An air conditioning system and control method for utilizing data center waste heat for heating

Abstract

The application discloses an air conditioning system and a control method for heating by using waste heat of a data center, and the system comprises a data center machine room, an air conditioning machine room and an office room, wherein the data center machine room, the air conditioning machine room and the office room are arranged adjacently or close to each other on the same layer; two rows of equipment cabinets in the data center machine room form a group, and the closed cold channel is formed by the two rows of equipment cabinets, a passage door, a passage top and an electrostatic floor; the constant temperature and humidity air conditioner sends cold air into the closed cold channel through a air supply pipe; the electrostatic floor of the office room is provided with an electric air supply port; the electrostatic floor of the data center machine room is provided with an adjustable floor air supply port; a first electric air volume regulating valve and a second electric air volume regulating valve are respectively arranged on a partition wall between the office room and the air conditioning machine room and on the electrostatic floor of the air conditioning machine room; and an air supply fan is arranged on the partition wall to send air in the data center machine room into the office room. The application realizes the system circulation of heating the office room by using the waste heat of the data center machine room, and reduces the energy consumption of the system operation.

Description

Technical Field

[0001] This invention relates to the field of waste heat utilization in data centers, and specifically to an air conditioning system and control method that utilizes waste heat from data centers for heating. Background Technology

[0002] Data center server rooms are filled with electronic information equipment that generates a lot of heat. According to the “Data Center Design Specification”, about 97% of the power consumption of a data center is converted into heat. In order to remove the heat emitted by electronic information equipment and maintain a relatively stable operating temperature for the equipment in the server room, precision air conditioners are usually installed in the server room to remove the waste heat generated by the server rack equipment.

[0003] Most data center offices require heating and air conditioning in winter, and solutions such as split air conditioners, multi-split air conditioners, or centralized heating are generally used to meet the room temperature requirements in winter.

[0004] Data center server rooms require cooling in winter, while nearby office spaces require heating, both consuming energy such as electricity and heat. This invention addresses the specific cooling and heating needs of data center server rooms and office spaces in winter by proposing a shared air conditioning system solution. This system utilizes waste heat from the data center server room as a heat source for winter heating and air conditioning in office spaces, thereby reducing the energy consumption of the data center's winter air conditioning system. Summary of the Invention

[0005] The purpose of this invention is to provide a system for utilizing waste heat from data center computer rooms in winter. This system allows for the delivery of cool air from constant temperature and humidity air conditioners into the cold aisle of the data center computer room (composed of equipment cabinets, floor-to-ceiling access, aisle doors, and electrostatic flooring) during summer. Return air then enters the constant temperature and humidity air conditioner via an electric airflow regulating valve. In winter, cool air from the constant temperature and humidity air conditioner enters the cold aisle (composed of equipment cabinets, floor-to-ceiling access, aisle doors, and electrostatic flooring), carrying away the heat generated by the equipment cabinets. The high-temperature air then enters the air supply space under the electrostatic floor through adjustable floor vents, is pressurized by a blower, and is delivered to office spaces through electric vents to provide heat. Finally, the air enters the constant temperature and humidity air conditioner via an electric airflow regulating valve, thus achieving multi-level utilization of waste heat from the data center computer room in winter.

[0006] Another objective of this invention is to provide a control method for the aforementioned data center computer room waste heat utilization system in winter. This control method can automatically adjust the operating frequency of the blower, the opening degree of the first electric air volume regulating valve and the second electric air volume regulating valve according to the number of electric air vents opened in the office room in winter, and adaptively control the air volume in the office room to meet the heating needs of the people in the office room.

[0007] To further achieve the above objectives, the present invention adopts the following technical solution: an air conditioning system utilizing waste heat from a data center for heating, comprising a data center server room, an air conditioning room, and office space, wherein the data center server room, air conditioning room, and office space are arranged adjacent to or close to each other on the same floor, and each room is equipped with an electrostatic floor; the office space under the electrostatic floor and the air conditioning room are separated by a partition wall; two rows of equipment racks in the data center server room form a group, and the two rows of equipment racks, the passageway door, the passageway ceiling, and the electrostatic floor form a closed cold aisle; The air conditioning room is equipped with constant temperature and humidity air conditioning units, which deliver cold air into the closed cold aisle of the data center computer room through air supply ducts; the office room has electric air supply outlets installed on the electrostatic floor, which are located under the desks and correspond one-to-one with the desks. Adjustable floor air vents are installed on the electrostatic floor of the data center server room. A first electric air volume regulating valve is installed on the partition wall between the office room and the air conditioning server room, and a second electric air volume regulating valve is installed on the electrostatic floor of the air conditioning server room. A fan is installed on the partition wall to deliver air from the data center server room to the office room.

