CN-121189238-B - Ground source heat pump system energy efficiency monitoring platform based on digital twin

CN121189238BCN 121189238 BCN121189238 BCN 121189238BCN-121189238-B

Abstract

The invention relates to the field of energy system monitoring, in particular to a digital twin-based ground source heat pump system energy efficiency monitoring platform, which comprises a buried pipe monitoring module, a heat exchange efficiency analysis module, a buried pipe state analysis module and a health state analysis module. According to the invention, fluid data such as inlet and outlet temperature, flow, pressure and the like, and health state parameters such as vibration frequency, soil moisture content, fluid conductivity and the like are synchronously collected through the buried pipe monitoring module, so that three directions of heat exchange, flow and health of the buried pipe are covered. According to the invention, the heat exchange qualification rate, the flow qualification rate and the health qualification rate are deduced through the buried pipe state analysis module, the influence coefficient is set according to the actual scene, the comprehensive energy efficiency is calculated, the health grade is divided according to the comprehensive energy efficiency, different treatment timeliness is formulated for three grades of normal, early warning and abnormal buried pipes, and corresponding treatment suggestions are generated for the qualification conditions of the heat exchange qualification rate, the flow qualification rate and the health qualification rate.

Inventors

QI BOYU
GONG LICHAO
LIU MANJIAO

Assignees

吉林省碧蓝新能源科技有限公司

Dates

Publication Date: 20260508
Application Date: 20251121

Claims (7)

1. Ground source heat pump system energy efficiency monitoring platform based on digital twin, its characterized in that includes: The buried pipe monitoring module is used for setting monitoring points at a plurality of buried pipes connected with the ground source heat pump and acquiring inlet and outlet temperatures, fluid data and health state parameters of buried pipe transmission fluid in each preset time period; the heat exchange efficiency analysis module is used for analyzing the heat exchange quantity of the buried pipe according to the inlet and outlet temperatures and the fluid data in each preset time period and analyzing the heat exchange rate of the buried pipe according to the heat exchange quantity of the buried pipe; The buried pipe state analysis module is used for analyzing the heat exchange qualification degree of the buried pipe according to the heat exchange quantity and the heat exchange rate of the buried pipe for each buried pipe in each preset time period; the health state analysis module is used for analyzing the comprehensive energy efficiency of the buried pipes based on the heat exchange qualification degree, the flow qualification degree and the health qualification degree, judging the health condition of each buried pipe according to the comprehensive energy efficiency, and carrying out corresponding early warning treatment; The specific analysis mode of the comprehensive energy efficiency is that corresponding heat exchange qualification degree, flow qualification degree and health qualification degree influence coefficients are set based on the service life of the ground source heat pump system and environmental conditions, the heat exchange qualification degree, the flow qualification degree and the health qualification degree are multiplied by the set influence coefficients, and the multiplied results are overlapped to obtain the comprehensive energy efficiency; The concrete analysis mode of the heat exchange quantity of the buried pipes comprises the steps of reading the density and specific heat capacity of fluid transmitted by the buried pipes, calculating the difference value according to the inlet and outlet temperatures to obtain the temperature difference of the inlet and outlet of the buried pipes, simultaneously reading the flow of the fluid, calculating the heat exchange quantity of single buried pipes in a preset time period according to the flow of the fluid, accumulating the heat exchange quantity of each buried pipe to obtain the total heat exchange quantity of the buried pipes, analyzing the correction coefficient between the buried pipes according to the distance between the buried pipes, and taking the product of the total heat exchange quantity and the correction coefficient as the heat exchange quantity of the buried pipes; the analysis mode of the correction coefficient comprises the steps of calculating the heat influence proportion between buried pipes according to the center distance of the buried pipes and the heat conductivity coefficient of soil, and correcting by combining actual monitoring data to finally obtain the correction coefficient.
2. The digital twinning-based ground source heat pump system energy efficiency monitoring platform of claim 1, wherein the fluid data comprises flow rate, flow velocity and inlet and outlet pressure, and the health state parameters comprise vibration frequency, soil moisture content and fluid conductivity.
3. The digital twinning-based ground source heat pump system energy efficiency monitoring platform according to claim 1, wherein the judging mode of whether the ground source heat pump system meets the requirements is as follows: Reading the real-time rated heating capacity of the heat pump unit in the same preset time period, and taking the ratio of the heat exchange capacity of the buried pipe to the rated heating capacity as the heat exchange rate of the buried pipe; And comparing the heat exchange rate with a set heat exchange rate threshold interval, if the heat exchange rate is within the threshold interval, the energy efficiency of the ground source heat pump system reaches the standard, further analysis of the buried pipe is not needed, and otherwise, the buried pipe state analysis module is needed to analyze the state of the buried pipe.
4. The digital twinning-based ground source heat pump system energy efficiency monitoring platform according to claim 1, wherein the specific analysis mode of the heat exchange qualification degree is as follows: Calculating the heat exchange quantity of each buried pipe, obtaining the heat exchange quantity average value of the heat exchange pipes in a mean value calculation mode, and calculating the ratio of the heat exchange quantity of each buried pipe to the heat exchange quantity average value to obtain the heat exchange rate of each buried pipe; And calculating the heat exchange rate of each buried pipe in a plurality of preset time periods by adopting the same analysis mode, carrying out mean value calculation on the heat exchange rate and the current heat exchange rate, and taking the calculation result as the heat exchange qualification degree.
5. The digital twinning-based ground source heat pump system energy efficiency monitoring platform according to claim 2, wherein the specific analysis mode of the flow qualification is as follows: Reading the length and the pipe diameter of each buried pipe, and carrying out average calculation on the lengths and the pipe diameters of each buried pipe to obtain the average length and the average diameter of each buried pipe; The length and the pipe diameter of each buried pipe are respectively compared with the average length and the average pipe diameter to obtain the length deviation rate and the pipe diameter deviation rate of each buried pipe; analyzing the pressure value of each buried pipe inlet and outlet and the length deviation rate and the pipe diameter deviation rate to obtain the pressure deviation rate; reading the flow value of each buried pipe in a preset time period for several times, calculating an average value, and calculating a flow deviation rate based on the flow value of the current preset time period; and analyzing the flow deviation rate and the pressure deviation rate to obtain the flow qualification degree.
6. The digital twin-based ground source heat pump system energy efficiency monitoring platform according to claim 2, wherein the specific analysis mode of the health qualification is that the vibration deviation rate, the water content deviation rate and the conductivity deviation rate are obtained by respectively analyzing the vibration frequency, the soil water content and the fluid conductivity with set standard values, and the vibration deviation rate, the water content deviation rate and the conductivity deviation rate are analyzed to obtain the health qualification.
7. The digital twin ground source heat pump system energy efficiency monitoring platform according to claim 1 is characterized in that the concrete analysis mode of the health conditions of all buried pipes is that the comprehensive energy efficiency is used for carrying out grading evaluation on all buried pipes, the health conditions of the buried pipes are divided into three grades of normal, early warning and abnormal, fault contents of the buried pipes divided into the early warning and abnormal grades are judged based on the heat exchange qualification, the flow qualification and the health qualification of the buried pipes, and corresponding fault treatment suggestions are generated.

