A heat pump system as an alternative to cooling towers

Abstract

The utility model discloses a kind of heat pump systems of alternative cooling tower, including circulating cooling water section, water source heat pump and heating section, water source heat pump is located between circulating cooling water and heating section, water source heat pump circulation flow has medium, medium can be transformed between liquid phase and gas phase, medium is used to absorb the heat of circulating cooling water section, and heat part size that can be transmitted to heating section according to heating demand control;The waste heat of originally wasted circulating cooling water system is utilized, energy consumption and water resources are reduced, and according to the heating needs to control condensing fan to release excess heat, avoid the problem that system shutdown or unstable operation is caused due to heat cannot be absorbed when heating demand is small, improve the adaptability and operating reliability of system.

Description

Technical Field

[0001] This utility model relates to the field of thermal energy engineering and industrial energy conservation technology, specifically a heat pump system that can replace a cooling tower. Background Technology

[0002] In modern industrial production processes, such as chemical, power, metallurgy, and data center industries, a large amount of low-temperature waste heat is generated. Most processes use open-loop circulating cooling water systems to remove the waste heat, which is eventually discharged into the atmosphere. This not only wastes a lot of resources but also causes a certain amount of water vapor loss. Especially in Northwest my country, with industrial development, the demand for water from various enterprises is increasing, and the problem of water shortage is attracting more and more attention.

[0003] If the temperature of the circulating cooling water can be reduced while the waste heat can be recovered and utilized, and a large amount of water resources are not consumed, it will generate huge economic, environmental and social benefits. Water source heat pump is a power device that uses water as a heat source and cold source. It can transfer energy from low-grade heat energy to high-grade heat energy by inputting a small amount of high-quality electrical energy, thereby meeting people's energy needs. It is a pollution-free renewable energy technology.

[0004] However, the cooling demand in industrial production is continuous and stable, while the heating demand of users (domestic heating) is often volatile. When the heating demand is small or zero, how to handle all the heat absorbed from the circulating cooling water to ensure the stable satisfaction of the cooling demand of industrial production is a key problem that existing technologies need to solve. In view of the above background, a water source heat pump system to replace the cooling tower is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a heat pump system that can replace a cooling tower, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a heat pump system that replaces a cooling tower, comprising a circulating cooling water section, a water source heat pump, and a heating section. The water source heat pump is located between the circulating cooling water and the heating section. A medium circulates in the water source heat pump. The medium can transform between a liquid phase and a gas phase. The medium is used to absorb heat from the circulating cooling water section, and the amount of heat transferred to the heating section can be controlled according to the heating demand.

[0007] As a preferred technical solution, the cooling water section includes an inlet pipe, an outlet pipe, and a cooling water pump. The inlet pipe and the outlet pipe are connected to the water source heat pump, and the cooling water pump is installed on the inlet pipe.

[0008] As a preferred technical solution, the water source heat pump includes an evaporator, a compressor, a solenoid valve, a condenser, and an expansion valve connected in sequence by pipes. The evaporator and the expansion valve are connected by pipes to allow the medium to circulate. An adjustment section is provided between the compressor and the expansion valve.

[0009] As a preferred technical solution, the regulating unit includes a second solenoid valve and a condenser fan connected by a pipeline. The second solenoid valve can open and close to regulate the flow rate of the medium through the condenser fan, and the condenser fan releases the heat of the medium flowing through it into the surrounding environment.

[0010] As a preferred technical solution, the heating section includes a hot water tank, a heat user, and a hot water pump connected in sequence by pipes, and the hot water tank and the hot water pump are connected to the water source heat pump through pipes.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] By utilizing the waste heat of the previously wasted circulating cooling water system, energy consumption and water resources are reduced. Furthermore, the release of excess heat from the condenser fan is controlled according to heating needs, avoiding system shutdowns or unstable operation due to insufficient heat absorption during periods of low heating demand. This improves the system's adaptability and operational reliability. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of a heat pump system;

[0014] In the diagram: 1. Cooling water pump; 2. Evaporator; 3. Compressor; 4. Condenser; 5. Solenoid valve 2; 6. Solenoid valve 1; 7. Expansion valve; 8. Condenser fan; 9. Hot water tank; 10. Heat user; 11. Hot water pump; 12. Inlet pipe; 13. Outlet pipe; 14. Circulating cooling water section; 15. Water source heat pump; 16. Heating section. Detailed Implementation

[0015] The following is a detailed description of a heat pump system that is an alternative to a cooling tower according to an embodiment of the present disclosure, with reference to the accompanying drawings. To make the objectives, technical solutions, and advantages of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present disclosure.

[0016] Therefore, the following detailed description of embodiments of the present disclosure provided in conjunction with the accompanying drawings is not intended to limit the scope of the claimed disclosure, but merely to illustrate selected embodiments of the disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of the present disclosure without inventive effort are within the scope of protection of the present disclosure.

[0017] A heat pump system that replaces a cooling tower is provided, comprising a circulating cooling water section 14, a water source heat pump 15, and a heating section 16. The water source heat pump 15 is located between the circulating cooling water and the heating section 16. A medium flows through the water source heat pump 15, and the medium can change between liquid and gas phases. The medium is used to absorb heat from the circulating cooling water section 14, and the amount of heat transferred to the heating section 16 can be controlled according to the heating demand. The medium is used to absorb the heat carried by the circulating cooling water section 14, and under the control of the system, the heat is transferred to the heating section 16 according to the actual heating demand, so as to achieve controllable heat distribution. The heat pump system has a controller that receives signals to obtain the actual heating demand.