[0008] Optionally, when the office room, data center server room, and air conditioning server room are arranged close to each other, other rooms are arranged between the office room and the air conditioning server room, and a connecting ventilation duct is installed between the office room and other rooms to connect the office room and the air conditioning server room.

[0009] Preferably, the air conditioning room and the data center room are arranged adjacent to each other.

[0010] Optionally, the constant temperature and humidity air conditioner adopts an upward air supply and central return air method. The return air vent of the constant temperature and humidity air conditioner is located in the middle of the constant temperature and humidity air conditioner. The constant temperature and humidity air conditioner provides cooling capacity to the air conditioning room and maintains relatively constant temperature and humidity conditions inside the data center computer room.

[0011] Optionally, the desk is equipped with an electric air vent switch, which changes the air volume of the electric air vent by adjusting its opening.

[0012] Optionally, a control cabinet is installed on the partition wall of the office room to monitor the number of electric air vents opened in the office room and control the operating frequency of the air supply fan and the opening degree of the first electric air volume regulating valve and the second electric air volume regulating valve.

[0013] A control method for the aforementioned air conditioning system utilizing waste heat from a data center for heating, in summer operation, specifically during the cooling operation of the data center computer room, includes: low-temperature air from a constant temperature and humidity air conditioner enters the enclosed cold aisle within the data center computer room through an air supply duct from the top of the aisle; the low-temperature air passes through the equipment cabinets, carrying away the heat dissipated during the operation of the equipment cabinets, causing the air temperature to rise; then, it enters the air supply space under the electrostatic floor through an adjustable floor air outlet, and then enters the constant temperature and humidity air conditioner through a second electric air volume regulating valve and the return air outlet of the constant temperature and humidity air conditioner, where it is treated to a low temperature of approximately 18°C; this cycle continues.

[0014] A control method for the aforementioned air conditioning system utilizing waste heat from a data center for heating, in winter operation mode, during data center cooling and office heating operation mode, includes: 1) The low-temperature air supply of the constant temperature and humidity air conditioner enters the closed cold aisle in the data center computer room through the air supply duct from top to bottom. The low-temperature air passes through the equipment cabinet, carrying away the heat emitted by the equipment cabinet during operation. The air temperature rises and then enters the air supply space under the electrostatic floor through the adjustable floor air outlet. 2) The high-temperature air entering the air supply space under the electrostatic floor goes through two paths: Path 1: through the second electric air volume regulating valve into the return air vent of the constant temperature and humidity air conditioner; Path 2: through the air supply fan and electric air supply vent into the office room, using the waste heat from the data center computer room to heat the office room, and then through the first electric air volume regulating valve into the return air vent of the constant temperature and humidity air conditioner. 3) When the electric air outlet is open at a small ratio, the air supply fan is not turned on. The air circulation power of the constant temperature and humidity air conditioner is used to force the air into the gap between the air supply fan blades and into the electric air outlet and office room. When the electric air outlet is open at a large ratio, the air supply fan is turned on. The minimum operating frequency of the air supply fan is 35Hz. When all the electric air outlets are open, the operating frequency of the air supply fan is 50Hz.

[0015] Preferably, the low-temperature air supply temperature is 18°C, and the air temperature rise temperature is 27°C.