Description

Ground source heat pump system energy efficiency monitoring platform based on digital twin Technical Field The invention relates to the field of energy system monitoring, in particular to a ground source heat pump system energy efficiency monitoring platform based on digital twinning. Background The ground source heat pump system is used as high-efficiency energy-saving energy utilization equipment, and is widely applied to the fields of building heating, refrigerating and the like by virtue of the advantages of clean and stable heat exchange. The buried pipe is used as a core carrier for system energy exchange, and the heat exchange capacity, the flow stability and the health state of the buried pipe directly determine the energy efficiency level, the operation life and the safety reliability of the system, so that the buried pipe is a key link for guaranteeing the energy utilization efficiency and the operation maintenance safety in the ground source heat pump system. Therefore, in order to realize the fine monitoring and Gao Xiaoyun dimension of the ground source heat pump system, a comprehensive energy efficiency monitoring system which covers the full state and the multiple dimensions of the buried pipe needs to be constructed. Related energy efficiency monitoring methods are also provided in the prior art, for example, a Chinese patent application with publication number of CN116952415A discloses an energy efficiency monitoring system for a ground source heat pump and a monitoring method thereof. According to the energy efficiency monitoring system, the data is collected through the data collection structure and then is processed through the data processing structure, so that the energy efficiency of the real-time ground source heat pump is automatically obtained. The energy efficiency monitoring system of the ground source heat pump mainly relies on single heat exchange parameter monitoring, comprehensive analysis on heat exchange, flow and health state of buried pipes and differential fault treatment strategies are not fully considered, complex operation requirements of the system under different service lives and different environmental conditions are difficult to adapt, and meanwhile, no relevant relation exists in the aspect of fault early warning. In summary, the technical scheme is used for monitoring the buried pipe of the ground source heat pump system, and has the following problems that (1) in the prior art, only parameters in a single direction are adopted for monitoring, a scheme for collaborative analysis of a plurality of direction parameters is not constructed, the analysis of the parameters in the single direction has larger limitation, the buried pipe is required to refer to the problem of heat exchange quantity, and the fault degree is required to be quantitatively analyzed by combining with related factors such as fluid flow, soil environment and the like, so that the monitoring is lack of comprehensiveness and accuracy. (2) The prior art cannot establish comprehensive energy efficiency evaluation standards, is difficult to distinguish different state grades of normal, early warning and abnormality of the buried pipe, only depends on total heat exchange quantity or single fault signals, cannot accurately position the buried pipe with faults and specific fault types, and further cannot perform corresponding processing operation on the faults of the buried pipe. Disclosure of Invention The invention solves the technical problems and adopts the following technical scheme that the digital twin-based ground source heat pump system energy efficiency monitoring platform comprises a buried pipe monitoring module, a monitoring module and a monitoring module, wherein the buried pipe monitoring module is used for setting monitoring points at a plurality of buried pipes connected with a ground source heat pump and acquiring inlet and outlet temperatures, fluid data and health state parameters of buried pipe transmission fluid in each preset time period. And the heat exchange efficiency analysis module is used for analyzing the heat exchange quantity of the buried pipe according to the inlet and outlet temperatures and the fluid data in each preset time period and analyzing the heat exchange rate of the buried pipe according to the heat exchange quantity of the buried pipe, judging whether the energy efficiency of the ground source heat pump system meets the standard or not based on the heat exchange rate of the buried pipe, if the energy efficiency of the ground source heat pump system meets the standard, continuing to monitor the buried pipe, and if the energy efficiency of the ground source heat pump system does not meet the standard, analyzing the state of the buried pipe. The buried pipe state analysis module is used for analyzing the heat exchange qualification degree of the buried pipe according to the heat exchange quantity and the heat exchange rate of the buried pipe for each buried p