Underground water ground source heat pump system and method for measuring energy consumption

Abstract

The invention discloses an underground water ground source heat pump system and method for measuring energy consumption, and the system comprises the following four stages of structures: a central workstation which consists of a PC host, a display and a printer and is used for centralized management of equipment and display of system energy efficiency ratio and energy consumption data; the controller is configured to control the controlled equipment through data acquisition, processing, algorithm execution and control command output; the sensor is used for collecting field signals, and the executing mechanism is used for executing control commands; the underground water ground source heat pump system comprises an outdoor heat exchange side, a heat pump machine room and tail end central air conditioning equipment and is used for providing energy supply service for the building.

Description

Technical Field

[0001] The present invention relates to the technical field of clean energy heating and cooling, and in particular to a groundwater source heat pump system and method for measuring energy consumption. Background Art

[0002] According to incomplete statistics, the most widely used shallow geothermal energy in Sichuan Province is in Chengdu, with a total application area of ​​about 3.7 million square meters. Overall, the development and utilization of shallow geothermal energy in our province is low, and the application area is less than 1% of the country. The ground source heat pump system currently built mainly stays in the management and control of the basic control unit. It has not added energy management functions on the basis of conventional management functions to improve the monitoring of groundwater ground source heat pump room equipment and end-user energy usage. It has not monitored various management indicators and data, and cannot truly grasp the actual operating energy consumption and energy saving of the ground source heat pump system. Summary of the invention

[0003] The purpose of the present invention is to provide a groundwater source heat pump system and method for measuring energy consumption, in order to solve the technical problems existing in the background technology.

[0004] The present invention provides the following technical solutions:

[0005] A groundwater source heat pump system for measuring energy consumption, comprising:

[0006] Central workstation, consisting of a PC host, monitor and printer, is used to centrally manage equipment and display system energy efficiency ratio and energy consumption data;

[0007] A controller configured to control the controlled device through data acquisition, processing, algorithm execution and control command output;

[0008] Sensors and actuators, the sensors are used to collect field signals, and the actuators are used to execute control commands;

[0009] The groundwater source heat pump system, including the outdoor heat exchange side, the heat pump room and the terminal central air-conditioning equipment, is used to provide energy supply services for the building.

[0010] In some embodiments, the controller integrates an energy consumption monitoring module for real-time classification and statistics of the power consumption of the heat pump host, circulating water pump and terminal equipment, and calculates the comprehensive energy efficiency ratio of the system.

[0011] In some embodiments, the sensors include temperature sensors, pressure sensors, flow sensors and electric energy meters, and all sensor data are transmitted to a central workstation in real time through a communication module.

[0012] In some embodiments, the actuator includes a variable frequency water pump and an electric valve. The variable frequency water pump dynamically adjusts the flow rate according to the terminal load demand, and the electric valve is used to automatically switch between cooling / heating working conditions.

[0013] In some embodiments, the central workstation is configured to:

[0014] Store and export historical operation data;

[0015] Automatically control the start and stop of the system according to the preset schedule, achieving unmanned operation;

[0016] Energy consumption percentage, equipment status and fault alarm information are displayed through a visual interface.

[0017] This embodiment also provides a method for monitoring energy consumption of a system, comprising the following steps:

[0018] Collect real-time operating parameters of heat pump host, water pump and terminal equipment through sensors;

[0019] Categorize and count the energy consumption data of each device, and calculate the comprehensive energy efficiency ratio of the system;

[0020] Optimize control strategies based on energy consumption data to achieve energy supply on demand.

[0021] In some embodiments, it also includes analyzing historical data through machine learning algorithms to predict future load demand and adjust system operating parameters in advance.

[0022] This embodiment also provides a computer-readable storage medium storing computer program instructions. When the instructions are executed by a processor, the energy consumption monitoring and optimization control method is implemented. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of a groundwater source heat pump system for measuring energy consumption provided in this embodiment;

[0024] Figure 2 Schematic diagram of the groundwater source heat pump system for measuring energy consumption provided in this embodiment. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0026] On the contrary, the present application covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present application as defined by the claims. Further, in order to make the public have a better understanding of the present application, some specific details are described in detail in the detailed description of the present application below. Those skilled in the art can fully understand the present application without the description of these details.