[0016] Preferably, the operating mode of the electric air outlet, the first electric air volume regulating valve, and the second electric air volume regulating valve is as follows: ①The relationship between the percentage (b%) of the number of electrically operated air outlets in operation and the operating frequency (m Hz) of the blower is as follows: ; When the percentage of the number of electric air vents open is less than 10%, the air supply fan is not turned on. Air enters the electric air vents and office rooms through the gaps between the air supply fan blades, reducing the energy consumption of the air supply fan. When the percentage of the number of electric air vents open is less than or equal to 10% and less than 100%, the air supply fan is turned on. The operating frequency increases with the increase of the percentage of electric air vents open. Air enters the office rooms after being pressurized by the air supply fan. ②The relationship between the opening degree n% of the first electric air volume regulating valve and the proportion b% of the number of electric air outlets that are open is as follows: ; When the percentage of the number of electric air outlets open is less than 50%, the opening degree of the first electric air volume regulating valve is 50%, and the opening degree of the second electric air volume regulating valve is 50%. When the percentage of the number of electric air outlets open is less than or equal to 50% and less than or equal to 100%, the opening degree of the first electric air volume regulating valve is equal to the percentage of the number of electric air outlets open, b%, and the opening degree of the second electric air volume regulating valve is (1-n)%.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention integrates the characteristics of data center computer rooms generating a large amount of heat and requiring year-round cooling during operation, and office rooms requiring heating in winter. It utilizes the waste heat generated by the air conditioning in the data center computer room to raise the air temperature in the office room, thus providing heating for the office room in winter. The air cooled down after passing through the office room is then sent back to the constant temperature and humidity air conditioning unit, realizing a system cycle that uses the waste heat of the data center computer room to heat the office room, thereby reducing the system's operating energy consumption.

[0018] This invention enables on-demand air supply by adjusting the operating frequency and air volume of the air supply fan, as well as the opening degrees of the first and second electric air volume regulating valves, based on the number of electric air supply vents opened in the office space during winter. When the number of electric air supply vents opened changes (e.g., the number of vents opened increases, and the percentage b% of the total number of vents opened increases), the operating frequency of the air supply fan is adjusted accordingly (the operating frequency of the air supply fan is adjusted according to the relationship between the percentage b% of the total number of vents opened and the operating frequency m Hz of the air supply fan, and the operating frequency m Hz increases), the opening degree of the first electric air volume regulating valve is adjusted accordingly (the opening degree n% of the first electric air volume regulating valve is adjusted according to the relationship between the percentage n% of the total number of vents opened and the percentage b% of the total number of vents opened, and the opening degree n% increases), and the opening degree of the second electric air volume regulating valve is adjusted accordingly (the opening degree (1-n)% decreases). To meet the winter heating needs of personnel in office buildings, and to maintain a constant total air volume through the first and second electric air volume regulating valves, ensuring that the total air volume entering the return air vent of the constant temperature and humidity air conditioner and being delivered to the data center server room remains constant. Attached Figure Description

[0019] Figure 1 Floor plan showing the adjacent office space and air conditioning room; Figure 2 Floor plan showing the proximity of office space and air conditioning room; Figure 3 This is a schematic diagram of airflow in a data center server room under cooling conditions (office rooms and air-conditioned server rooms are arranged adjacent to each other, under summer conditions). Figure 4 This is a schematic diagram of airflow in a data center server room under cooling conditions (office rooms and air-conditioned server rooms are arranged close together, under summer conditions). Figure 5 A schematic diagram of airflow during data center cooling and office heating operations (office rooms and air-conditioned rooms are arranged adjacent to each other). Figure 6 A schematic diagram of airflow during data center cooling and office heating operations (office rooms and air-conditioned rooms are arranged close to each other).

[0020] Explanation of reference numerals in the attached diagram: 1-Data center server room, 2-Air conditioning room, 3-Office room, 4-Other rooms, 5-Static floor, 6-Partition wall, 7-Connecting ventilation duct, 8-Equipment cabinet, 9-Passage door, 10-Passage ceiling, 11-Enclosed cold aisle, 12-Constant temperature and humidity air conditioner, 13-Adjustable floor air outlet, 14-First electric air volume regulating valve, 15-Second electric air volume regulating valve, 16-Electric air outlet, 18-Air supply fan, 19-Air supply duct, 20-Control cabinet, 21-Constant temperature and humidity air conditioner return air outlet. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0022] Example 1 An air conditioning system that utilizes waste heat from data centers for heating, such as Figure 1 , Figure 2 As shown, the room includes a data center server room 1, an air conditioning server room 2, and an office room 3. The data center server room 1, the air conditioning server room 2, and the office room 3 are arranged adjacent to each other on the same floor or close to each other. The air conditioning server room 2 is usually arranged adjacent to the data center server room 1. Each room is equipped with an anti-static floor 5. The office room 3 located under the anti-static floor 5 and the air conditioning server room 2 are separated by a partition wall 6. When the office room 3, the data center server room 1, and the air conditioning server room 2 are arranged close to each other, that is, when the office room 3 and the air conditioning server room 2 are arranged, there are other rooms 4. A connecting ventilation duct 7 is installed between the office room 3 and other rooms 4. The connecting ventilation duct 7 is used to connect the office room 3 and the air conditioning server room 2.

