radiation refrigeration module group; 6-a liquid reservoir; 7-a PLC control module; 8-a first temperature sensor; 9-a second temperature sensor; 10-a third temperature sensor; 11-a fourth temperature sensor; 12-a fifth temperature sensor; 13-a first electrically operated valve; 14-a second electrically operated valve; 15-a display; 16-a condenser fan; 17-a refrigerant working medium pipe; 18-a heat preservation frame; 19-a fully transparent cover plate; 20-radiation plate.

Detailed Description

Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

As shown in fig. 1-3, the utility model provides a data computer lab heat pipe air conditioning system based on convection heat transfer and sky radiation, including evaporimeter 2, gas collector 3, condenser 4, radiation refrigeration module group 5 and the reservoir 6 that sets up in each rack 1 air outlet department in the computer lab, each evaporimeter 2 upwards is connected with gas collector 3 through the pipeline, the upper end of gas collector 3 is connected with condenser 4 through first motorised valve 13 and pipeline, gas collector 3 still links to each other with radiation refrigeration module group 5 through second motorised valve 14 and pipeline, radiation refrigeration module group 5 is connected with reservoir 6, evaporimeter 2, gas collector 3, condenser 4, radiation refrigeration module group 5, reservoir 6, first motorised valve 13, second motorised valve 14 pass through the pipe connection and are a confined circulation system; each evaporator 2 is connected with the gas collector 3 and used for collecting each branch steam, and in the installation direction, the evaporators 2 are vertically installed, and the refrigerant flows from bottom to top; the height of the gas collector 3 is higher than the highest point of each evaporator 2 to ensure that the steam rises normally and condenses; the height of the liquid storage device 6 is higher than the highest point of each evaporator 2 so as to ensure that the liquid refrigerant can flow into each branch evaporator under the action of gravity; the height of the liquid storage device 6 is lower than that of the gas collector 3, so that the refrigerant is prevented from evaporating to generate bubbles and enters the gas collector 3; the air-cooled condenser 4 is arranged at the highest position, and a refrigerant in a discharge pipe of the condenser 4 is baffled from top to bottom, so that the liquid of the refrigerant can flow under the action of gravity, and backflow is avoided; the air-cooled condenser 4 is arranged on the roof, and the height of the refrigerant outlet is higher than that of the radiation refrigeration module group 5; the radiation refrigeration module group 5 is obliquely installed, so that the refrigerant liquid is guaranteed to be baffled from top to bottom in the radiation refrigeration module group 5, and the liquid is prevented from being accumulated in the radiation refrigeration module group 5 under the action of gravity; the surface gradient of the radiation refrigerating module group 5 is not too large, so that the heat radiation interference of surrounding buildings is avoided; the height of the liquid storage device 6 is lower than the lowest point of the radiation refrigerating module group 5, the space arrangement can fully utilize the gravity action, and the natural circulation of the refrigerant can be ensured without auxiliary power.

The radiation refrigeration module group comprises a refrigeration working medium pipe 17, a heat preservation frame 18, a fully transparent cover plate 19 and a radiation plate 20, wherein an opening is formed in the top surface of the heat preservation frame 18, the fully transparent cover plate 19 is embedded in the opening, the refrigeration working medium pipe 17 extends into the heat preservation frame 18 from one side of the heat preservation frame 18, is uniformly distributed in the heat preservation frame 18 in an S shape and extends out from the other side of the heat preservation frame 18, the radiation plate 20 is arranged between the refrigeration working medium pipe 17 and the bottom surface of the heat preservation frame 18, the refrigeration working medium pipe 17 and the radiation plate 20 are in brazing connection to form surface contact, the radiation plate 20 is attached to the outer wall of the refrigeration working medium pipe 17, the contact area is larger, and the; the full transparent cover plate 19 has good transmittance to all-band radiation and plays a role in protecting the surface of the radiation plate 20; the upper surface of the radiation plate 20 is plated with a spectrum selective film, so that the radiation emissivity of the radiation plate to a wave band of 8-13 mu m is high, and the radiation reflection capacity of the radiation plate to a wave band of 8-13 mu m is strong; the surface radiation spectrum wavelength of the normal-temperature object is concentrated in the range of 8-13 mu m, the sky radiation spectrum wavelength is concentrated beyond 8-13 mu m, and the difference between the receiving energy and the emitting energy causes the temperature of the radiation plate 20 to be reduced; the radiant panel 20 is contacted with the refrigeration working medium pipe 17, and continuously absorbs heat from the inside of the pipe, so that the working medium in the pipe is condensed; the heat preservation frame 18 can prevent the cold energy obtained by radiation from leaking outwards.