[0027] The following will be combined Figure 1-2 A groundwater source heat pump system and method for measuring energy consumption involved in the embodiments of the present application are described in detail. It should be noted that the following embodiments are only used to explain the present application and do not constitute a limitation on the present application.

[0028] See also Figure 1-2 , a groundwater source heat pump system that measures energy consumption, is suitable for new construction or energy-saving renovation projects such as residential buildings, schools, hospitals, hotels, supermarkets, office buildings, industrial parks, stations, airports, and grain and oil storage depots.

[0029] It includes the following four-level structures:

[0030] Level 1: Central workstation, i.e. control center. It is composed of PC host, display and printer, and is the core of automatic control system. All monitored groundwater source heat pump system equipment is centrally managed here and the energy efficiency ratio of the system is displayed.

[0031] The central workstation is configured as follows:

[0032] Store and export historical operation data;

[0033] Automatically control the start and stop of the system according to the preset schedule, achieving unmanned operation;

[0034] Energy consumption percentage, equipment status and fault alarm information are displayed through a visual interface.

[0035] Second level: The controller achieves precise control of the controlled equipment through its functions such as data acquisition, processing, analysis, algorithm execution and control command output.

[0036] The controller integrates an energy consumption monitoring module for real-time classification and statistics of the power consumption of the heat pump host, circulating water pump and terminal equipment, and calculates the comprehensive energy efficiency ratio (COP) of the system.

[0037] Level 3: Sensors and actuators, where the sensors are used to collect field signals and the actuators are used to execute control commands;

[0038] The sensors include temperature sensors, pressure sensors, flow sensors and electric energy metering instruments, and all sensor data are transmitted to the central workstation in real time through the communication module.

[0039] The actuator includes a variable frequency water pump and an electric valve. The variable frequency water pump dynamically adjusts the flow rate according to the terminal load demand, and the electric valve is used to automatically switch the cooling / heating working conditions.

[0040] Level 4: Groundwater source heat pump system, including outdoor heat exchange side, heat pump room and terminal central air-conditioning equipment, used to provide energy supply services for buildings.

[0041] The groundwater source heat pump system that measures energy consumption is perfectly combined with the automatic control system. By setting the system's operating time, the on-off time of the groundwater source heat pump system can be automatically controlled, without the need for on-duty personnel to take turns to open and shut down the system, achieving an unattended state. All sensors and actuators of the system use remote monitoring instruments and electric actuators, which can automatically monitor the operating data of each point, automatically switch the operating conditions of cooling / heating according to the needs of end customers, and combine the water pump frequency conversion technology to realize the on-demand supply of system energy.

[0042] All monitoring data of the system can be displayed, stored and exported in the control center. There is no need for on-site staff to read meters every day, month, quarter and year, which greatly reduces labor costs and improves the work efficiency of staff on duty. Most traditional central air conditioners are not combined with automatic control technology; water pump control technology; traditional central air conditioners with simple control systems can only monitor specific point parameters of the system, such as temperature, pressure, flow, etc., and cannot classify and count the power consumption of major equipment and display the energy efficiency ratio of the entire system.

[0043] The COP of groundwater source heat pump units is generally above 4, while the COP of conventional air-cooled heat pumps is between 2.5-3.0 and decreases as the outdoor temperature decreases. Groundwater source heat pumps have higher energy utilization rates, consuming 1kwh of electricity to generate 4kwh of heat or cooling, while traditional central air conditioners can only generate 2.5kwh to 3.0kwh of heat or cooling. When the project energy supply area reaches a certain scale, the operating cost of the system is significantly lower than that of traditional heat pump systems, reducing the operating cost of the system.

[0044] All monitoring data of the system can be displayed, stored and exported in the control center. There is no need for on-site staff to read meters every day, month, quarter and year, which greatly reduces labor costs and improves the work efficiency of staff on duty. Most traditional central air conditioners are not combined with automatic control technology; water pump control technology; traditional central air conditioners with simple control systems can only monitor specific point parameters of the system, such as temperature, pressure, flow, etc., and cannot classify and count the power consumption of major equipment and display the energy efficiency ratio of the entire system.