[0023] In this invention, two rows of equipment racks 8 form a group within the data center server room 1. The enclosed space consists of the two rows of equipment racks 8, passageway doors 9 installed at both ends of the racks, a passageway top 10 located at the top of the racks, and an electrostatic floor 5. Cold air is supplied into this enclosed space from the passageway top 10; this enclosed space is also called the enclosed cold aisle 11. A constant temperature and humidity air conditioner 12 is arranged within the air conditioning room 2, using a top-supply, middle-return airflow method. The return air vent 11 of the air conditioner 12 is located in the middle of the unit, supplying cold air through the air supply duct 19 into the enclosed cold aisle 11 of the data center server room. The air conditioner 12 provides cooling to the air conditioning room 2, maintaining a relatively constant temperature and humidity condition inside the data center server room 1.

[0024] In this invention, an adjustable floor air outlet 13 (with manually adjustable opening) is installed on the electrostatic floor 5 of the data center server room 1. A first electric air volume regulating valve 14 is installed on the partition wall between the office room 3 and the air conditioning server room 2. A second electric air volume regulating valve 15 is installed on the electrostatic floor 5 of the air conditioning server room 2. The air conditioning return air enters the constant temperature and humidity air conditioner 12 through the first and / or second electric air volume regulating valves.

[0025] In this invention, the adjustable floor air outlet 13 can be manually adjusted to change its open / closed state, maintaining a basically uniform airflow across different enclosed cold aisles 11, and ensuring that the temperature and humidity within each group of enclosed cold aisles 11 remain at their design values. If the airflow in the enclosed cold aisle closest to the air conditioning room 2 is greater than in other enclosed cold aisles, causing an imbalance in the airflow across the enclosed cold aisles, maintenance personnel can manually adjust the opening of the adjustable floor air outlet 13 in the enclosed cold aisle closest to the air conditioning room 2 to reduce the airflow. This airflow adjustment maintains the temperature and humidity within each enclosed cold aisle at their design values ​​(determined according to relevant specifications). The adjustable floor air outlet 13 is a mature product with load-bearing capacity and adjustable airflow.

[0026] In this invention, office room 3 is arranged with desks, and electric air vents 16 are installed on the electrostatic floor 5 of office room 2, below each desk. Each electric air vent 16 corresponds to a desk, and an electric air vent switch is installed on each desk. The electric air vent switch and the electric air vent 16 are connected by a control cable (blue dotted line in the diagram). Office workers adjust the opening of the electric air vent 16 according to their own comfort level, changing the airflow. Hot air is delivered into the office room through the electric air vent 16, meeting the winter heating needs of the office staff. Each desk has an airflow adjustment function, and each desk controls its corresponding electric air vent 16, adjusting the energy delivery based on individual comfort levels. This achieves a function similar to a workstation air conditioner, providing office workers with a warm breeze at their workstations, ensuring localized comfort without requiring overall space temperature control.

[0027] In this invention, a blower 18 is installed on the partition wall 6 to deliver air from the data center server room 1 into the office room 3. The blower 18 automatically adjusts its operating frequency and air volume according to the number of electrically operated air outlets 16 that are open, ensuring the air delivery effect of the electrically operated air outlets 16, and is linked with the first electrically operated air volume switch valve 14 (opening and closing simultaneously). The anti-static floor 5 is a conventional device that can provide electrostatic protection and protect the server racks. The elevated installation of the anti-static floor provides a path for air distribution under the floor.

[0028] In this invention, the air supply duct 19 connects the constant temperature and humidity air conditioner 12 and the sealed cold aisle of the data center server room 1 to cool the server racks in the data center server room 1. The control cabinet 20 is installed on the partition wall of the office room 3 and is used to monitor the number of opening electric air supply vents 16 in the office room 2, control the operating frequency of the blower 18, and the opening degree of the first electric air volume regulating valve 14 and the second electric air volume regulating valve 15. The electric air supply vents 16 are connected to the control cabinet 20 via signal cables (green dashed lines), and the blower 18, the first electric air volume regulating valve 14, and the second electric air volume regulating valve 14 are connected to the control cabinet 20 via control cables (red dashed lines). The control cabinet 20 receives the opening and closing information of the electric air supply vents 16 via signal cables, and controls the operating status of the blower 18, the first electric air volume regulating valve 14, and the second electric air volume regulating valve 15 according to the number of opening and closing of the electric air supply vents 16 via control cables.