[0018] The circulating cooling water section 14 includes an inlet pipe 12, an outlet pipe 13, and a cooling water pump 1. The inlet pipe 12 and the outlet pipe 13 are connected to the evaporator 2 of the water source heat pump 15 to form a closed circulation loop. The cooling water pump 1 is installed on the inlet pipe 12 to provide power for the circulating cooling water and ensure that it can continuously flow through the evaporator 2 of the water source heat pump 15.

[0019] The water source heat pump 15 includes an evaporator 2, a compressor 3, a solenoid valve 6, a condenser 4, and an expansion valve 7 connected in sequence by pipes. The evaporator 2 and the expansion valve 7 are connected by pipes to form a complete medium circulation loop. The water source heat pump 15 is responsible for heat absorption, heating and transfer. An adjustment section is provided between the compressor 3 and the expansion valve 7.

[0020] The regulating unit includes a solenoid valve 5 and a condenser fan 8 connected by a pipe. The solenoid valve 5, as a flow control element, can be fully opened, fully closed, or its opening adjusted according to the controller's control signal. For example, it can be adjusted according to the different heating demands in summer or winter, thereby precisely controlling the flow rate of the medium flowing through the condenser fan 8. The condenser fan 8 (air cooler) forces the heat carried by the medium flowing through its internal coils to be released into the surrounding environment through convection. By controlling the solenoid valve 5, a certain proportion of heat can be discharged through the condenser fan 8, thus achieving precise control of the final heating output.

[0021] The heating section 16 includes a hot water tank 9, a heat user 10, and a hot water pump 11 connected in sequence by pipes. The hot water tank 9 and the hot water pump 11 are connected to the condenser 4 of the water source heat pump 15 through pipes to form a hot water circulation loop. The hot water pump 11 drives low-temperature water to flow through the condenser 4, absorbs the heat released by the medium, and then heats up and stores it in the hot water tank 9. Finally, it is supplied to the heat user 10 (radiators, fan coil units, etc.). A temperature sensor is installed in the hot water tank 9 to detect the hot water temperature, and the temperature sensor is connected to the controller signal.

[0022] In summary, by utilizing the waste heat of the previously wasted circulating cooling water system, energy consumption and water resources are reduced. Furthermore, by controlling the release of excess heat by the condenser fan 8 according to heating needs, the system avoids shutdowns or unstable operation due to insufficient heat absorption during periods of low heating demand, thereby improving the system's adaptability and operational reliability.

[0023] The system operates through the following steps:

[0024] a. The circulating cooling water is pumped into the evaporator 2 by the circulating water pump. After releasing heat, it is returned to the industrial production process and reused as cooling water.

[0025] b. The hot water required by heat user 10 is sent to condenser 4 by hot water pump 11. After absorbing heat, the temperature rises and becomes hot water, which enters hot water tank 9 and then returns to heat user 10 for use.

[0026] c. Select either Mode 1 or Mode 2 operation based on the heating demand of heat user 10;

[0027] Mode 1: When the heating demand is large, the medium absorbs the heat carried by the circulating cooling water in the evaporator 2 and changes from a liquid phase to a gaseous phase. Then it enters the compressor 3 for heating and pressurization to become a high-pressure gaseous medium. The high-pressure gaseous medium flows into the condenser 4, releases the heat it carries to the hot water on the water side, and then condenses into a liquid phase. The liquid medium then passes through the solenoid valve 6 and the expansion valve 7 for throttling, and changes back into a low-temperature, low-pressure gas-liquid mixture, returning to the evaporator 2 to complete the cycle.

[0028] Mode 2: When the heating demand is relatively small, the medium absorbs the heat carried by the circulating cooling water in the evaporator 2, changing from a liquid phase to a gaseous phase. It then enters the compressor 3 for heating and pressurization, becoming a high-pressure gaseous medium. The high-pressure gaseous medium flows into the condenser 4, releasing some of the heat it carries to the hot water on the water side. After passing through solenoid valve 6 or a combination of solenoid valve 6 and solenoid valve 2, the medium passes through solenoid valve 6 and the condenser fan 8, releasing the remaining heat into the surrounding environment before turning into a liquid phase. The liquid medium then passes through the expansion valve 7 for throttling, changing back into a low-temperature, low-pressure gas-liquid mixture, and returns to the evaporator 2 to complete the cycle.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A heat pump system that replaces a cooling tower, characterized in that, It includes a circulating cooling water section, a water source heat pump, and a heating section. The water source heat pump is located between the circulating cooling water and the heating section. The water source heat pump circulates a medium that can change between liquid and gas phases. The medium is used to absorb heat from the circulating cooling water section, and the amount of heat transferred to the heating section can be controlled according to the heating demand.

2. The heat pump system that replaces a cooling tower according to claim 1, characterized in that, The cooling water section includes an inlet pipe, an outlet pipe, and a cooling water pump. The inlet pipe and the outlet pipe are connected to the water source heat pump, and the cooling water pump is installed on the inlet pipe.

3. A heat pump system as an alternative to a cooling tower according to claim 1, characterized in that, The water source heat pump includes an evaporator, a compressor, a solenoid valve, a condenser, and an expansion valve connected in sequence by pipes. The evaporator and the expansion valve are connected by pipes to allow the medium to circulate. An adjustment section is provided between the compressor and the expansion valve.

4. A heat pump system as an alternative to a cooling tower according to claim 3, characterized in that, The regulating unit includes a second solenoid valve and a condenser fan connected by a pipe. The second solenoid valve can open and close to regulate the flow rate of the medium through the condenser fan, and the condenser fan releases the heat of the medium flowing through it into the surrounding environment.

5. A heat pump system as an alternative to a cooling tower according to claim 1, characterized in that, The heating section includes a hot water tank, a heat user, and a hot water pump connected in sequence by pipes. The hot water tank and the hot water pump are connected to the water source heat pump through pipes.

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