Example (b):

the cabinet 1 is an indoor heat source, hot air at an air outlet of the cabinet 1 is guided by a fan of the rear evaporator and exchanges heat with the surface of the evaporator 2 in a convection manner, the air temperature is reduced, working media in the evaporator 2 are evaporated, the condensation pressure of steam at a condensation side is reduced, the steam at the evaporator 2 side rises under the push of pressure difference, and is collected in the gas collector 3 and then rises to the condensation side; the condensing side flow passage is different according to the change of working conditions, and the change of the flow passage is determined by the opening and closing states of the first electric valve 13 and the second electric valve 14; the refrigerant liquid of condensation side condensation flows into reservoir 6 by the action of gravity, and the liquid flows into evaporimeter 2 again by the action of gravity in the reservoir 6, and the circulation is reciprocal, and simultaneously, radiation refrigeration module group 5 is laid on the roof, and the module surface is great to the sunshine reflectivity, has reduced the solar radiation heat on roof, has passively reduced the refrigeration load of building.

The utility model discloses an operating condition:

the system comprises a set of electric valve control system and a monitoring device. Surrounding the PLC control module 7, taking a first temperature sensor, a second temperature sensor, a third temperature sensor, a fourth temperature sensor and a fifth temperature sensor as signal input ends, respectively obtaining an evaporator outlet steam temperature T1, an air-cooled condenser outlet temperature T2, a radiation refrigeration module outlet liquid temperature T3, an indoor side temperature T4 and an outdoor side environment temperature T5, taking a first electric valve 13, a second electric valve 14 and a condenser fan 16 as execution parts to control a flow channel, and monitoring basic logic is as follows:

when T4> T5, the first electric valve 13 is opened and the second electric valve 14 is closed, and the refrigerant radiates heat in the condenser 4 and then enters the radiation refrigeration module group 5 to radiate heat.

And when the T4 is not more than T5, the first electric valve 13 is closed, the second electric valve 14 is opened, the condenser fan 16 stops running, and the refrigerant only flows through the radiation refrigeration module to radiate and dissipate heat.

The control system can monitor the temperature from T1 to T5, display the temperature on the display 15, and compare and calculate the heat dissipation condition of the air-cooled condenser 4 and the radiation refrigeration module group 5 and the supercooling condition of the working medium in the radiation refrigeration module, and if abnormity occurs, the system can be overhauled.

While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.

Claims

1. The data machine room heat pipe air-conditioning system based on convection heat transfer and sky radiation is characterized by comprising evaporators (2), a gas collector (3), a condenser (4) and a radiation refrigeration module group (5) which are arranged at air outlets of all machine cabinets (1) in a machine room, wherein each evaporator (2) is upwards connected with the gas collector (3) through a pipeline, the upper end of the gas collector (3) is connected with the condenser (4) through a first electric valve (13) and a pipeline, and the gas collector (3) is also connected with the radiation refrigeration module group (5) through a second electric valve (14) and a pipeline; a condenser fan (16) is arranged above the condenser (4), and the radiation refrigerating module group (5) is connected with the liquid storage device (6); the evaporator (2), the gas collector (3), the condenser (4), the radiation refrigeration module group (5), the liquid storage device (6), the first electric valve (13) and the second electric valve (14) are connected into a closed circulating system through pipelines; evaporator (2) exit is equipped with first temperature sensor (8), the exit of air-cooled condenser (4) is equipped with second temperature sensor (9), radiation refrigeration module exit is equipped with third temperature sensor (10), and above-mentioned temperature sensor is connected with PLC control module (7) respectively, PLC control module (7) still are connected with indoor fourth temperature sensor (11), outdoor fifth temperature sensor (12) of setting inside and outside the computer lab respectively.

2. The heat pipe air-conditioning system for the data room of claim 1, wherein the radiation refrigeration module group (5) comprises a heat preservation frame (18), refrigeration working medium pipes (17), a fully transparent cover plate (19) and a radiation plate (20), an opening is formed in the top surface of the heat preservation frame (18), the fully transparent cover plate (19) is embedded in the opening, the refrigeration working medium pipes (17) extend into the heat preservation frame (18) from one side of the heat preservation frame (18), are uniformly distributed in the heat preservation frame (18) in an S shape and extend out from the other side, the radiation plate (20) is arranged between the bottom surfaces of the refrigeration working medium pipes (17) and the heat preservation frame (18), and the refrigeration working medium pipes (17) are connected with the radiation plate (20) in a brazing mode to form surface contact.

3. The heat pipe air conditioning system for data room of claim 2, wherein the upper surface of the radiation plate (20) is coated with a spectrally selective film.

4. Heat pipe air conditioning system according to claim 1, wherein the height of the liquid reservoir (6) is higher than the highest point of each evaporator (2) and lower than the height of the gas collector (3).

5. The heat pipe air conditioning system for data room of claim 1, wherein the radiation refrigeration module set (5) is installed in an inclined manner, and the end of the radiation refrigeration module set (5) connected with the condenser (4) is higher than the end of the radiation refrigeration module set (5) connected with the liquid accumulator (6).

6. The heat pipe air conditioning system for data room of claim 1, wherein the output end of the PLC control module (7) is connected with a display (15).