[0029] As described above, this invention utilizes waste heat from data center computer rooms to provide winter heating for office buildings. It combines the characteristics of data center computer rooms generating a large amount of heat and requiring year-round cooling during operation with the need for heating in office buildings during winter. By using the waste heat generated by the air conditioning in the data center computer room, the air temperature in the office buildings is increased, thus providing winter heating. The cooled air after passing through the office buildings is then sent back to the constant temperature and humidity air conditioning unit, realizing a system cycle of using waste heat from the data center computer room to heat office buildings, thereby reducing the system's energy consumption.

[0030] Example 2 A control method for the air conditioning system using waste heat from a data center for heating as described in Example 1, applicable only to the data center computer room cooling mode (summer mode): The operating status and control mode of each device are shown in Table 1 below: Table 1 1) The low-temperature air supply (around 18℃, adjustable) from the constant temperature and humidity air conditioner 12 enters the enclosed cold aisle 11 in the data center server room 1 through the air supply duct 19 and from the top of the aisle 10. The low-temperature air passes through the equipment rack 8, carrying away the heat dissipated during the operation of the equipment rack 8, and the air temperature rises (to around 27℃, adjustable) (the data center server room has a separate power and environmental monitoring system to monitor the temperature and humidity of the server room; the relevant temperature setpoints can be adjusted through the power and environmental monitoring system). Then, it enters the air supply space under the electrostatic floor 6 through the adjustable floor air outlet 13, and then through the second electric air volume regulating valve 15 and the constant temperature and humidity air conditioner return air outlet 21 (the air conditioning is recirculated, and the cold air supplied must return to the air conditioner) and enters the constant humidity air conditioner 12, where it is treated to a low temperature of around 18℃. This cycle continues. The air flow path is as follows: Figure 3 , Figure 4 As shown, Figure 3 This is a schematic diagram of airflow in a data center server room under cooling conditions (office rooms and air-conditioned server rooms are arranged adjacent to each other, under summer conditions). Figure 4 This is a schematic diagram of airflow in a data center server room under cooling conditions (office rooms and air-conditioned server rooms are arranged close together, under summer conditions).

[0031] Example 3 A control method for an air conditioning system utilizing waste heat from a data center as described in Example 1, wherein the system operates under the following conditions: data center computer room cooling and office room heating (winter condition): The operating status and control mode of each device are shown in Table 2 below: Table 2 1) The low-temperature air supply (around 18℃, adjustable) from the constant temperature and humidity air conditioner 12 enters the closed cold aisle 11 in the data center server room 1 through the air supply duct 19 and from the top 10. The low-temperature air passes through the equipment rack 8, carrying away the heat emitted by the equipment rack 8 during operation, and the air temperature rises (to around 27℃, adjustable) (the data center server room has a separate power and environmental monitoring system to monitor the temperature and humidity of the server room; the relevant temperature setpoints can be adjusted through the power and environmental monitoring system), and then enters the air supply space under the electrostatic floor 5 through the adjustable floor air outlet 13.

[0032] 2) The approximately 27°C high-temperature air entering the air supply space under the electrostatic floor passes through: Path 1: Enters the return air vent 21 of the constant temperature and humidity air conditioner via the second electric air volume regulating valve 15; Path 2: The air is delivered to office room 3 via blower 18 and electric air outlet 16, and the waste heat from data center computer room 1 is used to heat office room 3. Then, it enters the return air outlet 12 of constant temperature and humidity air conditioner via the first electric air volume regulating valve 14.

[0033] By using path one and path two, the total air volume entering the return air vent 21 of the constant temperature and humidity air conditioner is kept constant. If the number of electric air supply vents opened decreases and the air volume through path two decreases, the opening degree of the second electric air volume regulating valve 15 is increased to increase the air volume through path one.