[0045] Compared with the traditional "water chiller + gas boiler" system, the groundwater source heat pump system does not produce any pollutants. The "water chiller + gas boiler" system will produce carbon dioxide, sulfur dioxide, nitrogen oxides, carbon monoxide and other pollutants. The groundwater source heat pump system is more environmentally friendly. The groundwater source heat pump system has played an important role in creating a zero-carbon, zero-pollution, and zero-emission demonstration project.

[0046] The traditional air-cooled heat pump unit supplies energy. As the ambient temperature decreases, the unit's heating capacity decreases. When the temperature and humidity reach a certain level in winter, the unit shuts down for defrosting and cannot supply energy to end users. The groundwater source heat pump system is a high-efficiency heat pump technology that uses the constant temperature characteristics of groundwater to achieve heating and cooling. It extracts heat or cold from groundwater to provide heating or cooling services for buildings, and discharges the heat or cold back into the groundwater for recycling. This system is more stable and safer than traditional air-cooled heat pump units.

[0047] The present application also provides an energy consumption monitoring method, comprising the following steps:

[0048] Collect real-time operating parameters of heat pump host, water pump and terminal equipment through sensors;

[0049] Categorize and count the energy consumption data of each device, and calculate the comprehensive energy efficiency ratio of the system;

[0050] Optimize control strategies based on energy consumption data to achieve energy supply on demand.

[0051] It further includes analyzing historical data through machine learning algorithms, predicting future load demand and adjusting system operating parameters in advance.

[0052] The beneficial effects that may be brought about by a groundwater source heat pump system and method for measuring energy consumption disclosed in this application include but are not limited to:

[0053] The system uses computer technology, automatic monitoring technology, communication technology, and automatic control technology to automatically monitor and control the outdoor heat exchange side of the groundwater source heat pump system, the ground source heat pump host, the circulating water pump, and the air conditioning terminal equipment in the building, and supply on demand. In addition to collecting first-hand operation point data, the system also adds energy consumption monitoring instruments and meters to classify and count the power consumption of the main equipment of the system, and calculate the comprehensive energy efficiency ratio of the groundwater source heat pump system. The user can more clearly understand the real energy-saving effect of the system.

[0054] It should be noted that, in this article, terms such as "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0055] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A groundwater source heat pump system for measuring energy consumption, characterized in that: include: Central workstation, consisting of a PC host, monitor and printer, is used to centrally manage equipment and display system energy efficiency ratio and energy consumption data; A controller configured to control the controlled device through data acquisition, processing, algorithm execution and control command output; Sensors and actuators, the sensors are used to collect field signals, and the actuators are used to execute control commands; The groundwater source heat pump system, including the outdoor heat exchange side, the heat pump room and the terminal central air-conditioning equipment, is used to provide energy supply services for the building.

2. The system according to claim 1, characterized in that The controller integrates an energy consumption monitoring module for real-time classification and statistics of the power consumption of the heat pump host, circulating water pump and terminal equipment, and calculates the comprehensive energy efficiency ratio of the system.

3. The system according to claim 1, characterized in that The sensors include temperature sensors, pressure sensors, flow sensors and electric energy metering instruments, and all sensor data are transmitted to the central workstation in real time through the communication module.

4. The system according to claim 1, characterized in that The actuator includes a variable frequency water pump and an electric valve. The variable frequency water pump dynamically adjusts the flow rate according to the terminal load demand, and the electric valve is used to automatically switch the cooling / heating working conditions.

5. The system according to claim 1, characterized in that The central workstation is configured as follows: Store and export historical operation data; Automatically control the start and stop of the system according to the preset schedule, achieving unmanned operation; Energy consumption percentage, equipment status and fault alarm information are displayed through a visual interface.

6. An energy consumption monitoring method based on the system according to any one of claims 1 to 5, characterized in that: The following steps are involved: Collect real-time operating parameters of heat pump host, water pump and terminal equipment through sensors; Categorize and count the energy consumption data of each device, and calculate the comprehensive energy efficiency ratio of the system; Optimize control strategies based on energy consumption data to achieve energy supply on demand.

7. The method according to claim 6, characterized in that It also includes analyzing historical data through machine learning algorithms, predicting future load demand and adjusting system operating parameters in advance.

8. A computer-readable storage medium, characterized in that: Computer program instructions are stored, and when the instructions are executed by the processor, the energy consumption monitoring and optimization control method as described in claims 6-7 is implemented.

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