[0034] 3) Operating parameters (such as the opening degree of the electric air volume regulating valve 15 involved in Path 1, and the blower 18, electric air outlet 16, and first electric air volume regulating valve 14 involved in Path 2) of the second electric air volume regulating valve 15. The proportion of the number of electric air outlets open to the total number is a key factor reflecting the air volume demand of Path 2. When the number of electric air outlets open is large, it is necessary to turn on the blower 18 to ensure that the air volume passes through Path 2 stably and reliably. The operating frequency of the blower 18 is another important factor affecting the air volume of Path 2. When the opening ratio of the electric air outlet 16 is small (<10%), the blower 18 is not turned on. The air circulation power of the constant temperature and humidity air conditioner 12 is used to force the air into the gap between the blades of the blower 18 and into the electric air outlet 16 and the office room 3. When the opening ratio of the electric air outlet 16 is large (10~100%), the blower 18 is turned on. The minimum operating frequency of the blower is 35Hz. When all the electric air outlets 16 are open, the operating frequency of the blower is 50Hz. To reduce the complexity of adjusting the electric air volume regulating valves, when the opening ratio of the electric air outlet 16 is small (<50%), the opening degree of the first electric air volume regulating valve 14 and the second electric air volume regulating valve 15 is uniformly set to 50%; when the opening ratio is 50% to 100%, the opening degree of the first electric air volume regulating valve 14 is consistent with the proportion of the number of open electric air outlets 16 to the total number. The specific operating mode is as follows: ①The relationship between the percentage b% of the number of electrically operated air outlets 16 that are open and the operating frequency m Hz of the blower 18 is as follows: When the percentage of the number of electric air vents 16 that are open is less than 10%, the blower 18 is not turned on (operating frequency 0Hz), and air enters the electric air vents 16 and the office 3 through the gap between the blower blades, reducing the energy consumption of the blower. When the percentage of the number of electric air vents 16 that are open is less than 10% (10% ≤ b% < 100%), the blower 18 is turned on, and the operating frequency increases with the increase of the percentage of electric air vents that are open. The air enters the office after being pressurized by the blower.

[0035] ②The relationship between the opening degree n% of the first electric air volume regulating valve 14 and the proportion b% of the number of electric air outlets 16 that are open is as follows: When the percentage of the number of electric air outlets 16 that are open is less than 50%, the opening degree of the first electric air volume regulating valve 14 is 50%, and the opening degree of the second electric air volume regulating valve 15 is 50%. When the percentage of the number of electric air outlets 16 that are open is 50% ≤ b% ≤ 100%, the opening degree of the first electric air volume regulating valve 14 is n% equal to the percentage of the number of electric air outlets 16 that are open, and the opening degree of the second electric air volume regulating valve 15 is (1-n)%.

[0036] Airflow path such as Figure 5 , Figure 6 As shown, Figure 5 A schematic diagram of airflow during data center cooling and office heating operations (office rooms and air-conditioned rooms are arranged adjacent to each other). Figure 6 A schematic diagram of airflow during data center cooling and office heating operations (office rooms and air-conditioned rooms are arranged close to each other).

[0037] The above description is merely a specific embodiment of the present invention, and the scope of protection of the present invention is not limited thereto. Any transformations or substitutions that can be conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An air conditioning system that utilizes waste heat from a data center for heating, characterized in that, It includes a data center server room, an air conditioning server room, and office space. The data center server room, air conditioning server room, and office space are arranged adjacent to each other on the same floor or close to each other. Each room is equipped with an anti-static floor. The office space and the air conditioning server room under the anti-static floor are separated by a partition wall. The data center server room consists of two rows of equipment cabinets as a group. The two rows of equipment cabinets, the passage door, the passage ceiling, and the anti-static floor form a closed cold aisle. The air conditioning room is equipped with constant temperature and humidity air conditioning units, which deliver cold air into the closed cold aisle of the data center computer room through air supply ducts; the office room has electric air supply outlets installed on the electrostatic floor, which are located under the desks and correspond one-to-one with the desks. Adjustable floor air vents are installed on the electrostatic floor of the data center server room. A first electric air volume regulating valve is installed on the partition wall between the office room and the air conditioning server room, and a second electric air volume regulating valve is installed on the electrostatic floor of the air conditioning server room. A fan is installed on the partition wall to deliver air from the data center server room to the office room.

2. The air conditioning system for heating using waste heat from a data center according to claim 1, characterized in that, When the office rooms, data center server rooms, and air conditioning server rooms are arranged close to each other, other rooms are arranged between the office rooms and the air conditioning server rooms, and a connecting ventilation duct is installed between the office rooms and other rooms to connect the office rooms and the air conditioning server rooms.

3. The air conditioning system for heating using waste heat from a data center according to claim 2, characterized in that, The air conditioning room is located adjacent to the data center room.

4. The air conditioning system for heating using waste heat from a data center according to claim 3, characterized in that, The constant temperature and humidity air conditioner adopts an upward air supply and central return air method. The return air vent of the constant temperature and humidity air conditioner is located in the middle of the air conditioner. The constant temperature and humidity air conditioner provides cooling capacity to the air conditioning room and maintains relatively constant temperature and humidity conditions inside the data center.

5. The air conditioning system for heating using waste heat from a data center according to claim 4, characterized in that, The desk is equipped with an electric air vent switch, which changes the air volume by adjusting the opening of the electric air vent.

6. The air conditioning system for heating using waste heat from a data center according to claim 5, characterized in that, A control cabinet is installed on the partition wall of the office room to monitor the number of electric air vents opened in the office room and to control the operating frequency of the air supply fan and the opening degree of the first electric air volume regulating valve and the second electric air volume regulating valve.

7. A control method for an air conditioning system using waste heat from a data center for heating as described in claim 6, characterized in that, In summer operation, when only the data center is in cooling mode, the following process occurs: the low-temperature air supply from the constant temperature and humidity air conditioner enters the enclosed cold aisle in the data center through the air supply duct from the top of the aisle. The low-temperature air passes through the equipment racks, carrying away the heat dissipated during the operation of the equipment racks. The air temperature rises, and then it enters the air supply space under the electrostatic floor through the adjustable floor air outlet. It then passes through the second electric air volume regulating valve and the return air outlet of the constant temperature and humidity air conditioner and enters the constant humidity air conditioner to be processed to a low temperature of about 18°C. This cycle continues.

8. A control method for an air conditioning system using waste heat from a data center for heating as described in claim 6, characterized in that, Winter operating conditions, including data center cooling and office heating, include: 1) The low-temperature air supply of the constant temperature and humidity air conditioner enters the closed cold aisle in the data center computer room through the air supply duct from top to bottom. The low-temperature air passes through the equipment cabinet, carrying away the heat emitted by the equipment cabinet during operation. The air temperature rises and then enters the air supply space under the electrostatic floor through the adjustable floor air outlet. 2) The high-temperature air entering the air supply space under the electrostatic floor goes through two paths: Path 1: through the second electric air volume regulating valve into the return air vent of the constant temperature and humidity air conditioner; Path 2: through the air supply fan and electric air supply vent into the office room, using the waste heat from the data center computer room to heat the office room, and then through the first electric air volume regulating valve into the return air vent of the constant temperature and humidity air conditioner. 3) When the electric air outlet is open at a small ratio, the air supply fan is not turned on. The air circulation power of the constant temperature and humidity air conditioner is used to force the air into the gap between the air supply fan blades and into the electric air outlet and office room. When the electric air outlet is open at a large ratio, the air supply fan is turned on. The minimum operating frequency of the air supply fan is 35Hz. When all the electric air outlets are open, the operating frequency of the air supply fan is 50Hz.

9. The control method according to claim 7 or 8, characterized in that, The low-temperature air supply temperature is 18°C, and the air temperature rise temperature is 27°C.

10. The control method according to claim 8, characterized in that, The operating modes of the electric air outlet, the first electric air volume regulating valve, and the second electric air volume regulating valve are as follows: ①The relationship between the percentage (b%) of the number of electrically operated air outlets in operation and the operating frequency (m Hz) of the blower is as follows: ； When the percentage of the number of electric air vents open is less than 10%, the air supply fan is not turned on. Air enters the electric air vents and office rooms through the gaps between the air supply fan blades, reducing the energy consumption of the air supply fan. When the percentage of the number of electric air vents open is less than or equal to 10% and less than 100%, the air supply fan is turned on. The operating frequency increases with the increase of the percentage of electric air vents open. Air enters the office rooms after being pressurized by the air supply fan. ②The relationship between the opening degree n% of the first electric air volume regulating valve and the proportion b% of the number of electric air outlets that are open is as follows: ； When the percentage of the number of electric air outlets open is less than 50%, the opening degree of the first electric air volume regulating valve is 50%, and the opening degree of the second electric air volume regulating valve is 50%. When the percentage of the number of electric air outlets open is less than or equal to 50% and less than or equal to 100%, the opening degree of the first electric air volume regulating valve is equal to the percentage of the number of electric air outlets open, b%, and the opening degree of the second electric air volume regulating valve is (1-n)%.

Images